Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * pSeries_lpar.c |
| 3 | * Copyright (C) 2001 Todd Inglett, IBM Corporation |
| 4 | * |
| 5 | * pSeries LPAR support. |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License as published by |
| 9 | * the Free Software Foundation; either version 2 of the License, or |
| 10 | * (at your option) any later version. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License |
| 18 | * along with this program; if not, write to the Free Software |
| 19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 20 | */ |
| 21 | |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 22 | #undef DEBUG_LOW |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | |
| 24 | #include <linux/config.h> |
| 25 | #include <linux/kernel.h> |
| 26 | #include <linux/dma-mapping.h> |
Benjamin Herrenschmidt | 463ce0e | 2005-11-23 17:56:06 +1100 | [diff] [blame] | 27 | #include <linux/console.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | #include <asm/processor.h> |
| 29 | #include <asm/mmu.h> |
| 30 | #include <asm/page.h> |
| 31 | #include <asm/pgtable.h> |
| 32 | #include <asm/machdep.h> |
| 33 | #include <asm/abs_addr.h> |
| 34 | #include <asm/mmu_context.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | #include <asm/iommu.h> |
| 36 | #include <asm/tlbflush.h> |
| 37 | #include <asm/tlb.h> |
| 38 | #include <asm/prom.h> |
| 39 | #include <asm/abs_addr.h> |
| 40 | #include <asm/cputable.h> |
David Gibson | dcad47f | 2005-11-07 09:49:43 +1100 | [diff] [blame] | 41 | #include <asm/udbg.h> |
Paul Mackerras | 2249ca9 | 2005-11-07 13:18:13 +1100 | [diff] [blame] | 42 | #include <asm/smp.h> |
Michael Ellerman | a121872 | 2005-11-03 15:33:31 +1100 | [diff] [blame] | 43 | |
| 44 | #include "plpar_wrappers.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 46 | #ifdef DEBUG_LOW |
| 47 | #define DBG_LOW(fmt...) do { udbg_printf(fmt); } while(0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | #else |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 49 | #define DBG_LOW(fmt...) do { } while(0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | #endif |
| 51 | |
| 52 | /* in pSeries_hvCall.S */ |
| 53 | EXPORT_SYMBOL(plpar_hcall); |
| 54 | EXPORT_SYMBOL(plpar_hcall_4out); |
| 55 | EXPORT_SYMBOL(plpar_hcall_norets); |
| 56 | EXPORT_SYMBOL(plpar_hcall_8arg_2ret); |
Heiko J Schick | b13a96c | 2006-03-30 22:47:14 +0200 | [diff] [blame] | 57 | EXPORT_SYMBOL(plpar_hcall_7arg_7ret); |
| 58 | EXPORT_SYMBOL(plpar_hcall_9arg_9ret); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | extern void pSeries_find_serial_port(void); |
| 60 | |
| 61 | |
| 62 | int vtermno; /* virtual terminal# for udbg */ |
| 63 | |
| 64 | #define __ALIGNED__ __attribute__((__aligned__(sizeof(long)))) |
Benjamin Herrenschmidt | 51d3082 | 2005-11-23 17:57:25 +1100 | [diff] [blame] | 65 | static void udbg_hvsi_putc(char c) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | { |
| 67 | /* packet's seqno isn't used anyways */ |
| 68 | uint8_t packet[] __ALIGNED__ = { 0xff, 5, 0, 0, c }; |
| 69 | int rc; |
| 70 | |
| 71 | if (c == '\n') |
| 72 | udbg_hvsi_putc('\r'); |
| 73 | |
| 74 | do { |
| 75 | rc = plpar_put_term_char(vtermno, sizeof(packet), packet); |
Segher Boessenkool | 706c8c9 | 2006-03-30 14:49:40 +0200 | [diff] [blame] | 76 | } while (rc == H_BUSY); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | } |
| 78 | |
| 79 | static long hvsi_udbg_buf_len; |
| 80 | static uint8_t hvsi_udbg_buf[256]; |
| 81 | |
| 82 | static int udbg_hvsi_getc_poll(void) |
| 83 | { |
| 84 | unsigned char ch; |
| 85 | int rc, i; |
| 86 | |
| 87 | if (hvsi_udbg_buf_len == 0) { |
| 88 | rc = plpar_get_term_char(vtermno, &hvsi_udbg_buf_len, hvsi_udbg_buf); |
Segher Boessenkool | 706c8c9 | 2006-03-30 14:49:40 +0200 | [diff] [blame] | 89 | if (rc != H_SUCCESS || hvsi_udbg_buf[0] != 0xff) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | /* bad read or non-data packet */ |
| 91 | hvsi_udbg_buf_len = 0; |
| 92 | } else { |
| 93 | /* remove the packet header */ |
| 94 | for (i = 4; i < hvsi_udbg_buf_len; i++) |
| 95 | hvsi_udbg_buf[i-4] = hvsi_udbg_buf[i]; |
| 96 | hvsi_udbg_buf_len -= 4; |
| 97 | } |
| 98 | } |
| 99 | |
| 100 | if (hvsi_udbg_buf_len <= 0 || hvsi_udbg_buf_len > 256) { |
| 101 | /* no data ready */ |
| 102 | hvsi_udbg_buf_len = 0; |
| 103 | return -1; |
| 104 | } |
| 105 | |
| 106 | ch = hvsi_udbg_buf[0]; |
| 107 | /* shift remaining data down */ |
| 108 | for (i = 1; i < hvsi_udbg_buf_len; i++) { |
| 109 | hvsi_udbg_buf[i-1] = hvsi_udbg_buf[i]; |
| 110 | } |
| 111 | hvsi_udbg_buf_len--; |
| 112 | |
| 113 | return ch; |
| 114 | } |
| 115 | |
Benjamin Herrenschmidt | bb6b9b2 | 2005-11-30 16:54:12 +1100 | [diff] [blame] | 116 | static int udbg_hvsi_getc(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 117 | { |
| 118 | int ch; |
| 119 | for (;;) { |
| 120 | ch = udbg_hvsi_getc_poll(); |
| 121 | if (ch == -1) { |
| 122 | /* This shouldn't be needed...but... */ |
| 123 | volatile unsigned long delay; |
| 124 | for (delay=0; delay < 2000000; delay++) |
| 125 | ; |
| 126 | } else { |
| 127 | return ch; |
| 128 | } |
| 129 | } |
| 130 | } |
| 131 | |
Benjamin Herrenschmidt | 51d3082 | 2005-11-23 17:57:25 +1100 | [diff] [blame] | 132 | static void udbg_putcLP(char c) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 133 | { |
| 134 | char buf[16]; |
| 135 | unsigned long rc; |
| 136 | |
| 137 | if (c == '\n') |
| 138 | udbg_putcLP('\r'); |
| 139 | |
| 140 | buf[0] = c; |
| 141 | do { |
| 142 | rc = plpar_put_term_char(vtermno, 1, buf); |
Segher Boessenkool | 706c8c9 | 2006-03-30 14:49:40 +0200 | [diff] [blame] | 143 | } while(rc == H_BUSY); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 144 | } |
| 145 | |
| 146 | /* Buffered chars getc */ |
| 147 | static long inbuflen; |
| 148 | static long inbuf[2]; /* must be 2 longs */ |
| 149 | |
| 150 | static int udbg_getc_pollLP(void) |
| 151 | { |
| 152 | /* The interface is tricky because it may return up to 16 chars. |
| 153 | * We save them statically for future calls to udbg_getc(). |
| 154 | */ |
| 155 | char ch, *buf = (char *)inbuf; |
| 156 | int i; |
| 157 | long rc; |
| 158 | if (inbuflen == 0) { |
| 159 | /* get some more chars. */ |
| 160 | inbuflen = 0; |
| 161 | rc = plpar_get_term_char(vtermno, &inbuflen, buf); |
Segher Boessenkool | 706c8c9 | 2006-03-30 14:49:40 +0200 | [diff] [blame] | 162 | if (rc != H_SUCCESS) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 163 | inbuflen = 0; /* otherwise inbuflen is garbage */ |
| 164 | } |
| 165 | if (inbuflen <= 0 || inbuflen > 16) { |
| 166 | /* Catch error case as well as other oddities (corruption) */ |
| 167 | inbuflen = 0; |
| 168 | return -1; |
| 169 | } |
| 170 | ch = buf[0]; |
| 171 | for (i = 1; i < inbuflen; i++) /* shuffle them down. */ |
| 172 | buf[i-1] = buf[i]; |
| 173 | inbuflen--; |
| 174 | return ch; |
| 175 | } |
| 176 | |
Benjamin Herrenschmidt | bb6b9b2 | 2005-11-30 16:54:12 +1100 | [diff] [blame] | 177 | static int udbg_getcLP(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | { |
| 179 | int ch; |
| 180 | for (;;) { |
| 181 | ch = udbg_getc_pollLP(); |
| 182 | if (ch == -1) { |
| 183 | /* This shouldn't be needed...but... */ |
| 184 | volatile unsigned long delay; |
| 185 | for (delay=0; delay < 2000000; delay++) |
| 186 | ; |
| 187 | } else { |
| 188 | return ch; |
| 189 | } |
| 190 | } |
| 191 | } |
| 192 | |
| 193 | /* call this from early_init() for a working debug console on |
| 194 | * vterm capable LPAR machines |
| 195 | */ |
Benjamin Herrenschmidt | 463ce0e | 2005-11-23 17:56:06 +1100 | [diff] [blame] | 196 | void __init udbg_init_debug_lpar(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 197 | { |
| 198 | vtermno = 0; |
Milton Miller | c8f1c8b | 2005-09-06 11:56:42 +1000 | [diff] [blame] | 199 | udbg_putc = udbg_putcLP; |
| 200 | udbg_getc = udbg_getcLP; |
| 201 | udbg_getc_poll = udbg_getc_pollLP; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 202 | } |
| 203 | |
| 204 | /* returns 0 if couldn't find or use /chosen/stdout as console */ |
Benjamin Herrenschmidt | 463ce0e | 2005-11-23 17:56:06 +1100 | [diff] [blame] | 205 | void __init find_udbg_vterm(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 206 | { |
| 207 | struct device_node *stdout_node; |
| 208 | u32 *termno; |
| 209 | char *name; |
Benjamin Herrenschmidt | 463ce0e | 2005-11-23 17:56:06 +1100 | [diff] [blame] | 210 | int add_console; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 211 | |
| 212 | /* find the boot console from /chosen/stdout */ |
| 213 | if (!of_chosen) |
Benjamin Herrenschmidt | 463ce0e | 2005-11-23 17:56:06 +1100 | [diff] [blame] | 214 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | name = (char *)get_property(of_chosen, "linux,stdout-path", NULL); |
| 216 | if (name == NULL) |
Benjamin Herrenschmidt | 463ce0e | 2005-11-23 17:56:06 +1100 | [diff] [blame] | 217 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 218 | stdout_node = of_find_node_by_path(name); |
| 219 | if (!stdout_node) |
Benjamin Herrenschmidt | 463ce0e | 2005-11-23 17:56:06 +1100 | [diff] [blame] | 220 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 221 | name = (char *)get_property(stdout_node, "name", NULL); |
| 222 | if (!name) { |
| 223 | printk(KERN_WARNING "stdout node missing 'name' property!\n"); |
| 224 | goto out; |
| 225 | } |
Benjamin Herrenschmidt | 463ce0e | 2005-11-23 17:56:06 +1100 | [diff] [blame] | 226 | /* The user has requested a console so this is already set up. */ |
| 227 | add_console = !strstr(cmd_line, "console="); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 228 | |
Benjamin Herrenschmidt | 463ce0e | 2005-11-23 17:56:06 +1100 | [diff] [blame] | 229 | /* Check if it's a virtual terminal */ |
| 230 | if (strncmp(name, "vty", 3) != 0) |
| 231 | goto out; |
| 232 | termno = (u32 *)get_property(stdout_node, "reg", NULL); |
| 233 | if (termno == NULL) |
| 234 | goto out; |
| 235 | vtermno = termno[0]; |
| 236 | |
| 237 | if (device_is_compatible(stdout_node, "hvterm1")) { |
| 238 | udbg_putc = udbg_putcLP; |
| 239 | udbg_getc = udbg_getcLP; |
| 240 | udbg_getc_poll = udbg_getc_pollLP; |
| 241 | if (add_console) |
| 242 | add_preferred_console("hvc", termno[0] & 0xff, NULL); |
| 243 | } else if (device_is_compatible(stdout_node, "hvterm-protocol")) { |
| 244 | vtermno = termno[0]; |
| 245 | udbg_putc = udbg_hvsi_putc; |
| 246 | udbg_getc = udbg_hvsi_getc; |
| 247 | udbg_getc_poll = udbg_hvsi_getc_poll; |
| 248 | if (add_console) |
| 249 | add_preferred_console("hvsi", termno[0] & 0xff, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 250 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 251 | out: |
| 252 | of_node_put(stdout_node); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | } |
| 254 | |
| 255 | void vpa_init(int cpu) |
| 256 | { |
| 257 | int hwcpu = get_hard_smp_processor_id(cpu); |
David Gibson | 3356bb9f7 | 2006-01-13 10:26:42 +1100 | [diff] [blame] | 258 | unsigned long vpa = __pa(&lppaca[cpu]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 259 | long ret; |
Olof Johansson | 233ccd0 | 2005-09-03 15:55:59 -0700 | [diff] [blame] | 260 | |
| 261 | if (cpu_has_feature(CPU_FTR_ALTIVEC)) |
David Gibson | 3356bb9f7 | 2006-01-13 10:26:42 +1100 | [diff] [blame] | 262 | lppaca[cpu].vmxregs_in_use = 1; |
Olof Johansson | 233ccd0 | 2005-09-03 15:55:59 -0700 | [diff] [blame] | 263 | |
Michael Ellerman | 40765d2 | 2005-11-03 19:34:38 +1100 | [diff] [blame] | 264 | ret = register_vpa(hwcpu, vpa); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 265 | |
| 266 | if (ret) |
| 267 | printk(KERN_ERR "WARNING: vpa_init: VPA registration for " |
| 268 | "cpu %d (hw %d) of area %lx returns %ld\n", |
Michael Ellerman | 40765d2 | 2005-11-03 19:34:38 +1100 | [diff] [blame] | 269 | cpu, hwcpu, vpa, ret); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 270 | } |
| 271 | |
| 272 | long pSeries_lpar_hpte_insert(unsigned long hpte_group, |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 273 | unsigned long va, unsigned long pa, |
| 274 | unsigned long rflags, unsigned long vflags, |
| 275 | int psize) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 276 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | unsigned long lpar_rc; |
| 278 | unsigned long flags; |
| 279 | unsigned long slot; |
David Gibson | 96e2844 | 2005-07-13 01:11:42 -0700 | [diff] [blame] | 280 | unsigned long hpte_v, hpte_r; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 281 | unsigned long dummy0, dummy1; |
| 282 | |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 283 | if (!(vflags & HPTE_V_BOLTED)) |
| 284 | DBG_LOW("hpte_insert(group=%lx, va=%016lx, pa=%016lx, " |
| 285 | "rflags=%lx, vflags=%lx, psize=%d)\n", |
| 286 | hpte_group, va, pa, rflags, vflags, psize); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 288 | hpte_v = hpte_encode_v(va, psize) | vflags | HPTE_V_VALID; |
| 289 | hpte_r = hpte_encode_r(pa, psize) | rflags; |
| 290 | |
| 291 | if (!(vflags & HPTE_V_BOLTED)) |
| 292 | DBG_LOW(" hpte_v=%016lx, hpte_r=%016lx\n", hpte_v, hpte_r); |
| 293 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 294 | /* Now fill in the actual HPTE */ |
| 295 | /* Set CEC cookie to 0 */ |
| 296 | /* Zero page = 0 */ |
| 297 | /* I-cache Invalidate = 0 */ |
| 298 | /* I-cache synchronize = 0 */ |
| 299 | /* Exact = 0 */ |
| 300 | flags = 0; |
| 301 | |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 302 | /* Make pHyp happy */ |
David Gibson | 96e2844 | 2005-07-13 01:11:42 -0700 | [diff] [blame] | 303 | if (rflags & (_PAGE_GUARDED|_PAGE_NO_CACHE)) |
| 304 | hpte_r &= ~_PAGE_COHERENT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 305 | |
David Gibson | 96e2844 | 2005-07-13 01:11:42 -0700 | [diff] [blame] | 306 | lpar_rc = plpar_hcall(H_ENTER, flags, hpte_group, hpte_v, |
| 307 | hpte_r, &slot, &dummy0, &dummy1); |
Segher Boessenkool | 706c8c9 | 2006-03-30 14:49:40 +0200 | [diff] [blame] | 308 | if (unlikely(lpar_rc == H_PTEG_FULL)) { |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 309 | if (!(vflags & HPTE_V_BOLTED)) |
| 310 | DBG_LOW(" full\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 311 | return -1; |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 312 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 313 | |
| 314 | /* |
| 315 | * Since we try and ioremap PHBs we don't own, the pte insert |
| 316 | * will fail. However we must catch the failure in hash_page |
| 317 | * or we will loop forever, so return -2 in this case. |
| 318 | */ |
Segher Boessenkool | 706c8c9 | 2006-03-30 14:49:40 +0200 | [diff] [blame] | 319 | if (unlikely(lpar_rc != H_SUCCESS)) { |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 320 | if (!(vflags & HPTE_V_BOLTED)) |
| 321 | DBG_LOW(" lpar err %d\n", lpar_rc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 322 | return -2; |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 323 | } |
| 324 | if (!(vflags & HPTE_V_BOLTED)) |
| 325 | DBG_LOW(" -> slot: %d\n", slot & 7); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 326 | |
| 327 | /* Because of iSeries, we have to pass down the secondary |
| 328 | * bucket bit here as well |
| 329 | */ |
David Gibson | 96e2844 | 2005-07-13 01:11:42 -0700 | [diff] [blame] | 330 | return (slot & 7) | (!!(vflags & HPTE_V_SECONDARY) << 3); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 331 | } |
| 332 | |
| 333 | static DEFINE_SPINLOCK(pSeries_lpar_tlbie_lock); |
| 334 | |
| 335 | static long pSeries_lpar_hpte_remove(unsigned long hpte_group) |
| 336 | { |
| 337 | unsigned long slot_offset; |
| 338 | unsigned long lpar_rc; |
| 339 | int i; |
| 340 | unsigned long dummy1, dummy2; |
| 341 | |
| 342 | /* pick a random slot to start at */ |
| 343 | slot_offset = mftb() & 0x7; |
| 344 | |
| 345 | for (i = 0; i < HPTES_PER_GROUP; i++) { |
| 346 | |
| 347 | /* don't remove a bolted entry */ |
| 348 | lpar_rc = plpar_pte_remove(H_ANDCOND, hpte_group + slot_offset, |
| 349 | (0x1UL << 4), &dummy1, &dummy2); |
Segher Boessenkool | 706c8c9 | 2006-03-30 14:49:40 +0200 | [diff] [blame] | 350 | if (lpar_rc == H_SUCCESS) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 351 | return i; |
Segher Boessenkool | 706c8c9 | 2006-03-30 14:49:40 +0200 | [diff] [blame] | 352 | BUG_ON(lpar_rc != H_NOT_FOUND); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 353 | |
| 354 | slot_offset++; |
| 355 | slot_offset &= 0x7; |
| 356 | } |
| 357 | |
| 358 | return -1; |
| 359 | } |
| 360 | |
| 361 | static void pSeries_lpar_hptab_clear(void) |
| 362 | { |
| 363 | unsigned long size_bytes = 1UL << ppc64_pft_size; |
| 364 | unsigned long hpte_count = size_bytes >> 4; |
| 365 | unsigned long dummy1, dummy2; |
| 366 | int i; |
| 367 | |
| 368 | /* TODO: Use bulk call */ |
| 369 | for (i = 0; i < hpte_count; i++) |
| 370 | plpar_pte_remove(0, i, 0, &dummy1, &dummy2); |
| 371 | } |
| 372 | |
| 373 | /* |
| 374 | * NOTE: for updatepp ops we are fortunate that the linux "newpp" bits and |
| 375 | * the low 3 bits of flags happen to line up. So no transform is needed. |
| 376 | * We can probably optimize here and assume the high bits of newpp are |
| 377 | * already zero. For now I am paranoid. |
| 378 | */ |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 379 | static long pSeries_lpar_hpte_updatepp(unsigned long slot, |
| 380 | unsigned long newpp, |
| 381 | unsigned long va, |
| 382 | int psize, int local) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 383 | { |
| 384 | unsigned long lpar_rc; |
| 385 | unsigned long flags = (newpp & 7) | H_AVPN; |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 386 | unsigned long want_v; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 387 | |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 388 | want_v = hpte_encode_v(va, psize); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 389 | |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 390 | DBG_LOW(" update: avpnv=%016lx, hash=%016lx, f=%x, psize: %d ... ", |
| 391 | want_v & HPTE_V_AVPN, slot, flags, psize); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 392 | |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 393 | lpar_rc = plpar_pte_protect(flags, slot, want_v & HPTE_V_AVPN); |
| 394 | |
Segher Boessenkool | 706c8c9 | 2006-03-30 14:49:40 +0200 | [diff] [blame] | 395 | if (lpar_rc == H_NOT_FOUND) { |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 396 | DBG_LOW("not found !\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 397 | return -1; |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 398 | } |
| 399 | |
| 400 | DBG_LOW("ok\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 401 | |
Segher Boessenkool | 706c8c9 | 2006-03-30 14:49:40 +0200 | [diff] [blame] | 402 | BUG_ON(lpar_rc != H_SUCCESS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 403 | |
| 404 | return 0; |
| 405 | } |
| 406 | |
| 407 | static unsigned long pSeries_lpar_hpte_getword0(unsigned long slot) |
| 408 | { |
| 409 | unsigned long dword0; |
| 410 | unsigned long lpar_rc; |
| 411 | unsigned long dummy_word1; |
| 412 | unsigned long flags; |
| 413 | |
| 414 | /* Read 1 pte at a time */ |
| 415 | /* Do not need RPN to logical page translation */ |
| 416 | /* No cross CEC PFT access */ |
| 417 | flags = 0; |
| 418 | |
| 419 | lpar_rc = plpar_pte_read(flags, slot, &dword0, &dummy_word1); |
| 420 | |
Segher Boessenkool | 706c8c9 | 2006-03-30 14:49:40 +0200 | [diff] [blame] | 421 | BUG_ON(lpar_rc != H_SUCCESS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 422 | |
| 423 | return dword0; |
| 424 | } |
| 425 | |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 426 | static long pSeries_lpar_hpte_find(unsigned long va, int psize) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 427 | { |
| 428 | unsigned long hash; |
| 429 | unsigned long i, j; |
| 430 | long slot; |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 431 | unsigned long want_v, hpte_v; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 432 | |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 433 | hash = hpt_hash(va, mmu_psize_defs[psize].shift); |
| 434 | want_v = hpte_encode_v(va, psize); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 435 | |
| 436 | for (j = 0; j < 2; j++) { |
| 437 | slot = (hash & htab_hash_mask) * HPTES_PER_GROUP; |
| 438 | for (i = 0; i < HPTES_PER_GROUP; i++) { |
David Gibson | 96e2844 | 2005-07-13 01:11:42 -0700 | [diff] [blame] | 439 | hpte_v = pSeries_lpar_hpte_getword0(slot); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 440 | |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 441 | if (HPTE_V_COMPARE(hpte_v, want_v) |
David Gibson | 96e2844 | 2005-07-13 01:11:42 -0700 | [diff] [blame] | 442 | && (hpte_v & HPTE_V_VALID) |
| 443 | && (!!(hpte_v & HPTE_V_SECONDARY) == j)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 444 | /* HPTE matches */ |
| 445 | if (j) |
| 446 | slot = -slot; |
| 447 | return slot; |
| 448 | } |
| 449 | ++slot; |
| 450 | } |
| 451 | hash = ~hash; |
| 452 | } |
| 453 | |
| 454 | return -1; |
| 455 | } |
| 456 | |
| 457 | static void pSeries_lpar_hpte_updateboltedpp(unsigned long newpp, |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 458 | unsigned long ea, |
| 459 | int psize) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 460 | { |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 461 | unsigned long lpar_rc, slot, vsid, va, flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 462 | |
| 463 | vsid = get_kernel_vsid(ea); |
| 464 | va = (vsid << 28) | (ea & 0x0fffffff); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 465 | |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 466 | slot = pSeries_lpar_hpte_find(va, psize); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 467 | BUG_ON(slot == -1); |
| 468 | |
| 469 | flags = newpp & 7; |
| 470 | lpar_rc = plpar_pte_protect(flags, slot, 0); |
| 471 | |
Segher Boessenkool | 706c8c9 | 2006-03-30 14:49:40 +0200 | [diff] [blame] | 472 | BUG_ON(lpar_rc != H_SUCCESS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 473 | } |
| 474 | |
| 475 | static void pSeries_lpar_hpte_invalidate(unsigned long slot, unsigned long va, |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 476 | int psize, int local) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 477 | { |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 478 | unsigned long want_v; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 479 | unsigned long lpar_rc; |
| 480 | unsigned long dummy1, dummy2; |
| 481 | |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 482 | DBG_LOW(" inval : slot=%lx, va=%016lx, psize: %d, local: %d", |
| 483 | slot, va, psize, local); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 484 | |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 485 | want_v = hpte_encode_v(va, psize); |
| 486 | lpar_rc = plpar_pte_remove(H_AVPN, slot, want_v & HPTE_V_AVPN, |
| 487 | &dummy1, &dummy2); |
Segher Boessenkool | 706c8c9 | 2006-03-30 14:49:40 +0200 | [diff] [blame] | 488 | if (lpar_rc == H_NOT_FOUND) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 489 | return; |
| 490 | |
Segher Boessenkool | 706c8c9 | 2006-03-30 14:49:40 +0200 | [diff] [blame] | 491 | BUG_ON(lpar_rc != H_SUCCESS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 492 | } |
| 493 | |
| 494 | /* |
| 495 | * Take a spinlock around flushes to avoid bouncing the hypervisor tlbie |
| 496 | * lock. |
| 497 | */ |
Benjamin Herrenschmidt | 61b1a94 | 2005-09-20 13:52:50 +1000 | [diff] [blame] | 498 | void pSeries_lpar_flush_hash_range(unsigned long number, int local) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 499 | { |
| 500 | int i; |
| 501 | unsigned long flags = 0; |
| 502 | struct ppc64_tlb_batch *batch = &__get_cpu_var(ppc64_tlb_batch); |
| 503 | int lock_tlbie = !cpu_has_feature(CPU_FTR_LOCKLESS_TLBIE); |
| 504 | |
| 505 | if (lock_tlbie) |
| 506 | spin_lock_irqsave(&pSeries_lpar_tlbie_lock, flags); |
| 507 | |
| 508 | for (i = 0; i < number; i++) |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 509 | flush_hash_page(batch->vaddr[i], batch->pte[i], |
| 510 | batch->psize, local); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 511 | |
| 512 | if (lock_tlbie) |
| 513 | spin_unlock_irqrestore(&pSeries_lpar_tlbie_lock, flags); |
| 514 | } |
| 515 | |
| 516 | void hpte_init_lpar(void) |
| 517 | { |
| 518 | ppc_md.hpte_invalidate = pSeries_lpar_hpte_invalidate; |
| 519 | ppc_md.hpte_updatepp = pSeries_lpar_hpte_updatepp; |
| 520 | ppc_md.hpte_updateboltedpp = pSeries_lpar_hpte_updateboltedpp; |
| 521 | ppc_md.hpte_insert = pSeries_lpar_hpte_insert; |
| 522 | ppc_md.hpte_remove = pSeries_lpar_hpte_remove; |
| 523 | ppc_md.flush_hash_range = pSeries_lpar_flush_hash_range; |
| 524 | ppc_md.hpte_clear_all = pSeries_lpar_hptab_clear; |
| 525 | |
| 526 | htab_finish_init(); |
| 527 | } |