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 | * |
Justin P. Mattock | 79add62 | 2011-04-04 14:15:29 -0700 | [diff] [blame] | 6 | * Copyright (C) 1996 David S. Miller (davem@davemloft.net) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | * Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Ralf Baechle (ralf@gnu.org) |
| 8 | * Copyright (C) 1999, 2000 Silicon Graphics, Inc. |
| 9 | */ |
Ralf Baechle | a754f70 | 2007-11-03 01:01:37 +0000 | [diff] [blame] | 10 | #include <linux/hardirq.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 11 | #include <linux/init.h> |
Ralf Baechle | db813fe | 2007-09-27 18:26:43 +0100 | [diff] [blame] | 12 | #include <linux/highmem.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | #include <linux/kernel.h> |
Ralf Baechle | 641e97f | 2007-10-11 23:46:05 +0100 | [diff] [blame] | 14 | #include <linux/linkage.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 15 | #include <linux/sched.h> |
Ralf Baechle | 631330f | 2009-06-19 14:05:26 +0100 | [diff] [blame] | 16 | #include <linux/smp.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | #include <linux/mm.h> |
Chris Dearman | 3513369 | 2007-09-19 00:58:24 +0100 | [diff] [blame] | 18 | #include <linux/module.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | #include <linux/bitops.h> |
| 20 | |
| 21 | #include <asm/bcache.h> |
| 22 | #include <asm/bootinfo.h> |
Ralf Baechle | ec74e36 | 2005-07-13 11:48:45 +0000 | [diff] [blame] | 23 | #include <asm/cache.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | #include <asm/cacheops.h> |
| 25 | #include <asm/cpu.h> |
| 26 | #include <asm/cpu-features.h> |
| 27 | #include <asm/io.h> |
| 28 | #include <asm/page.h> |
| 29 | #include <asm/pgtable.h> |
| 30 | #include <asm/r4kcache.h> |
Ralf Baechle | e001e52 | 2007-07-28 12:45:47 +0100 | [diff] [blame] | 31 | #include <asm/sections.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | #include <asm/mmu_context.h> |
| 33 | #include <asm/war.h> |
Thiemo Seufer | ba5187d | 2005-04-25 16:36:23 +0000 | [diff] [blame] | 34 | #include <asm/cacheflush.h> /* for run_uncached() */ |
David Daney | 9cd9669b | 2012-05-15 00:04:49 -0700 | [diff] [blame^] | 35 | #include <asm/traps.h> |
Ralf Baechle | 7f3f1d0 | 2006-05-12 13:20:06 +0100 | [diff] [blame] | 36 | |
| 37 | /* |
| 38 | * Special Variant of smp_call_function for use by cache functions: |
| 39 | * |
| 40 | * o No return value |
| 41 | * o collapses to normal function call on UP kernels |
| 42 | * o collapses to normal function call on systems with a single shared |
| 43 | * primary cache. |
Ralf Baechle | c8c5f3f | 2010-10-29 19:08:25 +0100 | [diff] [blame] | 44 | * o doesn't disable interrupts on the local CPU |
Ralf Baechle | 7f3f1d0 | 2006-05-12 13:20:06 +0100 | [diff] [blame] | 45 | */ |
Ralf Baechle | 48a26e6 | 2010-10-29 19:08:25 +0100 | [diff] [blame] | 46 | static inline void r4k_on_each_cpu(void (*func) (void *info), void *info) |
Ralf Baechle | 7f3f1d0 | 2006-05-12 13:20:06 +0100 | [diff] [blame] | 47 | { |
| 48 | preempt_disable(); |
| 49 | |
| 50 | #if !defined(CONFIG_MIPS_MT_SMP) && !defined(CONFIG_MIPS_MT_SMTC) |
Ralf Baechle | 48a26e6 | 2010-10-29 19:08:25 +0100 | [diff] [blame] | 51 | smp_call_function(func, info, 1); |
Ralf Baechle | 7f3f1d0 | 2006-05-12 13:20:06 +0100 | [diff] [blame] | 52 | #endif |
| 53 | func(info); |
| 54 | preempt_enable(); |
| 55 | } |
| 56 | |
Ralf Baechle | 39b8d52 | 2008-04-28 17:14:26 +0100 | [diff] [blame] | 57 | #if defined(CONFIG_MIPS_CMP) |
| 58 | #define cpu_has_safe_index_cacheops 0 |
| 59 | #else |
| 60 | #define cpu_has_safe_index_cacheops 1 |
| 61 | #endif |
| 62 | |
Ralf Baechle | ec74e36 | 2005-07-13 11:48:45 +0000 | [diff] [blame] | 63 | /* |
| 64 | * Must die. |
| 65 | */ |
| 66 | static unsigned long icache_size __read_mostly; |
| 67 | static unsigned long dcache_size __read_mostly; |
| 68 | static unsigned long scache_size __read_mostly; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | |
| 70 | /* |
| 71 | * Dummy cache handling routines for machines without boardcaches |
| 72 | */ |
Chris Dearman | 73f4035 | 2006-06-20 18:06:52 +0100 | [diff] [blame] | 73 | static void cache_noop(void) {} |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | |
| 75 | static struct bcache_ops no_sc_ops = { |
Chris Dearman | 73f4035 | 2006-06-20 18:06:52 +0100 | [diff] [blame] | 76 | .bc_enable = (void *)cache_noop, |
| 77 | .bc_disable = (void *)cache_noop, |
| 78 | .bc_wback_inv = (void *)cache_noop, |
| 79 | .bc_inv = (void *)cache_noop |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | }; |
| 81 | |
| 82 | struct bcache_ops *bcops = &no_sc_ops; |
| 83 | |
Thiemo Seufer | 330cfe0 | 2005-09-01 18:33:58 +0000 | [diff] [blame] | 84 | #define cpu_is_r4600_v1_x() ((read_c0_prid() & 0xfffffff0) == 0x00002010) |
| 85 | #define cpu_is_r4600_v2_x() ((read_c0_prid() & 0xfffffff0) == 0x00002020) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | |
| 87 | #define R4600_HIT_CACHEOP_WAR_IMPL \ |
| 88 | do { \ |
| 89 | if (R4600_V2_HIT_CACHEOP_WAR && cpu_is_r4600_v2_x()) \ |
| 90 | *(volatile unsigned long *)CKSEG1; \ |
| 91 | if (R4600_V1_HIT_CACHEOP_WAR) \ |
| 92 | __asm__ __volatile__("nop;nop;nop;nop"); \ |
| 93 | } while (0) |
| 94 | |
| 95 | static void (*r4k_blast_dcache_page)(unsigned long addr); |
| 96 | |
| 97 | static inline void r4k_blast_dcache_page_dc32(unsigned long addr) |
| 98 | { |
| 99 | R4600_HIT_CACHEOP_WAR_IMPL; |
| 100 | blast_dcache32_page(addr); |
| 101 | } |
| 102 | |
Kevin Cernekee | 605b7ef | 2009-04-23 17:36:53 -0700 | [diff] [blame] | 103 | static inline void r4k_blast_dcache_page_dc64(unsigned long addr) |
| 104 | { |
| 105 | R4600_HIT_CACHEOP_WAR_IMPL; |
| 106 | blast_dcache64_page(addr); |
| 107 | } |
| 108 | |
Ralf Baechle | 234fcd1 | 2008-03-08 09:56:28 +0000 | [diff] [blame] | 109 | static void __cpuinit r4k_blast_dcache_page_setup(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | { |
| 111 | unsigned long dc_lsize = cpu_dcache_line_size(); |
| 112 | |
Chris Dearman | 73f4035 | 2006-06-20 18:06:52 +0100 | [diff] [blame] | 113 | if (dc_lsize == 0) |
| 114 | r4k_blast_dcache_page = (void *)cache_noop; |
| 115 | else if (dc_lsize == 16) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 116 | r4k_blast_dcache_page = blast_dcache16_page; |
| 117 | else if (dc_lsize == 32) |
| 118 | r4k_blast_dcache_page = r4k_blast_dcache_page_dc32; |
Kevin Cernekee | 605b7ef | 2009-04-23 17:36:53 -0700 | [diff] [blame] | 119 | else if (dc_lsize == 64) |
| 120 | r4k_blast_dcache_page = r4k_blast_dcache_page_dc64; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | } |
| 122 | |
| 123 | static void (* r4k_blast_dcache_page_indexed)(unsigned long addr); |
| 124 | |
Ralf Baechle | 234fcd1 | 2008-03-08 09:56:28 +0000 | [diff] [blame] | 125 | static void __cpuinit r4k_blast_dcache_page_indexed_setup(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 126 | { |
| 127 | unsigned long dc_lsize = cpu_dcache_line_size(); |
| 128 | |
Chris Dearman | 73f4035 | 2006-06-20 18:06:52 +0100 | [diff] [blame] | 129 | if (dc_lsize == 0) |
| 130 | r4k_blast_dcache_page_indexed = (void *)cache_noop; |
| 131 | else if (dc_lsize == 16) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | r4k_blast_dcache_page_indexed = blast_dcache16_page_indexed; |
| 133 | else if (dc_lsize == 32) |
| 134 | r4k_blast_dcache_page_indexed = blast_dcache32_page_indexed; |
Kevin Cernekee | 605b7ef | 2009-04-23 17:36:53 -0700 | [diff] [blame] | 135 | else if (dc_lsize == 64) |
| 136 | r4k_blast_dcache_page_indexed = blast_dcache64_page_indexed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 137 | } |
| 138 | |
| 139 | static void (* r4k_blast_dcache)(void); |
| 140 | |
Ralf Baechle | 234fcd1 | 2008-03-08 09:56:28 +0000 | [diff] [blame] | 141 | static void __cpuinit r4k_blast_dcache_setup(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | { |
| 143 | unsigned long dc_lsize = cpu_dcache_line_size(); |
| 144 | |
Chris Dearman | 73f4035 | 2006-06-20 18:06:52 +0100 | [diff] [blame] | 145 | if (dc_lsize == 0) |
| 146 | r4k_blast_dcache = (void *)cache_noop; |
| 147 | else if (dc_lsize == 16) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | r4k_blast_dcache = blast_dcache16; |
| 149 | else if (dc_lsize == 32) |
| 150 | r4k_blast_dcache = blast_dcache32; |
Kevin Cernekee | 605b7ef | 2009-04-23 17:36:53 -0700 | [diff] [blame] | 151 | else if (dc_lsize == 64) |
| 152 | r4k_blast_dcache = blast_dcache64; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 153 | } |
| 154 | |
| 155 | /* force code alignment (used for TX49XX_ICACHE_INDEX_INV_WAR) */ |
| 156 | #define JUMP_TO_ALIGN(order) \ |
| 157 | __asm__ __volatile__( \ |
| 158 | "b\t1f\n\t" \ |
| 159 | ".align\t" #order "\n\t" \ |
| 160 | "1:\n\t" \ |
| 161 | ) |
| 162 | #define CACHE32_UNROLL32_ALIGN JUMP_TO_ALIGN(10) /* 32 * 32 = 1024 */ |
| 163 | #define CACHE32_UNROLL32_ALIGN2 JUMP_TO_ALIGN(11) |
| 164 | |
| 165 | static inline void blast_r4600_v1_icache32(void) |
| 166 | { |
| 167 | unsigned long flags; |
| 168 | |
| 169 | local_irq_save(flags); |
| 170 | blast_icache32(); |
| 171 | local_irq_restore(flags); |
| 172 | } |
| 173 | |
| 174 | static inline void tx49_blast_icache32(void) |
| 175 | { |
| 176 | unsigned long start = INDEX_BASE; |
| 177 | unsigned long end = start + current_cpu_data.icache.waysize; |
| 178 | unsigned long ws_inc = 1UL << current_cpu_data.icache.waybit; |
| 179 | unsigned long ws_end = current_cpu_data.icache.ways << |
| 180 | current_cpu_data.icache.waybit; |
| 181 | unsigned long ws, addr; |
| 182 | |
| 183 | CACHE32_UNROLL32_ALIGN2; |
| 184 | /* I'm in even chunk. blast odd chunks */ |
Ralf Baechle | 42a3b4f | 2005-09-03 15:56:17 -0700 | [diff] [blame] | 185 | for (ws = 0; ws < ws_end; ws += ws_inc) |
| 186 | for (addr = start + 0x400; addr < end; addr += 0x400 * 2) |
Ralf Baechle | 21a151d | 2007-10-11 23:46:15 +0100 | [diff] [blame] | 187 | cache32_unroll32(addr|ws, Index_Invalidate_I); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 188 | CACHE32_UNROLL32_ALIGN; |
| 189 | /* I'm in odd chunk. blast even chunks */ |
Ralf Baechle | 42a3b4f | 2005-09-03 15:56:17 -0700 | [diff] [blame] | 190 | for (ws = 0; ws < ws_end; ws += ws_inc) |
| 191 | for (addr = start; addr < end; addr += 0x400 * 2) |
Ralf Baechle | 21a151d | 2007-10-11 23:46:15 +0100 | [diff] [blame] | 192 | cache32_unroll32(addr|ws, Index_Invalidate_I); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 193 | } |
| 194 | |
| 195 | static inline void blast_icache32_r4600_v1_page_indexed(unsigned long page) |
| 196 | { |
| 197 | unsigned long flags; |
| 198 | |
| 199 | local_irq_save(flags); |
| 200 | blast_icache32_page_indexed(page); |
| 201 | local_irq_restore(flags); |
| 202 | } |
| 203 | |
| 204 | static inline void tx49_blast_icache32_page_indexed(unsigned long page) |
| 205 | { |
Atsushi Nemoto | 67a3f6d | 2006-04-04 17:34:14 +0900 | [diff] [blame] | 206 | unsigned long indexmask = current_cpu_data.icache.waysize - 1; |
| 207 | unsigned long start = INDEX_BASE + (page & indexmask); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 208 | unsigned long end = start + PAGE_SIZE; |
| 209 | unsigned long ws_inc = 1UL << current_cpu_data.icache.waybit; |
| 210 | unsigned long ws_end = current_cpu_data.icache.ways << |
| 211 | current_cpu_data.icache.waybit; |
| 212 | unsigned long ws, addr; |
| 213 | |
| 214 | CACHE32_UNROLL32_ALIGN2; |
| 215 | /* I'm in even chunk. blast odd chunks */ |
Ralf Baechle | 42a3b4f | 2005-09-03 15:56:17 -0700 | [diff] [blame] | 216 | for (ws = 0; ws < ws_end; ws += ws_inc) |
| 217 | for (addr = start + 0x400; addr < end; addr += 0x400 * 2) |
Ralf Baechle | 21a151d | 2007-10-11 23:46:15 +0100 | [diff] [blame] | 218 | cache32_unroll32(addr|ws, Index_Invalidate_I); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 219 | CACHE32_UNROLL32_ALIGN; |
| 220 | /* I'm in odd chunk. blast even chunks */ |
Ralf Baechle | 42a3b4f | 2005-09-03 15:56:17 -0700 | [diff] [blame] | 221 | for (ws = 0; ws < ws_end; ws += ws_inc) |
| 222 | for (addr = start; addr < end; addr += 0x400 * 2) |
Ralf Baechle | 21a151d | 2007-10-11 23:46:15 +0100 | [diff] [blame] | 223 | cache32_unroll32(addr|ws, Index_Invalidate_I); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 224 | } |
| 225 | |
| 226 | static void (* r4k_blast_icache_page)(unsigned long addr); |
| 227 | |
Ralf Baechle | 234fcd1 | 2008-03-08 09:56:28 +0000 | [diff] [blame] | 228 | static void __cpuinit r4k_blast_icache_page_setup(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 229 | { |
| 230 | unsigned long ic_lsize = cpu_icache_line_size(); |
| 231 | |
Chris Dearman | 73f4035 | 2006-06-20 18:06:52 +0100 | [diff] [blame] | 232 | if (ic_lsize == 0) |
| 233 | r4k_blast_icache_page = (void *)cache_noop; |
| 234 | else if (ic_lsize == 16) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 235 | r4k_blast_icache_page = blast_icache16_page; |
| 236 | else if (ic_lsize == 32) |
| 237 | r4k_blast_icache_page = blast_icache32_page; |
| 238 | else if (ic_lsize == 64) |
| 239 | r4k_blast_icache_page = blast_icache64_page; |
| 240 | } |
| 241 | |
| 242 | |
| 243 | static void (* r4k_blast_icache_page_indexed)(unsigned long addr); |
| 244 | |
Ralf Baechle | 234fcd1 | 2008-03-08 09:56:28 +0000 | [diff] [blame] | 245 | static void __cpuinit r4k_blast_icache_page_indexed_setup(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 246 | { |
| 247 | unsigned long ic_lsize = cpu_icache_line_size(); |
| 248 | |
Chris Dearman | 73f4035 | 2006-06-20 18:06:52 +0100 | [diff] [blame] | 249 | if (ic_lsize == 0) |
| 250 | r4k_blast_icache_page_indexed = (void *)cache_noop; |
| 251 | else if (ic_lsize == 16) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 252 | r4k_blast_icache_page_indexed = blast_icache16_page_indexed; |
| 253 | else if (ic_lsize == 32) { |
Thiemo Seufer | 02fe2c9 | 2005-09-09 19:45:41 +0000 | [diff] [blame] | 254 | if (R4600_V1_INDEX_ICACHEOP_WAR && cpu_is_r4600_v1_x()) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 255 | r4k_blast_icache_page_indexed = |
| 256 | blast_icache32_r4600_v1_page_indexed; |
Thiemo Seufer | 02fe2c9 | 2005-09-09 19:45:41 +0000 | [diff] [blame] | 257 | else if (TX49XX_ICACHE_INDEX_INV_WAR) |
| 258 | r4k_blast_icache_page_indexed = |
| 259 | tx49_blast_icache32_page_indexed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 260 | else |
| 261 | r4k_blast_icache_page_indexed = |
| 262 | blast_icache32_page_indexed; |
| 263 | } else if (ic_lsize == 64) |
| 264 | r4k_blast_icache_page_indexed = blast_icache64_page_indexed; |
| 265 | } |
| 266 | |
| 267 | static void (* r4k_blast_icache)(void); |
| 268 | |
Ralf Baechle | 234fcd1 | 2008-03-08 09:56:28 +0000 | [diff] [blame] | 269 | static void __cpuinit r4k_blast_icache_setup(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 270 | { |
| 271 | unsigned long ic_lsize = cpu_icache_line_size(); |
| 272 | |
Chris Dearman | 73f4035 | 2006-06-20 18:06:52 +0100 | [diff] [blame] | 273 | if (ic_lsize == 0) |
| 274 | r4k_blast_icache = (void *)cache_noop; |
| 275 | else if (ic_lsize == 16) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 276 | r4k_blast_icache = blast_icache16; |
| 277 | else if (ic_lsize == 32) { |
| 278 | if (R4600_V1_INDEX_ICACHEOP_WAR && cpu_is_r4600_v1_x()) |
| 279 | r4k_blast_icache = blast_r4600_v1_icache32; |
| 280 | else if (TX49XX_ICACHE_INDEX_INV_WAR) |
| 281 | r4k_blast_icache = tx49_blast_icache32; |
| 282 | else |
| 283 | r4k_blast_icache = blast_icache32; |
| 284 | } else if (ic_lsize == 64) |
| 285 | r4k_blast_icache = blast_icache64; |
| 286 | } |
| 287 | |
| 288 | static void (* r4k_blast_scache_page)(unsigned long addr); |
| 289 | |
Ralf Baechle | 234fcd1 | 2008-03-08 09:56:28 +0000 | [diff] [blame] | 290 | static void __cpuinit r4k_blast_scache_page_setup(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 291 | { |
| 292 | unsigned long sc_lsize = cpu_scache_line_size(); |
| 293 | |
Ralf Baechle | 4debe4f | 2006-02-27 19:05:55 +0000 | [diff] [blame] | 294 | if (scache_size == 0) |
Chris Dearman | 73f4035 | 2006-06-20 18:06:52 +0100 | [diff] [blame] | 295 | r4k_blast_scache_page = (void *)cache_noop; |
Ralf Baechle | 4debe4f | 2006-02-27 19:05:55 +0000 | [diff] [blame] | 296 | else if (sc_lsize == 16) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 297 | r4k_blast_scache_page = blast_scache16_page; |
| 298 | else if (sc_lsize == 32) |
| 299 | r4k_blast_scache_page = blast_scache32_page; |
| 300 | else if (sc_lsize == 64) |
| 301 | r4k_blast_scache_page = blast_scache64_page; |
| 302 | else if (sc_lsize == 128) |
| 303 | r4k_blast_scache_page = blast_scache128_page; |
| 304 | } |
| 305 | |
| 306 | static void (* r4k_blast_scache_page_indexed)(unsigned long addr); |
| 307 | |
Ralf Baechle | 234fcd1 | 2008-03-08 09:56:28 +0000 | [diff] [blame] | 308 | static void __cpuinit r4k_blast_scache_page_indexed_setup(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 309 | { |
| 310 | unsigned long sc_lsize = cpu_scache_line_size(); |
| 311 | |
Ralf Baechle | 4debe4f | 2006-02-27 19:05:55 +0000 | [diff] [blame] | 312 | if (scache_size == 0) |
Chris Dearman | 73f4035 | 2006-06-20 18:06:52 +0100 | [diff] [blame] | 313 | r4k_blast_scache_page_indexed = (void *)cache_noop; |
Ralf Baechle | 4debe4f | 2006-02-27 19:05:55 +0000 | [diff] [blame] | 314 | else if (sc_lsize == 16) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | r4k_blast_scache_page_indexed = blast_scache16_page_indexed; |
| 316 | else if (sc_lsize == 32) |
| 317 | r4k_blast_scache_page_indexed = blast_scache32_page_indexed; |
| 318 | else if (sc_lsize == 64) |
| 319 | r4k_blast_scache_page_indexed = blast_scache64_page_indexed; |
| 320 | else if (sc_lsize == 128) |
| 321 | r4k_blast_scache_page_indexed = blast_scache128_page_indexed; |
| 322 | } |
| 323 | |
| 324 | static void (* r4k_blast_scache)(void); |
| 325 | |
Ralf Baechle | 234fcd1 | 2008-03-08 09:56:28 +0000 | [diff] [blame] | 326 | static void __cpuinit r4k_blast_scache_setup(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 327 | { |
| 328 | unsigned long sc_lsize = cpu_scache_line_size(); |
| 329 | |
Ralf Baechle | 4debe4f | 2006-02-27 19:05:55 +0000 | [diff] [blame] | 330 | if (scache_size == 0) |
Chris Dearman | 73f4035 | 2006-06-20 18:06:52 +0100 | [diff] [blame] | 331 | r4k_blast_scache = (void *)cache_noop; |
Ralf Baechle | 4debe4f | 2006-02-27 19:05:55 +0000 | [diff] [blame] | 332 | else if (sc_lsize == 16) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 333 | r4k_blast_scache = blast_scache16; |
| 334 | else if (sc_lsize == 32) |
| 335 | r4k_blast_scache = blast_scache32; |
| 336 | else if (sc_lsize == 64) |
| 337 | r4k_blast_scache = blast_scache64; |
| 338 | else if (sc_lsize == 128) |
| 339 | r4k_blast_scache = blast_scache128; |
| 340 | } |
| 341 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 342 | static inline void local_r4k___flush_cache_all(void * args) |
| 343 | { |
Fuxin Zhang | 2a21c73 | 2007-06-06 14:52:43 +0800 | [diff] [blame] | 344 | #if defined(CONFIG_CPU_LOONGSON2) |
| 345 | r4k_blast_scache(); |
| 346 | return; |
| 347 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 348 | r4k_blast_dcache(); |
| 349 | r4k_blast_icache(); |
| 350 | |
Ralf Baechle | 10cc352 | 2007-10-11 23:46:15 +0100 | [diff] [blame] | 351 | switch (current_cpu_type()) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 352 | case CPU_R4000SC: |
| 353 | case CPU_R4000MC: |
| 354 | case CPU_R4400SC: |
| 355 | case CPU_R4400MC: |
| 356 | case CPU_R10000: |
| 357 | case CPU_R12000: |
Kumba | 44d921b | 2006-05-16 22:23:59 -0400 | [diff] [blame] | 358 | case CPU_R14000: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 359 | r4k_blast_scache(); |
| 360 | } |
| 361 | } |
| 362 | |
| 363 | static void r4k___flush_cache_all(void) |
| 364 | { |
Ralf Baechle | 48a26e6 | 2010-10-29 19:08:25 +0100 | [diff] [blame] | 365 | r4k_on_each_cpu(local_r4k___flush_cache_all, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 366 | } |
| 367 | |
Ralf Baechle | a76ab5c | 2007-10-08 16:38:37 +0100 | [diff] [blame] | 368 | static inline int has_valid_asid(const struct mm_struct *mm) |
| 369 | { |
| 370 | #if defined(CONFIG_MIPS_MT_SMP) || defined(CONFIG_MIPS_MT_SMTC) |
| 371 | int i; |
| 372 | |
| 373 | for_each_online_cpu(i) |
| 374 | if (cpu_context(i, mm)) |
| 375 | return 1; |
| 376 | |
| 377 | return 0; |
| 378 | #else |
| 379 | return cpu_context(smp_processor_id(), mm); |
| 380 | #endif |
| 381 | } |
| 382 | |
Ralf Baechle | 9c5a3d7 | 2008-04-05 15:13:23 +0100 | [diff] [blame] | 383 | static void r4k__flush_cache_vmap(void) |
| 384 | { |
| 385 | r4k_blast_dcache(); |
| 386 | } |
| 387 | |
| 388 | static void r4k__flush_cache_vunmap(void) |
| 389 | { |
| 390 | r4k_blast_dcache(); |
| 391 | } |
| 392 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 393 | static inline void local_r4k_flush_cache_range(void * args) |
| 394 | { |
| 395 | struct vm_area_struct *vma = args; |
Ralf Baechle | 2eaa7ec | 2008-02-11 14:51:40 +0000 | [diff] [blame] | 396 | int exec = vma->vm_flags & VM_EXEC; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 397 | |
Ralf Baechle | a76ab5c | 2007-10-08 16:38:37 +0100 | [diff] [blame] | 398 | if (!(has_valid_asid(vma->vm_mm))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 399 | return; |
| 400 | |
Atsushi Nemoto | 0550d9d | 2006-08-22 21:15:47 +0900 | [diff] [blame] | 401 | r4k_blast_dcache(); |
Ralf Baechle | 2eaa7ec | 2008-02-11 14:51:40 +0000 | [diff] [blame] | 402 | if (exec) |
| 403 | r4k_blast_icache(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 404 | } |
| 405 | |
| 406 | static void r4k_flush_cache_range(struct vm_area_struct *vma, |
| 407 | unsigned long start, unsigned long end) |
| 408 | { |
Ralf Baechle | 2eaa7ec | 2008-02-11 14:51:40 +0000 | [diff] [blame] | 409 | int exec = vma->vm_flags & VM_EXEC; |
Atsushi Nemoto | 0550d9d | 2006-08-22 21:15:47 +0900 | [diff] [blame] | 410 | |
Ralf Baechle | 2eaa7ec | 2008-02-11 14:51:40 +0000 | [diff] [blame] | 411 | if (cpu_has_dc_aliases || (exec && !cpu_has_ic_fills_f_dc)) |
Ralf Baechle | 48a26e6 | 2010-10-29 19:08:25 +0100 | [diff] [blame] | 412 | r4k_on_each_cpu(local_r4k_flush_cache_range, vma); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 413 | } |
| 414 | |
| 415 | static inline void local_r4k_flush_cache_mm(void * args) |
| 416 | { |
| 417 | struct mm_struct *mm = args; |
| 418 | |
Ralf Baechle | a76ab5c | 2007-10-08 16:38:37 +0100 | [diff] [blame] | 419 | if (!has_valid_asid(mm)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 420 | return; |
| 421 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 422 | /* |
| 423 | * Kludge alert. For obscure reasons R4000SC and R4400SC go nuts if we |
| 424 | * only flush the primary caches but R10000 and R12000 behave sane ... |
Ralf Baechle | 617667b | 2006-11-30 01:14:48 +0000 | [diff] [blame] | 425 | * R4000SC and R4400SC indexed S-cache ops also invalidate primary |
| 426 | * caches, so we can bail out early. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 427 | */ |
Ralf Baechle | 10cc352 | 2007-10-11 23:46:15 +0100 | [diff] [blame] | 428 | if (current_cpu_type() == CPU_R4000SC || |
| 429 | current_cpu_type() == CPU_R4000MC || |
| 430 | current_cpu_type() == CPU_R4400SC || |
| 431 | current_cpu_type() == CPU_R4400MC) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 432 | r4k_blast_scache(); |
Ralf Baechle | 617667b | 2006-11-30 01:14:48 +0000 | [diff] [blame] | 433 | return; |
| 434 | } |
| 435 | |
| 436 | r4k_blast_dcache(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 437 | } |
| 438 | |
| 439 | static void r4k_flush_cache_mm(struct mm_struct *mm) |
| 440 | { |
| 441 | if (!cpu_has_dc_aliases) |
| 442 | return; |
| 443 | |
Ralf Baechle | 48a26e6 | 2010-10-29 19:08:25 +0100 | [diff] [blame] | 444 | r4k_on_each_cpu(local_r4k_flush_cache_mm, mm); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 445 | } |
| 446 | |
| 447 | struct flush_cache_page_args { |
| 448 | struct vm_area_struct *vma; |
Ralf Baechle | 6ec2580 | 2005-10-12 00:02:34 +0100 | [diff] [blame] | 449 | unsigned long addr; |
Atsushi Nemoto | de62893 | 2006-03-13 18:23:03 +0900 | [diff] [blame] | 450 | unsigned long pfn; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 451 | }; |
| 452 | |
| 453 | static inline void local_r4k_flush_cache_page(void *args) |
| 454 | { |
| 455 | struct flush_cache_page_args *fcp_args = args; |
| 456 | struct vm_area_struct *vma = fcp_args->vma; |
Ralf Baechle | 6ec2580 | 2005-10-12 00:02:34 +0100 | [diff] [blame] | 457 | unsigned long addr = fcp_args->addr; |
Ralf Baechle | db813fe | 2007-09-27 18:26:43 +0100 | [diff] [blame] | 458 | struct page *page = pfn_to_page(fcp_args->pfn); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 459 | int exec = vma->vm_flags & VM_EXEC; |
| 460 | struct mm_struct *mm = vma->vm_mm; |
Ralf Baechle | c9c5023 | 2008-06-14 22:22:08 +0100 | [diff] [blame] | 461 | int map_coherent = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 462 | pgd_t *pgdp; |
Ralf Baechle | c6e8b58 | 2005-02-10 12:19:59 +0000 | [diff] [blame] | 463 | pud_t *pudp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 464 | pmd_t *pmdp; |
| 465 | pte_t *ptep; |
Ralf Baechle | db813fe | 2007-09-27 18:26:43 +0100 | [diff] [blame] | 466 | void *vaddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 467 | |
Ralf Baechle | 79acf83 | 2005-02-10 13:54:37 +0000 | [diff] [blame] | 468 | /* |
| 469 | * If ownes no valid ASID yet, cannot possibly have gotten |
| 470 | * this page into the cache. |
| 471 | */ |
Ralf Baechle | a76ab5c | 2007-10-08 16:38:37 +0100 | [diff] [blame] | 472 | if (!has_valid_asid(mm)) |
Ralf Baechle | 79acf83 | 2005-02-10 13:54:37 +0000 | [diff] [blame] | 473 | return; |
| 474 | |
Ralf Baechle | 6ec2580 | 2005-10-12 00:02:34 +0100 | [diff] [blame] | 475 | addr &= PAGE_MASK; |
| 476 | pgdp = pgd_offset(mm, addr); |
| 477 | pudp = pud_offset(pgdp, addr); |
| 478 | pmdp = pmd_offset(pudp, addr); |
| 479 | ptep = pte_offset(pmdp, addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 480 | |
| 481 | /* |
| 482 | * If the page isn't marked valid, the page cannot possibly be |
| 483 | * in the cache. |
| 484 | */ |
Ralf Baechle | 526af35 | 2008-01-29 10:14:55 +0000 | [diff] [blame] | 485 | if (!(pte_present(*ptep))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 486 | return; |
| 487 | |
Ralf Baechle | db813fe | 2007-09-27 18:26:43 +0100 | [diff] [blame] | 488 | if ((mm == current->active_mm) && (pte_val(*ptep) & _PAGE_VALID)) |
| 489 | vaddr = NULL; |
| 490 | else { |
| 491 | /* |
| 492 | * Use kmap_coherent or kmap_atomic to do flushes for |
| 493 | * another ASID than the current one. |
| 494 | */ |
Ralf Baechle | c9c5023 | 2008-06-14 22:22:08 +0100 | [diff] [blame] | 495 | map_coherent = (cpu_has_dc_aliases && |
| 496 | page_mapped(page) && !Page_dcache_dirty(page)); |
| 497 | if (map_coherent) |
Ralf Baechle | db813fe | 2007-09-27 18:26:43 +0100 | [diff] [blame] | 498 | vaddr = kmap_coherent(page, addr); |
| 499 | else |
Cong Wang | 9c02048 | 2011-11-25 23:14:15 +0800 | [diff] [blame] | 500 | vaddr = kmap_atomic(page); |
Ralf Baechle | db813fe | 2007-09-27 18:26:43 +0100 | [diff] [blame] | 501 | addr = (unsigned long)vaddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 502 | } |
| 503 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 504 | if (cpu_has_dc_aliases || (exec && !cpu_has_ic_fills_f_dc)) { |
Ralf Baechle | db813fe | 2007-09-27 18:26:43 +0100 | [diff] [blame] | 505 | r4k_blast_dcache_page(addr); |
Ralf Baechle | 39b8d52 | 2008-04-28 17:14:26 +0100 | [diff] [blame] | 506 | if (exec && !cpu_icache_snoops_remote_store) |
| 507 | r4k_blast_scache_page(addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 508 | } |
| 509 | if (exec) { |
Ralf Baechle | db813fe | 2007-09-27 18:26:43 +0100 | [diff] [blame] | 510 | if (vaddr && cpu_has_vtag_icache && mm == current->active_mm) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 511 | int cpu = smp_processor_id(); |
| 512 | |
Thiemo Seufer | 26a51b2 | 2005-02-19 13:32:02 +0000 | [diff] [blame] | 513 | if (cpu_context(cpu, mm) != 0) |
| 514 | drop_mmu_context(mm, cpu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 515 | } else |
Ralf Baechle | db813fe | 2007-09-27 18:26:43 +0100 | [diff] [blame] | 516 | r4k_blast_icache_page(addr); |
| 517 | } |
| 518 | |
| 519 | if (vaddr) { |
Ralf Baechle | c9c5023 | 2008-06-14 22:22:08 +0100 | [diff] [blame] | 520 | if (map_coherent) |
Ralf Baechle | db813fe | 2007-09-27 18:26:43 +0100 | [diff] [blame] | 521 | kunmap_coherent(); |
| 522 | else |
Cong Wang | 9c02048 | 2011-11-25 23:14:15 +0800 | [diff] [blame] | 523 | kunmap_atomic(vaddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 524 | } |
| 525 | } |
| 526 | |
Ralf Baechle | 6ec2580 | 2005-10-12 00:02:34 +0100 | [diff] [blame] | 527 | static void r4k_flush_cache_page(struct vm_area_struct *vma, |
| 528 | unsigned long addr, unsigned long pfn) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 529 | { |
| 530 | struct flush_cache_page_args args; |
| 531 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 532 | args.vma = vma; |
Ralf Baechle | 6ec2580 | 2005-10-12 00:02:34 +0100 | [diff] [blame] | 533 | args.addr = addr; |
Atsushi Nemoto | de62893 | 2006-03-13 18:23:03 +0900 | [diff] [blame] | 534 | args.pfn = pfn; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 535 | |
Ralf Baechle | 48a26e6 | 2010-10-29 19:08:25 +0100 | [diff] [blame] | 536 | r4k_on_each_cpu(local_r4k_flush_cache_page, &args); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 537 | } |
| 538 | |
| 539 | static inline void local_r4k_flush_data_cache_page(void * addr) |
| 540 | { |
| 541 | r4k_blast_dcache_page((unsigned long) addr); |
| 542 | } |
| 543 | |
| 544 | static void r4k_flush_data_cache_page(unsigned long addr) |
| 545 | { |
Ralf Baechle | a754f70 | 2007-11-03 01:01:37 +0000 | [diff] [blame] | 546 | if (in_atomic()) |
| 547 | local_r4k_flush_data_cache_page((void *)addr); |
| 548 | else |
Ralf Baechle | 48a26e6 | 2010-10-29 19:08:25 +0100 | [diff] [blame] | 549 | r4k_on_each_cpu(local_r4k_flush_data_cache_page, (void *) addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 550 | } |
| 551 | |
| 552 | struct flush_icache_range_args { |
Atsushi Nemoto | d4264f1 | 2006-01-29 02:27:51 +0900 | [diff] [blame] | 553 | unsigned long start; |
| 554 | unsigned long end; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 555 | }; |
| 556 | |
Thomas Bogendoerfer | e0cee3e | 2008-08-04 20:53:57 +0200 | [diff] [blame] | 557 | static inline void local_r4k_flush_icache_range(unsigned long start, unsigned long end) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 558 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 559 | if (!cpu_has_ic_fills_f_dc) { |
Chris Dearman | 73f4035 | 2006-06-20 18:06:52 +0100 | [diff] [blame] | 560 | if (end - start >= dcache_size) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 561 | r4k_blast_dcache(); |
| 562 | } else { |
Thiemo Seufer | 10a3dab | 2005-09-09 20:26:54 +0000 | [diff] [blame] | 563 | R4600_HIT_CACHEOP_WAR_IMPL; |
Atsushi Nemoto | 41700e7 | 2006-02-10 00:39:06 +0900 | [diff] [blame] | 564 | protected_blast_dcache_range(start, end); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 565 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 566 | } |
| 567 | |
| 568 | if (end - start > icache_size) |
| 569 | r4k_blast_icache(); |
Atsushi Nemoto | 41700e7 | 2006-02-10 00:39:06 +0900 | [diff] [blame] | 570 | else |
| 571 | protected_blast_icache_range(start, end); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 572 | } |
| 573 | |
Thomas Bogendoerfer | e0cee3e | 2008-08-04 20:53:57 +0200 | [diff] [blame] | 574 | static inline void local_r4k_flush_icache_range_ipi(void *args) |
| 575 | { |
| 576 | struct flush_icache_range_args *fir_args = args; |
| 577 | unsigned long start = fir_args->start; |
| 578 | unsigned long end = fir_args->end; |
| 579 | |
| 580 | local_r4k_flush_icache_range(start, end); |
| 581 | } |
| 582 | |
Atsushi Nemoto | d4264f1 | 2006-01-29 02:27:51 +0900 | [diff] [blame] | 583 | static void r4k_flush_icache_range(unsigned long start, unsigned long end) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 584 | { |
| 585 | struct flush_icache_range_args args; |
| 586 | |
| 587 | args.start = start; |
| 588 | args.end = end; |
| 589 | |
Ralf Baechle | 48a26e6 | 2010-10-29 19:08:25 +0100 | [diff] [blame] | 590 | r4k_on_each_cpu(local_r4k_flush_icache_range_ipi, &args); |
Ralf Baechle | cc61c1f | 2005-07-12 18:35:38 +0000 | [diff] [blame] | 591 | instruction_hazard(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 592 | } |
| 593 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 594 | #ifdef CONFIG_DMA_NONCOHERENT |
| 595 | |
| 596 | static void r4k_dma_cache_wback_inv(unsigned long addr, unsigned long size) |
| 597 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 598 | /* Catch bad driver code */ |
| 599 | BUG_ON(size == 0); |
| 600 | |
Ralf Baechle | fc5d2d2 | 2006-07-06 13:04:01 +0100 | [diff] [blame] | 601 | if (cpu_has_inclusive_pcaches) { |
Atsushi Nemoto | 41700e7 | 2006-02-10 00:39:06 +0900 | [diff] [blame] | 602 | if (size >= scache_size) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 603 | r4k_blast_scache(); |
Atsushi Nemoto | 41700e7 | 2006-02-10 00:39:06 +0900 | [diff] [blame] | 604 | else |
| 605 | blast_scache_range(addr, addr + size); |
Kevin Cernekee | d0023c4 | 2010-09-06 21:03:46 -0700 | [diff] [blame] | 606 | __sync(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 607 | return; |
| 608 | } |
| 609 | |
| 610 | /* |
| 611 | * Either no secondary cache or the available caches don't have the |
| 612 | * subset property so we have to flush the primary caches |
| 613 | * explicitly |
| 614 | */ |
Ralf Baechle | 39b8d52 | 2008-04-28 17:14:26 +0100 | [diff] [blame] | 615 | if (cpu_has_safe_index_cacheops && size >= dcache_size) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 616 | r4k_blast_dcache(); |
| 617 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 618 | R4600_HIT_CACHEOP_WAR_IMPL; |
Atsushi Nemoto | 41700e7 | 2006-02-10 00:39:06 +0900 | [diff] [blame] | 619 | blast_dcache_range(addr, addr + size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 620 | } |
| 621 | |
| 622 | bc_wback_inv(addr, size); |
Kevin Cernekee | d0023c4 | 2010-09-06 21:03:46 -0700 | [diff] [blame] | 623 | __sync(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 624 | } |
| 625 | |
| 626 | static void r4k_dma_cache_inv(unsigned long addr, unsigned long size) |
| 627 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 628 | /* Catch bad driver code */ |
| 629 | BUG_ON(size == 0); |
| 630 | |
Ralf Baechle | fc5d2d2 | 2006-07-06 13:04:01 +0100 | [diff] [blame] | 631 | if (cpu_has_inclusive_pcaches) { |
Atsushi Nemoto | 41700e7 | 2006-02-10 00:39:06 +0900 | [diff] [blame] | 632 | if (size >= scache_size) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 633 | r4k_blast_scache(); |
Ralf Baechle | a8ca8b6 | 2009-01-11 18:44:49 +0000 | [diff] [blame] | 634 | else { |
| 635 | unsigned long lsize = cpu_scache_line_size(); |
| 636 | unsigned long almask = ~(lsize - 1); |
| 637 | |
| 638 | /* |
| 639 | * There is no clearly documented alignment requirement |
| 640 | * for the cache instruction on MIPS processors and |
| 641 | * some processors, among them the RM5200 and RM7000 |
| 642 | * QED processors will throw an address error for cache |
| 643 | * hit ops with insufficient alignment. Solved by |
| 644 | * aligning the address to cache line size. |
| 645 | */ |
| 646 | cache_op(Hit_Writeback_Inv_SD, addr & almask); |
| 647 | cache_op(Hit_Writeback_Inv_SD, |
| 648 | (addr + size - 1) & almask); |
Thomas Bogendoerfer | e9c3357 | 2007-11-26 23:40:01 +0100 | [diff] [blame] | 649 | blast_inv_scache_range(addr, addr + size); |
Ralf Baechle | a8ca8b6 | 2009-01-11 18:44:49 +0000 | [diff] [blame] | 650 | } |
Kevin Cernekee | d0023c4 | 2010-09-06 21:03:46 -0700 | [diff] [blame] | 651 | __sync(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 652 | return; |
| 653 | } |
| 654 | |
Ralf Baechle | 39b8d52 | 2008-04-28 17:14:26 +0100 | [diff] [blame] | 655 | if (cpu_has_safe_index_cacheops && size >= dcache_size) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 656 | r4k_blast_dcache(); |
| 657 | } else { |
Ralf Baechle | a8ca8b6 | 2009-01-11 18:44:49 +0000 | [diff] [blame] | 658 | unsigned long lsize = cpu_dcache_line_size(); |
| 659 | unsigned long almask = ~(lsize - 1); |
| 660 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 661 | R4600_HIT_CACHEOP_WAR_IMPL; |
Ralf Baechle | a8ca8b6 | 2009-01-11 18:44:49 +0000 | [diff] [blame] | 662 | cache_op(Hit_Writeback_Inv_D, addr & almask); |
| 663 | cache_op(Hit_Writeback_Inv_D, (addr + size - 1) & almask); |
Thomas Bogendoerfer | e9c3357 | 2007-11-26 23:40:01 +0100 | [diff] [blame] | 664 | blast_inv_dcache_range(addr, addr + size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 665 | } |
| 666 | |
| 667 | bc_inv(addr, size); |
Kevin Cernekee | d0023c4 | 2010-09-06 21:03:46 -0700 | [diff] [blame] | 668 | __sync(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 669 | } |
| 670 | #endif /* CONFIG_DMA_NONCOHERENT */ |
| 671 | |
| 672 | /* |
| 673 | * While we're protected against bad userland addresses we don't care |
| 674 | * very much about what happens in that case. Usually a segmentation |
| 675 | * fault will dump the process later on anyway ... |
| 676 | */ |
| 677 | static void local_r4k_flush_cache_sigtramp(void * arg) |
| 678 | { |
Thiemo Seufer | 02fe2c9 | 2005-09-09 19:45:41 +0000 | [diff] [blame] | 679 | unsigned long ic_lsize = cpu_icache_line_size(); |
| 680 | unsigned long dc_lsize = cpu_dcache_line_size(); |
| 681 | unsigned long sc_lsize = cpu_scache_line_size(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 682 | unsigned long addr = (unsigned long) arg; |
| 683 | |
| 684 | R4600_HIT_CACHEOP_WAR_IMPL; |
Chris Dearman | 73f4035 | 2006-06-20 18:06:52 +0100 | [diff] [blame] | 685 | if (dc_lsize) |
| 686 | protected_writeback_dcache_line(addr & ~(dc_lsize - 1)); |
Ralf Baechle | 4debe4f | 2006-02-27 19:05:55 +0000 | [diff] [blame] | 687 | if (!cpu_icache_snoops_remote_store && scache_size) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 688 | protected_writeback_scache_line(addr & ~(sc_lsize - 1)); |
Chris Dearman | 73f4035 | 2006-06-20 18:06:52 +0100 | [diff] [blame] | 689 | if (ic_lsize) |
| 690 | protected_flush_icache_line(addr & ~(ic_lsize - 1)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 691 | if (MIPS4K_ICACHE_REFILL_WAR) { |
| 692 | __asm__ __volatile__ ( |
| 693 | ".set push\n\t" |
| 694 | ".set noat\n\t" |
| 695 | ".set mips3\n\t" |
Ralf Baechle | 875d43e | 2005-09-03 15:56:16 -0700 | [diff] [blame] | 696 | #ifdef CONFIG_32BIT |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 697 | "la $at,1f\n\t" |
| 698 | #endif |
Ralf Baechle | 875d43e | 2005-09-03 15:56:16 -0700 | [diff] [blame] | 699 | #ifdef CONFIG_64BIT |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 700 | "dla $at,1f\n\t" |
| 701 | #endif |
| 702 | "cache %0,($at)\n\t" |
| 703 | "nop; nop; nop\n" |
| 704 | "1:\n\t" |
| 705 | ".set pop" |
| 706 | : |
| 707 | : "i" (Hit_Invalidate_I)); |
| 708 | } |
| 709 | if (MIPS_CACHE_SYNC_WAR) |
| 710 | __asm__ __volatile__ ("sync"); |
| 711 | } |
| 712 | |
| 713 | static void r4k_flush_cache_sigtramp(unsigned long addr) |
| 714 | { |
Ralf Baechle | 48a26e6 | 2010-10-29 19:08:25 +0100 | [diff] [blame] | 715 | r4k_on_each_cpu(local_r4k_flush_cache_sigtramp, (void *) addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 716 | } |
| 717 | |
| 718 | static void r4k_flush_icache_all(void) |
| 719 | { |
| 720 | if (cpu_has_vtag_icache) |
| 721 | r4k_blast_icache(); |
| 722 | } |
| 723 | |
Ralf Baechle | d9cdc901 | 2011-06-17 16:20:28 +0100 | [diff] [blame] | 724 | struct flush_kernel_vmap_range_args { |
| 725 | unsigned long vaddr; |
| 726 | int size; |
| 727 | }; |
| 728 | |
| 729 | static inline void local_r4k_flush_kernel_vmap_range(void *args) |
| 730 | { |
| 731 | struct flush_kernel_vmap_range_args *vmra = args; |
| 732 | unsigned long vaddr = vmra->vaddr; |
| 733 | int size = vmra->size; |
| 734 | |
| 735 | /* |
| 736 | * Aliases only affect the primary caches so don't bother with |
| 737 | * S-caches or T-caches. |
| 738 | */ |
| 739 | if (cpu_has_safe_index_cacheops && size >= dcache_size) |
| 740 | r4k_blast_dcache(); |
| 741 | else { |
| 742 | R4600_HIT_CACHEOP_WAR_IMPL; |
| 743 | blast_dcache_range(vaddr, vaddr + size); |
| 744 | } |
| 745 | } |
| 746 | |
| 747 | static void r4k_flush_kernel_vmap_range(unsigned long vaddr, int size) |
| 748 | { |
| 749 | struct flush_kernel_vmap_range_args args; |
| 750 | |
| 751 | args.vaddr = (unsigned long) vaddr; |
| 752 | args.size = size; |
| 753 | |
| 754 | r4k_on_each_cpu(local_r4k_flush_kernel_vmap_range, &args); |
| 755 | } |
| 756 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 757 | static inline void rm7k_erratum31(void) |
| 758 | { |
| 759 | const unsigned long ic_lsize = 32; |
| 760 | unsigned long addr; |
| 761 | |
| 762 | /* RM7000 erratum #31. The icache is screwed at startup. */ |
| 763 | write_c0_taglo(0); |
| 764 | write_c0_taghi(0); |
| 765 | |
| 766 | for (addr = INDEX_BASE; addr <= INDEX_BASE + 4096; addr += ic_lsize) { |
| 767 | __asm__ __volatile__ ( |
Thiemo Seufer | d8748a3 | 2005-09-02 09:56:12 +0000 | [diff] [blame] | 768 | ".set push\n\t" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 769 | ".set noreorder\n\t" |
| 770 | ".set mips3\n\t" |
| 771 | "cache\t%1, 0(%0)\n\t" |
| 772 | "cache\t%1, 0x1000(%0)\n\t" |
| 773 | "cache\t%1, 0x2000(%0)\n\t" |
| 774 | "cache\t%1, 0x3000(%0)\n\t" |
| 775 | "cache\t%2, 0(%0)\n\t" |
| 776 | "cache\t%2, 0x1000(%0)\n\t" |
| 777 | "cache\t%2, 0x2000(%0)\n\t" |
| 778 | "cache\t%2, 0x3000(%0)\n\t" |
| 779 | "cache\t%1, 0(%0)\n\t" |
| 780 | "cache\t%1, 0x1000(%0)\n\t" |
| 781 | "cache\t%1, 0x2000(%0)\n\t" |
| 782 | "cache\t%1, 0x3000(%0)\n\t" |
Thiemo Seufer | d8748a3 | 2005-09-02 09:56:12 +0000 | [diff] [blame] | 783 | ".set pop\n" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 784 | : |
| 785 | : "r" (addr), "i" (Index_Store_Tag_I), "i" (Fill)); |
| 786 | } |
| 787 | } |
| 788 | |
Ralf Baechle | 234fcd1 | 2008-03-08 09:56:28 +0000 | [diff] [blame] | 789 | static char *way_string[] __cpuinitdata = { NULL, "direct mapped", "2-way", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 790 | "3-way", "4-way", "5-way", "6-way", "7-way", "8-way" |
| 791 | }; |
| 792 | |
Ralf Baechle | 234fcd1 | 2008-03-08 09:56:28 +0000 | [diff] [blame] | 793 | static void __cpuinit probe_pcache(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 794 | { |
| 795 | struct cpuinfo_mips *c = ¤t_cpu_data; |
| 796 | unsigned int config = read_c0_config(); |
| 797 | unsigned int prid = read_c0_prid(); |
| 798 | unsigned long config1; |
| 799 | unsigned int lsize; |
| 800 | |
| 801 | switch (c->cputype) { |
| 802 | case CPU_R4600: /* QED style two way caches? */ |
| 803 | case CPU_R4700: |
| 804 | case CPU_R5000: |
| 805 | case CPU_NEVADA: |
| 806 | icache_size = 1 << (12 + ((config & CONF_IC) >> 9)); |
| 807 | c->icache.linesz = 16 << ((config & CONF_IB) >> 5); |
| 808 | c->icache.ways = 2; |
Atsushi Nemoto | 3c68da7 | 2006-04-08 01:33:31 +0900 | [diff] [blame] | 809 | c->icache.waybit = __ffs(icache_size/2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 810 | |
| 811 | dcache_size = 1 << (12 + ((config & CONF_DC) >> 6)); |
| 812 | c->dcache.linesz = 16 << ((config & CONF_DB) >> 4); |
| 813 | c->dcache.ways = 2; |
Atsushi Nemoto | 3c68da7 | 2006-04-08 01:33:31 +0900 | [diff] [blame] | 814 | c->dcache.waybit= __ffs(dcache_size/2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 815 | |
| 816 | c->options |= MIPS_CPU_CACHE_CDEX_P; |
| 817 | break; |
| 818 | |
| 819 | case CPU_R5432: |
| 820 | case CPU_R5500: |
| 821 | icache_size = 1 << (12 + ((config & CONF_IC) >> 9)); |
| 822 | c->icache.linesz = 16 << ((config & CONF_IB) >> 5); |
| 823 | c->icache.ways = 2; |
| 824 | c->icache.waybit= 0; |
| 825 | |
| 826 | dcache_size = 1 << (12 + ((config & CONF_DC) >> 6)); |
| 827 | c->dcache.linesz = 16 << ((config & CONF_DB) >> 4); |
| 828 | c->dcache.ways = 2; |
| 829 | c->dcache.waybit = 0; |
| 830 | |
Shinya Kuribayashi | 5864810 | 2009-03-18 09:04:01 +0900 | [diff] [blame] | 831 | c->options |= MIPS_CPU_CACHE_CDEX_P | MIPS_CPU_PREFETCH; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 832 | break; |
| 833 | |
| 834 | case CPU_TX49XX: |
| 835 | icache_size = 1 << (12 + ((config & CONF_IC) >> 9)); |
| 836 | c->icache.linesz = 16 << ((config & CONF_IB) >> 5); |
| 837 | c->icache.ways = 4; |
| 838 | c->icache.waybit= 0; |
| 839 | |
| 840 | dcache_size = 1 << (12 + ((config & CONF_DC) >> 6)); |
| 841 | c->dcache.linesz = 16 << ((config & CONF_DB) >> 4); |
| 842 | c->dcache.ways = 4; |
| 843 | c->dcache.waybit = 0; |
| 844 | |
| 845 | c->options |= MIPS_CPU_CACHE_CDEX_P; |
Atsushi Nemoto | de862b4 | 2006-03-17 12:59:22 +0900 | [diff] [blame] | 846 | c->options |= MIPS_CPU_PREFETCH; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 847 | break; |
| 848 | |
| 849 | case CPU_R4000PC: |
| 850 | case CPU_R4000SC: |
| 851 | case CPU_R4000MC: |
| 852 | case CPU_R4400PC: |
| 853 | case CPU_R4400SC: |
| 854 | case CPU_R4400MC: |
| 855 | case CPU_R4300: |
| 856 | icache_size = 1 << (12 + ((config & CONF_IC) >> 9)); |
| 857 | c->icache.linesz = 16 << ((config & CONF_IB) >> 5); |
| 858 | c->icache.ways = 1; |
| 859 | c->icache.waybit = 0; /* doesn't matter */ |
| 860 | |
| 861 | dcache_size = 1 << (12 + ((config & CONF_DC) >> 6)); |
| 862 | c->dcache.linesz = 16 << ((config & CONF_DB) >> 4); |
| 863 | c->dcache.ways = 1; |
| 864 | c->dcache.waybit = 0; /* does not matter */ |
| 865 | |
| 866 | c->options |= MIPS_CPU_CACHE_CDEX_P; |
| 867 | break; |
| 868 | |
| 869 | case CPU_R10000: |
| 870 | case CPU_R12000: |
Kumba | 44d921b | 2006-05-16 22:23:59 -0400 | [diff] [blame] | 871 | case CPU_R14000: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 872 | icache_size = 1 << (12 + ((config & R10K_CONF_IC) >> 29)); |
| 873 | c->icache.linesz = 64; |
| 874 | c->icache.ways = 2; |
| 875 | c->icache.waybit = 0; |
| 876 | |
| 877 | dcache_size = 1 << (12 + ((config & R10K_CONF_DC) >> 26)); |
| 878 | c->dcache.linesz = 32; |
| 879 | c->dcache.ways = 2; |
| 880 | c->dcache.waybit = 0; |
| 881 | |
| 882 | c->options |= MIPS_CPU_PREFETCH; |
| 883 | break; |
| 884 | |
| 885 | case CPU_VR4133: |
Yoichi Yuasa | 2874fe5 | 2006-07-08 00:42:12 +0900 | [diff] [blame] | 886 | write_c0_config(config & ~VR41_CONF_P4K); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 887 | case CPU_VR4131: |
| 888 | /* Workaround for cache instruction bug of VR4131 */ |
| 889 | if (c->processor_id == 0x0c80U || c->processor_id == 0x0c81U || |
| 890 | c->processor_id == 0x0c82U) { |
Yoichi Yuasa | 4e8ab36 | 2006-07-04 22:59:41 +0900 | [diff] [blame] | 891 | config |= 0x00400000U; |
| 892 | if (c->processor_id == 0x0c80U) |
| 893 | config |= VR41_CONF_BP; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 894 | write_c0_config(config); |
Yoichi Yuasa | 1058ecd | 2006-07-08 00:42:01 +0900 | [diff] [blame] | 895 | } else |
| 896 | c->options |= MIPS_CPU_CACHE_CDEX_P; |
| 897 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 898 | icache_size = 1 << (10 + ((config & CONF_IC) >> 9)); |
| 899 | c->icache.linesz = 16 << ((config & CONF_IB) >> 5); |
| 900 | c->icache.ways = 2; |
Atsushi Nemoto | 3c68da7 | 2006-04-08 01:33:31 +0900 | [diff] [blame] | 901 | c->icache.waybit = __ffs(icache_size/2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 902 | |
| 903 | dcache_size = 1 << (10 + ((config & CONF_DC) >> 6)); |
| 904 | c->dcache.linesz = 16 << ((config & CONF_DB) >> 4); |
| 905 | c->dcache.ways = 2; |
Atsushi Nemoto | 3c68da7 | 2006-04-08 01:33:31 +0900 | [diff] [blame] | 906 | c->dcache.waybit = __ffs(dcache_size/2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 907 | break; |
| 908 | |
| 909 | case CPU_VR41XX: |
| 910 | case CPU_VR4111: |
| 911 | case CPU_VR4121: |
| 912 | case CPU_VR4122: |
| 913 | case CPU_VR4181: |
| 914 | case CPU_VR4181A: |
| 915 | icache_size = 1 << (10 + ((config & CONF_IC) >> 9)); |
| 916 | c->icache.linesz = 16 << ((config & CONF_IB) >> 5); |
| 917 | c->icache.ways = 1; |
| 918 | c->icache.waybit = 0; /* doesn't matter */ |
| 919 | |
| 920 | dcache_size = 1 << (10 + ((config & CONF_DC) >> 6)); |
| 921 | c->dcache.linesz = 16 << ((config & CONF_DB) >> 4); |
| 922 | c->dcache.ways = 1; |
| 923 | c->dcache.waybit = 0; /* does not matter */ |
| 924 | |
| 925 | c->options |= MIPS_CPU_CACHE_CDEX_P; |
| 926 | break; |
| 927 | |
| 928 | case CPU_RM7000: |
| 929 | rm7k_erratum31(); |
| 930 | |
| 931 | case CPU_RM9000: |
| 932 | icache_size = 1 << (12 + ((config & CONF_IC) >> 9)); |
| 933 | c->icache.linesz = 16 << ((config & CONF_IB) >> 5); |
| 934 | c->icache.ways = 4; |
Atsushi Nemoto | 3c68da7 | 2006-04-08 01:33:31 +0900 | [diff] [blame] | 935 | c->icache.waybit = __ffs(icache_size / c->icache.ways); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 936 | |
| 937 | dcache_size = 1 << (12 + ((config & CONF_DC) >> 6)); |
| 938 | c->dcache.linesz = 16 << ((config & CONF_DB) >> 4); |
| 939 | c->dcache.ways = 4; |
Atsushi Nemoto | 3c68da7 | 2006-04-08 01:33:31 +0900 | [diff] [blame] | 940 | c->dcache.waybit = __ffs(dcache_size / c->dcache.ways); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 941 | |
| 942 | #if !defined(CONFIG_SMP) || !defined(RM9000_CDEX_SMP_WAR) |
| 943 | c->options |= MIPS_CPU_CACHE_CDEX_P; |
| 944 | #endif |
| 945 | c->options |= MIPS_CPU_PREFETCH; |
| 946 | break; |
| 947 | |
Fuxin Zhang | 2a21c73 | 2007-06-06 14:52:43 +0800 | [diff] [blame] | 948 | case CPU_LOONGSON2: |
| 949 | icache_size = 1 << (12 + ((config & CONF_IC) >> 9)); |
| 950 | c->icache.linesz = 16 << ((config & CONF_IB) >> 5); |
| 951 | if (prid & 0x3) |
| 952 | c->icache.ways = 4; |
| 953 | else |
| 954 | c->icache.ways = 2; |
| 955 | c->icache.waybit = 0; |
| 956 | |
| 957 | dcache_size = 1 << (12 + ((config & CONF_DC) >> 6)); |
| 958 | c->dcache.linesz = 16 << ((config & CONF_DB) >> 4); |
| 959 | if (prid & 0x3) |
| 960 | c->dcache.ways = 4; |
| 961 | else |
| 962 | c->dcache.ways = 2; |
| 963 | c->dcache.waybit = 0; |
| 964 | break; |
| 965 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 966 | default: |
| 967 | if (!(config & MIPS_CONF_M)) |
| 968 | panic("Don't know how to probe P-caches on this cpu."); |
| 969 | |
| 970 | /* |
| 971 | * So we seem to be a MIPS32 or MIPS64 CPU |
| 972 | * So let's probe the I-cache ... |
| 973 | */ |
| 974 | config1 = read_c0_config1(); |
| 975 | |
| 976 | if ((lsize = ((config1 >> 19) & 7))) |
| 977 | c->icache.linesz = 2 << lsize; |
| 978 | else |
| 979 | c->icache.linesz = lsize; |
| 980 | c->icache.sets = 64 << ((config1 >> 22) & 7); |
| 981 | c->icache.ways = 1 + ((config1 >> 16) & 7); |
| 982 | |
| 983 | icache_size = c->icache.sets * |
| 984 | c->icache.ways * |
| 985 | c->icache.linesz; |
Atsushi Nemoto | 3c68da7 | 2006-04-08 01:33:31 +0900 | [diff] [blame] | 986 | c->icache.waybit = __ffs(icache_size/c->icache.ways); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 987 | |
| 988 | if (config & 0x8) /* VI bit */ |
| 989 | c->icache.flags |= MIPS_CACHE_VTAG; |
| 990 | |
| 991 | /* |
| 992 | * Now probe the MIPS32 / MIPS64 data cache. |
| 993 | */ |
| 994 | c->dcache.flags = 0; |
| 995 | |
| 996 | if ((lsize = ((config1 >> 10) & 7))) |
| 997 | c->dcache.linesz = 2 << lsize; |
| 998 | else |
| 999 | c->dcache.linesz= lsize; |
| 1000 | c->dcache.sets = 64 << ((config1 >> 13) & 7); |
| 1001 | c->dcache.ways = 1 + ((config1 >> 7) & 7); |
| 1002 | |
| 1003 | dcache_size = c->dcache.sets * |
| 1004 | c->dcache.ways * |
| 1005 | c->dcache.linesz; |
Atsushi Nemoto | 3c68da7 | 2006-04-08 01:33:31 +0900 | [diff] [blame] | 1006 | c->dcache.waybit = __ffs(dcache_size/c->dcache.ways); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1007 | |
| 1008 | c->options |= MIPS_CPU_PREFETCH; |
| 1009 | break; |
| 1010 | } |
| 1011 | |
| 1012 | /* |
| 1013 | * Processor configuration sanity check for the R4000SC erratum |
| 1014 | * #5. With page sizes larger than 32kB there is no possibility |
| 1015 | * to get a VCE exception anymore so we don't care about this |
| 1016 | * misconfiguration. The case is rather theoretical anyway; |
| 1017 | * presumably no vendor is shipping his hardware in the "bad" |
| 1018 | * configuration. |
| 1019 | */ |
| 1020 | if ((prid & 0xff00) == PRID_IMP_R4000 && (prid & 0xff) < 0x40 && |
| 1021 | !(config & CONF_SC) && c->icache.linesz != 16 && |
| 1022 | PAGE_SIZE <= 0x8000) |
| 1023 | panic("Improper R4000SC processor configuration detected"); |
| 1024 | |
| 1025 | /* compute a couple of other cache variables */ |
| 1026 | c->icache.waysize = icache_size / c->icache.ways; |
| 1027 | c->dcache.waysize = dcache_size / c->dcache.ways; |
| 1028 | |
Chris Dearman | 73f4035 | 2006-06-20 18:06:52 +0100 | [diff] [blame] | 1029 | c->icache.sets = c->icache.linesz ? |
| 1030 | icache_size / (c->icache.linesz * c->icache.ways) : 0; |
| 1031 | c->dcache.sets = c->dcache.linesz ? |
| 1032 | dcache_size / (c->dcache.linesz * c->dcache.ways) : 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1033 | |
| 1034 | /* |
| 1035 | * R10000 and R12000 P-caches are odd in a positive way. They're 32kB |
| 1036 | * 2-way virtually indexed so normally would suffer from aliases. So |
| 1037 | * normally they'd suffer from aliases but magic in the hardware deals |
| 1038 | * with that for us so we don't need to take care ourselves. |
| 1039 | */ |
Ralf Baechle | d1e344e | 2005-02-04 15:51:26 +0000 | [diff] [blame] | 1040 | switch (c->cputype) { |
Ralf Baechle | a95970f | 2005-02-07 21:41:32 +0000 | [diff] [blame] | 1041 | case CPU_20KC: |
Ralf Baechle | 505403b | 2005-02-07 21:53:39 +0000 | [diff] [blame] | 1042 | case CPU_25KF: |
Ralf Baechle | 641e97f | 2007-10-11 23:46:05 +0100 | [diff] [blame] | 1043 | case CPU_SB1: |
| 1044 | case CPU_SB1A: |
Jayachandran C | efa0f81 | 2011-05-07 01:36:21 +0530 | [diff] [blame] | 1045 | case CPU_XLR: |
Atsushi Nemoto | de62893 | 2006-03-13 18:23:03 +0900 | [diff] [blame] | 1046 | c->dcache.flags |= MIPS_CACHE_PINDEX; |
Ralf Baechle | 641e97f | 2007-10-11 23:46:05 +0100 | [diff] [blame] | 1047 | break; |
| 1048 | |
Ralf Baechle | d1e344e | 2005-02-04 15:51:26 +0000 | [diff] [blame] | 1049 | case CPU_R10000: |
| 1050 | case CPU_R12000: |
Kumba | 44d921b | 2006-05-16 22:23:59 -0400 | [diff] [blame] | 1051 | case CPU_R14000: |
Ralf Baechle | d1e344e | 2005-02-04 15:51:26 +0000 | [diff] [blame] | 1052 | break; |
Ralf Baechle | 641e97f | 2007-10-11 23:46:05 +0100 | [diff] [blame] | 1053 | |
Ralf Baechle | d1e344e | 2005-02-04 15:51:26 +0000 | [diff] [blame] | 1054 | case CPU_24K: |
Nigel Stephens | 98a41de | 2006-04-27 15:50:32 +0100 | [diff] [blame] | 1055 | case CPU_34K: |
Ralf Baechle | 2e78ae3 | 2006-06-23 18:48:21 +0100 | [diff] [blame] | 1056 | case CPU_74K: |
Ralf Baechle | 39b8d52 | 2008-04-28 17:14:26 +0100 | [diff] [blame] | 1057 | case CPU_1004K: |
Ralf Baechle | beab375 | 2006-06-19 21:56:25 +0100 | [diff] [blame] | 1058 | if ((read_c0_config7() & (1 << 16))) { |
| 1059 | /* effectively physically indexed dcache, |
| 1060 | thus no virtual aliases. */ |
| 1061 | c->dcache.flags |= MIPS_CACHE_PINDEX; |
| 1062 | break; |
| 1063 | } |
Ralf Baechle | d1e344e | 2005-02-04 15:51:26 +0000 | [diff] [blame] | 1064 | default: |
Ralf Baechle | beab375 | 2006-06-19 21:56:25 +0100 | [diff] [blame] | 1065 | if (c->dcache.waysize > PAGE_SIZE) |
| 1066 | c->dcache.flags |= MIPS_CACHE_ALIASES; |
Ralf Baechle | d1e344e | 2005-02-04 15:51:26 +0000 | [diff] [blame] | 1067 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1068 | |
| 1069 | switch (c->cputype) { |
| 1070 | case CPU_20KC: |
| 1071 | /* |
| 1072 | * Some older 20Kc chips doesn't have the 'VI' bit in |
| 1073 | * the config register. |
| 1074 | */ |
| 1075 | c->icache.flags |= MIPS_CACHE_VTAG; |
| 1076 | break; |
| 1077 | |
Manuel Lauss | 270717a | 2009-03-25 17:49:28 +0100 | [diff] [blame] | 1078 | case CPU_ALCHEMY: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1079 | c->icache.flags |= MIPS_CACHE_IC_F_DC; |
| 1080 | break; |
| 1081 | } |
| 1082 | |
Fuxin Zhang | 2a21c73 | 2007-06-06 14:52:43 +0800 | [diff] [blame] | 1083 | #ifdef CONFIG_CPU_LOONGSON2 |
| 1084 | /* |
| 1085 | * LOONGSON2 has 4 way icache, but when using indexed cache op, |
| 1086 | * one op will act on all 4 ways |
| 1087 | */ |
| 1088 | c->icache.ways = 1; |
| 1089 | #endif |
| 1090 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1091 | printk("Primary instruction cache %ldkB, %s, %s, linesize %d bytes.\n", |
| 1092 | icache_size >> 10, |
Ralf Baechle | 7fc7316 | 2009-04-01 16:11:53 +0200 | [diff] [blame] | 1093 | c->icache.flags & MIPS_CACHE_VTAG ? "VIVT" : "VIPT", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1094 | way_string[c->icache.ways], c->icache.linesz); |
| 1095 | |
Ralf Baechle | 64bfca5 | 2007-10-15 16:35:45 +0100 | [diff] [blame] | 1096 | printk("Primary data cache %ldkB, %s, %s, %s, linesize %d bytes\n", |
| 1097 | dcache_size >> 10, way_string[c->dcache.ways], |
| 1098 | (c->dcache.flags & MIPS_CACHE_PINDEX) ? "PIPT" : "VIPT", |
| 1099 | (c->dcache.flags & MIPS_CACHE_ALIASES) ? |
| 1100 | "cache aliases" : "no aliases", |
| 1101 | c->dcache.linesz); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1102 | } |
| 1103 | |
| 1104 | /* |
| 1105 | * If you even _breathe_ on this function, look at the gcc output and make sure |
| 1106 | * it does not pop things on and off the stack for the cache sizing loop that |
| 1107 | * executes in KSEG1 space or else you will crash and burn badly. You have |
| 1108 | * been warned. |
| 1109 | */ |
Ralf Baechle | 234fcd1 | 2008-03-08 09:56:28 +0000 | [diff] [blame] | 1110 | static int __cpuinit probe_scache(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1111 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1112 | unsigned long flags, addr, begin, end, pow2; |
| 1113 | unsigned int config = read_c0_config(); |
| 1114 | struct cpuinfo_mips *c = ¤t_cpu_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1115 | |
| 1116 | if (config & CONF_SC) |
| 1117 | return 0; |
| 1118 | |
Ralf Baechle | e001e52 | 2007-07-28 12:45:47 +0100 | [diff] [blame] | 1119 | begin = (unsigned long) &_stext; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1120 | begin &= ~((4 * 1024 * 1024) - 1); |
| 1121 | end = begin + (4 * 1024 * 1024); |
| 1122 | |
| 1123 | /* |
| 1124 | * This is such a bitch, you'd think they would make it easy to do |
| 1125 | * this. Away you daemons of stupidity! |
| 1126 | */ |
| 1127 | local_irq_save(flags); |
| 1128 | |
| 1129 | /* Fill each size-multiple cache line with a valid tag. */ |
| 1130 | pow2 = (64 * 1024); |
| 1131 | for (addr = begin; addr < end; addr = (begin + pow2)) { |
| 1132 | unsigned long *p = (unsigned long *) addr; |
| 1133 | __asm__ __volatile__("nop" : : "r" (*p)); /* whee... */ |
| 1134 | pow2 <<= 1; |
| 1135 | } |
| 1136 | |
| 1137 | /* Load first line with zero (therefore invalid) tag. */ |
| 1138 | write_c0_taglo(0); |
| 1139 | write_c0_taghi(0); |
| 1140 | __asm__ __volatile__("nop; nop; nop; nop;"); /* avoid the hazard */ |
| 1141 | cache_op(Index_Store_Tag_I, begin); |
| 1142 | cache_op(Index_Store_Tag_D, begin); |
| 1143 | cache_op(Index_Store_Tag_SD, begin); |
| 1144 | |
| 1145 | /* Now search for the wrap around point. */ |
| 1146 | pow2 = (128 * 1024); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1147 | for (addr = begin + (128 * 1024); addr < end; addr = begin + pow2) { |
| 1148 | cache_op(Index_Load_Tag_SD, addr); |
| 1149 | __asm__ __volatile__("nop; nop; nop; nop;"); /* hazard... */ |
| 1150 | if (!read_c0_taglo()) |
| 1151 | break; |
| 1152 | pow2 <<= 1; |
| 1153 | } |
| 1154 | local_irq_restore(flags); |
| 1155 | addr -= begin; |
| 1156 | |
| 1157 | scache_size = addr; |
| 1158 | c->scache.linesz = 16 << ((config & R4K_CONF_SB) >> 22); |
| 1159 | c->scache.ways = 1; |
| 1160 | c->dcache.waybit = 0; /* does not matter */ |
| 1161 | |
| 1162 | return 1; |
| 1163 | } |
| 1164 | |
Fuxin Zhang | 2a21c73 | 2007-06-06 14:52:43 +0800 | [diff] [blame] | 1165 | #if defined(CONFIG_CPU_LOONGSON2) |
| 1166 | static void __init loongson2_sc_init(void) |
| 1167 | { |
| 1168 | struct cpuinfo_mips *c = ¤t_cpu_data; |
| 1169 | |
| 1170 | scache_size = 512*1024; |
| 1171 | c->scache.linesz = 32; |
| 1172 | c->scache.ways = 4; |
| 1173 | c->scache.waybit = 0; |
| 1174 | c->scache.waysize = scache_size / (c->scache.ways); |
| 1175 | c->scache.sets = scache_size / (c->scache.linesz * c->scache.ways); |
| 1176 | pr_info("Unified secondary cache %ldkB %s, linesize %d bytes.\n", |
| 1177 | scache_size >> 10, way_string[c->scache.ways], c->scache.linesz); |
| 1178 | |
| 1179 | c->options |= MIPS_CPU_INCLUSIVE_CACHES; |
| 1180 | } |
| 1181 | #endif |
| 1182 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1183 | extern int r5k_sc_init(void); |
| 1184 | extern int rm7k_sc_init(void); |
Chris Dearman | 9318c51 | 2006-06-20 17:15:20 +0100 | [diff] [blame] | 1185 | extern int mips_sc_init(void); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1186 | |
Ralf Baechle | 234fcd1 | 2008-03-08 09:56:28 +0000 | [diff] [blame] | 1187 | static void __cpuinit setup_scache(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1188 | { |
| 1189 | struct cpuinfo_mips *c = ¤t_cpu_data; |
| 1190 | unsigned int config = read_c0_config(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1191 | int sc_present = 0; |
| 1192 | |
| 1193 | /* |
| 1194 | * Do the probing thing on R4000SC and R4400SC processors. Other |
| 1195 | * processors don't have a S-cache that would be relevant to the |
Joe Perches | 603e82e | 2008-02-03 16:54:53 +0200 | [diff] [blame] | 1196 | * Linux memory management. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1197 | */ |
| 1198 | switch (c->cputype) { |
| 1199 | case CPU_R4000SC: |
| 1200 | case CPU_R4000MC: |
| 1201 | case CPU_R4400SC: |
| 1202 | case CPU_R4400MC: |
Thiemo Seufer | ba5187d | 2005-04-25 16:36:23 +0000 | [diff] [blame] | 1203 | sc_present = run_uncached(probe_scache); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1204 | if (sc_present) |
| 1205 | c->options |= MIPS_CPU_CACHE_CDEX_S; |
| 1206 | break; |
| 1207 | |
| 1208 | case CPU_R10000: |
| 1209 | case CPU_R12000: |
Kumba | 44d921b | 2006-05-16 22:23:59 -0400 | [diff] [blame] | 1210 | case CPU_R14000: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1211 | scache_size = 0x80000 << ((config & R10K_CONF_SS) >> 16); |
| 1212 | c->scache.linesz = 64 << ((config >> 13) & 1); |
| 1213 | c->scache.ways = 2; |
| 1214 | c->scache.waybit= 0; |
| 1215 | sc_present = 1; |
| 1216 | break; |
| 1217 | |
| 1218 | case CPU_R5000: |
| 1219 | case CPU_NEVADA: |
| 1220 | #ifdef CONFIG_R5000_CPU_SCACHE |
| 1221 | r5k_sc_init(); |
| 1222 | #endif |
| 1223 | return; |
| 1224 | |
| 1225 | case CPU_RM7000: |
| 1226 | case CPU_RM9000: |
| 1227 | #ifdef CONFIG_RM7000_CPU_SCACHE |
| 1228 | rm7k_sc_init(); |
| 1229 | #endif |
| 1230 | return; |
| 1231 | |
Fuxin Zhang | 2a21c73 | 2007-06-06 14:52:43 +0800 | [diff] [blame] | 1232 | #if defined(CONFIG_CPU_LOONGSON2) |
| 1233 | case CPU_LOONGSON2: |
| 1234 | loongson2_sc_init(); |
| 1235 | return; |
| 1236 | #endif |
Jayachandran C | a3d4fb2 | 2011-11-16 00:21:20 +0000 | [diff] [blame] | 1237 | case CPU_XLP: |
| 1238 | /* don't need to worry about L2, fully coherent */ |
| 1239 | return; |
Fuxin Zhang | 2a21c73 | 2007-06-06 14:52:43 +0800 | [diff] [blame] | 1240 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1241 | default: |
Chris Dearman | 9318c51 | 2006-06-20 17:15:20 +0100 | [diff] [blame] | 1242 | if (c->isa_level == MIPS_CPU_ISA_M32R1 || |
| 1243 | c->isa_level == MIPS_CPU_ISA_M32R2 || |
| 1244 | c->isa_level == MIPS_CPU_ISA_M64R1 || |
| 1245 | c->isa_level == MIPS_CPU_ISA_M64R2) { |
| 1246 | #ifdef CONFIG_MIPS_CPU_SCACHE |
| 1247 | if (mips_sc_init ()) { |
| 1248 | scache_size = c->scache.ways * c->scache.sets * c->scache.linesz; |
| 1249 | printk("MIPS secondary cache %ldkB, %s, linesize %d bytes.\n", |
| 1250 | scache_size >> 10, |
| 1251 | way_string[c->scache.ways], c->scache.linesz); |
| 1252 | } |
| 1253 | #else |
| 1254 | if (!(c->scache.flags & MIPS_CACHE_NOT_PRESENT)) |
| 1255 | panic("Dunno how to handle MIPS32 / MIPS64 second level cache"); |
| 1256 | #endif |
| 1257 | return; |
| 1258 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1259 | sc_present = 0; |
| 1260 | } |
| 1261 | |
| 1262 | if (!sc_present) |
| 1263 | return; |
| 1264 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1265 | /* compute a couple of other cache variables */ |
| 1266 | c->scache.waysize = scache_size / c->scache.ways; |
| 1267 | |
| 1268 | c->scache.sets = scache_size / (c->scache.linesz * c->scache.ways); |
| 1269 | |
| 1270 | printk("Unified secondary cache %ldkB %s, linesize %d bytes.\n", |
| 1271 | scache_size >> 10, way_string[c->scache.ways], c->scache.linesz); |
| 1272 | |
Ralf Baechle | fc5d2d2 | 2006-07-06 13:04:01 +0100 | [diff] [blame] | 1273 | c->options |= MIPS_CPU_INCLUSIVE_CACHES; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1274 | } |
| 1275 | |
Sergei Shtylyov | 9370b35 | 2006-05-26 19:44:54 +0400 | [diff] [blame] | 1276 | void au1x00_fixup_config_od(void) |
| 1277 | { |
| 1278 | /* |
| 1279 | * c0_config.od (bit 19) was write only (and read as 0) |
| 1280 | * on the early revisions of Alchemy SOCs. It disables the bus |
| 1281 | * transaction overlapping and needs to be set to fix various errata. |
| 1282 | */ |
| 1283 | switch (read_c0_prid()) { |
| 1284 | case 0x00030100: /* Au1000 DA */ |
| 1285 | case 0x00030201: /* Au1000 HA */ |
| 1286 | case 0x00030202: /* Au1000 HB */ |
| 1287 | case 0x01030200: /* Au1500 AB */ |
| 1288 | /* |
| 1289 | * Au1100 errata actually keeps silence about this bit, so we set it |
| 1290 | * just in case for those revisions that require it to be set according |
Manuel Lauss | 270717a | 2009-03-25 17:49:28 +0100 | [diff] [blame] | 1291 | * to the (now gone) cpu table. |
Sergei Shtylyov | 9370b35 | 2006-05-26 19:44:54 +0400 | [diff] [blame] | 1292 | */ |
| 1293 | case 0x02030200: /* Au1100 AB */ |
| 1294 | case 0x02030201: /* Au1100 BA */ |
| 1295 | case 0x02030202: /* Au1100 BC */ |
| 1296 | set_c0_config(1 << 19); |
| 1297 | break; |
| 1298 | } |
| 1299 | } |
| 1300 | |
Ralf Baechle | 89052bd | 2008-06-12 17:26:02 +0100 | [diff] [blame] | 1301 | /* CP0 hazard avoidance. */ |
| 1302 | #define NXP_BARRIER() \ |
| 1303 | __asm__ __volatile__( \ |
| 1304 | ".set noreorder\n\t" \ |
| 1305 | "nop; nop; nop; nop; nop; nop;\n\t" \ |
| 1306 | ".set reorder\n\t") |
| 1307 | |
| 1308 | static void nxp_pr4450_fixup_config(void) |
| 1309 | { |
| 1310 | unsigned long config0; |
| 1311 | |
| 1312 | config0 = read_c0_config(); |
| 1313 | |
| 1314 | /* clear all three cache coherency fields */ |
| 1315 | config0 &= ~(0x7 | (7 << 25) | (7 << 28)); |
| 1316 | config0 |= (((_page_cachable_default >> _CACHE_SHIFT) << 0) | |
| 1317 | ((_page_cachable_default >> _CACHE_SHIFT) << 25) | |
| 1318 | ((_page_cachable_default >> _CACHE_SHIFT) << 28)); |
| 1319 | write_c0_config(config0); |
| 1320 | NXP_BARRIER(); |
| 1321 | } |
| 1322 | |
Chris Dearman | 3513369 | 2007-09-19 00:58:24 +0100 | [diff] [blame] | 1323 | static int __cpuinitdata cca = -1; |
| 1324 | |
| 1325 | static int __init cca_setup(char *str) |
| 1326 | { |
| 1327 | get_option(&str, &cca); |
| 1328 | |
| 1329 | return 1; |
| 1330 | } |
| 1331 | |
| 1332 | __setup("cca=", cca_setup); |
| 1333 | |
Ralf Baechle | 234fcd1 | 2008-03-08 09:56:28 +0000 | [diff] [blame] | 1334 | static void __cpuinit coherency_setup(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1335 | { |
Chris Dearman | 3513369 | 2007-09-19 00:58:24 +0100 | [diff] [blame] | 1336 | if (cca < 0 || cca > 7) |
| 1337 | cca = read_c0_config() & CONF_CM_CMASK; |
| 1338 | _page_cachable_default = cca << _CACHE_SHIFT; |
| 1339 | |
| 1340 | pr_debug("Using cache attribute %d\n", cca); |
| 1341 | change_c0_config(CONF_CM_CMASK, cca); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1342 | |
| 1343 | /* |
| 1344 | * c0_status.cu=0 specifies that updates by the sc instruction use |
| 1345 | * the coherency mode specified by the TLB; 1 means cachable |
| 1346 | * coherent update on write will be used. Not all processors have |
| 1347 | * this bit and; some wire it to zero, others like Toshiba had the |
| 1348 | * silly idea of putting something else there ... |
| 1349 | */ |
Ralf Baechle | 10cc352 | 2007-10-11 23:46:15 +0100 | [diff] [blame] | 1350 | switch (current_cpu_type()) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1351 | case CPU_R4000PC: |
| 1352 | case CPU_R4000SC: |
| 1353 | case CPU_R4000MC: |
| 1354 | case CPU_R4400PC: |
| 1355 | case CPU_R4400SC: |
| 1356 | case CPU_R4400MC: |
| 1357 | clear_c0_config(CONF_CU); |
| 1358 | break; |
Sergei Shtylyov | 9370b35 | 2006-05-26 19:44:54 +0400 | [diff] [blame] | 1359 | /* |
Ralf Baechle | df586d5 | 2006-08-01 23:42:30 +0100 | [diff] [blame] | 1360 | * We need to catch the early Alchemy SOCs with |
Manuel Lauss | 270717a | 2009-03-25 17:49:28 +0100 | [diff] [blame] | 1361 | * the write-only co_config.od bit and set it back to one on: |
| 1362 | * Au1000 rev DA, HA, HB; Au1100 AB, BA, BC, Au1500 AB |
Sergei Shtylyov | 9370b35 | 2006-05-26 19:44:54 +0400 | [diff] [blame] | 1363 | */ |
Manuel Lauss | 270717a | 2009-03-25 17:49:28 +0100 | [diff] [blame] | 1364 | case CPU_ALCHEMY: |
Sergei Shtylyov | 9370b35 | 2006-05-26 19:44:54 +0400 | [diff] [blame] | 1365 | au1x00_fixup_config_od(); |
| 1366 | break; |
Ralf Baechle | 89052bd | 2008-06-12 17:26:02 +0100 | [diff] [blame] | 1367 | |
| 1368 | case PRID_IMP_PR4450: |
| 1369 | nxp_pr4450_fixup_config(); |
| 1370 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1371 | } |
| 1372 | } |
| 1373 | |
Ralf Baechle | 39b8d52 | 2008-04-28 17:14:26 +0100 | [diff] [blame] | 1374 | #if defined(CONFIG_DMA_NONCOHERENT) |
| 1375 | |
| 1376 | static int __cpuinitdata coherentio; |
| 1377 | |
| 1378 | static int __init setcoherentio(char *str) |
| 1379 | { |
| 1380 | coherentio = 1; |
| 1381 | |
| 1382 | return 1; |
| 1383 | } |
| 1384 | |
| 1385 | __setup("coherentio", setcoherentio); |
| 1386 | #endif |
| 1387 | |
David Daney | 9cd9669b | 2012-05-15 00:04:49 -0700 | [diff] [blame^] | 1388 | static void __cpuinit r4k_cache_error_setup(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1389 | { |
Ralf Baechle | 641e97f | 2007-10-11 23:46:05 +0100 | [diff] [blame] | 1390 | extern char __weak except_vec2_generic; |
| 1391 | extern char __weak except_vec2_sb1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1392 | struct cpuinfo_mips *c = ¤t_cpu_data; |
| 1393 | |
Ralf Baechle | 641e97f | 2007-10-11 23:46:05 +0100 | [diff] [blame] | 1394 | switch (c->cputype) { |
| 1395 | case CPU_SB1: |
| 1396 | case CPU_SB1A: |
| 1397 | set_uncached_handler(0x100, &except_vec2_sb1, 0x80); |
| 1398 | break; |
| 1399 | |
| 1400 | default: |
| 1401 | set_uncached_handler(0x100, &except_vec2_generic, 0x80); |
| 1402 | break; |
| 1403 | } |
David Daney | 9cd9669b | 2012-05-15 00:04:49 -0700 | [diff] [blame^] | 1404 | } |
| 1405 | |
| 1406 | void __cpuinit r4k_cache_init(void) |
| 1407 | { |
| 1408 | extern void build_clear_page(void); |
| 1409 | extern void build_copy_page(void); |
| 1410 | struct cpuinfo_mips *c = ¤t_cpu_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1411 | |
| 1412 | probe_pcache(); |
| 1413 | setup_scache(); |
| 1414 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1415 | r4k_blast_dcache_page_setup(); |
| 1416 | r4k_blast_dcache_page_indexed_setup(); |
| 1417 | r4k_blast_dcache_setup(); |
| 1418 | r4k_blast_icache_page_setup(); |
| 1419 | r4k_blast_icache_page_indexed_setup(); |
| 1420 | r4k_blast_icache_setup(); |
| 1421 | r4k_blast_scache_page_setup(); |
| 1422 | r4k_blast_scache_page_indexed_setup(); |
| 1423 | r4k_blast_scache_setup(); |
| 1424 | |
| 1425 | /* |
| 1426 | * Some MIPS32 and MIPS64 processors have physically indexed caches. |
| 1427 | * This code supports virtually indexed processors and will be |
| 1428 | * unnecessarily inefficient on physically indexed processors. |
| 1429 | */ |
Chris Dearman | 73f4035 | 2006-06-20 18:06:52 +0100 | [diff] [blame] | 1430 | if (c->dcache.linesz) |
| 1431 | shm_align_mask = max_t( unsigned long, |
| 1432 | c->dcache.sets * c->dcache.linesz - 1, |
| 1433 | PAGE_SIZE - 1); |
| 1434 | else |
| 1435 | shm_align_mask = PAGE_SIZE-1; |
Ralf Baechle | 9c5a3d7 | 2008-04-05 15:13:23 +0100 | [diff] [blame] | 1436 | |
| 1437 | __flush_cache_vmap = r4k__flush_cache_vmap; |
| 1438 | __flush_cache_vunmap = r4k__flush_cache_vunmap; |
| 1439 | |
Ralf Baechle | db813fe | 2007-09-27 18:26:43 +0100 | [diff] [blame] | 1440 | flush_cache_all = cache_noop; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1441 | __flush_cache_all = r4k___flush_cache_all; |
| 1442 | flush_cache_mm = r4k_flush_cache_mm; |
| 1443 | flush_cache_page = r4k_flush_cache_page; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1444 | flush_cache_range = r4k_flush_cache_range; |
| 1445 | |
Ralf Baechle | d9cdc901 | 2011-06-17 16:20:28 +0100 | [diff] [blame] | 1446 | __flush_kernel_vmap_range = r4k_flush_kernel_vmap_range; |
| 1447 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1448 | flush_cache_sigtramp = r4k_flush_cache_sigtramp; |
| 1449 | flush_icache_all = r4k_flush_icache_all; |
Ralf Baechle | 7e3bfc7 | 2006-04-05 20:42:04 +0100 | [diff] [blame] | 1450 | local_flush_data_cache_page = local_r4k_flush_data_cache_page; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1451 | flush_data_cache_page = r4k_flush_data_cache_page; |
| 1452 | flush_icache_range = r4k_flush_icache_range; |
Thomas Bogendoerfer | e0cee3e | 2008-08-04 20:53:57 +0200 | [diff] [blame] | 1453 | local_flush_icache_range = local_r4k_flush_icache_range; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1454 | |
Ralf Baechle | 39b8d52 | 2008-04-28 17:14:26 +0100 | [diff] [blame] | 1455 | #if defined(CONFIG_DMA_NONCOHERENT) |
| 1456 | if (coherentio) { |
| 1457 | _dma_cache_wback_inv = (void *)cache_noop; |
| 1458 | _dma_cache_wback = (void *)cache_noop; |
| 1459 | _dma_cache_inv = (void *)cache_noop; |
| 1460 | } else { |
| 1461 | _dma_cache_wback_inv = r4k_dma_cache_wback_inv; |
| 1462 | _dma_cache_wback = r4k_dma_cache_wback_inv; |
| 1463 | _dma_cache_inv = r4k_dma_cache_inv; |
| 1464 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1465 | #endif |
| 1466 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1467 | build_clear_page(); |
| 1468 | build_copy_page(); |
Ralf Baechle | 39b8d52 | 2008-04-28 17:14:26 +0100 | [diff] [blame] | 1469 | #if !defined(CONFIG_MIPS_CMP) |
Ralf Baechle | 1d40cfc | 2005-07-15 15:23:23 +0000 | [diff] [blame] | 1470 | local_r4k___flush_cache_all(NULL); |
Ralf Baechle | 39b8d52 | 2008-04-28 17:14:26 +0100 | [diff] [blame] | 1471 | #endif |
Ralf Baechle | 1d40cfc | 2005-07-15 15:23:23 +0000 | [diff] [blame] | 1472 | coherency_setup(); |
David Daney | 9cd9669b | 2012-05-15 00:04:49 -0700 | [diff] [blame^] | 1473 | board_cache_error_setup = r4k_cache_error_setup; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1474 | } |