Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * This file is subject to the terms and conditions of the GNU General Public |
| 3 | * License. See the file "COPYING" in the main directory of this archive |
| 4 | * for more details. |
| 5 | * |
| 6 | * Synthesize TLB refill handlers at runtime. |
| 7 | * |
Ralf Baechle | 7034228 | 2013-01-22 12:59:30 +0100 | [diff] [blame] | 8 | * Copyright (C) 2004, 2005, 2006, 2008 Thiemo Seufer |
| 9 | * Copyright (C) 2005, 2007, 2008, 2009 Maciej W. Rozycki |
Ralf Baechle | 41c594a | 2006-04-05 09:45:45 +0100 | [diff] [blame] | 10 | * Copyright (C) 2006 Ralf Baechle (ralf@linux-mips.org) |
David Daney | fd062c8 | 2009-05-27 17:47:44 -0700 | [diff] [blame] | 11 | * Copyright (C) 2008, 2009 Cavium Networks, Inc. |
Steven J. Hill | 113c62d | 2012-07-06 23:56:00 +0200 | [diff] [blame] | 12 | * Copyright (C) 2011 MIPS Technologies, Inc. |
Ralf Baechle | 41c594a | 2006-04-05 09:45:45 +0100 | [diff] [blame] | 13 | * |
| 14 | * ... and the days got worse and worse and now you see |
| 15 | * I've gone completly out of my mind. |
| 16 | * |
| 17 | * They're coming to take me a away haha |
| 18 | * they're coming to take me a away hoho hihi haha |
| 19 | * to the funny farm where code is beautiful all the time ... |
| 20 | * |
| 21 | * (Condolences to Napoleon XIV) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | */ |
| 23 | |
David Daney | 95affdd | 2009-05-20 11:40:59 -0700 | [diff] [blame] | 24 | #include <linux/bug.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | #include <linux/kernel.h> |
| 26 | #include <linux/types.h> |
Ralf Baechle | 631330f | 2009-06-19 14:05:26 +0100 | [diff] [blame] | 27 | #include <linux/smp.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | #include <linux/string.h> |
| 29 | #include <linux/init.h> |
David Daney | 3d8bfdd | 2010-12-21 14:19:11 -0800 | [diff] [blame] | 30 | #include <linux/cache.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | |
Steven J. Hill | d532f3d | 2013-03-25 11:58:57 -0500 | [diff] [blame] | 32 | #include <asm/mmu_context.h> |
David Daney | 3d8bfdd | 2010-12-21 14:19:11 -0800 | [diff] [blame] | 33 | #include <asm/cacheflush.h> |
| 34 | #include <asm/pgtable.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | #include <asm/war.h> |
Florian Fainelli | 3482d71 | 2010-01-28 15:21:24 +0100 | [diff] [blame] | 36 | #include <asm/uasm.h> |
David Howells | b81947c | 2012-03-28 18:30:02 +0100 | [diff] [blame] | 37 | #include <asm/setup.h> |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 38 | |
David Daney | 1ec5632 | 2010-04-28 12:16:18 -0700 | [diff] [blame] | 39 | /* |
| 40 | * TLB load/store/modify handlers. |
| 41 | * |
| 42 | * Only the fastpath gets synthesized at runtime, the slowpath for |
| 43 | * do_page_fault remains normal asm. |
| 44 | */ |
| 45 | extern void tlb_do_page_fault_0(void); |
| 46 | extern void tlb_do_page_fault_1(void); |
| 47 | |
David Daney | bf28607 | 2011-07-05 16:34:46 -0700 | [diff] [blame] | 48 | struct work_registers { |
| 49 | int r1; |
| 50 | int r2; |
| 51 | int r3; |
| 52 | }; |
| 53 | |
| 54 | struct tlb_reg_save { |
| 55 | unsigned long a; |
| 56 | unsigned long b; |
| 57 | } ____cacheline_aligned_in_smp; |
| 58 | |
| 59 | static struct tlb_reg_save handler_reg_save[NR_CPUS]; |
David Daney | 1ec5632 | 2010-04-28 12:16:18 -0700 | [diff] [blame] | 60 | |
Ralf Baechle | aeffdbb | 2007-10-11 23:46:14 +0100 | [diff] [blame] | 61 | static inline int r45k_bvahwbug(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | { |
| 63 | /* XXX: We should probe for the presence of this bug, but we don't. */ |
| 64 | return 0; |
| 65 | } |
| 66 | |
Ralf Baechle | aeffdbb | 2007-10-11 23:46:14 +0100 | [diff] [blame] | 67 | static inline int r4k_250MHZhwbug(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | { |
| 69 | /* XXX: We should probe for the presence of this bug, but we don't. */ |
| 70 | return 0; |
| 71 | } |
| 72 | |
Ralf Baechle | aeffdbb | 2007-10-11 23:46:14 +0100 | [diff] [blame] | 73 | static inline int __maybe_unused bcm1250_m3_war(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | { |
| 75 | return BCM1250_M3_WAR; |
| 76 | } |
| 77 | |
Ralf Baechle | aeffdbb | 2007-10-11 23:46:14 +0100 | [diff] [blame] | 78 | static inline int __maybe_unused r10000_llsc_war(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | { |
| 80 | return R10000_LLSC_WAR; |
| 81 | } |
| 82 | |
David Daney | cc33ae4 | 2010-12-20 15:54:50 -0800 | [diff] [blame] | 83 | static int use_bbit_insns(void) |
| 84 | { |
| 85 | switch (current_cpu_type()) { |
| 86 | case CPU_CAVIUM_OCTEON: |
| 87 | case CPU_CAVIUM_OCTEON_PLUS: |
| 88 | case CPU_CAVIUM_OCTEON2: |
| 89 | return 1; |
| 90 | default: |
| 91 | return 0; |
| 92 | } |
| 93 | } |
| 94 | |
David Daney | 2c8c53e | 2010-12-27 18:07:57 -0800 | [diff] [blame] | 95 | static int use_lwx_insns(void) |
| 96 | { |
| 97 | switch (current_cpu_type()) { |
| 98 | case CPU_CAVIUM_OCTEON2: |
| 99 | return 1; |
| 100 | default: |
| 101 | return 0; |
| 102 | } |
| 103 | } |
| 104 | #if defined(CONFIG_CAVIUM_OCTEON_CVMSEG_SIZE) && \ |
| 105 | CONFIG_CAVIUM_OCTEON_CVMSEG_SIZE > 0 |
| 106 | static bool scratchpad_available(void) |
| 107 | { |
| 108 | return true; |
| 109 | } |
| 110 | static int scratchpad_offset(int i) |
| 111 | { |
| 112 | /* |
| 113 | * CVMSEG starts at address -32768 and extends for |
| 114 | * CAVIUM_OCTEON_CVMSEG_SIZE 128 byte cache lines. |
| 115 | */ |
| 116 | i += 1; /* Kernel use starts at the top and works down. */ |
| 117 | return CONFIG_CAVIUM_OCTEON_CVMSEG_SIZE * 128 - (8 * i) - 32768; |
| 118 | } |
| 119 | #else |
| 120 | static bool scratchpad_available(void) |
| 121 | { |
| 122 | return false; |
| 123 | } |
| 124 | static int scratchpad_offset(int i) |
| 125 | { |
| 126 | BUG(); |
David Daney | e1c87d2 | 2011-01-19 15:24:42 -0800 | [diff] [blame] | 127 | /* Really unreachable, but evidently some GCC want this. */ |
| 128 | return 0; |
David Daney | 2c8c53e | 2010-12-27 18:07:57 -0800 | [diff] [blame] | 129 | } |
| 130 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 131 | /* |
Maciej W. Rozycki | 8df5bea | 2006-08-23 14:26:50 +0100 | [diff] [blame] | 132 | * Found by experiment: At least some revisions of the 4kc throw under |
| 133 | * some circumstances a machine check exception, triggered by invalid |
| 134 | * values in the index register. Delaying the tlbp instruction until |
| 135 | * after the next branch, plus adding an additional nop in front of |
| 136 | * tlbwi/tlbwr avoids the invalid index register values. Nobody knows |
| 137 | * why; it's not an issue caused by the core RTL. |
| 138 | * |
| 139 | */ |
Ralf Baechle | 234fcd1 | 2008-03-08 09:56:28 +0000 | [diff] [blame] | 140 | static int __cpuinit m4kc_tlbp_war(void) |
Maciej W. Rozycki | 8df5bea | 2006-08-23 14:26:50 +0100 | [diff] [blame] | 141 | { |
| 142 | return (current_cpu_data.processor_id & 0xffff00) == |
| 143 | (PRID_COMP_MIPS | PRID_IMP_4KC); |
| 144 | } |
| 145 | |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 146 | /* Handle labels (which must be positive integers). */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | enum label_id { |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 148 | label_second_part = 1, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | label_leave, |
| 150 | label_vmalloc, |
| 151 | label_vmalloc_done, |
Ralf Baechle | 02a5417 | 2012-10-13 22:46:26 +0200 | [diff] [blame] | 152 | label_tlbw_hazard_0, |
| 153 | label_split = label_tlbw_hazard_0 + 8, |
David Daney | 6dd9344 | 2010-02-10 15:12:47 -0800 | [diff] [blame] | 154 | label_tlbl_goaround1, |
| 155 | label_tlbl_goaround2, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 156 | label_nopage_tlbl, |
| 157 | label_nopage_tlbs, |
| 158 | label_nopage_tlbm, |
| 159 | label_smp_pgtable_change, |
| 160 | label_r3000_write_probe_fail, |
David Daney | 1ec5632 | 2010-04-28 12:16:18 -0700 | [diff] [blame] | 161 | label_large_segbits_fault, |
David Daney | aa1762f | 2012-10-17 00:48:10 +0200 | [diff] [blame] | 162 | #ifdef CONFIG_MIPS_HUGE_TLB_SUPPORT |
David Daney | fd062c8 | 2009-05-27 17:47:44 -0700 | [diff] [blame] | 163 | label_tlb_huge_update, |
| 164 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 165 | }; |
| 166 | |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 167 | UASM_L_LA(_second_part) |
| 168 | UASM_L_LA(_leave) |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 169 | UASM_L_LA(_vmalloc) |
| 170 | UASM_L_LA(_vmalloc_done) |
Ralf Baechle | 02a5417 | 2012-10-13 22:46:26 +0200 | [diff] [blame] | 171 | /* _tlbw_hazard_x is handled differently. */ |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 172 | UASM_L_LA(_split) |
David Daney | 6dd9344 | 2010-02-10 15:12:47 -0800 | [diff] [blame] | 173 | UASM_L_LA(_tlbl_goaround1) |
| 174 | UASM_L_LA(_tlbl_goaround2) |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 175 | UASM_L_LA(_nopage_tlbl) |
| 176 | UASM_L_LA(_nopage_tlbs) |
| 177 | UASM_L_LA(_nopage_tlbm) |
| 178 | UASM_L_LA(_smp_pgtable_change) |
| 179 | UASM_L_LA(_r3000_write_probe_fail) |
David Daney | 1ec5632 | 2010-04-28 12:16:18 -0700 | [diff] [blame] | 180 | UASM_L_LA(_large_segbits_fault) |
David Daney | aa1762f | 2012-10-17 00:48:10 +0200 | [diff] [blame] | 181 | #ifdef CONFIG_MIPS_HUGE_TLB_SUPPORT |
David Daney | fd062c8 | 2009-05-27 17:47:44 -0700 | [diff] [blame] | 182 | UASM_L_LA(_tlb_huge_update) |
| 183 | #endif |
Atsushi Nemoto | 656be92 | 2006-10-26 00:08:31 +0900 | [diff] [blame] | 184 | |
Ralf Baechle | 02a5417 | 2012-10-13 22:46:26 +0200 | [diff] [blame] | 185 | static int __cpuinitdata hazard_instance; |
| 186 | |
Kevin Cernekee | f151f3b | 2012-11-07 18:39:48 +0000 | [diff] [blame] | 187 | static void __cpuinit uasm_bgezl_hazard(u32 **p, |
| 188 | struct uasm_reloc **r, |
| 189 | int instance) |
Ralf Baechle | 02a5417 | 2012-10-13 22:46:26 +0200 | [diff] [blame] | 190 | { |
| 191 | switch (instance) { |
| 192 | case 0 ... 7: |
| 193 | uasm_il_bgezl(p, r, 0, label_tlbw_hazard_0 + instance); |
| 194 | return; |
| 195 | default: |
| 196 | BUG(); |
| 197 | } |
| 198 | } |
| 199 | |
Kevin Cernekee | f151f3b | 2012-11-07 18:39:48 +0000 | [diff] [blame] | 200 | static void __cpuinit uasm_bgezl_label(struct uasm_label **l, |
| 201 | u32 **p, |
| 202 | int instance) |
Ralf Baechle | 02a5417 | 2012-10-13 22:46:26 +0200 | [diff] [blame] | 203 | { |
| 204 | switch (instance) { |
| 205 | case 0 ... 7: |
| 206 | uasm_build_label(l, *p, label_tlbw_hazard_0 + instance); |
| 207 | break; |
| 208 | default: |
| 209 | BUG(); |
| 210 | } |
| 211 | } |
| 212 | |
Franck Bui-Huu | 92b1e6a | 2007-10-18 09:11:17 +0200 | [diff] [blame] | 213 | /* |
Ralf Baechle | a2c763e | 2012-10-16 22:20:26 +0200 | [diff] [blame] | 214 | * pgtable bits are assigned dynamically depending on processor feature |
| 215 | * and statically based on kernel configuration. This spits out the actual |
Ralf Baechle | 7034228 | 2013-01-22 12:59:30 +0100 | [diff] [blame] | 216 | * values the kernel is using. Required to make sense from disassembled |
Ralf Baechle | a2c763e | 2012-10-16 22:20:26 +0200 | [diff] [blame] | 217 | * TLB exception handlers. |
Franck Bui-Huu | 92b1e6a | 2007-10-18 09:11:17 +0200 | [diff] [blame] | 218 | */ |
Ralf Baechle | a2c763e | 2012-10-16 22:20:26 +0200 | [diff] [blame] | 219 | static void output_pgtable_bits_defines(void) |
| 220 | { |
| 221 | #define pr_define(fmt, ...) \ |
| 222 | pr_debug("#define " fmt, ##__VA_ARGS__) |
| 223 | |
| 224 | pr_debug("#include <asm/asm.h>\n"); |
| 225 | pr_debug("#include <asm/regdef.h>\n"); |
| 226 | pr_debug("\n"); |
| 227 | |
| 228 | pr_define("_PAGE_PRESENT_SHIFT %d\n", _PAGE_PRESENT_SHIFT); |
| 229 | pr_define("_PAGE_READ_SHIFT %d\n", _PAGE_READ_SHIFT); |
| 230 | pr_define("_PAGE_WRITE_SHIFT %d\n", _PAGE_WRITE_SHIFT); |
| 231 | pr_define("_PAGE_ACCESSED_SHIFT %d\n", _PAGE_ACCESSED_SHIFT); |
| 232 | pr_define("_PAGE_MODIFIED_SHIFT %d\n", _PAGE_MODIFIED_SHIFT); |
Ralf Baechle | 970d032 | 2012-10-18 13:54:15 +0200 | [diff] [blame] | 233 | #ifdef CONFIG_MIPS_HUGE_TLB_SUPPORT |
Ralf Baechle | a2c763e | 2012-10-16 22:20:26 +0200 | [diff] [blame] | 234 | pr_define("_PAGE_HUGE_SHIFT %d\n", _PAGE_HUGE_SHIFT); |
Ralf Baechle | 970d032 | 2012-10-18 13:54:15 +0200 | [diff] [blame] | 235 | pr_define("_PAGE_SPLITTING_SHIFT %d\n", _PAGE_SPLITTING_SHIFT); |
Ralf Baechle | a2c763e | 2012-10-16 22:20:26 +0200 | [diff] [blame] | 236 | #endif |
| 237 | if (cpu_has_rixi) { |
| 238 | #ifdef _PAGE_NO_EXEC_SHIFT |
| 239 | pr_define("_PAGE_NO_EXEC_SHIFT %d\n", _PAGE_NO_EXEC_SHIFT); |
| 240 | #endif |
| 241 | #ifdef _PAGE_NO_READ_SHIFT |
| 242 | pr_define("_PAGE_NO_READ_SHIFT %d\n", _PAGE_NO_READ_SHIFT); |
| 243 | #endif |
| 244 | } |
| 245 | pr_define("_PAGE_GLOBAL_SHIFT %d\n", _PAGE_GLOBAL_SHIFT); |
| 246 | pr_define("_PAGE_VALID_SHIFT %d\n", _PAGE_VALID_SHIFT); |
| 247 | pr_define("_PAGE_DIRTY_SHIFT %d\n", _PAGE_DIRTY_SHIFT); |
| 248 | pr_define("_PFN_SHIFT %d\n", _PFN_SHIFT); |
| 249 | pr_debug("\n"); |
| 250 | } |
| 251 | |
| 252 | static inline void dump_handler(const char *symbol, const u32 *handler, int count) |
Franck Bui-Huu | 92b1e6a | 2007-10-18 09:11:17 +0200 | [diff] [blame] | 253 | { |
| 254 | int i; |
| 255 | |
Ralf Baechle | a2c763e | 2012-10-16 22:20:26 +0200 | [diff] [blame] | 256 | pr_debug("LEAF(%s)\n", symbol); |
| 257 | |
Franck Bui-Huu | 92b1e6a | 2007-10-18 09:11:17 +0200 | [diff] [blame] | 258 | pr_debug("\t.set push\n"); |
| 259 | pr_debug("\t.set noreorder\n"); |
| 260 | |
| 261 | for (i = 0; i < count; i++) |
Ralf Baechle | a2c763e | 2012-10-16 22:20:26 +0200 | [diff] [blame] | 262 | pr_debug("\t.word\t0x%08x\t\t# %p\n", handler[i], &handler[i]); |
Franck Bui-Huu | 92b1e6a | 2007-10-18 09:11:17 +0200 | [diff] [blame] | 263 | |
Ralf Baechle | a2c763e | 2012-10-16 22:20:26 +0200 | [diff] [blame] | 264 | pr_debug("\t.set\tpop\n"); |
| 265 | |
| 266 | pr_debug("\tEND(%s)\n", symbol); |
Franck Bui-Huu | 92b1e6a | 2007-10-18 09:11:17 +0200 | [diff] [blame] | 267 | } |
| 268 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | /* The only general purpose registers allowed in TLB handlers. */ |
| 270 | #define K0 26 |
| 271 | #define K1 27 |
| 272 | |
| 273 | /* Some CP0 registers */ |
Ralf Baechle | 41c594a | 2006-04-05 09:45:45 +0100 | [diff] [blame] | 274 | #define C0_INDEX 0, 0 |
| 275 | #define C0_ENTRYLO0 2, 0 |
| 276 | #define C0_TCBIND 2, 2 |
| 277 | #define C0_ENTRYLO1 3, 0 |
| 278 | #define C0_CONTEXT 4, 0 |
David Daney | fd062c8 | 2009-05-27 17:47:44 -0700 | [diff] [blame] | 279 | #define C0_PAGEMASK 5, 0 |
Ralf Baechle | 41c594a | 2006-04-05 09:45:45 +0100 | [diff] [blame] | 280 | #define C0_BADVADDR 8, 0 |
| 281 | #define C0_ENTRYHI 10, 0 |
| 282 | #define C0_EPC 14, 0 |
| 283 | #define C0_XCONTEXT 20, 0 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 284 | |
Ralf Baechle | 875d43e | 2005-09-03 15:56:16 -0700 | [diff] [blame] | 285 | #ifdef CONFIG_64BIT |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 286 | # define GET_CONTEXT(buf, reg) UASM_i_MFC0(buf, reg, C0_XCONTEXT) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | #else |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 288 | # define GET_CONTEXT(buf, reg) UASM_i_MFC0(buf, reg, C0_CONTEXT) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 289 | #endif |
| 290 | |
| 291 | /* The worst case length of the handler is around 18 instructions for |
| 292 | * R3000-style TLBs and up to 63 instructions for R4000-style TLBs. |
| 293 | * Maximum space available is 32 instructions for R3000 and 64 |
| 294 | * instructions for R4000. |
| 295 | * |
| 296 | * We deliberately chose a buffer size of 128, so we won't scribble |
| 297 | * over anything important on overflow before we panic. |
| 298 | */ |
Ralf Baechle | 234fcd1 | 2008-03-08 09:56:28 +0000 | [diff] [blame] | 299 | static u32 tlb_handler[128] __cpuinitdata; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 300 | |
| 301 | /* simply assume worst case size for labels and relocs */ |
Ralf Baechle | 234fcd1 | 2008-03-08 09:56:28 +0000 | [diff] [blame] | 302 | static struct uasm_label labels[128] __cpuinitdata; |
| 303 | static struct uasm_reloc relocs[128] __cpuinitdata; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 304 | |
David Daney | 1ec5632 | 2010-04-28 12:16:18 -0700 | [diff] [blame] | 305 | #ifdef CONFIG_64BIT |
| 306 | static int check_for_high_segbits __cpuinitdata; |
| 307 | #endif |
| 308 | |
Steven J. Hill | d532f3d | 2013-03-25 11:58:57 -0500 | [diff] [blame] | 309 | static void __cpuinit insn_fixup(unsigned int **start, unsigned int **stop, |
| 310 | unsigned int i_const) |
| 311 | { |
Steven J. Hill | f6b06d9 | 2013-03-25 12:01:00 -0500 | [diff] [blame] | 312 | unsigned int **p; |
Steven J. Hill | d532f3d | 2013-03-25 11:58:57 -0500 | [diff] [blame] | 313 | |
| 314 | for (p = start; p < stop; p++) { |
Steven J. Hill | f6b06d9 | 2013-03-25 12:01:00 -0500 | [diff] [blame] | 315 | #ifndef CONFIG_CPU_MICROMIPS |
| 316 | unsigned int *ip; |
| 317 | |
Steven J. Hill | d532f3d | 2013-03-25 11:58:57 -0500 | [diff] [blame] | 318 | ip = *p; |
| 319 | *ip = (*ip & 0xffff0000) | i_const; |
Steven J. Hill | f6b06d9 | 2013-03-25 12:01:00 -0500 | [diff] [blame] | 320 | #else |
| 321 | unsigned short *ip; |
| 322 | |
| 323 | ip = ((unsigned short *)((unsigned int)*p - 1)); |
| 324 | if ((*ip & 0xf000) == 0x4000) { |
| 325 | *ip &= 0xfff1; |
| 326 | *ip |= (i_const << 1); |
| 327 | } else if ((*ip & 0xf000) == 0x6000) { |
| 328 | *ip &= 0xfff1; |
| 329 | *ip |= ((i_const >> 2) << 1); |
| 330 | } else { |
| 331 | ip++; |
| 332 | *ip = i_const; |
| 333 | } |
| 334 | #endif |
| 335 | local_flush_icache_range((unsigned long)ip, |
| 336 | (unsigned long)ip + sizeof(*ip)); |
Steven J. Hill | d532f3d | 2013-03-25 11:58:57 -0500 | [diff] [blame] | 337 | } |
Steven J. Hill | d532f3d | 2013-03-25 11:58:57 -0500 | [diff] [blame] | 338 | } |
| 339 | |
| 340 | #define asid_insn_fixup(section, const) \ |
| 341 | do { \ |
| 342 | extern unsigned int *__start_ ## section; \ |
| 343 | extern unsigned int *__stop_ ## section; \ |
| 344 | insn_fixup(&__start_ ## section, &__stop_ ## section, const); \ |
| 345 | } while(0) |
| 346 | |
| 347 | /* |
| 348 | * Caller is assumed to flush the caches before the first context switch. |
| 349 | */ |
| 350 | static void __cpuinit setup_asid(unsigned int inc, unsigned int mask, |
| 351 | unsigned int version_mask, |
| 352 | unsigned int first_version) |
| 353 | { |
| 354 | extern asmlinkage void handle_ri_rdhwr_vivt(void); |
| 355 | unsigned long *vivt_exc; |
| 356 | |
Steven J. Hill | f6b06d9 | 2013-03-25 12:01:00 -0500 | [diff] [blame] | 357 | #ifdef CONFIG_CPU_MICROMIPS |
| 358 | /* |
| 359 | * Worst case optimised microMIPS addiu instructions support |
| 360 | * only a 3-bit immediate value. |
| 361 | */ |
| 362 | if(inc > 7) |
| 363 | panic("Invalid ASID increment value!"); |
| 364 | #endif |
Steven J. Hill | d532f3d | 2013-03-25 11:58:57 -0500 | [diff] [blame] | 365 | asid_insn_fixup(__asid_inc, inc); |
| 366 | asid_insn_fixup(__asid_mask, mask); |
| 367 | asid_insn_fixup(__asid_version_mask, version_mask); |
| 368 | asid_insn_fixup(__asid_first_version, first_version); |
| 369 | |
| 370 | /* Patch up the 'handle_ri_rdhwr_vivt' handler. */ |
| 371 | vivt_exc = (unsigned long *) &handle_ri_rdhwr_vivt; |
Steven J. Hill | f6b06d9 | 2013-03-25 12:01:00 -0500 | [diff] [blame] | 372 | #ifdef CONFIG_CPU_MICROMIPS |
| 373 | vivt_exc = (unsigned long *)((unsigned long) vivt_exc - 1); |
| 374 | #endif |
Steven J. Hill | d532f3d | 2013-03-25 11:58:57 -0500 | [diff] [blame] | 375 | vivt_exc++; |
| 376 | *vivt_exc = (*vivt_exc & ~mask) | mask; |
| 377 | |
| 378 | current_cpu_data.asid_cache = first_version; |
| 379 | } |
| 380 | |
David Daney | 2c8c53e | 2010-12-27 18:07:57 -0800 | [diff] [blame] | 381 | static int check_for_high_segbits __cpuinitdata; |
David Daney | 3d8bfdd | 2010-12-21 14:19:11 -0800 | [diff] [blame] | 382 | |
| 383 | static unsigned int kscratch_used_mask __cpuinitdata; |
| 384 | |
| 385 | static int __cpuinit allocate_kscratch(void) |
| 386 | { |
| 387 | int r; |
| 388 | unsigned int a = cpu_data[0].kscratch_mask & ~kscratch_used_mask; |
| 389 | |
| 390 | r = ffs(a); |
| 391 | |
| 392 | if (r == 0) |
| 393 | return -1; |
| 394 | |
| 395 | r--; /* make it zero based */ |
| 396 | |
| 397 | kscratch_used_mask |= (1 << r); |
| 398 | |
| 399 | return r; |
| 400 | } |
| 401 | |
David Daney | 2c8c53e | 2010-12-27 18:07:57 -0800 | [diff] [blame] | 402 | static int scratch_reg __cpuinitdata; |
David Daney | 3d8bfdd | 2010-12-21 14:19:11 -0800 | [diff] [blame] | 403 | static int pgd_reg __cpuinitdata; |
David Daney | 2c8c53e | 2010-12-27 18:07:57 -0800 | [diff] [blame] | 404 | enum vmalloc64_mode {not_refill, refill_scratch, refill_noscratch}; |
David Daney | 3d8bfdd | 2010-12-21 14:19:11 -0800 | [diff] [blame] | 405 | |
David Daney | bf28607 | 2011-07-05 16:34:46 -0700 | [diff] [blame] | 406 | static struct work_registers __cpuinit build_get_work_registers(u32 **p) |
| 407 | { |
| 408 | struct work_registers r; |
| 409 | |
| 410 | int smp_processor_id_reg; |
| 411 | int smp_processor_id_sel; |
| 412 | int smp_processor_id_shift; |
| 413 | |
| 414 | if (scratch_reg > 0) { |
| 415 | /* Save in CPU local C0_KScratch? */ |
| 416 | UASM_i_MTC0(p, 1, 31, scratch_reg); |
| 417 | r.r1 = K0; |
| 418 | r.r2 = K1; |
| 419 | r.r3 = 1; |
| 420 | return r; |
| 421 | } |
| 422 | |
| 423 | if (num_possible_cpus() > 1) { |
| 424 | #ifdef CONFIG_MIPS_PGD_C0_CONTEXT |
| 425 | smp_processor_id_shift = 51; |
| 426 | smp_processor_id_reg = 20; /* XContext */ |
| 427 | smp_processor_id_sel = 0; |
| 428 | #else |
| 429 | # ifdef CONFIG_32BIT |
| 430 | smp_processor_id_shift = 25; |
| 431 | smp_processor_id_reg = 4; /* Context */ |
| 432 | smp_processor_id_sel = 0; |
| 433 | # endif |
| 434 | # ifdef CONFIG_64BIT |
| 435 | smp_processor_id_shift = 26; |
| 436 | smp_processor_id_reg = 4; /* Context */ |
| 437 | smp_processor_id_sel = 0; |
| 438 | # endif |
| 439 | #endif |
| 440 | /* Get smp_processor_id */ |
| 441 | UASM_i_MFC0(p, K0, smp_processor_id_reg, smp_processor_id_sel); |
| 442 | UASM_i_SRL_SAFE(p, K0, K0, smp_processor_id_shift); |
| 443 | |
| 444 | /* handler_reg_save index in K0 */ |
| 445 | UASM_i_SLL(p, K0, K0, ilog2(sizeof(struct tlb_reg_save))); |
| 446 | |
| 447 | UASM_i_LA(p, K1, (long)&handler_reg_save); |
| 448 | UASM_i_ADDU(p, K0, K0, K1); |
| 449 | } else { |
| 450 | UASM_i_LA(p, K0, (long)&handler_reg_save); |
| 451 | } |
| 452 | /* K0 now points to save area, save $1 and $2 */ |
| 453 | UASM_i_SW(p, 1, offsetof(struct tlb_reg_save, a), K0); |
| 454 | UASM_i_SW(p, 2, offsetof(struct tlb_reg_save, b), K0); |
| 455 | |
| 456 | r.r1 = K1; |
| 457 | r.r2 = 1; |
| 458 | r.r3 = 2; |
| 459 | return r; |
| 460 | } |
| 461 | |
| 462 | static void __cpuinit build_restore_work_registers(u32 **p) |
| 463 | { |
| 464 | if (scratch_reg > 0) { |
| 465 | UASM_i_MFC0(p, 1, 31, scratch_reg); |
| 466 | return; |
| 467 | } |
| 468 | /* K0 already points to save area, restore $1 and $2 */ |
| 469 | UASM_i_LW(p, 1, offsetof(struct tlb_reg_save, a), K0); |
| 470 | UASM_i_LW(p, 2, offsetof(struct tlb_reg_save, b), K0); |
| 471 | } |
| 472 | |
David Daney | 2c8c53e | 2010-12-27 18:07:57 -0800 | [diff] [blame] | 473 | #ifndef CONFIG_MIPS_PGD_C0_CONTEXT |
| 474 | |
David Daney | 82622284 | 2009-10-14 12:16:56 -0700 | [diff] [blame] | 475 | /* |
| 476 | * CONFIG_MIPS_PGD_C0_CONTEXT implies 64 bit and lack of pgd_current, |
| 477 | * we cannot do r3000 under these circumstances. |
David Daney | 3d8bfdd | 2010-12-21 14:19:11 -0800 | [diff] [blame] | 478 | * |
| 479 | * Declare pgd_current here instead of including mmu_context.h to avoid type |
| 480 | * conflicts for tlbmiss_handler_setup_pgd |
David Daney | 82622284 | 2009-10-14 12:16:56 -0700 | [diff] [blame] | 481 | */ |
David Daney | 3d8bfdd | 2010-12-21 14:19:11 -0800 | [diff] [blame] | 482 | extern unsigned long pgd_current[]; |
David Daney | 82622284 | 2009-10-14 12:16:56 -0700 | [diff] [blame] | 483 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 484 | /* |
| 485 | * The R3000 TLB handler is simple. |
| 486 | */ |
Ralf Baechle | 234fcd1 | 2008-03-08 09:56:28 +0000 | [diff] [blame] | 487 | static void __cpuinit build_r3000_tlb_refill_handler(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 488 | { |
| 489 | long pgdc = (long)pgd_current; |
| 490 | u32 *p; |
| 491 | |
| 492 | memset(tlb_handler, 0, sizeof(tlb_handler)); |
| 493 | p = tlb_handler; |
| 494 | |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 495 | uasm_i_mfc0(&p, K0, C0_BADVADDR); |
| 496 | uasm_i_lui(&p, K1, uasm_rel_hi(pgdc)); /* cp0 delay */ |
| 497 | uasm_i_lw(&p, K1, uasm_rel_lo(pgdc), K1); |
| 498 | uasm_i_srl(&p, K0, K0, 22); /* load delay */ |
| 499 | uasm_i_sll(&p, K0, K0, 2); |
| 500 | uasm_i_addu(&p, K1, K1, K0); |
| 501 | uasm_i_mfc0(&p, K0, C0_CONTEXT); |
| 502 | uasm_i_lw(&p, K1, 0, K1); /* cp0 delay */ |
| 503 | uasm_i_andi(&p, K0, K0, 0xffc); /* load delay */ |
| 504 | uasm_i_addu(&p, K1, K1, K0); |
| 505 | uasm_i_lw(&p, K0, 0, K1); |
| 506 | uasm_i_nop(&p); /* load delay */ |
| 507 | uasm_i_mtc0(&p, K0, C0_ENTRYLO0); |
| 508 | uasm_i_mfc0(&p, K1, C0_EPC); /* cp0 delay */ |
| 509 | uasm_i_tlbwr(&p); /* cp0 delay */ |
| 510 | uasm_i_jr(&p, K1); |
| 511 | uasm_i_rfe(&p); /* branch delay */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 512 | |
| 513 | if (p > tlb_handler + 32) |
| 514 | panic("TLB refill handler space exceeded"); |
| 515 | |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 516 | pr_debug("Wrote TLB refill handler (%u instructions).\n", |
| 517 | (unsigned int)(p - tlb_handler)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 518 | |
Ralf Baechle | 91b05e6 | 2006-03-29 18:53:00 +0100 | [diff] [blame] | 519 | memcpy((void *)ebase, tlb_handler, 0x80); |
Franck Bui-Huu | 92b1e6a | 2007-10-18 09:11:17 +0200 | [diff] [blame] | 520 | |
Ralf Baechle | a2c763e | 2012-10-16 22:20:26 +0200 | [diff] [blame] | 521 | dump_handler("r3000_tlb_refill", (u32 *)ebase, 32); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 522 | } |
David Daney | 82622284 | 2009-10-14 12:16:56 -0700 | [diff] [blame] | 523 | #endif /* CONFIG_MIPS_PGD_C0_CONTEXT */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 524 | |
| 525 | /* |
| 526 | * The R4000 TLB handler is much more complicated. We have two |
| 527 | * consecutive handler areas with 32 instructions space each. |
| 528 | * Since they aren't used at the same time, we can overflow in the |
| 529 | * other one.To keep things simple, we first assume linear space, |
| 530 | * then we relocate it to the final handler layout as needed. |
| 531 | */ |
Ralf Baechle | 234fcd1 | 2008-03-08 09:56:28 +0000 | [diff] [blame] | 532 | static u32 final_handler[64] __cpuinitdata; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 533 | |
| 534 | /* |
| 535 | * Hazards |
| 536 | * |
| 537 | * From the IDT errata for the QED RM5230 (Nevada), processor revision 1.0: |
| 538 | * 2. A timing hazard exists for the TLBP instruction. |
| 539 | * |
Ralf Baechle | 7034228 | 2013-01-22 12:59:30 +0100 | [diff] [blame] | 540 | * stalling_instruction |
| 541 | * TLBP |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 542 | * |
| 543 | * The JTLB is being read for the TLBP throughout the stall generated by the |
| 544 | * previous instruction. This is not really correct as the stalling instruction |
| 545 | * can modify the address used to access the JTLB. The failure symptom is that |
| 546 | * the TLBP instruction will use an address created for the stalling instruction |
| 547 | * and not the address held in C0_ENHI and thus report the wrong results. |
| 548 | * |
| 549 | * The software work-around is to not allow the instruction preceding the TLBP |
| 550 | * to stall - make it an NOP or some other instruction guaranteed not to stall. |
| 551 | * |
Ralf Baechle | 7034228 | 2013-01-22 12:59:30 +0100 | [diff] [blame] | 552 | * Errata 2 will not be fixed. This errata is also on the R5000. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 553 | * |
| 554 | * As if we MIPS hackers wouldn't know how to nop pipelines happy ... |
| 555 | */ |
Ralf Baechle | 234fcd1 | 2008-03-08 09:56:28 +0000 | [diff] [blame] | 556 | static void __cpuinit __maybe_unused build_tlb_probe_entry(u32 **p) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 557 | { |
Ralf Baechle | 10cc352 | 2007-10-11 23:46:15 +0100 | [diff] [blame] | 558 | switch (current_cpu_type()) { |
Thomas Bogendoerfer | 326e2e1 | 2008-05-12 13:55:42 +0200 | [diff] [blame] | 559 | /* Found by experiment: R4600 v2.0/R4700 needs this, too. */ |
Thiemo Seufer | f5b4d95 | 2005-09-09 17:11:50 +0000 | [diff] [blame] | 560 | case CPU_R4600: |
Thomas Bogendoerfer | 326e2e1 | 2008-05-12 13:55:42 +0200 | [diff] [blame] | 561 | case CPU_R4700: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 562 | case CPU_R5000: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 563 | case CPU_NEVADA: |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 564 | uasm_i_nop(p); |
| 565 | uasm_i_tlbp(p); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 566 | break; |
| 567 | |
| 568 | default: |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 569 | uasm_i_tlbp(p); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 570 | break; |
| 571 | } |
| 572 | } |
| 573 | |
| 574 | /* |
| 575 | * Write random or indexed TLB entry, and care about the hazards from |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 576 | * the preceding mtc0 and for the following eret. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 577 | */ |
| 578 | enum tlb_write_entry { tlb_random, tlb_indexed }; |
| 579 | |
Ralf Baechle | 234fcd1 | 2008-03-08 09:56:28 +0000 | [diff] [blame] | 580 | static void __cpuinit build_tlb_write_entry(u32 **p, struct uasm_label **l, |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 581 | struct uasm_reloc **r, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 582 | enum tlb_write_entry wmode) |
| 583 | { |
| 584 | void(*tlbw)(u32 **) = NULL; |
| 585 | |
| 586 | switch (wmode) { |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 587 | case tlb_random: tlbw = uasm_i_tlbwr; break; |
| 588 | case tlb_indexed: tlbw = uasm_i_tlbwi; break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 589 | } |
| 590 | |
Ralf Baechle | 161548b | 2008-01-29 10:14:54 +0000 | [diff] [blame] | 591 | if (cpu_has_mips_r2) { |
Steven J. Hill | 625c0a2 | 2012-08-28 23:20:08 -0500 | [diff] [blame] | 592 | /* |
| 593 | * The architecture spec says an ehb is required here, |
| 594 | * but a number of cores do not have the hazard and |
| 595 | * using an ehb causes an expensive pipeline stall. |
| 596 | */ |
| 597 | switch (current_cpu_type()) { |
| 598 | case CPU_M14KC: |
| 599 | case CPU_74K: |
| 600 | break; |
| 601 | |
| 602 | default: |
David Daney | 41f0e4d | 2009-05-12 12:41:53 -0700 | [diff] [blame] | 603 | uasm_i_ehb(p); |
Steven J. Hill | 625c0a2 | 2012-08-28 23:20:08 -0500 | [diff] [blame] | 604 | break; |
| 605 | } |
Ralf Baechle | 161548b | 2008-01-29 10:14:54 +0000 | [diff] [blame] | 606 | tlbw(p); |
| 607 | return; |
| 608 | } |
| 609 | |
Ralf Baechle | 10cc352 | 2007-10-11 23:46:15 +0100 | [diff] [blame] | 610 | switch (current_cpu_type()) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 611 | case CPU_R4000PC: |
| 612 | case CPU_R4000SC: |
| 613 | case CPU_R4000MC: |
| 614 | case CPU_R4400PC: |
| 615 | case CPU_R4400SC: |
| 616 | case CPU_R4400MC: |
| 617 | /* |
| 618 | * This branch uses up a mtc0 hazard nop slot and saves |
| 619 | * two nops after the tlbw instruction. |
| 620 | */ |
Ralf Baechle | 02a5417 | 2012-10-13 22:46:26 +0200 | [diff] [blame] | 621 | uasm_bgezl_hazard(p, r, hazard_instance); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 622 | tlbw(p); |
Ralf Baechle | 02a5417 | 2012-10-13 22:46:26 +0200 | [diff] [blame] | 623 | uasm_bgezl_label(l, p, hazard_instance); |
| 624 | hazard_instance++; |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 625 | uasm_i_nop(p); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 626 | break; |
| 627 | |
| 628 | case CPU_R4600: |
| 629 | case CPU_R4700: |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 630 | uasm_i_nop(p); |
Maciej W. Rozycki | 2c93e12 | 2005-06-30 10:51:01 +0000 | [diff] [blame] | 631 | tlbw(p); |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 632 | uasm_i_nop(p); |
Maciej W. Rozycki | 2c93e12 | 2005-06-30 10:51:01 +0000 | [diff] [blame] | 633 | break; |
| 634 | |
Ralf Baechle | 359187d | 2012-10-16 22:13:06 +0200 | [diff] [blame] | 635 | case CPU_R5000: |
Ralf Baechle | 359187d | 2012-10-16 22:13:06 +0200 | [diff] [blame] | 636 | case CPU_NEVADA: |
| 637 | uasm_i_nop(p); /* QED specifies 2 nops hazard */ |
| 638 | uasm_i_nop(p); /* QED specifies 2 nops hazard */ |
| 639 | tlbw(p); |
| 640 | break; |
| 641 | |
Maciej W. Rozycki | 2c93e12 | 2005-06-30 10:51:01 +0000 | [diff] [blame] | 642 | case CPU_R4300: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 643 | case CPU_5KC: |
| 644 | case CPU_TX49XX: |
Pete Popov | bdf21b1 | 2005-07-14 17:47:57 +0000 | [diff] [blame] | 645 | case CPU_PR4450: |
Jayachandran C | efa0f81 | 2011-05-07 01:36:21 +0530 | [diff] [blame] | 646 | case CPU_XLR: |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 647 | uasm_i_nop(p); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 648 | tlbw(p); |
| 649 | break; |
| 650 | |
| 651 | case CPU_R10000: |
| 652 | case CPU_R12000: |
Kumba | 44d921b | 2006-05-16 22:23:59 -0400 | [diff] [blame] | 653 | case CPU_R14000: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 654 | case CPU_4KC: |
Thomas Bogendoerfer | b1ec4c8 | 2008-03-26 16:42:54 +0100 | [diff] [blame] | 655 | case CPU_4KEC: |
Steven J. Hill | 113c62d | 2012-07-06 23:56:00 +0200 | [diff] [blame] | 656 | case CPU_M14KC: |
Steven J. Hill | f8fa481 | 2012-12-07 03:51:35 +0000 | [diff] [blame] | 657 | case CPU_M14KEC: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 658 | case CPU_SB1: |
Andrew Isaacson | 93ce2f52 | 2005-10-19 23:56:20 -0700 | [diff] [blame] | 659 | case CPU_SB1A: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 660 | case CPU_4KSC: |
| 661 | case CPU_20KC: |
| 662 | case CPU_25KF: |
Kevin Cernekee | 602977b | 2010-10-16 14:22:30 -0700 | [diff] [blame] | 663 | case CPU_BMIPS32: |
| 664 | case CPU_BMIPS3300: |
| 665 | case CPU_BMIPS4350: |
| 666 | case CPU_BMIPS4380: |
| 667 | case CPU_BMIPS5000: |
Fuxin Zhang | 2a21c73 | 2007-06-06 14:52:43 +0800 | [diff] [blame] | 668 | case CPU_LOONGSON2: |
Shinya Kuribayashi | a644b27 | 2009-03-03 18:05:51 +0900 | [diff] [blame] | 669 | case CPU_R5500: |
Maciej W. Rozycki | 8df5bea | 2006-08-23 14:26:50 +0100 | [diff] [blame] | 670 | if (m4kc_tlbp_war()) |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 671 | uasm_i_nop(p); |
Manuel Lauss | 2f794d0 | 2009-03-25 17:49:30 +0100 | [diff] [blame] | 672 | case CPU_ALCHEMY: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 673 | tlbw(p); |
| 674 | break; |
| 675 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 676 | case CPU_RM7000: |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 677 | uasm_i_nop(p); |
| 678 | uasm_i_nop(p); |
| 679 | uasm_i_nop(p); |
| 680 | uasm_i_nop(p); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 681 | tlbw(p); |
| 682 | break; |
| 683 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 684 | case CPU_VR4111: |
| 685 | case CPU_VR4121: |
| 686 | case CPU_VR4122: |
| 687 | case CPU_VR4181: |
| 688 | case CPU_VR4181A: |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 689 | uasm_i_nop(p); |
| 690 | uasm_i_nop(p); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 691 | tlbw(p); |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 692 | uasm_i_nop(p); |
| 693 | uasm_i_nop(p); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 694 | break; |
| 695 | |
| 696 | case CPU_VR4131: |
| 697 | case CPU_VR4133: |
Ralf Baechle | 7623deb | 2005-08-29 16:49:55 +0000 | [diff] [blame] | 698 | case CPU_R5432: |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 699 | uasm_i_nop(p); |
| 700 | uasm_i_nop(p); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 701 | tlbw(p); |
| 702 | break; |
| 703 | |
Lars-Peter Clausen | 83ccf69 | 2010-07-17 11:07:51 +0000 | [diff] [blame] | 704 | case CPU_JZRISC: |
| 705 | tlbw(p); |
| 706 | uasm_i_nop(p); |
| 707 | break; |
| 708 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 709 | default: |
| 710 | panic("No TLB refill handler yet (CPU type: %d)", |
| 711 | current_cpu_data.cputype); |
| 712 | break; |
| 713 | } |
| 714 | } |
| 715 | |
David Daney | 6dd9344 | 2010-02-10 15:12:47 -0800 | [diff] [blame] | 716 | static __cpuinit __maybe_unused void build_convert_pte_to_entrylo(u32 **p, |
| 717 | unsigned int reg) |
| 718 | { |
Steven J. Hill | 05857c6 | 2012-09-13 16:51:46 -0500 | [diff] [blame] | 719 | if (cpu_has_rixi) { |
David Daney | 748e787 | 2012-08-23 10:02:03 -0700 | [diff] [blame] | 720 | UASM_i_ROTR(p, reg, reg, ilog2(_PAGE_GLOBAL)); |
David Daney | 6dd9344 | 2010-02-10 15:12:47 -0800 | [diff] [blame] | 721 | } else { |
| 722 | #ifdef CONFIG_64BIT_PHYS_ADDR |
David Daney | 3be6022 | 2010-04-28 12:16:17 -0700 | [diff] [blame] | 723 | uasm_i_dsrl_safe(p, reg, reg, ilog2(_PAGE_GLOBAL)); |
David Daney | 6dd9344 | 2010-02-10 15:12:47 -0800 | [diff] [blame] | 724 | #else |
| 725 | UASM_i_SRL(p, reg, reg, ilog2(_PAGE_GLOBAL)); |
| 726 | #endif |
| 727 | } |
| 728 | } |
| 729 | |
David Daney | aa1762f | 2012-10-17 00:48:10 +0200 | [diff] [blame] | 730 | #ifdef CONFIG_MIPS_HUGE_TLB_SUPPORT |
David Daney | 6dd9344 | 2010-02-10 15:12:47 -0800 | [diff] [blame] | 731 | |
| 732 | static __cpuinit void build_restore_pagemask(u32 **p, |
| 733 | struct uasm_reloc **r, |
| 734 | unsigned int tmp, |
David Daney | 2c8c53e | 2010-12-27 18:07:57 -0800 | [diff] [blame] | 735 | enum label_id lid, |
| 736 | int restore_scratch) |
David Daney | 6dd9344 | 2010-02-10 15:12:47 -0800 | [diff] [blame] | 737 | { |
David Daney | 2c8c53e | 2010-12-27 18:07:57 -0800 | [diff] [blame] | 738 | if (restore_scratch) { |
| 739 | /* Reset default page size */ |
| 740 | if (PM_DEFAULT_MASK >> 16) { |
| 741 | uasm_i_lui(p, tmp, PM_DEFAULT_MASK >> 16); |
| 742 | uasm_i_ori(p, tmp, tmp, PM_DEFAULT_MASK & 0xffff); |
| 743 | uasm_i_mtc0(p, tmp, C0_PAGEMASK); |
| 744 | uasm_il_b(p, r, lid); |
| 745 | } else if (PM_DEFAULT_MASK) { |
| 746 | uasm_i_ori(p, tmp, 0, PM_DEFAULT_MASK); |
| 747 | uasm_i_mtc0(p, tmp, C0_PAGEMASK); |
| 748 | uasm_il_b(p, r, lid); |
| 749 | } else { |
| 750 | uasm_i_mtc0(p, 0, C0_PAGEMASK); |
| 751 | uasm_il_b(p, r, lid); |
| 752 | } |
| 753 | if (scratch_reg > 0) |
| 754 | UASM_i_MFC0(p, 1, 31, scratch_reg); |
| 755 | else |
| 756 | UASM_i_LW(p, 1, scratchpad_offset(0), 0); |
David Daney | 6dd9344 | 2010-02-10 15:12:47 -0800 | [diff] [blame] | 757 | } else { |
David Daney | 2c8c53e | 2010-12-27 18:07:57 -0800 | [diff] [blame] | 758 | /* Reset default page size */ |
| 759 | if (PM_DEFAULT_MASK >> 16) { |
| 760 | uasm_i_lui(p, tmp, PM_DEFAULT_MASK >> 16); |
| 761 | uasm_i_ori(p, tmp, tmp, PM_DEFAULT_MASK & 0xffff); |
| 762 | uasm_il_b(p, r, lid); |
| 763 | uasm_i_mtc0(p, tmp, C0_PAGEMASK); |
| 764 | } else if (PM_DEFAULT_MASK) { |
| 765 | uasm_i_ori(p, tmp, 0, PM_DEFAULT_MASK); |
| 766 | uasm_il_b(p, r, lid); |
| 767 | uasm_i_mtc0(p, tmp, C0_PAGEMASK); |
| 768 | } else { |
| 769 | uasm_il_b(p, r, lid); |
| 770 | uasm_i_mtc0(p, 0, C0_PAGEMASK); |
| 771 | } |
David Daney | 6dd9344 | 2010-02-10 15:12:47 -0800 | [diff] [blame] | 772 | } |
| 773 | } |
| 774 | |
David Daney | fd062c8 | 2009-05-27 17:47:44 -0700 | [diff] [blame] | 775 | static __cpuinit void build_huge_tlb_write_entry(u32 **p, |
| 776 | struct uasm_label **l, |
| 777 | struct uasm_reloc **r, |
| 778 | unsigned int tmp, |
David Daney | 2c8c53e | 2010-12-27 18:07:57 -0800 | [diff] [blame] | 779 | enum tlb_write_entry wmode, |
| 780 | int restore_scratch) |
David Daney | fd062c8 | 2009-05-27 17:47:44 -0700 | [diff] [blame] | 781 | { |
| 782 | /* Set huge page tlb entry size */ |
| 783 | uasm_i_lui(p, tmp, PM_HUGE_MASK >> 16); |
| 784 | uasm_i_ori(p, tmp, tmp, PM_HUGE_MASK & 0xffff); |
| 785 | uasm_i_mtc0(p, tmp, C0_PAGEMASK); |
| 786 | |
| 787 | build_tlb_write_entry(p, l, r, wmode); |
| 788 | |
David Daney | 2c8c53e | 2010-12-27 18:07:57 -0800 | [diff] [blame] | 789 | build_restore_pagemask(p, r, tmp, label_leave, restore_scratch); |
David Daney | fd062c8 | 2009-05-27 17:47:44 -0700 | [diff] [blame] | 790 | } |
| 791 | |
| 792 | /* |
| 793 | * Check if Huge PTE is present, if so then jump to LABEL. |
| 794 | */ |
| 795 | static void __cpuinit |
| 796 | build_is_huge_pte(u32 **p, struct uasm_reloc **r, unsigned int tmp, |
| 797 | unsigned int pmd, int lid) |
| 798 | { |
| 799 | UASM_i_LW(p, tmp, 0, pmd); |
David Daney | cc33ae4 | 2010-12-20 15:54:50 -0800 | [diff] [blame] | 800 | if (use_bbit_insns()) { |
| 801 | uasm_il_bbit1(p, r, tmp, ilog2(_PAGE_HUGE), lid); |
| 802 | } else { |
| 803 | uasm_i_andi(p, tmp, tmp, _PAGE_HUGE); |
| 804 | uasm_il_bnez(p, r, tmp, lid); |
| 805 | } |
David Daney | fd062c8 | 2009-05-27 17:47:44 -0700 | [diff] [blame] | 806 | } |
| 807 | |
| 808 | static __cpuinit void build_huge_update_entries(u32 **p, |
| 809 | unsigned int pte, |
| 810 | unsigned int tmp) |
| 811 | { |
| 812 | int small_sequence; |
| 813 | |
| 814 | /* |
| 815 | * A huge PTE describes an area the size of the |
| 816 | * configured huge page size. This is twice the |
| 817 | * of the large TLB entry size we intend to use. |
| 818 | * A TLB entry half the size of the configured |
| 819 | * huge page size is configured into entrylo0 |
| 820 | * and entrylo1 to cover the contiguous huge PTE |
| 821 | * address space. |
| 822 | */ |
| 823 | small_sequence = (HPAGE_SIZE >> 7) < 0x10000; |
| 824 | |
Ralf Baechle | 7034228 | 2013-01-22 12:59:30 +0100 | [diff] [blame] | 825 | /* We can clobber tmp. It isn't used after this.*/ |
David Daney | fd062c8 | 2009-05-27 17:47:44 -0700 | [diff] [blame] | 826 | if (!small_sequence) |
| 827 | uasm_i_lui(p, tmp, HPAGE_SIZE >> (7 + 16)); |
| 828 | |
David Daney | 6dd9344 | 2010-02-10 15:12:47 -0800 | [diff] [blame] | 829 | build_convert_pte_to_entrylo(p, pte); |
David Daney | 9b8c389 | 2010-02-10 15:12:44 -0800 | [diff] [blame] | 830 | UASM_i_MTC0(p, pte, C0_ENTRYLO0); /* load it */ |
David Daney | fd062c8 | 2009-05-27 17:47:44 -0700 | [diff] [blame] | 831 | /* convert to entrylo1 */ |
| 832 | if (small_sequence) |
| 833 | UASM_i_ADDIU(p, pte, pte, HPAGE_SIZE >> 7); |
| 834 | else |
| 835 | UASM_i_ADDU(p, pte, pte, tmp); |
| 836 | |
David Daney | 9b8c389 | 2010-02-10 15:12:44 -0800 | [diff] [blame] | 837 | UASM_i_MTC0(p, pte, C0_ENTRYLO1); /* load it */ |
David Daney | fd062c8 | 2009-05-27 17:47:44 -0700 | [diff] [blame] | 838 | } |
| 839 | |
| 840 | static __cpuinit void build_huge_handler_tail(u32 **p, |
| 841 | struct uasm_reloc **r, |
| 842 | struct uasm_label **l, |
| 843 | unsigned int pte, |
| 844 | unsigned int ptr) |
| 845 | { |
| 846 | #ifdef CONFIG_SMP |
| 847 | UASM_i_SC(p, pte, 0, ptr); |
| 848 | uasm_il_beqz(p, r, pte, label_tlb_huge_update); |
| 849 | UASM_i_LW(p, pte, 0, ptr); /* Needed because SC killed our PTE */ |
| 850 | #else |
| 851 | UASM_i_SW(p, pte, 0, ptr); |
| 852 | #endif |
| 853 | build_huge_update_entries(p, pte, ptr); |
David Daney | 2c8c53e | 2010-12-27 18:07:57 -0800 | [diff] [blame] | 854 | build_huge_tlb_write_entry(p, l, r, pte, tlb_indexed, 0); |
David Daney | fd062c8 | 2009-05-27 17:47:44 -0700 | [diff] [blame] | 855 | } |
David Daney | aa1762f | 2012-10-17 00:48:10 +0200 | [diff] [blame] | 856 | #endif /* CONFIG_MIPS_HUGE_TLB_SUPPORT */ |
David Daney | fd062c8 | 2009-05-27 17:47:44 -0700 | [diff] [blame] | 857 | |
Ralf Baechle | 875d43e | 2005-09-03 15:56:16 -0700 | [diff] [blame] | 858 | #ifdef CONFIG_64BIT |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 859 | /* |
| 860 | * TMP and PTR are scratch. |
| 861 | * TMP will be clobbered, PTR will hold the pmd entry. |
| 862 | */ |
Ralf Baechle | 234fcd1 | 2008-03-08 09:56:28 +0000 | [diff] [blame] | 863 | static void __cpuinit |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 864 | build_get_pmde64(u32 **p, struct uasm_label **l, struct uasm_reloc **r, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 865 | unsigned int tmp, unsigned int ptr) |
| 866 | { |
David Daney | 82622284 | 2009-10-14 12:16:56 -0700 | [diff] [blame] | 867 | #ifndef CONFIG_MIPS_PGD_C0_CONTEXT |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 868 | long pgdc = (long)pgd_current; |
David Daney | 82622284 | 2009-10-14 12:16:56 -0700 | [diff] [blame] | 869 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 870 | /* |
| 871 | * The vmalloc handling is not in the hotpath. |
| 872 | */ |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 873 | uasm_i_dmfc0(p, tmp, C0_BADVADDR); |
David Daney | 1ec5632 | 2010-04-28 12:16:18 -0700 | [diff] [blame] | 874 | |
| 875 | if (check_for_high_segbits) { |
| 876 | /* |
| 877 | * The kernel currently implicitely assumes that the |
| 878 | * MIPS SEGBITS parameter for the processor is |
| 879 | * (PGDIR_SHIFT+PGDIR_BITS) or less, and will never |
| 880 | * allocate virtual addresses outside the maximum |
| 881 | * range for SEGBITS = (PGDIR_SHIFT+PGDIR_BITS). But |
| 882 | * that doesn't prevent user code from accessing the |
| 883 | * higher xuseg addresses. Here, we make sure that |
| 884 | * everything but the lower xuseg addresses goes down |
| 885 | * the module_alloc/vmalloc path. |
| 886 | */ |
| 887 | uasm_i_dsrl_safe(p, ptr, tmp, PGDIR_SHIFT + PGD_ORDER + PAGE_SHIFT - 3); |
| 888 | uasm_il_bnez(p, r, ptr, label_vmalloc); |
| 889 | } else { |
| 890 | uasm_il_bltz(p, r, tmp, label_vmalloc); |
| 891 | } |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 892 | /* No uasm_i_nop needed here, since the next insn doesn't touch TMP. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 893 | |
David Daney | 82622284 | 2009-10-14 12:16:56 -0700 | [diff] [blame] | 894 | #ifdef CONFIG_MIPS_PGD_C0_CONTEXT |
David Daney | 3d8bfdd | 2010-12-21 14:19:11 -0800 | [diff] [blame] | 895 | if (pgd_reg != -1) { |
| 896 | /* pgd is in pgd_reg */ |
| 897 | UASM_i_MFC0(p, ptr, 31, pgd_reg); |
| 898 | } else { |
| 899 | /* |
| 900 | * &pgd << 11 stored in CONTEXT [23..63]. |
| 901 | */ |
| 902 | UASM_i_MFC0(p, ptr, C0_CONTEXT); |
| 903 | |
| 904 | /* Clear lower 23 bits of context. */ |
| 905 | uasm_i_dins(p, ptr, 0, 0, 23); |
| 906 | |
Ralf Baechle | 7034228 | 2013-01-22 12:59:30 +0100 | [diff] [blame] | 907 | /* 1 0 1 0 1 << 6 xkphys cached */ |
David Daney | 3d8bfdd | 2010-12-21 14:19:11 -0800 | [diff] [blame] | 908 | uasm_i_ori(p, ptr, ptr, 0x540); |
| 909 | uasm_i_drotr(p, ptr, ptr, 11); |
| 910 | } |
David Daney | 82622284 | 2009-10-14 12:16:56 -0700 | [diff] [blame] | 911 | #elif defined(CONFIG_SMP) |
Ralf Baechle | 7034228 | 2013-01-22 12:59:30 +0100 | [diff] [blame] | 912 | # ifdef CONFIG_MIPS_MT_SMTC |
Ralf Baechle | 41c594a | 2006-04-05 09:45:45 +0100 | [diff] [blame] | 913 | /* |
| 914 | * SMTC uses TCBind value as "CPU" index |
| 915 | */ |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 916 | uasm_i_mfc0(p, ptr, C0_TCBIND); |
David Daney | 3be6022 | 2010-04-28 12:16:17 -0700 | [diff] [blame] | 917 | uasm_i_dsrl_safe(p, ptr, ptr, 19); |
Ralf Baechle | 41c594a | 2006-04-05 09:45:45 +0100 | [diff] [blame] | 918 | # else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 919 | /* |
Thiemo Seufer | 1b3a6e9 | 2005-04-01 14:07:13 +0000 | [diff] [blame] | 920 | * 64 bit SMP running in XKPHYS has smp_processor_id() << 3 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 921 | * stored in CONTEXT. |
| 922 | */ |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 923 | uasm_i_dmfc0(p, ptr, C0_CONTEXT); |
David Daney | 3be6022 | 2010-04-28 12:16:17 -0700 | [diff] [blame] | 924 | uasm_i_dsrl_safe(p, ptr, ptr, 23); |
David Daney | 82622284 | 2009-10-14 12:16:56 -0700 | [diff] [blame] | 925 | # endif |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 926 | UASM_i_LA_mostly(p, tmp, pgdc); |
| 927 | uasm_i_daddu(p, ptr, ptr, tmp); |
| 928 | uasm_i_dmfc0(p, tmp, C0_BADVADDR); |
| 929 | uasm_i_ld(p, ptr, uasm_rel_lo(pgdc), ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 930 | #else |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 931 | UASM_i_LA_mostly(p, ptr, pgdc); |
| 932 | uasm_i_ld(p, ptr, uasm_rel_lo(pgdc), ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 933 | #endif |
| 934 | |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 935 | uasm_l_vmalloc_done(l, *p); |
Ralf Baechle | 242954b | 2006-10-24 02:29:01 +0100 | [diff] [blame] | 936 | |
David Daney | 3be6022 | 2010-04-28 12:16:17 -0700 | [diff] [blame] | 937 | /* get pgd offset in bytes */ |
| 938 | uasm_i_dsrl_safe(p, tmp, tmp, PGDIR_SHIFT - 3); |
Ralf Baechle | 242954b | 2006-10-24 02:29:01 +0100 | [diff] [blame] | 939 | |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 940 | uasm_i_andi(p, tmp, tmp, (PTRS_PER_PGD - 1)<<3); |
| 941 | uasm_i_daddu(p, ptr, ptr, tmp); /* add in pgd offset */ |
David Daney | 325f8a0 | 2009-12-04 13:52:36 -0800 | [diff] [blame] | 942 | #ifndef __PAGETABLE_PMD_FOLDED |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 943 | uasm_i_dmfc0(p, tmp, C0_BADVADDR); /* get faulting address */ |
| 944 | uasm_i_ld(p, ptr, 0, ptr); /* get pmd pointer */ |
David Daney | 3be6022 | 2010-04-28 12:16:17 -0700 | [diff] [blame] | 945 | uasm_i_dsrl_safe(p, tmp, tmp, PMD_SHIFT-3); /* get pmd offset in bytes */ |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 946 | uasm_i_andi(p, tmp, tmp, (PTRS_PER_PMD - 1)<<3); |
| 947 | uasm_i_daddu(p, ptr, ptr, tmp); /* add in pmd offset */ |
David Daney | 325f8a0 | 2009-12-04 13:52:36 -0800 | [diff] [blame] | 948 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 949 | } |
| 950 | |
| 951 | /* |
| 952 | * BVADDR is the faulting address, PTR is scratch. |
| 953 | * PTR will hold the pgd for vmalloc. |
| 954 | */ |
Ralf Baechle | 234fcd1 | 2008-03-08 09:56:28 +0000 | [diff] [blame] | 955 | static void __cpuinit |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 956 | build_get_pgd_vmalloc64(u32 **p, struct uasm_label **l, struct uasm_reloc **r, |
David Daney | 1ec5632 | 2010-04-28 12:16:18 -0700 | [diff] [blame] | 957 | unsigned int bvaddr, unsigned int ptr, |
| 958 | enum vmalloc64_mode mode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 959 | { |
| 960 | long swpd = (long)swapper_pg_dir; |
David Daney | 1ec5632 | 2010-04-28 12:16:18 -0700 | [diff] [blame] | 961 | int single_insn_swpd; |
| 962 | int did_vmalloc_branch = 0; |
| 963 | |
| 964 | single_insn_swpd = uasm_in_compat_space_p(swpd) && !uasm_rel_lo(swpd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 965 | |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 966 | uasm_l_vmalloc(l, *p); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 967 | |
David Daney | 2c8c53e | 2010-12-27 18:07:57 -0800 | [diff] [blame] | 968 | if (mode != not_refill && check_for_high_segbits) { |
David Daney | 1ec5632 | 2010-04-28 12:16:18 -0700 | [diff] [blame] | 969 | if (single_insn_swpd) { |
| 970 | uasm_il_bltz(p, r, bvaddr, label_vmalloc_done); |
| 971 | uasm_i_lui(p, ptr, uasm_rel_hi(swpd)); |
| 972 | did_vmalloc_branch = 1; |
| 973 | /* fall through */ |
| 974 | } else { |
| 975 | uasm_il_bgez(p, r, bvaddr, label_large_segbits_fault); |
| 976 | } |
| 977 | } |
| 978 | if (!did_vmalloc_branch) { |
| 979 | if (uasm_in_compat_space_p(swpd) && !uasm_rel_lo(swpd)) { |
| 980 | uasm_il_b(p, r, label_vmalloc_done); |
| 981 | uasm_i_lui(p, ptr, uasm_rel_hi(swpd)); |
| 982 | } else { |
| 983 | UASM_i_LA_mostly(p, ptr, swpd); |
| 984 | uasm_il_b(p, r, label_vmalloc_done); |
| 985 | if (uasm_in_compat_space_p(swpd)) |
| 986 | uasm_i_addiu(p, ptr, ptr, uasm_rel_lo(swpd)); |
| 987 | else |
| 988 | uasm_i_daddiu(p, ptr, ptr, uasm_rel_lo(swpd)); |
| 989 | } |
| 990 | } |
David Daney | 2c8c53e | 2010-12-27 18:07:57 -0800 | [diff] [blame] | 991 | if (mode != not_refill && check_for_high_segbits) { |
David Daney | 1ec5632 | 2010-04-28 12:16:18 -0700 | [diff] [blame] | 992 | uasm_l_large_segbits_fault(l, *p); |
| 993 | /* |
| 994 | * We get here if we are an xsseg address, or if we are |
| 995 | * an xuseg address above (PGDIR_SHIFT+PGDIR_BITS) boundary. |
| 996 | * |
| 997 | * Ignoring xsseg (assume disabled so would generate |
| 998 | * (address errors?), the only remaining possibility |
| 999 | * is the upper xuseg addresses. On processors with |
| 1000 | * TLB_SEGBITS <= PGDIR_SHIFT+PGDIR_BITS, these |
| 1001 | * addresses would have taken an address error. We try |
| 1002 | * to mimic that here by taking a load/istream page |
| 1003 | * fault. |
| 1004 | */ |
| 1005 | UASM_i_LA(p, ptr, (unsigned long)tlb_do_page_fault_0); |
| 1006 | uasm_i_jr(p, ptr); |
David Daney | 2c8c53e | 2010-12-27 18:07:57 -0800 | [diff] [blame] | 1007 | |
| 1008 | if (mode == refill_scratch) { |
| 1009 | if (scratch_reg > 0) |
| 1010 | UASM_i_MFC0(p, 1, 31, scratch_reg); |
| 1011 | else |
| 1012 | UASM_i_LW(p, 1, scratchpad_offset(0), 0); |
| 1013 | } else { |
| 1014 | uasm_i_nop(p); |
| 1015 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1016 | } |
| 1017 | } |
| 1018 | |
Ralf Baechle | 875d43e | 2005-09-03 15:56:16 -0700 | [diff] [blame] | 1019 | #else /* !CONFIG_64BIT */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1020 | |
| 1021 | /* |
| 1022 | * TMP and PTR are scratch. |
| 1023 | * TMP will be clobbered, PTR will hold the pgd entry. |
| 1024 | */ |
Ralf Baechle | 234fcd1 | 2008-03-08 09:56:28 +0000 | [diff] [blame] | 1025 | static void __cpuinit __maybe_unused |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1026 | build_get_pgde32(u32 **p, unsigned int tmp, unsigned int ptr) |
| 1027 | { |
| 1028 | long pgdc = (long)pgd_current; |
| 1029 | |
| 1030 | /* 32 bit SMP has smp_processor_id() stored in CONTEXT. */ |
| 1031 | #ifdef CONFIG_SMP |
Ralf Baechle | 7034228 | 2013-01-22 12:59:30 +0100 | [diff] [blame] | 1032 | #ifdef CONFIG_MIPS_MT_SMTC |
Ralf Baechle | 41c594a | 2006-04-05 09:45:45 +0100 | [diff] [blame] | 1033 | /* |
| 1034 | * SMTC uses TCBind value as "CPU" index |
| 1035 | */ |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 1036 | uasm_i_mfc0(p, ptr, C0_TCBIND); |
| 1037 | UASM_i_LA_mostly(p, tmp, pgdc); |
| 1038 | uasm_i_srl(p, ptr, ptr, 19); |
Ralf Baechle | 41c594a | 2006-04-05 09:45:45 +0100 | [diff] [blame] | 1039 | #else |
| 1040 | /* |
| 1041 | * smp_processor_id() << 3 is stored in CONTEXT. |
Ralf Baechle | 7034228 | 2013-01-22 12:59:30 +0100 | [diff] [blame] | 1042 | */ |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 1043 | uasm_i_mfc0(p, ptr, C0_CONTEXT); |
| 1044 | UASM_i_LA_mostly(p, tmp, pgdc); |
| 1045 | uasm_i_srl(p, ptr, ptr, 23); |
Ralf Baechle | 41c594a | 2006-04-05 09:45:45 +0100 | [diff] [blame] | 1046 | #endif |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 1047 | uasm_i_addu(p, ptr, tmp, ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1048 | #else |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 1049 | UASM_i_LA_mostly(p, ptr, pgdc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1050 | #endif |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 1051 | uasm_i_mfc0(p, tmp, C0_BADVADDR); /* get faulting address */ |
| 1052 | uasm_i_lw(p, ptr, uasm_rel_lo(pgdc), ptr); |
| 1053 | uasm_i_srl(p, tmp, tmp, PGDIR_SHIFT); /* get pgd only bits */ |
| 1054 | uasm_i_sll(p, tmp, tmp, PGD_T_LOG2); |
| 1055 | uasm_i_addu(p, ptr, ptr, tmp); /* add in pgd offset */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1056 | } |
| 1057 | |
Ralf Baechle | 875d43e | 2005-09-03 15:56:16 -0700 | [diff] [blame] | 1058 | #endif /* !CONFIG_64BIT */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1059 | |
Ralf Baechle | 234fcd1 | 2008-03-08 09:56:28 +0000 | [diff] [blame] | 1060 | static void __cpuinit build_adjust_context(u32 **p, unsigned int ctx) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1061 | { |
Ralf Baechle | 242954b | 2006-10-24 02:29:01 +0100 | [diff] [blame] | 1062 | unsigned int shift = 4 - (PTE_T_LOG2 + 1) + PAGE_SHIFT - 12; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1063 | unsigned int mask = (PTRS_PER_PTE / 2 - 1) << (PTE_T_LOG2 + 1); |
| 1064 | |
Ralf Baechle | 10cc352 | 2007-10-11 23:46:15 +0100 | [diff] [blame] | 1065 | switch (current_cpu_type()) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1066 | case CPU_VR41XX: |
| 1067 | case CPU_VR4111: |
| 1068 | case CPU_VR4121: |
| 1069 | case CPU_VR4122: |
| 1070 | case CPU_VR4131: |
| 1071 | case CPU_VR4181: |
| 1072 | case CPU_VR4181A: |
| 1073 | case CPU_VR4133: |
| 1074 | shift += 2; |
| 1075 | break; |
| 1076 | |
| 1077 | default: |
| 1078 | break; |
| 1079 | } |
| 1080 | |
| 1081 | if (shift) |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 1082 | UASM_i_SRL(p, ctx, ctx, shift); |
| 1083 | uasm_i_andi(p, ctx, ctx, mask); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1084 | } |
| 1085 | |
Ralf Baechle | 234fcd1 | 2008-03-08 09:56:28 +0000 | [diff] [blame] | 1086 | static void __cpuinit build_get_ptep(u32 **p, unsigned int tmp, unsigned int ptr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1087 | { |
| 1088 | /* |
| 1089 | * Bug workaround for the Nevada. It seems as if under certain |
| 1090 | * circumstances the move from cp0_context might produce a |
| 1091 | * bogus result when the mfc0 instruction and its consumer are |
| 1092 | * in a different cacheline or a load instruction, probably any |
| 1093 | * memory reference, is between them. |
| 1094 | */ |
Ralf Baechle | 10cc352 | 2007-10-11 23:46:15 +0100 | [diff] [blame] | 1095 | switch (current_cpu_type()) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1096 | case CPU_NEVADA: |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 1097 | UASM_i_LW(p, ptr, 0, ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1098 | GET_CONTEXT(p, tmp); /* get context reg */ |
| 1099 | break; |
| 1100 | |
| 1101 | default: |
| 1102 | GET_CONTEXT(p, tmp); /* get context reg */ |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 1103 | UASM_i_LW(p, ptr, 0, ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1104 | break; |
| 1105 | } |
| 1106 | |
| 1107 | build_adjust_context(p, tmp); |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 1108 | UASM_i_ADDU(p, ptr, ptr, tmp); /* add in offset */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1109 | } |
| 1110 | |
Ralf Baechle | 234fcd1 | 2008-03-08 09:56:28 +0000 | [diff] [blame] | 1111 | static void __cpuinit build_update_entries(u32 **p, unsigned int tmp, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1112 | unsigned int ptep) |
| 1113 | { |
| 1114 | /* |
| 1115 | * 64bit address support (36bit on a 32bit CPU) in a 32bit |
| 1116 | * Kernel is a special case. Only a few CPUs use it. |
| 1117 | */ |
| 1118 | #ifdef CONFIG_64BIT_PHYS_ADDR |
| 1119 | if (cpu_has_64bits) { |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 1120 | uasm_i_ld(p, tmp, 0, ptep); /* get even pte */ |
| 1121 | uasm_i_ld(p, ptep, sizeof(pte_t), ptep); /* get odd pte */ |
Steven J. Hill | 05857c6 | 2012-09-13 16:51:46 -0500 | [diff] [blame] | 1122 | if (cpu_has_rixi) { |
David Daney | 748e787 | 2012-08-23 10:02:03 -0700 | [diff] [blame] | 1123 | UASM_i_ROTR(p, tmp, tmp, ilog2(_PAGE_GLOBAL)); |
David Daney | 6dd9344 | 2010-02-10 15:12:47 -0800 | [diff] [blame] | 1124 | UASM_i_MTC0(p, tmp, C0_ENTRYLO0); /* load it */ |
David Daney | 748e787 | 2012-08-23 10:02:03 -0700 | [diff] [blame] | 1125 | UASM_i_ROTR(p, ptep, ptep, ilog2(_PAGE_GLOBAL)); |
David Daney | 6dd9344 | 2010-02-10 15:12:47 -0800 | [diff] [blame] | 1126 | } else { |
David Daney | 3be6022 | 2010-04-28 12:16:17 -0700 | [diff] [blame] | 1127 | uasm_i_dsrl_safe(p, tmp, tmp, ilog2(_PAGE_GLOBAL)); /* convert to entrylo0 */ |
David Daney | 6dd9344 | 2010-02-10 15:12:47 -0800 | [diff] [blame] | 1128 | UASM_i_MTC0(p, tmp, C0_ENTRYLO0); /* load it */ |
David Daney | 3be6022 | 2010-04-28 12:16:17 -0700 | [diff] [blame] | 1129 | uasm_i_dsrl_safe(p, ptep, ptep, ilog2(_PAGE_GLOBAL)); /* convert to entrylo1 */ |
David Daney | 6dd9344 | 2010-02-10 15:12:47 -0800 | [diff] [blame] | 1130 | } |
David Daney | 9b8c389 | 2010-02-10 15:12:44 -0800 | [diff] [blame] | 1131 | UASM_i_MTC0(p, ptep, C0_ENTRYLO1); /* load it */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1132 | } else { |
| 1133 | int pte_off_even = sizeof(pte_t) / 2; |
| 1134 | int pte_off_odd = pte_off_even + sizeof(pte_t); |
| 1135 | |
| 1136 | /* The pte entries are pre-shifted */ |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 1137 | uasm_i_lw(p, tmp, pte_off_even, ptep); /* get even pte */ |
David Daney | 9b8c389 | 2010-02-10 15:12:44 -0800 | [diff] [blame] | 1138 | UASM_i_MTC0(p, tmp, C0_ENTRYLO0); /* load it */ |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 1139 | uasm_i_lw(p, ptep, pte_off_odd, ptep); /* get odd pte */ |
David Daney | 9b8c389 | 2010-02-10 15:12:44 -0800 | [diff] [blame] | 1140 | UASM_i_MTC0(p, ptep, C0_ENTRYLO1); /* load it */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1141 | } |
| 1142 | #else |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 1143 | UASM_i_LW(p, tmp, 0, ptep); /* get even pte */ |
| 1144 | UASM_i_LW(p, ptep, sizeof(pte_t), ptep); /* get odd pte */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1145 | if (r45k_bvahwbug()) |
| 1146 | build_tlb_probe_entry(p); |
Steven J. Hill | 05857c6 | 2012-09-13 16:51:46 -0500 | [diff] [blame] | 1147 | if (cpu_has_rixi) { |
David Daney | 748e787 | 2012-08-23 10:02:03 -0700 | [diff] [blame] | 1148 | UASM_i_ROTR(p, tmp, tmp, ilog2(_PAGE_GLOBAL)); |
David Daney | 6dd9344 | 2010-02-10 15:12:47 -0800 | [diff] [blame] | 1149 | if (r4k_250MHZhwbug()) |
| 1150 | UASM_i_MTC0(p, 0, C0_ENTRYLO0); |
| 1151 | UASM_i_MTC0(p, tmp, C0_ENTRYLO0); /* load it */ |
David Daney | 748e787 | 2012-08-23 10:02:03 -0700 | [diff] [blame] | 1152 | UASM_i_ROTR(p, ptep, ptep, ilog2(_PAGE_GLOBAL)); |
David Daney | 6dd9344 | 2010-02-10 15:12:47 -0800 | [diff] [blame] | 1153 | } else { |
| 1154 | UASM_i_SRL(p, tmp, tmp, ilog2(_PAGE_GLOBAL)); /* convert to entrylo0 */ |
| 1155 | if (r4k_250MHZhwbug()) |
| 1156 | UASM_i_MTC0(p, 0, C0_ENTRYLO0); |
| 1157 | UASM_i_MTC0(p, tmp, C0_ENTRYLO0); /* load it */ |
| 1158 | UASM_i_SRL(p, ptep, ptep, ilog2(_PAGE_GLOBAL)); /* convert to entrylo1 */ |
| 1159 | if (r45k_bvahwbug()) |
| 1160 | uasm_i_mfc0(p, tmp, C0_INDEX); |
| 1161 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1162 | if (r4k_250MHZhwbug()) |
David Daney | 9b8c389 | 2010-02-10 15:12:44 -0800 | [diff] [blame] | 1163 | UASM_i_MTC0(p, 0, C0_ENTRYLO1); |
| 1164 | UASM_i_MTC0(p, ptep, C0_ENTRYLO1); /* load it */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1165 | #endif |
| 1166 | } |
| 1167 | |
David Daney | 2c8c53e | 2010-12-27 18:07:57 -0800 | [diff] [blame] | 1168 | struct mips_huge_tlb_info { |
| 1169 | int huge_pte; |
| 1170 | int restore_scratch; |
| 1171 | }; |
| 1172 | |
| 1173 | static struct mips_huge_tlb_info __cpuinit |
| 1174 | build_fast_tlb_refill_handler (u32 **p, struct uasm_label **l, |
| 1175 | struct uasm_reloc **r, unsigned int tmp, |
| 1176 | unsigned int ptr, int c0_scratch) |
| 1177 | { |
| 1178 | struct mips_huge_tlb_info rv; |
| 1179 | unsigned int even, odd; |
| 1180 | int vmalloc_branch_delay_filled = 0; |
| 1181 | const int scratch = 1; /* Our extra working register */ |
| 1182 | |
| 1183 | rv.huge_pte = scratch; |
| 1184 | rv.restore_scratch = 0; |
| 1185 | |
| 1186 | if (check_for_high_segbits) { |
| 1187 | UASM_i_MFC0(p, tmp, C0_BADVADDR); |
| 1188 | |
| 1189 | if (pgd_reg != -1) |
| 1190 | UASM_i_MFC0(p, ptr, 31, pgd_reg); |
| 1191 | else |
| 1192 | UASM_i_MFC0(p, ptr, C0_CONTEXT); |
| 1193 | |
| 1194 | if (c0_scratch >= 0) |
| 1195 | UASM_i_MTC0(p, scratch, 31, c0_scratch); |
| 1196 | else |
| 1197 | UASM_i_SW(p, scratch, scratchpad_offset(0), 0); |
| 1198 | |
| 1199 | uasm_i_dsrl_safe(p, scratch, tmp, |
| 1200 | PGDIR_SHIFT + PGD_ORDER + PAGE_SHIFT - 3); |
| 1201 | uasm_il_bnez(p, r, scratch, label_vmalloc); |
| 1202 | |
| 1203 | if (pgd_reg == -1) { |
| 1204 | vmalloc_branch_delay_filled = 1; |
| 1205 | /* Clear lower 23 bits of context. */ |
| 1206 | uasm_i_dins(p, ptr, 0, 0, 23); |
| 1207 | } |
| 1208 | } else { |
| 1209 | if (pgd_reg != -1) |
| 1210 | UASM_i_MFC0(p, ptr, 31, pgd_reg); |
| 1211 | else |
| 1212 | UASM_i_MFC0(p, ptr, C0_CONTEXT); |
| 1213 | |
| 1214 | UASM_i_MFC0(p, tmp, C0_BADVADDR); |
| 1215 | |
| 1216 | if (c0_scratch >= 0) |
| 1217 | UASM_i_MTC0(p, scratch, 31, c0_scratch); |
| 1218 | else |
| 1219 | UASM_i_SW(p, scratch, scratchpad_offset(0), 0); |
| 1220 | |
| 1221 | if (pgd_reg == -1) |
| 1222 | /* Clear lower 23 bits of context. */ |
| 1223 | uasm_i_dins(p, ptr, 0, 0, 23); |
| 1224 | |
| 1225 | uasm_il_bltz(p, r, tmp, label_vmalloc); |
| 1226 | } |
| 1227 | |
| 1228 | if (pgd_reg == -1) { |
| 1229 | vmalloc_branch_delay_filled = 1; |
Ralf Baechle | 7034228 | 2013-01-22 12:59:30 +0100 | [diff] [blame] | 1230 | /* 1 0 1 0 1 << 6 xkphys cached */ |
David Daney | 2c8c53e | 2010-12-27 18:07:57 -0800 | [diff] [blame] | 1231 | uasm_i_ori(p, ptr, ptr, 0x540); |
| 1232 | uasm_i_drotr(p, ptr, ptr, 11); |
| 1233 | } |
| 1234 | |
| 1235 | #ifdef __PAGETABLE_PMD_FOLDED |
| 1236 | #define LOC_PTEP scratch |
| 1237 | #else |
| 1238 | #define LOC_PTEP ptr |
| 1239 | #endif |
| 1240 | |
| 1241 | if (!vmalloc_branch_delay_filled) |
| 1242 | /* get pgd offset in bytes */ |
| 1243 | uasm_i_dsrl_safe(p, scratch, tmp, PGDIR_SHIFT - 3); |
| 1244 | |
| 1245 | uasm_l_vmalloc_done(l, *p); |
| 1246 | |
| 1247 | /* |
Ralf Baechle | 7034228 | 2013-01-22 12:59:30 +0100 | [diff] [blame] | 1248 | * tmp ptr |
| 1249 | * fall-through case = badvaddr *pgd_current |
| 1250 | * vmalloc case = badvaddr swapper_pg_dir |
David Daney | 2c8c53e | 2010-12-27 18:07:57 -0800 | [diff] [blame] | 1251 | */ |
| 1252 | |
| 1253 | if (vmalloc_branch_delay_filled) |
| 1254 | /* get pgd offset in bytes */ |
| 1255 | uasm_i_dsrl_safe(p, scratch, tmp, PGDIR_SHIFT - 3); |
| 1256 | |
| 1257 | #ifdef __PAGETABLE_PMD_FOLDED |
| 1258 | GET_CONTEXT(p, tmp); /* get context reg */ |
| 1259 | #endif |
| 1260 | uasm_i_andi(p, scratch, scratch, (PTRS_PER_PGD - 1) << 3); |
| 1261 | |
| 1262 | if (use_lwx_insns()) { |
| 1263 | UASM_i_LWX(p, LOC_PTEP, scratch, ptr); |
| 1264 | } else { |
| 1265 | uasm_i_daddu(p, ptr, ptr, scratch); /* add in pgd offset */ |
| 1266 | uasm_i_ld(p, LOC_PTEP, 0, ptr); /* get pmd pointer */ |
| 1267 | } |
| 1268 | |
| 1269 | #ifndef __PAGETABLE_PMD_FOLDED |
| 1270 | /* get pmd offset in bytes */ |
| 1271 | uasm_i_dsrl_safe(p, scratch, tmp, PMD_SHIFT - 3); |
| 1272 | uasm_i_andi(p, scratch, scratch, (PTRS_PER_PMD - 1) << 3); |
| 1273 | GET_CONTEXT(p, tmp); /* get context reg */ |
| 1274 | |
| 1275 | if (use_lwx_insns()) { |
| 1276 | UASM_i_LWX(p, scratch, scratch, ptr); |
| 1277 | } else { |
| 1278 | uasm_i_daddu(p, ptr, ptr, scratch); /* add in pmd offset */ |
| 1279 | UASM_i_LW(p, scratch, 0, ptr); |
| 1280 | } |
| 1281 | #endif |
| 1282 | /* Adjust the context during the load latency. */ |
| 1283 | build_adjust_context(p, tmp); |
| 1284 | |
David Daney | aa1762f | 2012-10-17 00:48:10 +0200 | [diff] [blame] | 1285 | #ifdef CONFIG_MIPS_HUGE_TLB_SUPPORT |
David Daney | 2c8c53e | 2010-12-27 18:07:57 -0800 | [diff] [blame] | 1286 | uasm_il_bbit1(p, r, scratch, ilog2(_PAGE_HUGE), label_tlb_huge_update); |
| 1287 | /* |
| 1288 | * The in the LWX case we don't want to do the load in the |
Ralf Baechle | 7034228 | 2013-01-22 12:59:30 +0100 | [diff] [blame] | 1289 | * delay slot. It cannot issue in the same cycle and may be |
David Daney | 2c8c53e | 2010-12-27 18:07:57 -0800 | [diff] [blame] | 1290 | * speculative and unneeded. |
| 1291 | */ |
| 1292 | if (use_lwx_insns()) |
| 1293 | uasm_i_nop(p); |
David Daney | aa1762f | 2012-10-17 00:48:10 +0200 | [diff] [blame] | 1294 | #endif /* CONFIG_MIPS_HUGE_TLB_SUPPORT */ |
David Daney | 2c8c53e | 2010-12-27 18:07:57 -0800 | [diff] [blame] | 1295 | |
| 1296 | |
| 1297 | /* build_update_entries */ |
| 1298 | if (use_lwx_insns()) { |
| 1299 | even = ptr; |
| 1300 | odd = tmp; |
| 1301 | UASM_i_LWX(p, even, scratch, tmp); |
| 1302 | UASM_i_ADDIU(p, tmp, tmp, sizeof(pte_t)); |
| 1303 | UASM_i_LWX(p, odd, scratch, tmp); |
| 1304 | } else { |
| 1305 | UASM_i_ADDU(p, ptr, scratch, tmp); /* add in offset */ |
| 1306 | even = tmp; |
| 1307 | odd = ptr; |
| 1308 | UASM_i_LW(p, even, 0, ptr); /* get even pte */ |
| 1309 | UASM_i_LW(p, odd, sizeof(pte_t), ptr); /* get odd pte */ |
| 1310 | } |
Steven J. Hill | 05857c6 | 2012-09-13 16:51:46 -0500 | [diff] [blame] | 1311 | if (cpu_has_rixi) { |
David Daney | 748e787 | 2012-08-23 10:02:03 -0700 | [diff] [blame] | 1312 | uasm_i_drotr(p, even, even, ilog2(_PAGE_GLOBAL)); |
David Daney | 2c8c53e | 2010-12-27 18:07:57 -0800 | [diff] [blame] | 1313 | UASM_i_MTC0(p, even, C0_ENTRYLO0); /* load it */ |
David Daney | 748e787 | 2012-08-23 10:02:03 -0700 | [diff] [blame] | 1314 | uasm_i_drotr(p, odd, odd, ilog2(_PAGE_GLOBAL)); |
David Daney | 2c8c53e | 2010-12-27 18:07:57 -0800 | [diff] [blame] | 1315 | } else { |
| 1316 | uasm_i_dsrl_safe(p, even, even, ilog2(_PAGE_GLOBAL)); |
| 1317 | UASM_i_MTC0(p, even, C0_ENTRYLO0); /* load it */ |
| 1318 | uasm_i_dsrl_safe(p, odd, odd, ilog2(_PAGE_GLOBAL)); |
| 1319 | } |
| 1320 | UASM_i_MTC0(p, odd, C0_ENTRYLO1); /* load it */ |
| 1321 | |
| 1322 | if (c0_scratch >= 0) { |
| 1323 | UASM_i_MFC0(p, scratch, 31, c0_scratch); |
| 1324 | build_tlb_write_entry(p, l, r, tlb_random); |
| 1325 | uasm_l_leave(l, *p); |
| 1326 | rv.restore_scratch = 1; |
| 1327 | } else if (PAGE_SHIFT == 14 || PAGE_SHIFT == 13) { |
| 1328 | build_tlb_write_entry(p, l, r, tlb_random); |
| 1329 | uasm_l_leave(l, *p); |
| 1330 | UASM_i_LW(p, scratch, scratchpad_offset(0), 0); |
| 1331 | } else { |
| 1332 | UASM_i_LW(p, scratch, scratchpad_offset(0), 0); |
| 1333 | build_tlb_write_entry(p, l, r, tlb_random); |
| 1334 | uasm_l_leave(l, *p); |
| 1335 | rv.restore_scratch = 1; |
| 1336 | } |
| 1337 | |
| 1338 | uasm_i_eret(p); /* return from trap */ |
| 1339 | |
| 1340 | return rv; |
| 1341 | } |
| 1342 | |
David Daney | e6f72d3 | 2009-05-20 11:40:58 -0700 | [diff] [blame] | 1343 | /* |
| 1344 | * For a 64-bit kernel, we are using the 64-bit XTLB refill exception |
| 1345 | * because EXL == 0. If we wrap, we can also use the 32 instruction |
| 1346 | * slots before the XTLB refill exception handler which belong to the |
| 1347 | * unused TLB refill exception. |
| 1348 | */ |
| 1349 | #define MIPS64_REFILL_INSNS 32 |
| 1350 | |
Ralf Baechle | 234fcd1 | 2008-03-08 09:56:28 +0000 | [diff] [blame] | 1351 | static void __cpuinit build_r4000_tlb_refill_handler(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1352 | { |
| 1353 | u32 *p = tlb_handler; |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 1354 | struct uasm_label *l = labels; |
| 1355 | struct uasm_reloc *r = relocs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1356 | u32 *f; |
| 1357 | unsigned int final_len; |
Ralf Baechle | 4a9040f | 2011-03-29 10:54:54 +0200 | [diff] [blame] | 1358 | struct mips_huge_tlb_info htlb_info __maybe_unused; |
| 1359 | enum vmalloc64_mode vmalloc_mode __maybe_unused; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1360 | |
| 1361 | memset(tlb_handler, 0, sizeof(tlb_handler)); |
| 1362 | memset(labels, 0, sizeof(labels)); |
| 1363 | memset(relocs, 0, sizeof(relocs)); |
| 1364 | memset(final_handler, 0, sizeof(final_handler)); |
| 1365 | |
David Daney | 2c8c53e | 2010-12-27 18:07:57 -0800 | [diff] [blame] | 1366 | if ((scratch_reg > 0 || scratchpad_available()) && use_bbit_insns()) { |
| 1367 | htlb_info = build_fast_tlb_refill_handler(&p, &l, &r, K0, K1, |
| 1368 | scratch_reg); |
| 1369 | vmalloc_mode = refill_scratch; |
| 1370 | } else { |
| 1371 | htlb_info.huge_pte = K0; |
| 1372 | htlb_info.restore_scratch = 0; |
| 1373 | vmalloc_mode = refill_noscratch; |
| 1374 | /* |
| 1375 | * create the plain linear handler |
| 1376 | */ |
| 1377 | if (bcm1250_m3_war()) { |
| 1378 | unsigned int segbits = 44; |
| 1379 | |
| 1380 | uasm_i_dmfc0(&p, K0, C0_BADVADDR); |
| 1381 | uasm_i_dmfc0(&p, K1, C0_ENTRYHI); |
| 1382 | uasm_i_xor(&p, K0, K0, K1); |
| 1383 | uasm_i_dsrl_safe(&p, K1, K0, 62); |
| 1384 | uasm_i_dsrl_safe(&p, K0, K0, 12 + 1); |
| 1385 | uasm_i_dsll_safe(&p, K0, K0, 64 + 12 + 1 - segbits); |
| 1386 | uasm_i_or(&p, K0, K0, K1); |
| 1387 | uasm_il_bnez(&p, &r, K0, label_leave); |
| 1388 | /* No need for uasm_i_nop */ |
| 1389 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1390 | |
Ralf Baechle | 875d43e | 2005-09-03 15:56:16 -0700 | [diff] [blame] | 1391 | #ifdef CONFIG_64BIT |
David Daney | 2c8c53e | 2010-12-27 18:07:57 -0800 | [diff] [blame] | 1392 | build_get_pmde64(&p, &l, &r, K0, K1); /* get pmd in K1 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1393 | #else |
David Daney | 2c8c53e | 2010-12-27 18:07:57 -0800 | [diff] [blame] | 1394 | build_get_pgde32(&p, K0, K1); /* get pgd in K1 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1395 | #endif |
| 1396 | |
David Daney | aa1762f | 2012-10-17 00:48:10 +0200 | [diff] [blame] | 1397 | #ifdef CONFIG_MIPS_HUGE_TLB_SUPPORT |
David Daney | 2c8c53e | 2010-12-27 18:07:57 -0800 | [diff] [blame] | 1398 | build_is_huge_pte(&p, &r, K0, K1, label_tlb_huge_update); |
David Daney | fd062c8 | 2009-05-27 17:47:44 -0700 | [diff] [blame] | 1399 | #endif |
| 1400 | |
David Daney | 2c8c53e | 2010-12-27 18:07:57 -0800 | [diff] [blame] | 1401 | build_get_ptep(&p, K0, K1); |
| 1402 | build_update_entries(&p, K0, K1); |
| 1403 | build_tlb_write_entry(&p, &l, &r, tlb_random); |
| 1404 | uasm_l_leave(&l, p); |
| 1405 | uasm_i_eret(&p); /* return from trap */ |
| 1406 | } |
David Daney | aa1762f | 2012-10-17 00:48:10 +0200 | [diff] [blame] | 1407 | #ifdef CONFIG_MIPS_HUGE_TLB_SUPPORT |
David Daney | fd062c8 | 2009-05-27 17:47:44 -0700 | [diff] [blame] | 1408 | uasm_l_tlb_huge_update(&l, p); |
David Daney | 2c8c53e | 2010-12-27 18:07:57 -0800 | [diff] [blame] | 1409 | build_huge_update_entries(&p, htlb_info.huge_pte, K1); |
| 1410 | build_huge_tlb_write_entry(&p, &l, &r, K0, tlb_random, |
| 1411 | htlb_info.restore_scratch); |
David Daney | fd062c8 | 2009-05-27 17:47:44 -0700 | [diff] [blame] | 1412 | #endif |
| 1413 | |
Ralf Baechle | 875d43e | 2005-09-03 15:56:16 -0700 | [diff] [blame] | 1414 | #ifdef CONFIG_64BIT |
David Daney | 2c8c53e | 2010-12-27 18:07:57 -0800 | [diff] [blame] | 1415 | build_get_pgd_vmalloc64(&p, &l, &r, K0, K1, vmalloc_mode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1416 | #endif |
| 1417 | |
| 1418 | /* |
| 1419 | * Overflow check: For the 64bit handler, we need at least one |
| 1420 | * free instruction slot for the wrap-around branch. In worst |
| 1421 | * case, if the intended insertion point is a delay slot, we |
Matt LaPlante | 4b3f686 | 2006-10-03 22:21:02 +0200 | [diff] [blame] | 1422 | * need three, with the second nop'ed and the third being |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1423 | * unused. |
| 1424 | */ |
Fuxin Zhang | 2a21c73 | 2007-06-06 14:52:43 +0800 | [diff] [blame] | 1425 | /* Loongson2 ebase is different than r4k, we have more space */ |
| 1426 | #if defined(CONFIG_32BIT) || defined(CONFIG_CPU_LOONGSON2) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1427 | if ((p - tlb_handler) > 64) |
| 1428 | panic("TLB refill handler space exceeded"); |
| 1429 | #else |
David Daney | e6f72d3 | 2009-05-20 11:40:58 -0700 | [diff] [blame] | 1430 | if (((p - tlb_handler) > (MIPS64_REFILL_INSNS * 2) - 1) |
| 1431 | || (((p - tlb_handler) > (MIPS64_REFILL_INSNS * 2) - 3) |
| 1432 | && uasm_insn_has_bdelay(relocs, |
| 1433 | tlb_handler + MIPS64_REFILL_INSNS - 3))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1434 | panic("TLB refill handler space exceeded"); |
| 1435 | #endif |
| 1436 | |
| 1437 | /* |
| 1438 | * Now fold the handler in the TLB refill handler space. |
| 1439 | */ |
Fuxin Zhang | 2a21c73 | 2007-06-06 14:52:43 +0800 | [diff] [blame] | 1440 | #if defined(CONFIG_32BIT) || defined(CONFIG_CPU_LOONGSON2) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1441 | f = final_handler; |
| 1442 | /* Simplest case, just copy the handler. */ |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 1443 | uasm_copy_handler(relocs, labels, tlb_handler, p, f); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1444 | final_len = p - tlb_handler; |
Ralf Baechle | 875d43e | 2005-09-03 15:56:16 -0700 | [diff] [blame] | 1445 | #else /* CONFIG_64BIT */ |
David Daney | e6f72d3 | 2009-05-20 11:40:58 -0700 | [diff] [blame] | 1446 | f = final_handler + MIPS64_REFILL_INSNS; |
| 1447 | if ((p - tlb_handler) <= MIPS64_REFILL_INSNS) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1448 | /* Just copy the handler. */ |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 1449 | uasm_copy_handler(relocs, labels, tlb_handler, p, f); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1450 | final_len = p - tlb_handler; |
| 1451 | } else { |
David Daney | aa1762f | 2012-10-17 00:48:10 +0200 | [diff] [blame] | 1452 | #ifdef CONFIG_MIPS_HUGE_TLB_SUPPORT |
David Daney | fd062c8 | 2009-05-27 17:47:44 -0700 | [diff] [blame] | 1453 | const enum label_id ls = label_tlb_huge_update; |
David Daney | 95affdd | 2009-05-20 11:40:59 -0700 | [diff] [blame] | 1454 | #else |
| 1455 | const enum label_id ls = label_vmalloc; |
| 1456 | #endif |
| 1457 | u32 *split; |
| 1458 | int ov = 0; |
| 1459 | int i; |
| 1460 | |
| 1461 | for (i = 0; i < ARRAY_SIZE(labels) && labels[i].lab != ls; i++) |
| 1462 | ; |
| 1463 | BUG_ON(i == ARRAY_SIZE(labels)); |
| 1464 | split = labels[i].addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1465 | |
| 1466 | /* |
David Daney | 95affdd | 2009-05-20 11:40:59 -0700 | [diff] [blame] | 1467 | * See if we have overflown one way or the other. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1468 | */ |
David Daney | 95affdd | 2009-05-20 11:40:59 -0700 | [diff] [blame] | 1469 | if (split > tlb_handler + MIPS64_REFILL_INSNS || |
| 1470 | split < p - MIPS64_REFILL_INSNS) |
| 1471 | ov = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1472 | |
David Daney | 95affdd | 2009-05-20 11:40:59 -0700 | [diff] [blame] | 1473 | if (ov) { |
| 1474 | /* |
| 1475 | * Split two instructions before the end. One |
| 1476 | * for the branch and one for the instruction |
| 1477 | * in the delay slot. |
| 1478 | */ |
| 1479 | split = tlb_handler + MIPS64_REFILL_INSNS - 2; |
| 1480 | |
| 1481 | /* |
| 1482 | * If the branch would fall in a delay slot, |
| 1483 | * we must back up an additional instruction |
| 1484 | * so that it is no longer in a delay slot. |
| 1485 | */ |
| 1486 | if (uasm_insn_has_bdelay(relocs, split - 1)) |
| 1487 | split--; |
| 1488 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1489 | /* Copy first part of the handler. */ |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 1490 | uasm_copy_handler(relocs, labels, tlb_handler, split, f); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1491 | f += split - tlb_handler; |
| 1492 | |
David Daney | 95affdd | 2009-05-20 11:40:59 -0700 | [diff] [blame] | 1493 | if (ov) { |
| 1494 | /* Insert branch. */ |
| 1495 | uasm_l_split(&l, final_handler); |
| 1496 | uasm_il_b(&f, &r, label_split); |
| 1497 | if (uasm_insn_has_bdelay(relocs, split)) |
| 1498 | uasm_i_nop(&f); |
| 1499 | else { |
| 1500 | uasm_copy_handler(relocs, labels, |
| 1501 | split, split + 1, f); |
| 1502 | uasm_move_labels(labels, f, f + 1, -1); |
| 1503 | f++; |
| 1504 | split++; |
| 1505 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1506 | } |
| 1507 | |
| 1508 | /* Copy the rest of the handler. */ |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 1509 | uasm_copy_handler(relocs, labels, split, p, final_handler); |
David Daney | e6f72d3 | 2009-05-20 11:40:58 -0700 | [diff] [blame] | 1510 | final_len = (f - (final_handler + MIPS64_REFILL_INSNS)) + |
| 1511 | (p - split); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1512 | } |
Ralf Baechle | 875d43e | 2005-09-03 15:56:16 -0700 | [diff] [blame] | 1513 | #endif /* CONFIG_64BIT */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1514 | |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 1515 | uasm_resolve_relocs(relocs, labels); |
| 1516 | pr_debug("Wrote TLB refill handler (%u instructions).\n", |
| 1517 | final_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1518 | |
Ralf Baechle | 91b05e6 | 2006-03-29 18:53:00 +0100 | [diff] [blame] | 1519 | memcpy((void *)ebase, final_handler, 0x100); |
Franck Bui-Huu | 92b1e6a | 2007-10-18 09:11:17 +0200 | [diff] [blame] | 1520 | |
Ralf Baechle | a2c763e | 2012-10-16 22:20:26 +0200 | [diff] [blame] | 1521 | dump_handler("r4000_tlb_refill", (u32 *)ebase, 64); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1522 | } |
| 1523 | |
| 1524 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1525 | * 128 instructions for the fastpath handler is generous and should |
| 1526 | * never be exceeded. |
| 1527 | */ |
| 1528 | #define FASTPATH_SIZE 128 |
| 1529 | |
Franck Bui-Huu | cbdbe07 | 2007-10-18 09:11:16 +0200 | [diff] [blame] | 1530 | u32 handle_tlbl[FASTPATH_SIZE] __cacheline_aligned; |
| 1531 | u32 handle_tlbs[FASTPATH_SIZE] __cacheline_aligned; |
| 1532 | u32 handle_tlbm[FASTPATH_SIZE] __cacheline_aligned; |
David Daney | 3d8bfdd | 2010-12-21 14:19:11 -0800 | [diff] [blame] | 1533 | #ifdef CONFIG_MIPS_PGD_C0_CONTEXT |
Ralf Baechle | 0bfbf6a | 2013-03-21 11:28:10 +0100 | [diff] [blame] | 1534 | u32 tlbmiss_handler_setup_pgd_array[16] __cacheline_aligned; |
David Daney | 3d8bfdd | 2010-12-21 14:19:11 -0800 | [diff] [blame] | 1535 | |
| 1536 | static void __cpuinit build_r4000_setup_pgd(void) |
| 1537 | { |
| 1538 | const int a0 = 4; |
| 1539 | const int a1 = 5; |
Ralf Baechle | 0bfbf6a | 2013-03-21 11:28:10 +0100 | [diff] [blame] | 1540 | u32 *p = tlbmiss_handler_setup_pgd_array; |
David Daney | 3d8bfdd | 2010-12-21 14:19:11 -0800 | [diff] [blame] | 1541 | struct uasm_label *l = labels; |
| 1542 | struct uasm_reloc *r = relocs; |
| 1543 | |
Ralf Baechle | 0bfbf6a | 2013-03-21 11:28:10 +0100 | [diff] [blame] | 1544 | memset(tlbmiss_handler_setup_pgd_array, 0, sizeof(tlbmiss_handler_setup_pgd_array)); |
David Daney | 3d8bfdd | 2010-12-21 14:19:11 -0800 | [diff] [blame] | 1545 | memset(labels, 0, sizeof(labels)); |
| 1546 | memset(relocs, 0, sizeof(relocs)); |
| 1547 | |
| 1548 | pgd_reg = allocate_kscratch(); |
| 1549 | |
| 1550 | if (pgd_reg == -1) { |
| 1551 | /* PGD << 11 in c0_Context */ |
| 1552 | /* |
| 1553 | * If it is a ckseg0 address, convert to a physical |
| 1554 | * address. Shifting right by 29 and adding 4 will |
| 1555 | * result in zero for these addresses. |
| 1556 | * |
| 1557 | */ |
| 1558 | UASM_i_SRA(&p, a1, a0, 29); |
| 1559 | UASM_i_ADDIU(&p, a1, a1, 4); |
| 1560 | uasm_il_bnez(&p, &r, a1, label_tlbl_goaround1); |
| 1561 | uasm_i_nop(&p); |
| 1562 | uasm_i_dinsm(&p, a0, 0, 29, 64 - 29); |
| 1563 | uasm_l_tlbl_goaround1(&l, p); |
| 1564 | UASM_i_SLL(&p, a0, a0, 11); |
| 1565 | uasm_i_jr(&p, 31); |
| 1566 | UASM_i_MTC0(&p, a0, C0_CONTEXT); |
| 1567 | } else { |
| 1568 | /* PGD in c0_KScratch */ |
| 1569 | uasm_i_jr(&p, 31); |
| 1570 | UASM_i_MTC0(&p, a0, 31, pgd_reg); |
| 1571 | } |
Ralf Baechle | 0bfbf6a | 2013-03-21 11:28:10 +0100 | [diff] [blame] | 1572 | if (p - tlbmiss_handler_setup_pgd_array > ARRAY_SIZE(tlbmiss_handler_setup_pgd_array)) |
| 1573 | panic("tlbmiss_handler_setup_pgd_array space exceeded"); |
David Daney | 3d8bfdd | 2010-12-21 14:19:11 -0800 | [diff] [blame] | 1574 | uasm_resolve_relocs(relocs, labels); |
Ralf Baechle | 0bfbf6a | 2013-03-21 11:28:10 +0100 | [diff] [blame] | 1575 | pr_debug("Wrote tlbmiss_handler_setup_pgd_array (%u instructions).\n", |
| 1576 | (unsigned int)(p - tlbmiss_handler_setup_pgd_array)); |
David Daney | 3d8bfdd | 2010-12-21 14:19:11 -0800 | [diff] [blame] | 1577 | |
Ralf Baechle | a2c763e | 2012-10-16 22:20:26 +0200 | [diff] [blame] | 1578 | dump_handler("tlbmiss_handler", |
Ralf Baechle | 0bfbf6a | 2013-03-21 11:28:10 +0100 | [diff] [blame] | 1579 | tlbmiss_handler_setup_pgd_array, |
| 1580 | ARRAY_SIZE(tlbmiss_handler_setup_pgd_array)); |
David Daney | 3d8bfdd | 2010-12-21 14:19:11 -0800 | [diff] [blame] | 1581 | } |
| 1582 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1583 | |
Ralf Baechle | 234fcd1 | 2008-03-08 09:56:28 +0000 | [diff] [blame] | 1584 | static void __cpuinit |
David Daney | bd1437e | 2009-05-08 15:10:50 -0700 | [diff] [blame] | 1585 | iPTE_LW(u32 **p, unsigned int pte, unsigned int ptr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1586 | { |
| 1587 | #ifdef CONFIG_SMP |
| 1588 | # ifdef CONFIG_64BIT_PHYS_ADDR |
| 1589 | if (cpu_has_64bits) |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 1590 | uasm_i_lld(p, pte, 0, ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1591 | else |
| 1592 | # endif |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 1593 | UASM_i_LL(p, pte, 0, ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1594 | #else |
| 1595 | # ifdef CONFIG_64BIT_PHYS_ADDR |
| 1596 | if (cpu_has_64bits) |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 1597 | uasm_i_ld(p, pte, 0, ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1598 | else |
| 1599 | # endif |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 1600 | UASM_i_LW(p, pte, 0, ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1601 | #endif |
| 1602 | } |
| 1603 | |
Ralf Baechle | 234fcd1 | 2008-03-08 09:56:28 +0000 | [diff] [blame] | 1604 | static void __cpuinit |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 1605 | iPTE_SW(u32 **p, struct uasm_reloc **r, unsigned int pte, unsigned int ptr, |
Thiemo Seufer | 63b2d2f | 2005-04-28 08:52:57 +0000 | [diff] [blame] | 1606 | unsigned int mode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1607 | { |
Thiemo Seufer | 63b2d2f | 2005-04-28 08:52:57 +0000 | [diff] [blame] | 1608 | #ifdef CONFIG_64BIT_PHYS_ADDR |
| 1609 | unsigned int hwmode = mode & (_PAGE_VALID | _PAGE_DIRTY); |
| 1610 | #endif |
| 1611 | |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 1612 | uasm_i_ori(p, pte, pte, mode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1613 | #ifdef CONFIG_SMP |
| 1614 | # ifdef CONFIG_64BIT_PHYS_ADDR |
| 1615 | if (cpu_has_64bits) |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 1616 | uasm_i_scd(p, pte, 0, ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1617 | else |
| 1618 | # endif |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 1619 | UASM_i_SC(p, pte, 0, ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1620 | |
| 1621 | if (r10000_llsc_war()) |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 1622 | uasm_il_beqzl(p, r, pte, label_smp_pgtable_change); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1623 | else |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 1624 | uasm_il_beqz(p, r, pte, label_smp_pgtable_change); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1625 | |
| 1626 | # ifdef CONFIG_64BIT_PHYS_ADDR |
| 1627 | if (!cpu_has_64bits) { |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 1628 | /* no uasm_i_nop needed */ |
| 1629 | uasm_i_ll(p, pte, sizeof(pte_t) / 2, ptr); |
| 1630 | uasm_i_ori(p, pte, pte, hwmode); |
| 1631 | uasm_i_sc(p, pte, sizeof(pte_t) / 2, ptr); |
| 1632 | uasm_il_beqz(p, r, pte, label_smp_pgtable_change); |
| 1633 | /* no uasm_i_nop needed */ |
| 1634 | uasm_i_lw(p, pte, 0, ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1635 | } else |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 1636 | uasm_i_nop(p); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1637 | # else |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 1638 | uasm_i_nop(p); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1639 | # endif |
| 1640 | #else |
| 1641 | # ifdef CONFIG_64BIT_PHYS_ADDR |
| 1642 | if (cpu_has_64bits) |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 1643 | uasm_i_sd(p, pte, 0, ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1644 | else |
| 1645 | # endif |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 1646 | UASM_i_SW(p, pte, 0, ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1647 | |
| 1648 | # ifdef CONFIG_64BIT_PHYS_ADDR |
| 1649 | if (!cpu_has_64bits) { |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 1650 | uasm_i_lw(p, pte, sizeof(pte_t) / 2, ptr); |
| 1651 | uasm_i_ori(p, pte, pte, hwmode); |
| 1652 | uasm_i_sw(p, pte, sizeof(pte_t) / 2, ptr); |
| 1653 | uasm_i_lw(p, pte, 0, ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1654 | } |
| 1655 | # endif |
| 1656 | #endif |
| 1657 | } |
| 1658 | |
| 1659 | /* |
| 1660 | * Check if PTE is present, if not then jump to LABEL. PTR points to |
| 1661 | * the page table where this PTE is located, PTE will be re-loaded |
| 1662 | * with it's original value. |
| 1663 | */ |
Ralf Baechle | 234fcd1 | 2008-03-08 09:56:28 +0000 | [diff] [blame] | 1664 | static void __cpuinit |
David Daney | bd1437e | 2009-05-08 15:10:50 -0700 | [diff] [blame] | 1665 | build_pte_present(u32 **p, struct uasm_reloc **r, |
David Daney | bf28607 | 2011-07-05 16:34:46 -0700 | [diff] [blame] | 1666 | int pte, int ptr, int scratch, enum label_id lid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1667 | { |
David Daney | bf28607 | 2011-07-05 16:34:46 -0700 | [diff] [blame] | 1668 | int t = scratch >= 0 ? scratch : pte; |
| 1669 | |
Steven J. Hill | 05857c6 | 2012-09-13 16:51:46 -0500 | [diff] [blame] | 1670 | if (cpu_has_rixi) { |
David Daney | cc33ae4 | 2010-12-20 15:54:50 -0800 | [diff] [blame] | 1671 | if (use_bbit_insns()) { |
| 1672 | uasm_il_bbit0(p, r, pte, ilog2(_PAGE_PRESENT), lid); |
| 1673 | uasm_i_nop(p); |
| 1674 | } else { |
David Daney | bf28607 | 2011-07-05 16:34:46 -0700 | [diff] [blame] | 1675 | uasm_i_andi(p, t, pte, _PAGE_PRESENT); |
| 1676 | uasm_il_beqz(p, r, t, lid); |
| 1677 | if (pte == t) |
| 1678 | /* You lose the SMP race :-(*/ |
| 1679 | iPTE_LW(p, pte, ptr); |
David Daney | cc33ae4 | 2010-12-20 15:54:50 -0800 | [diff] [blame] | 1680 | } |
David Daney | 6dd9344 | 2010-02-10 15:12:47 -0800 | [diff] [blame] | 1681 | } else { |
David Daney | bf28607 | 2011-07-05 16:34:46 -0700 | [diff] [blame] | 1682 | uasm_i_andi(p, t, pte, _PAGE_PRESENT | _PAGE_READ); |
| 1683 | uasm_i_xori(p, t, t, _PAGE_PRESENT | _PAGE_READ); |
| 1684 | uasm_il_bnez(p, r, t, lid); |
| 1685 | if (pte == t) |
| 1686 | /* You lose the SMP race :-(*/ |
| 1687 | iPTE_LW(p, pte, ptr); |
David Daney | 6dd9344 | 2010-02-10 15:12:47 -0800 | [diff] [blame] | 1688 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1689 | } |
| 1690 | |
| 1691 | /* Make PTE valid, store result in PTR. */ |
Ralf Baechle | 234fcd1 | 2008-03-08 09:56:28 +0000 | [diff] [blame] | 1692 | static void __cpuinit |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 1693 | build_make_valid(u32 **p, struct uasm_reloc **r, unsigned int pte, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1694 | unsigned int ptr) |
| 1695 | { |
Thiemo Seufer | 63b2d2f | 2005-04-28 08:52:57 +0000 | [diff] [blame] | 1696 | unsigned int mode = _PAGE_VALID | _PAGE_ACCESSED; |
| 1697 | |
| 1698 | iPTE_SW(p, r, pte, ptr, mode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1699 | } |
| 1700 | |
| 1701 | /* |
| 1702 | * Check if PTE can be written to, if not branch to LABEL. Regardless |
| 1703 | * restore PTE with value from PTR when done. |
| 1704 | */ |
Ralf Baechle | 234fcd1 | 2008-03-08 09:56:28 +0000 | [diff] [blame] | 1705 | static void __cpuinit |
David Daney | bd1437e | 2009-05-08 15:10:50 -0700 | [diff] [blame] | 1706 | build_pte_writable(u32 **p, struct uasm_reloc **r, |
David Daney | bf28607 | 2011-07-05 16:34:46 -0700 | [diff] [blame] | 1707 | unsigned int pte, unsigned int ptr, int scratch, |
| 1708 | enum label_id lid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1709 | { |
David Daney | bf28607 | 2011-07-05 16:34:46 -0700 | [diff] [blame] | 1710 | int t = scratch >= 0 ? scratch : pte; |
| 1711 | |
| 1712 | uasm_i_andi(p, t, pte, _PAGE_PRESENT | _PAGE_WRITE); |
| 1713 | uasm_i_xori(p, t, t, _PAGE_PRESENT | _PAGE_WRITE); |
| 1714 | uasm_il_bnez(p, r, t, lid); |
| 1715 | if (pte == t) |
| 1716 | /* You lose the SMP race :-(*/ |
David Daney | cc33ae4 | 2010-12-20 15:54:50 -0800 | [diff] [blame] | 1717 | iPTE_LW(p, pte, ptr); |
David Daney | bf28607 | 2011-07-05 16:34:46 -0700 | [diff] [blame] | 1718 | else |
| 1719 | uasm_i_nop(p); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1720 | } |
| 1721 | |
| 1722 | /* Make PTE writable, update software status bits as well, then store |
| 1723 | * at PTR. |
| 1724 | */ |
Ralf Baechle | 234fcd1 | 2008-03-08 09:56:28 +0000 | [diff] [blame] | 1725 | static void __cpuinit |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 1726 | build_make_write(u32 **p, struct uasm_reloc **r, unsigned int pte, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1727 | unsigned int ptr) |
| 1728 | { |
Thiemo Seufer | 63b2d2f | 2005-04-28 08:52:57 +0000 | [diff] [blame] | 1729 | unsigned int mode = (_PAGE_ACCESSED | _PAGE_MODIFIED | _PAGE_VALID |
| 1730 | | _PAGE_DIRTY); |
| 1731 | |
| 1732 | iPTE_SW(p, r, pte, ptr, mode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1733 | } |
| 1734 | |
| 1735 | /* |
| 1736 | * Check if PTE can be modified, if not branch to LABEL. Regardless |
| 1737 | * restore PTE with value from PTR when done. |
| 1738 | */ |
Ralf Baechle | 234fcd1 | 2008-03-08 09:56:28 +0000 | [diff] [blame] | 1739 | static void __cpuinit |
David Daney | bd1437e | 2009-05-08 15:10:50 -0700 | [diff] [blame] | 1740 | build_pte_modifiable(u32 **p, struct uasm_reloc **r, |
David Daney | bf28607 | 2011-07-05 16:34:46 -0700 | [diff] [blame] | 1741 | unsigned int pte, unsigned int ptr, int scratch, |
| 1742 | enum label_id lid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1743 | { |
David Daney | cc33ae4 | 2010-12-20 15:54:50 -0800 | [diff] [blame] | 1744 | if (use_bbit_insns()) { |
| 1745 | uasm_il_bbit0(p, r, pte, ilog2(_PAGE_WRITE), lid); |
| 1746 | uasm_i_nop(p); |
| 1747 | } else { |
David Daney | bf28607 | 2011-07-05 16:34:46 -0700 | [diff] [blame] | 1748 | int t = scratch >= 0 ? scratch : pte; |
| 1749 | uasm_i_andi(p, t, pte, _PAGE_WRITE); |
| 1750 | uasm_il_beqz(p, r, t, lid); |
| 1751 | if (pte == t) |
| 1752 | /* You lose the SMP race :-(*/ |
| 1753 | iPTE_LW(p, pte, ptr); |
David Daney | cc33ae4 | 2010-12-20 15:54:50 -0800 | [diff] [blame] | 1754 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1755 | } |
| 1756 | |
David Daney | 82622284 | 2009-10-14 12:16:56 -0700 | [diff] [blame] | 1757 | #ifndef CONFIG_MIPS_PGD_C0_CONTEXT |
David Daney | 3d8bfdd | 2010-12-21 14:19:11 -0800 | [diff] [blame] | 1758 | |
| 1759 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1760 | /* |
| 1761 | * R3000 style TLB load/store/modify handlers. |
| 1762 | */ |
| 1763 | |
Maciej W. Rozycki | fded2e5 | 2005-06-13 20:24:00 +0000 | [diff] [blame] | 1764 | /* |
| 1765 | * This places the pte into ENTRYLO0 and writes it with tlbwi. |
| 1766 | * Then it returns. |
| 1767 | */ |
Ralf Baechle | 234fcd1 | 2008-03-08 09:56:28 +0000 | [diff] [blame] | 1768 | static void __cpuinit |
Maciej W. Rozycki | fded2e5 | 2005-06-13 20:24:00 +0000 | [diff] [blame] | 1769 | build_r3000_pte_reload_tlbwi(u32 **p, unsigned int pte, unsigned int tmp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1770 | { |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 1771 | uasm_i_mtc0(p, pte, C0_ENTRYLO0); /* cp0 delay */ |
| 1772 | uasm_i_mfc0(p, tmp, C0_EPC); /* cp0 delay */ |
| 1773 | uasm_i_tlbwi(p); |
| 1774 | uasm_i_jr(p, tmp); |
| 1775 | uasm_i_rfe(p); /* branch delay */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1776 | } |
| 1777 | |
| 1778 | /* |
Maciej W. Rozycki | fded2e5 | 2005-06-13 20:24:00 +0000 | [diff] [blame] | 1779 | * This places the pte into ENTRYLO0 and writes it with tlbwi |
| 1780 | * or tlbwr as appropriate. This is because the index register |
| 1781 | * may have the probe fail bit set as a result of a trap on a |
| 1782 | * kseg2 access, i.e. without refill. Then it returns. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1783 | */ |
Ralf Baechle | 234fcd1 | 2008-03-08 09:56:28 +0000 | [diff] [blame] | 1784 | static void __cpuinit |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 1785 | build_r3000_tlb_reload_write(u32 **p, struct uasm_label **l, |
| 1786 | struct uasm_reloc **r, unsigned int pte, |
| 1787 | unsigned int tmp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1788 | { |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 1789 | uasm_i_mfc0(p, tmp, C0_INDEX); |
| 1790 | uasm_i_mtc0(p, pte, C0_ENTRYLO0); /* cp0 delay */ |
| 1791 | uasm_il_bltz(p, r, tmp, label_r3000_write_probe_fail); /* cp0 delay */ |
| 1792 | uasm_i_mfc0(p, tmp, C0_EPC); /* branch delay */ |
| 1793 | uasm_i_tlbwi(p); /* cp0 delay */ |
| 1794 | uasm_i_jr(p, tmp); |
| 1795 | uasm_i_rfe(p); /* branch delay */ |
| 1796 | uasm_l_r3000_write_probe_fail(l, *p); |
| 1797 | uasm_i_tlbwr(p); /* cp0 delay */ |
| 1798 | uasm_i_jr(p, tmp); |
| 1799 | uasm_i_rfe(p); /* branch delay */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1800 | } |
| 1801 | |
Ralf Baechle | 234fcd1 | 2008-03-08 09:56:28 +0000 | [diff] [blame] | 1802 | static void __cpuinit |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1803 | build_r3000_tlbchange_handler_head(u32 **p, unsigned int pte, |
| 1804 | unsigned int ptr) |
| 1805 | { |
| 1806 | long pgdc = (long)pgd_current; |
| 1807 | |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 1808 | uasm_i_mfc0(p, pte, C0_BADVADDR); |
| 1809 | uasm_i_lui(p, ptr, uasm_rel_hi(pgdc)); /* cp0 delay */ |
| 1810 | uasm_i_lw(p, ptr, uasm_rel_lo(pgdc), ptr); |
| 1811 | uasm_i_srl(p, pte, pte, 22); /* load delay */ |
| 1812 | uasm_i_sll(p, pte, pte, 2); |
| 1813 | uasm_i_addu(p, ptr, ptr, pte); |
| 1814 | uasm_i_mfc0(p, pte, C0_CONTEXT); |
| 1815 | uasm_i_lw(p, ptr, 0, ptr); /* cp0 delay */ |
| 1816 | uasm_i_andi(p, pte, pte, 0xffc); /* load delay */ |
| 1817 | uasm_i_addu(p, ptr, ptr, pte); |
| 1818 | uasm_i_lw(p, pte, 0, ptr); |
| 1819 | uasm_i_tlbp(p); /* load delay */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1820 | } |
| 1821 | |
Ralf Baechle | 234fcd1 | 2008-03-08 09:56:28 +0000 | [diff] [blame] | 1822 | static void __cpuinit build_r3000_tlb_load_handler(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1823 | { |
| 1824 | u32 *p = handle_tlbl; |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 1825 | struct uasm_label *l = labels; |
| 1826 | struct uasm_reloc *r = relocs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1827 | |
| 1828 | memset(handle_tlbl, 0, sizeof(handle_tlbl)); |
| 1829 | memset(labels, 0, sizeof(labels)); |
| 1830 | memset(relocs, 0, sizeof(relocs)); |
| 1831 | |
| 1832 | build_r3000_tlbchange_handler_head(&p, K0, K1); |
David Daney | bf28607 | 2011-07-05 16:34:46 -0700 | [diff] [blame] | 1833 | build_pte_present(&p, &r, K0, K1, -1, label_nopage_tlbl); |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 1834 | uasm_i_nop(&p); /* load delay */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1835 | build_make_valid(&p, &r, K0, K1); |
Maciej W. Rozycki | fded2e5 | 2005-06-13 20:24:00 +0000 | [diff] [blame] | 1836 | build_r3000_tlb_reload_write(&p, &l, &r, K0, K1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1837 | |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 1838 | uasm_l_nopage_tlbl(&l, p); |
| 1839 | uasm_i_j(&p, (unsigned long)tlb_do_page_fault_0 & 0x0fffffff); |
| 1840 | uasm_i_nop(&p); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1841 | |
| 1842 | if ((p - handle_tlbl) > FASTPATH_SIZE) |
| 1843 | panic("TLB load handler fastpath space exceeded"); |
| 1844 | |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 1845 | uasm_resolve_relocs(relocs, labels); |
| 1846 | pr_debug("Wrote TLB load handler fastpath (%u instructions).\n", |
| 1847 | (unsigned int)(p - handle_tlbl)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1848 | |
Ralf Baechle | a2c763e | 2012-10-16 22:20:26 +0200 | [diff] [blame] | 1849 | dump_handler("r3000_tlb_load", handle_tlbl, ARRAY_SIZE(handle_tlbl)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1850 | } |
| 1851 | |
Ralf Baechle | 234fcd1 | 2008-03-08 09:56:28 +0000 | [diff] [blame] | 1852 | static void __cpuinit build_r3000_tlb_store_handler(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1853 | { |
| 1854 | u32 *p = handle_tlbs; |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 1855 | struct uasm_label *l = labels; |
| 1856 | struct uasm_reloc *r = relocs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1857 | |
| 1858 | memset(handle_tlbs, 0, sizeof(handle_tlbs)); |
| 1859 | memset(labels, 0, sizeof(labels)); |
| 1860 | memset(relocs, 0, sizeof(relocs)); |
| 1861 | |
| 1862 | build_r3000_tlbchange_handler_head(&p, K0, K1); |
David Daney | bf28607 | 2011-07-05 16:34:46 -0700 | [diff] [blame] | 1863 | build_pte_writable(&p, &r, K0, K1, -1, label_nopage_tlbs); |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 1864 | uasm_i_nop(&p); /* load delay */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1865 | build_make_write(&p, &r, K0, K1); |
Maciej W. Rozycki | fded2e5 | 2005-06-13 20:24:00 +0000 | [diff] [blame] | 1866 | build_r3000_tlb_reload_write(&p, &l, &r, K0, K1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1867 | |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 1868 | uasm_l_nopage_tlbs(&l, p); |
| 1869 | uasm_i_j(&p, (unsigned long)tlb_do_page_fault_1 & 0x0fffffff); |
| 1870 | uasm_i_nop(&p); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1871 | |
| 1872 | if ((p - handle_tlbs) > FASTPATH_SIZE) |
| 1873 | panic("TLB store handler fastpath space exceeded"); |
| 1874 | |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 1875 | uasm_resolve_relocs(relocs, labels); |
| 1876 | pr_debug("Wrote TLB store handler fastpath (%u instructions).\n", |
| 1877 | (unsigned int)(p - handle_tlbs)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1878 | |
Ralf Baechle | a2c763e | 2012-10-16 22:20:26 +0200 | [diff] [blame] | 1879 | dump_handler("r3000_tlb_store", handle_tlbs, ARRAY_SIZE(handle_tlbs)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1880 | } |
| 1881 | |
Ralf Baechle | 234fcd1 | 2008-03-08 09:56:28 +0000 | [diff] [blame] | 1882 | static void __cpuinit build_r3000_tlb_modify_handler(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1883 | { |
| 1884 | u32 *p = handle_tlbm; |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 1885 | struct uasm_label *l = labels; |
| 1886 | struct uasm_reloc *r = relocs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1887 | |
| 1888 | memset(handle_tlbm, 0, sizeof(handle_tlbm)); |
| 1889 | memset(labels, 0, sizeof(labels)); |
| 1890 | memset(relocs, 0, sizeof(relocs)); |
| 1891 | |
| 1892 | build_r3000_tlbchange_handler_head(&p, K0, K1); |
Ralf Baechle | d954ffe | 2011-08-02 22:52:48 +0100 | [diff] [blame] | 1893 | build_pte_modifiable(&p, &r, K0, K1, -1, label_nopage_tlbm); |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 1894 | uasm_i_nop(&p); /* load delay */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1895 | build_make_write(&p, &r, K0, K1); |
Maciej W. Rozycki | fded2e5 | 2005-06-13 20:24:00 +0000 | [diff] [blame] | 1896 | build_r3000_pte_reload_tlbwi(&p, K0, K1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1897 | |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 1898 | uasm_l_nopage_tlbm(&l, p); |
| 1899 | uasm_i_j(&p, (unsigned long)tlb_do_page_fault_1 & 0x0fffffff); |
| 1900 | uasm_i_nop(&p); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1901 | |
| 1902 | if ((p - handle_tlbm) > FASTPATH_SIZE) |
| 1903 | panic("TLB modify handler fastpath space exceeded"); |
| 1904 | |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 1905 | uasm_resolve_relocs(relocs, labels); |
| 1906 | pr_debug("Wrote TLB modify handler fastpath (%u instructions).\n", |
| 1907 | (unsigned int)(p - handle_tlbm)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1908 | |
Ralf Baechle | a2c763e | 2012-10-16 22:20:26 +0200 | [diff] [blame] | 1909 | dump_handler("r3000_tlb_modify", handle_tlbm, ARRAY_SIZE(handle_tlbm)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1910 | } |
David Daney | 82622284 | 2009-10-14 12:16:56 -0700 | [diff] [blame] | 1911 | #endif /* CONFIG_MIPS_PGD_C0_CONTEXT */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1912 | |
| 1913 | /* |
| 1914 | * R4000 style TLB load/store/modify handlers. |
| 1915 | */ |
David Daney | bf28607 | 2011-07-05 16:34:46 -0700 | [diff] [blame] | 1916 | static struct work_registers __cpuinit |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 1917 | build_r4000_tlbchange_handler_head(u32 **p, struct uasm_label **l, |
David Daney | bf28607 | 2011-07-05 16:34:46 -0700 | [diff] [blame] | 1918 | struct uasm_reloc **r) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1919 | { |
David Daney | bf28607 | 2011-07-05 16:34:46 -0700 | [diff] [blame] | 1920 | struct work_registers wr = build_get_work_registers(p); |
| 1921 | |
Ralf Baechle | 875d43e | 2005-09-03 15:56:16 -0700 | [diff] [blame] | 1922 | #ifdef CONFIG_64BIT |
David Daney | bf28607 | 2011-07-05 16:34:46 -0700 | [diff] [blame] | 1923 | build_get_pmde64(p, l, r, wr.r1, wr.r2); /* get pmd in ptr */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1924 | #else |
David Daney | bf28607 | 2011-07-05 16:34:46 -0700 | [diff] [blame] | 1925 | build_get_pgde32(p, wr.r1, wr.r2); /* get pgd in ptr */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1926 | #endif |
| 1927 | |
David Daney | aa1762f | 2012-10-17 00:48:10 +0200 | [diff] [blame] | 1928 | #ifdef CONFIG_MIPS_HUGE_TLB_SUPPORT |
David Daney | fd062c8 | 2009-05-27 17:47:44 -0700 | [diff] [blame] | 1929 | /* |
| 1930 | * For huge tlb entries, pmd doesn't contain an address but |
| 1931 | * instead contains the tlb pte. Check the PAGE_HUGE bit and |
| 1932 | * see if we need to jump to huge tlb processing. |
| 1933 | */ |
David Daney | bf28607 | 2011-07-05 16:34:46 -0700 | [diff] [blame] | 1934 | build_is_huge_pte(p, r, wr.r1, wr.r2, label_tlb_huge_update); |
David Daney | fd062c8 | 2009-05-27 17:47:44 -0700 | [diff] [blame] | 1935 | #endif |
| 1936 | |
David Daney | bf28607 | 2011-07-05 16:34:46 -0700 | [diff] [blame] | 1937 | UASM_i_MFC0(p, wr.r1, C0_BADVADDR); |
| 1938 | UASM_i_LW(p, wr.r2, 0, wr.r2); |
| 1939 | UASM_i_SRL(p, wr.r1, wr.r1, PAGE_SHIFT + PTE_ORDER - PTE_T_LOG2); |
| 1940 | uasm_i_andi(p, wr.r1, wr.r1, (PTRS_PER_PTE - 1) << PTE_T_LOG2); |
| 1941 | UASM_i_ADDU(p, wr.r2, wr.r2, wr.r1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1942 | |
| 1943 | #ifdef CONFIG_SMP |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 1944 | uasm_l_smp_pgtable_change(l, *p); |
| 1945 | #endif |
David Daney | bf28607 | 2011-07-05 16:34:46 -0700 | [diff] [blame] | 1946 | iPTE_LW(p, wr.r1, wr.r2); /* get even pte */ |
Maciej W. Rozycki | 8df5bea | 2006-08-23 14:26:50 +0100 | [diff] [blame] | 1947 | if (!m4kc_tlbp_war()) |
| 1948 | build_tlb_probe_entry(p); |
David Daney | bf28607 | 2011-07-05 16:34:46 -0700 | [diff] [blame] | 1949 | return wr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1950 | } |
| 1951 | |
Ralf Baechle | 234fcd1 | 2008-03-08 09:56:28 +0000 | [diff] [blame] | 1952 | static void __cpuinit |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 1953 | build_r4000_tlbchange_handler_tail(u32 **p, struct uasm_label **l, |
| 1954 | struct uasm_reloc **r, unsigned int tmp, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1955 | unsigned int ptr) |
| 1956 | { |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 1957 | uasm_i_ori(p, ptr, ptr, sizeof(pte_t)); |
| 1958 | uasm_i_xori(p, ptr, ptr, sizeof(pte_t)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1959 | build_update_entries(p, tmp, ptr); |
| 1960 | build_tlb_write_entry(p, l, r, tlb_indexed); |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 1961 | uasm_l_leave(l, *p); |
David Daney | bf28607 | 2011-07-05 16:34:46 -0700 | [diff] [blame] | 1962 | build_restore_work_registers(p); |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 1963 | uasm_i_eret(p); /* return from trap */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1964 | |
Ralf Baechle | 875d43e | 2005-09-03 15:56:16 -0700 | [diff] [blame] | 1965 | #ifdef CONFIG_64BIT |
David Daney | 1ec5632 | 2010-04-28 12:16:18 -0700 | [diff] [blame] | 1966 | build_get_pgd_vmalloc64(p, l, r, tmp, ptr, not_refill); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1967 | #endif |
| 1968 | } |
| 1969 | |
Ralf Baechle | 234fcd1 | 2008-03-08 09:56:28 +0000 | [diff] [blame] | 1970 | static void __cpuinit build_r4000_tlb_load_handler(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1971 | { |
| 1972 | u32 *p = handle_tlbl; |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 1973 | struct uasm_label *l = labels; |
| 1974 | struct uasm_reloc *r = relocs; |
David Daney | bf28607 | 2011-07-05 16:34:46 -0700 | [diff] [blame] | 1975 | struct work_registers wr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1976 | |
| 1977 | memset(handle_tlbl, 0, sizeof(handle_tlbl)); |
| 1978 | memset(labels, 0, sizeof(labels)); |
| 1979 | memset(relocs, 0, sizeof(relocs)); |
| 1980 | |
| 1981 | if (bcm1250_m3_war()) { |
Ralf Baechle | 3d45285 | 2010-03-23 17:56:38 +0100 | [diff] [blame] | 1982 | unsigned int segbits = 44; |
| 1983 | |
| 1984 | uasm_i_dmfc0(&p, K0, C0_BADVADDR); |
| 1985 | uasm_i_dmfc0(&p, K1, C0_ENTRYHI); |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 1986 | uasm_i_xor(&p, K0, K0, K1); |
David Daney | 3be6022 | 2010-04-28 12:16:17 -0700 | [diff] [blame] | 1987 | uasm_i_dsrl_safe(&p, K1, K0, 62); |
| 1988 | uasm_i_dsrl_safe(&p, K0, K0, 12 + 1); |
| 1989 | uasm_i_dsll_safe(&p, K0, K0, 64 + 12 + 1 - segbits); |
Ralf Baechle | 3d45285 | 2010-03-23 17:56:38 +0100 | [diff] [blame] | 1990 | uasm_i_or(&p, K0, K0, K1); |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 1991 | uasm_il_bnez(&p, &r, K0, label_leave); |
| 1992 | /* No need for uasm_i_nop */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1993 | } |
| 1994 | |
David Daney | bf28607 | 2011-07-05 16:34:46 -0700 | [diff] [blame] | 1995 | wr = build_r4000_tlbchange_handler_head(&p, &l, &r); |
| 1996 | build_pte_present(&p, &r, wr.r1, wr.r2, wr.r3, label_nopage_tlbl); |
Maciej W. Rozycki | 8df5bea | 2006-08-23 14:26:50 +0100 | [diff] [blame] | 1997 | if (m4kc_tlbp_war()) |
| 1998 | build_tlb_probe_entry(&p); |
David Daney | 6dd9344 | 2010-02-10 15:12:47 -0800 | [diff] [blame] | 1999 | |
Steven J. Hill | 05857c6 | 2012-09-13 16:51:46 -0500 | [diff] [blame] | 2000 | if (cpu_has_rixi) { |
David Daney | 6dd9344 | 2010-02-10 15:12:47 -0800 | [diff] [blame] | 2001 | /* |
| 2002 | * If the page is not _PAGE_VALID, RI or XI could not |
| 2003 | * have triggered it. Skip the expensive test.. |
| 2004 | */ |
David Daney | cc33ae4 | 2010-12-20 15:54:50 -0800 | [diff] [blame] | 2005 | if (use_bbit_insns()) { |
David Daney | bf28607 | 2011-07-05 16:34:46 -0700 | [diff] [blame] | 2006 | uasm_il_bbit0(&p, &r, wr.r1, ilog2(_PAGE_VALID), |
David Daney | cc33ae4 | 2010-12-20 15:54:50 -0800 | [diff] [blame] | 2007 | label_tlbl_goaround1); |
| 2008 | } else { |
David Daney | bf28607 | 2011-07-05 16:34:46 -0700 | [diff] [blame] | 2009 | uasm_i_andi(&p, wr.r3, wr.r1, _PAGE_VALID); |
| 2010 | uasm_il_beqz(&p, &r, wr.r3, label_tlbl_goaround1); |
David Daney | cc33ae4 | 2010-12-20 15:54:50 -0800 | [diff] [blame] | 2011 | } |
David Daney | 6dd9344 | 2010-02-10 15:12:47 -0800 | [diff] [blame] | 2012 | uasm_i_nop(&p); |
| 2013 | |
| 2014 | uasm_i_tlbr(&p); |
| 2015 | /* Examine entrylo 0 or 1 based on ptr. */ |
David Daney | cc33ae4 | 2010-12-20 15:54:50 -0800 | [diff] [blame] | 2016 | if (use_bbit_insns()) { |
David Daney | bf28607 | 2011-07-05 16:34:46 -0700 | [diff] [blame] | 2017 | uasm_i_bbit0(&p, wr.r2, ilog2(sizeof(pte_t)), 8); |
David Daney | cc33ae4 | 2010-12-20 15:54:50 -0800 | [diff] [blame] | 2018 | } else { |
David Daney | bf28607 | 2011-07-05 16:34:46 -0700 | [diff] [blame] | 2019 | uasm_i_andi(&p, wr.r3, wr.r2, sizeof(pte_t)); |
| 2020 | uasm_i_beqz(&p, wr.r3, 8); |
David Daney | cc33ae4 | 2010-12-20 15:54:50 -0800 | [diff] [blame] | 2021 | } |
David Daney | bf28607 | 2011-07-05 16:34:46 -0700 | [diff] [blame] | 2022 | /* load it in the delay slot*/ |
| 2023 | UASM_i_MFC0(&p, wr.r3, C0_ENTRYLO0); |
| 2024 | /* load it if ptr is odd */ |
| 2025 | UASM_i_MFC0(&p, wr.r3, C0_ENTRYLO1); |
David Daney | 6dd9344 | 2010-02-10 15:12:47 -0800 | [diff] [blame] | 2026 | /* |
David Daney | bf28607 | 2011-07-05 16:34:46 -0700 | [diff] [blame] | 2027 | * If the entryLo (now in wr.r3) is valid (bit 1), RI or |
David Daney | 6dd9344 | 2010-02-10 15:12:47 -0800 | [diff] [blame] | 2028 | * XI must have triggered it. |
| 2029 | */ |
David Daney | cc33ae4 | 2010-12-20 15:54:50 -0800 | [diff] [blame] | 2030 | if (use_bbit_insns()) { |
David Daney | bf28607 | 2011-07-05 16:34:46 -0700 | [diff] [blame] | 2031 | uasm_il_bbit1(&p, &r, wr.r3, 1, label_nopage_tlbl); |
| 2032 | uasm_i_nop(&p); |
David Daney | cc33ae4 | 2010-12-20 15:54:50 -0800 | [diff] [blame] | 2033 | uasm_l_tlbl_goaround1(&l, p); |
| 2034 | } else { |
David Daney | bf28607 | 2011-07-05 16:34:46 -0700 | [diff] [blame] | 2035 | uasm_i_andi(&p, wr.r3, wr.r3, 2); |
| 2036 | uasm_il_bnez(&p, &r, wr.r3, label_nopage_tlbl); |
| 2037 | uasm_i_nop(&p); |
David Daney | cc33ae4 | 2010-12-20 15:54:50 -0800 | [diff] [blame] | 2038 | } |
David Daney | bf28607 | 2011-07-05 16:34:46 -0700 | [diff] [blame] | 2039 | uasm_l_tlbl_goaround1(&l, p); |
David Daney | 6dd9344 | 2010-02-10 15:12:47 -0800 | [diff] [blame] | 2040 | } |
David Daney | bf28607 | 2011-07-05 16:34:46 -0700 | [diff] [blame] | 2041 | build_make_valid(&p, &r, wr.r1, wr.r2); |
| 2042 | build_r4000_tlbchange_handler_tail(&p, &l, &r, wr.r1, wr.r2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2043 | |
David Daney | aa1762f | 2012-10-17 00:48:10 +0200 | [diff] [blame] | 2044 | #ifdef CONFIG_MIPS_HUGE_TLB_SUPPORT |
David Daney | fd062c8 | 2009-05-27 17:47:44 -0700 | [diff] [blame] | 2045 | /* |
| 2046 | * This is the entry point when build_r4000_tlbchange_handler_head |
| 2047 | * spots a huge page. |
| 2048 | */ |
| 2049 | uasm_l_tlb_huge_update(&l, p); |
David Daney | bf28607 | 2011-07-05 16:34:46 -0700 | [diff] [blame] | 2050 | iPTE_LW(&p, wr.r1, wr.r2); |
| 2051 | build_pte_present(&p, &r, wr.r1, wr.r2, wr.r3, label_nopage_tlbl); |
David Daney | fd062c8 | 2009-05-27 17:47:44 -0700 | [diff] [blame] | 2052 | build_tlb_probe_entry(&p); |
David Daney | 6dd9344 | 2010-02-10 15:12:47 -0800 | [diff] [blame] | 2053 | |
Steven J. Hill | 05857c6 | 2012-09-13 16:51:46 -0500 | [diff] [blame] | 2054 | if (cpu_has_rixi) { |
David Daney | 6dd9344 | 2010-02-10 15:12:47 -0800 | [diff] [blame] | 2055 | /* |
| 2056 | * If the page is not _PAGE_VALID, RI or XI could not |
| 2057 | * have triggered it. Skip the expensive test.. |
| 2058 | */ |
David Daney | cc33ae4 | 2010-12-20 15:54:50 -0800 | [diff] [blame] | 2059 | if (use_bbit_insns()) { |
David Daney | bf28607 | 2011-07-05 16:34:46 -0700 | [diff] [blame] | 2060 | uasm_il_bbit0(&p, &r, wr.r1, ilog2(_PAGE_VALID), |
David Daney | cc33ae4 | 2010-12-20 15:54:50 -0800 | [diff] [blame] | 2061 | label_tlbl_goaround2); |
| 2062 | } else { |
David Daney | bf28607 | 2011-07-05 16:34:46 -0700 | [diff] [blame] | 2063 | uasm_i_andi(&p, wr.r3, wr.r1, _PAGE_VALID); |
| 2064 | uasm_il_beqz(&p, &r, wr.r3, label_tlbl_goaround2); |
David Daney | cc33ae4 | 2010-12-20 15:54:50 -0800 | [diff] [blame] | 2065 | } |
David Daney | 6dd9344 | 2010-02-10 15:12:47 -0800 | [diff] [blame] | 2066 | uasm_i_nop(&p); |
| 2067 | |
| 2068 | uasm_i_tlbr(&p); |
| 2069 | /* Examine entrylo 0 or 1 based on ptr. */ |
David Daney | cc33ae4 | 2010-12-20 15:54:50 -0800 | [diff] [blame] | 2070 | if (use_bbit_insns()) { |
David Daney | bf28607 | 2011-07-05 16:34:46 -0700 | [diff] [blame] | 2071 | uasm_i_bbit0(&p, wr.r2, ilog2(sizeof(pte_t)), 8); |
David Daney | cc33ae4 | 2010-12-20 15:54:50 -0800 | [diff] [blame] | 2072 | } else { |
David Daney | bf28607 | 2011-07-05 16:34:46 -0700 | [diff] [blame] | 2073 | uasm_i_andi(&p, wr.r3, wr.r2, sizeof(pte_t)); |
| 2074 | uasm_i_beqz(&p, wr.r3, 8); |
David Daney | cc33ae4 | 2010-12-20 15:54:50 -0800 | [diff] [blame] | 2075 | } |
David Daney | bf28607 | 2011-07-05 16:34:46 -0700 | [diff] [blame] | 2076 | /* load it in the delay slot*/ |
| 2077 | UASM_i_MFC0(&p, wr.r3, C0_ENTRYLO0); |
| 2078 | /* load it if ptr is odd */ |
| 2079 | UASM_i_MFC0(&p, wr.r3, C0_ENTRYLO1); |
David Daney | 6dd9344 | 2010-02-10 15:12:47 -0800 | [diff] [blame] | 2080 | /* |
David Daney | bf28607 | 2011-07-05 16:34:46 -0700 | [diff] [blame] | 2081 | * If the entryLo (now in wr.r3) is valid (bit 1), RI or |
David Daney | 6dd9344 | 2010-02-10 15:12:47 -0800 | [diff] [blame] | 2082 | * XI must have triggered it. |
| 2083 | */ |
David Daney | cc33ae4 | 2010-12-20 15:54:50 -0800 | [diff] [blame] | 2084 | if (use_bbit_insns()) { |
David Daney | bf28607 | 2011-07-05 16:34:46 -0700 | [diff] [blame] | 2085 | uasm_il_bbit0(&p, &r, wr.r3, 1, label_tlbl_goaround2); |
David Daney | cc33ae4 | 2010-12-20 15:54:50 -0800 | [diff] [blame] | 2086 | } else { |
David Daney | bf28607 | 2011-07-05 16:34:46 -0700 | [diff] [blame] | 2087 | uasm_i_andi(&p, wr.r3, wr.r3, 2); |
| 2088 | uasm_il_beqz(&p, &r, wr.r3, label_tlbl_goaround2); |
David Daney | cc33ae4 | 2010-12-20 15:54:50 -0800 | [diff] [blame] | 2089 | } |
David Daney | 0f4ccbc | 2011-09-16 18:06:02 -0700 | [diff] [blame] | 2090 | if (PM_DEFAULT_MASK == 0) |
| 2091 | uasm_i_nop(&p); |
David Daney | 6dd9344 | 2010-02-10 15:12:47 -0800 | [diff] [blame] | 2092 | /* |
| 2093 | * We clobbered C0_PAGEMASK, restore it. On the other branch |
| 2094 | * it is restored in build_huge_tlb_write_entry. |
| 2095 | */ |
David Daney | bf28607 | 2011-07-05 16:34:46 -0700 | [diff] [blame] | 2096 | build_restore_pagemask(&p, &r, wr.r3, label_nopage_tlbl, 0); |
David Daney | 6dd9344 | 2010-02-10 15:12:47 -0800 | [diff] [blame] | 2097 | |
| 2098 | uasm_l_tlbl_goaround2(&l, p); |
| 2099 | } |
David Daney | bf28607 | 2011-07-05 16:34:46 -0700 | [diff] [blame] | 2100 | uasm_i_ori(&p, wr.r1, wr.r1, (_PAGE_ACCESSED | _PAGE_VALID)); |
| 2101 | build_huge_handler_tail(&p, &r, &l, wr.r1, wr.r2); |
David Daney | fd062c8 | 2009-05-27 17:47:44 -0700 | [diff] [blame] | 2102 | #endif |
| 2103 | |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 2104 | uasm_l_nopage_tlbl(&l, p); |
David Daney | bf28607 | 2011-07-05 16:34:46 -0700 | [diff] [blame] | 2105 | build_restore_work_registers(&p); |
Steven J. Hill | 2a0b24f | 2013-03-25 12:15:55 -0500 | [diff] [blame] | 2106 | #ifdef CONFIG_CPU_MICROMIPS |
| 2107 | if ((unsigned long)tlb_do_page_fault_0 & 1) { |
| 2108 | uasm_i_lui(&p, K0, uasm_rel_hi((long)tlb_do_page_fault_0)); |
| 2109 | uasm_i_addiu(&p, K0, K0, uasm_rel_lo((long)tlb_do_page_fault_0)); |
| 2110 | uasm_i_jr(&p, K0); |
| 2111 | } else |
| 2112 | #endif |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 2113 | uasm_i_j(&p, (unsigned long)tlb_do_page_fault_0 & 0x0fffffff); |
| 2114 | uasm_i_nop(&p); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2115 | |
| 2116 | if ((p - handle_tlbl) > FASTPATH_SIZE) |
| 2117 | panic("TLB load handler fastpath space exceeded"); |
| 2118 | |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 2119 | uasm_resolve_relocs(relocs, labels); |
| 2120 | pr_debug("Wrote TLB load handler fastpath (%u instructions).\n", |
| 2121 | (unsigned int)(p - handle_tlbl)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2122 | |
Ralf Baechle | a2c763e | 2012-10-16 22:20:26 +0200 | [diff] [blame] | 2123 | dump_handler("r4000_tlb_load", handle_tlbl, ARRAY_SIZE(handle_tlbl)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2124 | } |
| 2125 | |
Ralf Baechle | 234fcd1 | 2008-03-08 09:56:28 +0000 | [diff] [blame] | 2126 | static void __cpuinit build_r4000_tlb_store_handler(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2127 | { |
| 2128 | u32 *p = handle_tlbs; |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 2129 | struct uasm_label *l = labels; |
| 2130 | struct uasm_reloc *r = relocs; |
David Daney | bf28607 | 2011-07-05 16:34:46 -0700 | [diff] [blame] | 2131 | struct work_registers wr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2132 | |
| 2133 | memset(handle_tlbs, 0, sizeof(handle_tlbs)); |
| 2134 | memset(labels, 0, sizeof(labels)); |
| 2135 | memset(relocs, 0, sizeof(relocs)); |
| 2136 | |
David Daney | bf28607 | 2011-07-05 16:34:46 -0700 | [diff] [blame] | 2137 | wr = build_r4000_tlbchange_handler_head(&p, &l, &r); |
| 2138 | build_pte_writable(&p, &r, wr.r1, wr.r2, wr.r3, label_nopage_tlbs); |
Maciej W. Rozycki | 8df5bea | 2006-08-23 14:26:50 +0100 | [diff] [blame] | 2139 | if (m4kc_tlbp_war()) |
| 2140 | build_tlb_probe_entry(&p); |
David Daney | bf28607 | 2011-07-05 16:34:46 -0700 | [diff] [blame] | 2141 | build_make_write(&p, &r, wr.r1, wr.r2); |
| 2142 | build_r4000_tlbchange_handler_tail(&p, &l, &r, wr.r1, wr.r2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2143 | |
David Daney | aa1762f | 2012-10-17 00:48:10 +0200 | [diff] [blame] | 2144 | #ifdef CONFIG_MIPS_HUGE_TLB_SUPPORT |
David Daney | fd062c8 | 2009-05-27 17:47:44 -0700 | [diff] [blame] | 2145 | /* |
| 2146 | * This is the entry point when |
| 2147 | * build_r4000_tlbchange_handler_head spots a huge page. |
| 2148 | */ |
| 2149 | uasm_l_tlb_huge_update(&l, p); |
David Daney | bf28607 | 2011-07-05 16:34:46 -0700 | [diff] [blame] | 2150 | iPTE_LW(&p, wr.r1, wr.r2); |
| 2151 | build_pte_writable(&p, &r, wr.r1, wr.r2, wr.r3, label_nopage_tlbs); |
David Daney | fd062c8 | 2009-05-27 17:47:44 -0700 | [diff] [blame] | 2152 | build_tlb_probe_entry(&p); |
David Daney | bf28607 | 2011-07-05 16:34:46 -0700 | [diff] [blame] | 2153 | uasm_i_ori(&p, wr.r1, wr.r1, |
David Daney | fd062c8 | 2009-05-27 17:47:44 -0700 | [diff] [blame] | 2154 | _PAGE_ACCESSED | _PAGE_MODIFIED | _PAGE_VALID | _PAGE_DIRTY); |
David Daney | bf28607 | 2011-07-05 16:34:46 -0700 | [diff] [blame] | 2155 | build_huge_handler_tail(&p, &r, &l, wr.r1, wr.r2); |
David Daney | fd062c8 | 2009-05-27 17:47:44 -0700 | [diff] [blame] | 2156 | #endif |
| 2157 | |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 2158 | uasm_l_nopage_tlbs(&l, p); |
David Daney | bf28607 | 2011-07-05 16:34:46 -0700 | [diff] [blame] | 2159 | build_restore_work_registers(&p); |
Steven J. Hill | 2a0b24f | 2013-03-25 12:15:55 -0500 | [diff] [blame] | 2160 | #ifdef CONFIG_CPU_MICROMIPS |
| 2161 | if ((unsigned long)tlb_do_page_fault_1 & 1) { |
| 2162 | uasm_i_lui(&p, K0, uasm_rel_hi((long)tlb_do_page_fault_1)); |
| 2163 | uasm_i_addiu(&p, K0, K0, uasm_rel_lo((long)tlb_do_page_fault_1)); |
| 2164 | uasm_i_jr(&p, K0); |
| 2165 | } else |
| 2166 | #endif |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 2167 | uasm_i_j(&p, (unsigned long)tlb_do_page_fault_1 & 0x0fffffff); |
| 2168 | uasm_i_nop(&p); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2169 | |
| 2170 | if ((p - handle_tlbs) > FASTPATH_SIZE) |
| 2171 | panic("TLB store handler fastpath space exceeded"); |
| 2172 | |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 2173 | uasm_resolve_relocs(relocs, labels); |
| 2174 | pr_debug("Wrote TLB store handler fastpath (%u instructions).\n", |
| 2175 | (unsigned int)(p - handle_tlbs)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2176 | |
Ralf Baechle | a2c763e | 2012-10-16 22:20:26 +0200 | [diff] [blame] | 2177 | dump_handler("r4000_tlb_store", handle_tlbs, ARRAY_SIZE(handle_tlbs)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2178 | } |
| 2179 | |
Ralf Baechle | 234fcd1 | 2008-03-08 09:56:28 +0000 | [diff] [blame] | 2180 | static void __cpuinit build_r4000_tlb_modify_handler(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2181 | { |
| 2182 | u32 *p = handle_tlbm; |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 2183 | struct uasm_label *l = labels; |
| 2184 | struct uasm_reloc *r = relocs; |
David Daney | bf28607 | 2011-07-05 16:34:46 -0700 | [diff] [blame] | 2185 | struct work_registers wr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2186 | |
| 2187 | memset(handle_tlbm, 0, sizeof(handle_tlbm)); |
| 2188 | memset(labels, 0, sizeof(labels)); |
| 2189 | memset(relocs, 0, sizeof(relocs)); |
| 2190 | |
David Daney | bf28607 | 2011-07-05 16:34:46 -0700 | [diff] [blame] | 2191 | wr = build_r4000_tlbchange_handler_head(&p, &l, &r); |
| 2192 | build_pte_modifiable(&p, &r, wr.r1, wr.r2, wr.r3, label_nopage_tlbm); |
Maciej W. Rozycki | 8df5bea | 2006-08-23 14:26:50 +0100 | [diff] [blame] | 2193 | if (m4kc_tlbp_war()) |
| 2194 | build_tlb_probe_entry(&p); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2195 | /* Present and writable bits set, set accessed and dirty bits. */ |
David Daney | bf28607 | 2011-07-05 16:34:46 -0700 | [diff] [blame] | 2196 | build_make_write(&p, &r, wr.r1, wr.r2); |
| 2197 | build_r4000_tlbchange_handler_tail(&p, &l, &r, wr.r1, wr.r2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2198 | |
David Daney | aa1762f | 2012-10-17 00:48:10 +0200 | [diff] [blame] | 2199 | #ifdef CONFIG_MIPS_HUGE_TLB_SUPPORT |
David Daney | fd062c8 | 2009-05-27 17:47:44 -0700 | [diff] [blame] | 2200 | /* |
| 2201 | * This is the entry point when |
| 2202 | * build_r4000_tlbchange_handler_head spots a huge page. |
| 2203 | */ |
| 2204 | uasm_l_tlb_huge_update(&l, p); |
David Daney | bf28607 | 2011-07-05 16:34:46 -0700 | [diff] [blame] | 2205 | iPTE_LW(&p, wr.r1, wr.r2); |
| 2206 | build_pte_modifiable(&p, &r, wr.r1, wr.r2, wr.r3, label_nopage_tlbm); |
David Daney | fd062c8 | 2009-05-27 17:47:44 -0700 | [diff] [blame] | 2207 | build_tlb_probe_entry(&p); |
David Daney | bf28607 | 2011-07-05 16:34:46 -0700 | [diff] [blame] | 2208 | uasm_i_ori(&p, wr.r1, wr.r1, |
David Daney | fd062c8 | 2009-05-27 17:47:44 -0700 | [diff] [blame] | 2209 | _PAGE_ACCESSED | _PAGE_MODIFIED | _PAGE_VALID | _PAGE_DIRTY); |
David Daney | bf28607 | 2011-07-05 16:34:46 -0700 | [diff] [blame] | 2210 | build_huge_handler_tail(&p, &r, &l, wr.r1, wr.r2); |
David Daney | fd062c8 | 2009-05-27 17:47:44 -0700 | [diff] [blame] | 2211 | #endif |
| 2212 | |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 2213 | uasm_l_nopage_tlbm(&l, p); |
David Daney | bf28607 | 2011-07-05 16:34:46 -0700 | [diff] [blame] | 2214 | build_restore_work_registers(&p); |
Steven J. Hill | 2a0b24f | 2013-03-25 12:15:55 -0500 | [diff] [blame] | 2215 | #ifdef CONFIG_CPU_MICROMIPS |
| 2216 | if ((unsigned long)tlb_do_page_fault_1 & 1) { |
| 2217 | uasm_i_lui(&p, K0, uasm_rel_hi((long)tlb_do_page_fault_1)); |
| 2218 | uasm_i_addiu(&p, K0, K0, uasm_rel_lo((long)tlb_do_page_fault_1)); |
| 2219 | uasm_i_jr(&p, K0); |
| 2220 | } else |
| 2221 | #endif |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 2222 | uasm_i_j(&p, (unsigned long)tlb_do_page_fault_1 & 0x0fffffff); |
| 2223 | uasm_i_nop(&p); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2224 | |
| 2225 | if ((p - handle_tlbm) > FASTPATH_SIZE) |
| 2226 | panic("TLB modify handler fastpath space exceeded"); |
| 2227 | |
Thiemo Seufer | e30ec45 | 2008-01-28 20:05:38 +0000 | [diff] [blame] | 2228 | uasm_resolve_relocs(relocs, labels); |
| 2229 | pr_debug("Wrote TLB modify handler fastpath (%u instructions).\n", |
| 2230 | (unsigned int)(p - handle_tlbm)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2231 | |
Ralf Baechle | a2c763e | 2012-10-16 22:20:26 +0200 | [diff] [blame] | 2232 | dump_handler("r4000_tlb_modify", handle_tlbm, ARRAY_SIZE(handle_tlbm)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2233 | } |
| 2234 | |
Ralf Baechle | 234fcd1 | 2008-03-08 09:56:28 +0000 | [diff] [blame] | 2235 | void __cpuinit build_tlb_refill_handler(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2236 | { |
| 2237 | /* |
| 2238 | * The refill handler is generated per-CPU, multi-node systems |
| 2239 | * may have local storage for it. The other handlers are only |
| 2240 | * needed once. |
| 2241 | */ |
| 2242 | static int run_once = 0; |
| 2243 | |
Ralf Baechle | a2c763e | 2012-10-16 22:20:26 +0200 | [diff] [blame] | 2244 | output_pgtable_bits_defines(); |
| 2245 | |
David Daney | 1ec5632 | 2010-04-28 12:16:18 -0700 | [diff] [blame] | 2246 | #ifdef CONFIG_64BIT |
| 2247 | check_for_high_segbits = current_cpu_data.vmbits > (PGDIR_SHIFT + PGD_ORDER + PAGE_SHIFT - 3); |
| 2248 | #endif |
| 2249 | |
Ralf Baechle | 10cc352 | 2007-10-11 23:46:15 +0100 | [diff] [blame] | 2250 | switch (current_cpu_type()) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2251 | case CPU_R2000: |
| 2252 | case CPU_R3000: |
| 2253 | case CPU_R3000A: |
| 2254 | case CPU_R3081E: |
| 2255 | case CPU_TX3912: |
| 2256 | case CPU_TX3922: |
| 2257 | case CPU_TX3927: |
David Daney | 82622284 | 2009-10-14 12:16:56 -0700 | [diff] [blame] | 2258 | #ifndef CONFIG_MIPS_PGD_C0_CONTEXT |
Steven J. Hill | d532f3d | 2013-03-25 11:58:57 -0500 | [diff] [blame] | 2259 | setup_asid(0x40, 0xfc0, 0xf000, ASID_FIRST_VERSION_R3000); |
Huacai Chen | 8759934 | 2013-03-17 11:49:38 +0000 | [diff] [blame] | 2260 | if (cpu_has_local_ebase) |
| 2261 | build_r3000_tlb_refill_handler(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2262 | if (!run_once) { |
Huacai Chen | 8759934 | 2013-03-17 11:49:38 +0000 | [diff] [blame] | 2263 | if (!cpu_has_local_ebase) |
| 2264 | build_r3000_tlb_refill_handler(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2265 | build_r3000_tlb_load_handler(); |
| 2266 | build_r3000_tlb_store_handler(); |
| 2267 | build_r3000_tlb_modify_handler(); |
| 2268 | run_once++; |
| 2269 | } |
David Daney | 82622284 | 2009-10-14 12:16:56 -0700 | [diff] [blame] | 2270 | #else |
| 2271 | panic("No R3000 TLB refill handler"); |
| 2272 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2273 | break; |
| 2274 | |
| 2275 | case CPU_R6000: |
| 2276 | case CPU_R6000A: |
| 2277 | panic("No R6000 TLB refill handler yet"); |
| 2278 | break; |
| 2279 | |
| 2280 | case CPU_R8000: |
| 2281 | panic("No R8000 TLB refill handler yet"); |
| 2282 | break; |
| 2283 | |
| 2284 | default: |
Steven J. Hill | d532f3d | 2013-03-25 11:58:57 -0500 | [diff] [blame] | 2285 | #ifndef CONFIG_MIPS_MT_SMTC |
| 2286 | setup_asid(0x1, 0xff, 0xff00, ASID_FIRST_VERSION_R4000); |
| 2287 | #else |
| 2288 | setup_asid(0x1, smtc_asid_mask, 0xff00, ASID_FIRST_VERSION_R4000); |
| 2289 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2290 | if (!run_once) { |
David Daney | bf28607 | 2011-07-05 16:34:46 -0700 | [diff] [blame] | 2291 | scratch_reg = allocate_kscratch(); |
David Daney | 3d8bfdd | 2010-12-21 14:19:11 -0800 | [diff] [blame] | 2292 | #ifdef CONFIG_MIPS_PGD_C0_CONTEXT |
| 2293 | build_r4000_setup_pgd(); |
| 2294 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2295 | build_r4000_tlb_load_handler(); |
| 2296 | build_r4000_tlb_store_handler(); |
| 2297 | build_r4000_tlb_modify_handler(); |
Huacai Chen | 8759934 | 2013-03-17 11:49:38 +0000 | [diff] [blame] | 2298 | if (!cpu_has_local_ebase) |
| 2299 | build_r4000_tlb_refill_handler(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2300 | run_once++; |
| 2301 | } |
Huacai Chen | 8759934 | 2013-03-17 11:49:38 +0000 | [diff] [blame] | 2302 | if (cpu_has_local_ebase) |
| 2303 | build_r4000_tlb_refill_handler(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2304 | } |
| 2305 | } |
Ralf Baechle | 1d40cfc | 2005-07-15 15:23:23 +0000 | [diff] [blame] | 2306 | |
Ralf Baechle | 234fcd1 | 2008-03-08 09:56:28 +0000 | [diff] [blame] | 2307 | void __cpuinit flush_tlb_handlers(void) |
Ralf Baechle | 1d40cfc | 2005-07-15 15:23:23 +0000 | [diff] [blame] | 2308 | { |
Thomas Bogendoerfer | e0cee3e | 2008-08-04 20:53:57 +0200 | [diff] [blame] | 2309 | local_flush_icache_range((unsigned long)handle_tlbl, |
Ralf Baechle | 1d40cfc | 2005-07-15 15:23:23 +0000 | [diff] [blame] | 2310 | (unsigned long)handle_tlbl + sizeof(handle_tlbl)); |
Thomas Bogendoerfer | e0cee3e | 2008-08-04 20:53:57 +0200 | [diff] [blame] | 2311 | local_flush_icache_range((unsigned long)handle_tlbs, |
Ralf Baechle | 1d40cfc | 2005-07-15 15:23:23 +0000 | [diff] [blame] | 2312 | (unsigned long)handle_tlbs + sizeof(handle_tlbs)); |
Thomas Bogendoerfer | e0cee3e | 2008-08-04 20:53:57 +0200 | [diff] [blame] | 2313 | local_flush_icache_range((unsigned long)handle_tlbm, |
Ralf Baechle | 1d40cfc | 2005-07-15 15:23:23 +0000 | [diff] [blame] | 2314 | (unsigned long)handle_tlbm + sizeof(handle_tlbm)); |
David Daney | 3d8bfdd | 2010-12-21 14:19:11 -0800 | [diff] [blame] | 2315 | #ifdef CONFIG_MIPS_PGD_C0_CONTEXT |
Ralf Baechle | 0bfbf6a | 2013-03-21 11:28:10 +0100 | [diff] [blame] | 2316 | local_flush_icache_range((unsigned long)tlbmiss_handler_setup_pgd_array, |
| 2317 | (unsigned long)tlbmiss_handler_setup_pgd_array + sizeof(handle_tlbm)); |
David Daney | 3d8bfdd | 2010-12-21 14:19:11 -0800 | [diff] [blame] | 2318 | #endif |
Ralf Baechle | 1d40cfc | 2005-07-15 15:23:23 +0000 | [diff] [blame] | 2319 | } |