Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * native hashtable management. |
| 3 | * |
| 4 | * SMP scalability work: |
| 5 | * Copyright (C) 2001 Anton Blanchard <anton@au.ibm.com>, IBM |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or |
| 8 | * modify it under the terms of the GNU General Public License |
| 9 | * as published by the Free Software Foundation; either version |
| 10 | * 2 of the License, or (at your option) any later version. |
| 11 | */ |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 12 | |
| 13 | #undef DEBUG_LOW |
| 14 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 15 | #include <linux/spinlock.h> |
| 16 | #include <linux/bitops.h> |
Michael Ellerman | beacc6d | 2012-07-25 21:20:03 +0000 | [diff] [blame] | 17 | #include <linux/of.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | #include <linux/threads.h> |
| 19 | #include <linux/smp.h> |
| 20 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | #include <asm/machdep.h> |
| 22 | #include <asm/mmu.h> |
| 23 | #include <asm/mmu_context.h> |
| 24 | #include <asm/pgtable.h> |
| 25 | #include <asm/tlbflush.h> |
| 26 | #include <asm/tlb.h> |
| 27 | #include <asm/cputable.h> |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 28 | #include <asm/udbg.h> |
Luke Browning | 71bf08b | 2007-05-03 00:19:11 +1000 | [diff] [blame] | 29 | #include <asm/kexec.h> |
Milton Miller | 60dbf43 | 2009-04-29 20:58:01 +0000 | [diff] [blame] | 30 | #include <asm/ppc-opcode.h> |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 31 | |
| 32 | #ifdef DEBUG_LOW |
| 33 | #define DBG_LOW(fmt...) udbg_printf(fmt) |
| 34 | #else |
| 35 | #define DBG_LOW(fmt...) |
| 36 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | |
| 38 | #define HPTE_LOCK_BIT 3 |
| 39 | |
Paul Mackerras | 9e368f2 | 2011-06-29 00:40:08 +0000 | [diff] [blame] | 40 | DEFINE_RAW_SPINLOCK(native_tlbie_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | |
Paul Mackerras | 1189be6 | 2007-10-11 20:37:10 +1000 | [diff] [blame] | 42 | static inline void __tlbie(unsigned long va, int psize, int ssize) |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 43 | { |
| 44 | unsigned int penc; |
| 45 | |
| 46 | /* clear top 16 bits, non SLS segment */ |
| 47 | va &= ~(0xffffULL << 48); |
| 48 | |
| 49 | switch (psize) { |
| 50 | case MMU_PAGE_4K: |
| 51 | va &= ~0xffful; |
Paul Mackerras | 1189be6 | 2007-10-11 20:37:10 +1000 | [diff] [blame] | 52 | va |= ssize << 8; |
Michael Neuling | a32e252 | 2011-04-06 18:23:29 +0000 | [diff] [blame] | 53 | asm volatile(ASM_FTR_IFCLR("tlbie %0,0", PPC_TLBIE(%1,%0), %2) |
Paul Mackerras | 969391c | 2011-06-29 00:26:11 +0000 | [diff] [blame] | 54 | : : "r" (va), "r"(0), "i" (CPU_FTR_ARCH_206) |
Milton Miller | 60dbf43 | 2009-04-29 20:58:01 +0000 | [diff] [blame] | 55 | : "memory"); |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 56 | break; |
| 57 | default: |
| 58 | penc = mmu_psize_defs[psize].penc; |
| 59 | va &= ~((1ul << mmu_psize_defs[psize].shift) - 1); |
Arnd Bergmann | 19242b2 | 2006-06-15 21:15:44 +1000 | [diff] [blame] | 60 | va |= penc << 12; |
Paul Mackerras | 1189be6 | 2007-10-11 20:37:10 +1000 | [diff] [blame] | 61 | va |= ssize << 8; |
Milton Miller | 60dbf43 | 2009-04-29 20:58:01 +0000 | [diff] [blame] | 62 | va |= 1; /* L */ |
Michael Neuling | a32e252 | 2011-04-06 18:23:29 +0000 | [diff] [blame] | 63 | asm volatile(ASM_FTR_IFCLR("tlbie %0,1", PPC_TLBIE(%1,%0), %2) |
Paul Mackerras | 969391c | 2011-06-29 00:26:11 +0000 | [diff] [blame] | 64 | : : "r" (va), "r"(0), "i" (CPU_FTR_ARCH_206) |
Milton Miller | 60dbf43 | 2009-04-29 20:58:01 +0000 | [diff] [blame] | 65 | : "memory"); |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 66 | break; |
| 67 | } |
| 68 | } |
| 69 | |
Paul Mackerras | 1189be6 | 2007-10-11 20:37:10 +1000 | [diff] [blame] | 70 | static inline void __tlbiel(unsigned long va, int psize, int ssize) |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 71 | { |
| 72 | unsigned int penc; |
| 73 | |
| 74 | /* clear top 16 bits, non SLS segment */ |
| 75 | va &= ~(0xffffULL << 48); |
| 76 | |
| 77 | switch (psize) { |
| 78 | case MMU_PAGE_4K: |
| 79 | va &= ~0xffful; |
Paul Mackerras | 1189be6 | 2007-10-11 20:37:10 +1000 | [diff] [blame] | 80 | va |= ssize << 8; |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 81 | asm volatile(".long 0x7c000224 | (%0 << 11) | (0 << 21)" |
| 82 | : : "r"(va) : "memory"); |
| 83 | break; |
| 84 | default: |
| 85 | penc = mmu_psize_defs[psize].penc; |
| 86 | va &= ~((1ul << mmu_psize_defs[psize].shift) - 1); |
Arnd Bergmann | 19242b2 | 2006-06-15 21:15:44 +1000 | [diff] [blame] | 87 | va |= penc << 12; |
Paul Mackerras | 1189be6 | 2007-10-11 20:37:10 +1000 | [diff] [blame] | 88 | va |= ssize << 8; |
Milton Miller | 60dbf43 | 2009-04-29 20:58:01 +0000 | [diff] [blame] | 89 | va |= 1; /* L */ |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 90 | asm volatile(".long 0x7c000224 | (%0 << 11) | (1 << 21)" |
| 91 | : : "r"(va) : "memory"); |
| 92 | break; |
| 93 | } |
| 94 | |
| 95 | } |
| 96 | |
Paul Mackerras | 1189be6 | 2007-10-11 20:37:10 +1000 | [diff] [blame] | 97 | static inline void tlbie(unsigned long va, int psize, int ssize, int local) |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 98 | { |
Matt Evans | 44ae3ab | 2011-04-06 19:48:50 +0000 | [diff] [blame] | 99 | unsigned int use_local = local && mmu_has_feature(MMU_FTR_TLBIEL); |
| 100 | int lock_tlbie = !mmu_has_feature(MMU_FTR_LOCKLESS_TLBIE); |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 101 | |
| 102 | if (use_local) |
| 103 | use_local = mmu_psize_defs[psize].tlbiel; |
| 104 | if (lock_tlbie && !use_local) |
Thomas Gleixner | 6b9c9b8 | 2010-02-18 02:22:35 +0000 | [diff] [blame] | 105 | raw_spin_lock(&native_tlbie_lock); |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 106 | asm volatile("ptesync": : :"memory"); |
| 107 | if (use_local) { |
Paul Mackerras | 1189be6 | 2007-10-11 20:37:10 +1000 | [diff] [blame] | 108 | __tlbiel(va, psize, ssize); |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 109 | asm volatile("ptesync": : :"memory"); |
| 110 | } else { |
Paul Mackerras | 1189be6 | 2007-10-11 20:37:10 +1000 | [diff] [blame] | 111 | __tlbie(va, psize, ssize); |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 112 | asm volatile("eieio; tlbsync; ptesync": : :"memory"); |
| 113 | } |
| 114 | if (lock_tlbie && !use_local) |
Thomas Gleixner | 6b9c9b8 | 2010-02-18 02:22:35 +0000 | [diff] [blame] | 115 | raw_spin_unlock(&native_tlbie_lock); |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 116 | } |
| 117 | |
David Gibson | 8e561e7 | 2007-06-13 14:52:56 +1000 | [diff] [blame] | 118 | static inline void native_lock_hpte(struct hash_pte *hptep) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 119 | { |
David Gibson | 96e2844 | 2005-07-13 01:11:42 -0700 | [diff] [blame] | 120 | unsigned long *word = &hptep->v; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | |
| 122 | while (1) { |
Anton Blanchard | 66d99b8 | 2010-02-10 01:03:06 +0000 | [diff] [blame] | 123 | if (!test_and_set_bit_lock(HPTE_LOCK_BIT, word)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | break; |
| 125 | while(test_bit(HPTE_LOCK_BIT, word)) |
| 126 | cpu_relax(); |
| 127 | } |
| 128 | } |
| 129 | |
David Gibson | 8e561e7 | 2007-06-13 14:52:56 +1000 | [diff] [blame] | 130 | static inline void native_unlock_hpte(struct hash_pte *hptep) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 131 | { |
David Gibson | 96e2844 | 2005-07-13 01:11:42 -0700 | [diff] [blame] | 132 | unsigned long *word = &hptep->v; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 133 | |
Anton Blanchard | 66d99b8 | 2010-02-10 01:03:06 +0000 | [diff] [blame] | 134 | clear_bit_unlock(HPTE_LOCK_BIT, word); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 135 | } |
| 136 | |
Geoff Levand | 035223f | 2006-10-05 11:35:10 -0700 | [diff] [blame] | 137 | static long native_hpte_insert(unsigned long hpte_group, unsigned long va, |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 138 | unsigned long pa, unsigned long rflags, |
Paul Mackerras | 1189be6 | 2007-10-11 20:37:10 +1000 | [diff] [blame] | 139 | unsigned long vflags, int psize, int ssize) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 140 | { |
David Gibson | 8e561e7 | 2007-06-13 14:52:56 +1000 | [diff] [blame] | 141 | struct hash_pte *hptep = htab_address + hpte_group; |
David Gibson | 96e2844 | 2005-07-13 01:11:42 -0700 | [diff] [blame] | 142 | unsigned long hpte_v, hpte_r; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | int i; |
| 144 | |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 145 | if (!(vflags & HPTE_V_BOLTED)) { |
| 146 | DBG_LOW(" insert(group=%lx, va=%016lx, pa=%016lx," |
| 147 | " rflags=%lx, vflags=%lx, psize=%d)\n", |
| 148 | hpte_group, va, pa, rflags, vflags, psize); |
| 149 | } |
| 150 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 151 | for (i = 0; i < HPTES_PER_GROUP; i++) { |
David Gibson | 96e2844 | 2005-07-13 01:11:42 -0700 | [diff] [blame] | 152 | if (! (hptep->v & HPTE_V_VALID)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 153 | /* retry with lock held */ |
| 154 | native_lock_hpte(hptep); |
David Gibson | 96e2844 | 2005-07-13 01:11:42 -0700 | [diff] [blame] | 155 | if (! (hptep->v & HPTE_V_VALID)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 156 | break; |
| 157 | native_unlock_hpte(hptep); |
| 158 | } |
| 159 | |
| 160 | hptep++; |
| 161 | } |
| 162 | |
| 163 | if (i == HPTES_PER_GROUP) |
| 164 | return -1; |
| 165 | |
Paul Mackerras | 1189be6 | 2007-10-11 20:37:10 +1000 | [diff] [blame] | 166 | hpte_v = hpte_encode_v(va, psize, ssize) | vflags | HPTE_V_VALID; |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 167 | hpte_r = hpte_encode_r(pa, psize) | rflags; |
| 168 | |
| 169 | if (!(vflags & HPTE_V_BOLTED)) { |
| 170 | DBG_LOW(" i=%x hpte_v=%016lx, hpte_r=%016lx\n", |
| 171 | i, hpte_v, hpte_r); |
| 172 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | |
David Gibson | 96e2844 | 2005-07-13 01:11:42 -0700 | [diff] [blame] | 174 | hptep->r = hpte_r; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 175 | /* Guarantee the second dword is visible before the valid bit */ |
Kumar Gala | 74a0ba6 | 2007-07-09 23:49:09 -0500 | [diff] [blame] | 176 | eieio(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | /* |
| 178 | * Now set the first dword including the valid bit |
| 179 | * NOTE: this also unlocks the hpte |
| 180 | */ |
David Gibson | 96e2844 | 2005-07-13 01:11:42 -0700 | [diff] [blame] | 181 | hptep->v = hpte_v; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 182 | |
| 183 | __asm__ __volatile__ ("ptesync" : : : "memory"); |
| 184 | |
David Gibson | 96e2844 | 2005-07-13 01:11:42 -0700 | [diff] [blame] | 185 | return i | (!!(vflags & HPTE_V_SECONDARY) << 3); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | } |
| 187 | |
| 188 | static long native_hpte_remove(unsigned long hpte_group) |
| 189 | { |
David Gibson | 8e561e7 | 2007-06-13 14:52:56 +1000 | [diff] [blame] | 190 | struct hash_pte *hptep; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 191 | int i; |
| 192 | int slot_offset; |
David Gibson | 96e2844 | 2005-07-13 01:11:42 -0700 | [diff] [blame] | 193 | unsigned long hpte_v; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 194 | |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 195 | DBG_LOW(" remove(group=%lx)\n", hpte_group); |
| 196 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 197 | /* pick a random entry to start at */ |
| 198 | slot_offset = mftb() & 0x7; |
| 199 | |
| 200 | for (i = 0; i < HPTES_PER_GROUP; i++) { |
| 201 | hptep = htab_address + hpte_group + slot_offset; |
David Gibson | 96e2844 | 2005-07-13 01:11:42 -0700 | [diff] [blame] | 202 | hpte_v = hptep->v; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 203 | |
David Gibson | 96e2844 | 2005-07-13 01:11:42 -0700 | [diff] [blame] | 204 | if ((hpte_v & HPTE_V_VALID) && !(hpte_v & HPTE_V_BOLTED)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 205 | /* retry with lock held */ |
| 206 | native_lock_hpte(hptep); |
David Gibson | 96e2844 | 2005-07-13 01:11:42 -0700 | [diff] [blame] | 207 | hpte_v = hptep->v; |
| 208 | if ((hpte_v & HPTE_V_VALID) |
| 209 | && !(hpte_v & HPTE_V_BOLTED)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 210 | break; |
| 211 | native_unlock_hpte(hptep); |
| 212 | } |
| 213 | |
| 214 | slot_offset++; |
| 215 | slot_offset &= 0x7; |
| 216 | } |
| 217 | |
| 218 | if (i == HPTES_PER_GROUP) |
| 219 | return -1; |
| 220 | |
| 221 | /* Invalidate the hpte. NOTE: this also unlocks it */ |
David Gibson | 96e2844 | 2005-07-13 01:11:42 -0700 | [diff] [blame] | 222 | hptep->v = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 223 | |
| 224 | return i; |
| 225 | } |
| 226 | |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 227 | static long native_hpte_updatepp(unsigned long slot, unsigned long newpp, |
Paul Mackerras | 1189be6 | 2007-10-11 20:37:10 +1000 | [diff] [blame] | 228 | unsigned long va, int psize, int ssize, |
| 229 | int local) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 230 | { |
David Gibson | 8e561e7 | 2007-06-13 14:52:56 +1000 | [diff] [blame] | 231 | struct hash_pte *hptep = htab_address + slot; |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 232 | unsigned long hpte_v, want_v; |
| 233 | int ret = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | |
Paul Mackerras | 1189be6 | 2007-10-11 20:37:10 +1000 | [diff] [blame] | 235 | want_v = hpte_encode_v(va, psize, ssize); |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 236 | |
| 237 | DBG_LOW(" update(va=%016lx, avpnv=%016lx, hash=%016lx, newpp=%x)", |
| 238 | va, want_v & HPTE_V_AVPN, slot, newpp); |
| 239 | |
| 240 | native_lock_hpte(hptep); |
| 241 | |
| 242 | hpte_v = hptep->v; |
| 243 | |
| 244 | /* Even if we miss, we need to invalidate the TLB */ |
| 245 | if (!HPTE_V_COMPARE(hpte_v, want_v) || !(hpte_v & HPTE_V_VALID)) { |
| 246 | DBG_LOW(" -> miss\n"); |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 247 | ret = -1; |
| 248 | } else { |
| 249 | DBG_LOW(" -> hit\n"); |
| 250 | /* Update the HPTE */ |
| 251 | hptep->r = (hptep->r & ~(HPTE_R_PP | HPTE_R_N)) | |
Benjamin Herrenschmidt | c5cf0e3 | 2006-05-30 14:14:19 +1000 | [diff] [blame] | 252 | (newpp & (HPTE_R_PP | HPTE_R_N | HPTE_R_C)); |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 253 | } |
Jon Tollefson | 3f1df7a | 2007-05-18 04:49:22 +1000 | [diff] [blame] | 254 | native_unlock_hpte(hptep); |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 255 | |
| 256 | /* Ensure it is out of the tlb too. */ |
Paul Mackerras | 1189be6 | 2007-10-11 20:37:10 +1000 | [diff] [blame] | 257 | tlbie(va, psize, ssize, local); |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 258 | |
| 259 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 260 | } |
| 261 | |
Paul Mackerras | 1189be6 | 2007-10-11 20:37:10 +1000 | [diff] [blame] | 262 | static long native_hpte_find(unsigned long va, int psize, int ssize) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 263 | { |
David Gibson | 8e561e7 | 2007-06-13 14:52:56 +1000 | [diff] [blame] | 264 | struct hash_pte *hptep; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 265 | unsigned long hash; |
Paul Mackerras | 1189be6 | 2007-10-11 20:37:10 +1000 | [diff] [blame] | 266 | unsigned long i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 267 | long slot; |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 268 | unsigned long want_v, hpte_v; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | |
Paul Mackerras | 1189be6 | 2007-10-11 20:37:10 +1000 | [diff] [blame] | 270 | hash = hpt_hash(va, mmu_psize_defs[psize].shift, ssize); |
| 271 | want_v = hpte_encode_v(va, psize, ssize); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 272 | |
Paul Mackerras | 1189be6 | 2007-10-11 20:37:10 +1000 | [diff] [blame] | 273 | /* Bolted mappings are only ever in the primary group */ |
| 274 | slot = (hash & htab_hash_mask) * HPTES_PER_GROUP; |
| 275 | for (i = 0; i < HPTES_PER_GROUP; i++) { |
| 276 | hptep = htab_address + slot; |
| 277 | hpte_v = hptep->v; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 278 | |
Paul Mackerras | 1189be6 | 2007-10-11 20:37:10 +1000 | [diff] [blame] | 279 | if (HPTE_V_COMPARE(hpte_v, want_v) && (hpte_v & HPTE_V_VALID)) |
| 280 | /* HPTE matches */ |
| 281 | return slot; |
| 282 | ++slot; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 283 | } |
| 284 | |
| 285 | return -1; |
| 286 | } |
| 287 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 288 | /* |
| 289 | * Update the page protection bits. Intended to be used to create |
| 290 | * guard pages for kernel data structures on pages which are bolted |
| 291 | * in the HPT. Assumes pages being operated on will not be stolen. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 292 | * |
| 293 | * No need to lock here because we should be the only user. |
| 294 | */ |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 295 | static void native_hpte_updateboltedpp(unsigned long newpp, unsigned long ea, |
Paul Mackerras | 1189be6 | 2007-10-11 20:37:10 +1000 | [diff] [blame] | 296 | int psize, int ssize) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 297 | { |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 298 | unsigned long vsid, va; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 299 | long slot; |
David Gibson | 8e561e7 | 2007-06-13 14:52:56 +1000 | [diff] [blame] | 300 | struct hash_pte *hptep; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 301 | |
Paul Mackerras | 1189be6 | 2007-10-11 20:37:10 +1000 | [diff] [blame] | 302 | vsid = get_kernel_vsid(ea, ssize); |
| 303 | va = hpt_va(ea, vsid, ssize); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 304 | |
Paul Mackerras | 1189be6 | 2007-10-11 20:37:10 +1000 | [diff] [blame] | 305 | slot = native_hpte_find(va, psize, ssize); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 306 | if (slot == -1) |
| 307 | panic("could not find page to bolt\n"); |
| 308 | hptep = htab_address + slot; |
| 309 | |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 310 | /* Update the HPTE */ |
| 311 | hptep->r = (hptep->r & ~(HPTE_R_PP | HPTE_R_N)) | |
| 312 | (newpp & (HPTE_R_PP | HPTE_R_N)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 313 | |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 314 | /* Ensure it is out of the tlb too. */ |
Paul Mackerras | 1189be6 | 2007-10-11 20:37:10 +1000 | [diff] [blame] | 315 | tlbie(va, psize, ssize, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 316 | } |
| 317 | |
| 318 | static void native_hpte_invalidate(unsigned long slot, unsigned long va, |
Paul Mackerras | 1189be6 | 2007-10-11 20:37:10 +1000 | [diff] [blame] | 319 | int psize, int ssize, int local) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 320 | { |
David Gibson | 8e561e7 | 2007-06-13 14:52:56 +1000 | [diff] [blame] | 321 | struct hash_pte *hptep = htab_address + slot; |
David Gibson | 96e2844 | 2005-07-13 01:11:42 -0700 | [diff] [blame] | 322 | unsigned long hpte_v; |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 323 | unsigned long want_v; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 324 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 325 | |
| 326 | local_irq_save(flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 327 | |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 328 | DBG_LOW(" invalidate(va=%016lx, hash: %x)\n", va, slot); |
| 329 | |
Paul Mackerras | 1189be6 | 2007-10-11 20:37:10 +1000 | [diff] [blame] | 330 | want_v = hpte_encode_v(va, psize, ssize); |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 331 | native_lock_hpte(hptep); |
David Gibson | 96e2844 | 2005-07-13 01:11:42 -0700 | [diff] [blame] | 332 | hpte_v = hptep->v; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 333 | |
| 334 | /* Even if we miss, we need to invalidate the TLB */ |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 335 | if (!HPTE_V_COMPARE(hpte_v, want_v) || !(hpte_v & HPTE_V_VALID)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 336 | native_unlock_hpte(hptep); |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 337 | else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 338 | /* Invalidate the hpte. NOTE: this also unlocks it */ |
David Gibson | 96e2844 | 2005-07-13 01:11:42 -0700 | [diff] [blame] | 339 | hptep->v = 0; |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 340 | |
| 341 | /* Invalidate the TLB */ |
Paul Mackerras | 1189be6 | 2007-10-11 20:37:10 +1000 | [diff] [blame] | 342 | tlbie(va, psize, ssize, local); |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 343 | |
| 344 | local_irq_restore(flags); |
| 345 | } |
| 346 | |
Luke Browning | 71bf08b | 2007-05-03 00:19:11 +1000 | [diff] [blame] | 347 | #define LP_SHIFT 12 |
| 348 | #define LP_BITS 8 |
| 349 | #define LP_MASK(i) ((0xFF >> (i)) << LP_SHIFT) |
| 350 | |
David Gibson | 8e561e7 | 2007-06-13 14:52:56 +1000 | [diff] [blame] | 351 | static void hpte_decode(struct hash_pte *hpte, unsigned long slot, |
Paul Mackerras | 1189be6 | 2007-10-11 20:37:10 +1000 | [diff] [blame] | 352 | int *psize, int *ssize, unsigned long *va) |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 353 | { |
Aneesh Kumar K.V | dcda287 | 2012-09-10 02:52:49 +0000 | [diff] [blame^] | 354 | unsigned long avpn, pteg, vpi; |
Luke Browning | 71bf08b | 2007-05-03 00:19:11 +1000 | [diff] [blame] | 355 | unsigned long hpte_r = hpte->r; |
| 356 | unsigned long hpte_v = hpte->v; |
Aneesh Kumar K.V | dcda287 | 2012-09-10 02:52:49 +0000 | [diff] [blame^] | 357 | unsigned long vsid, seg_off; |
Stephen Rothwell | 8980ae8 | 2007-05-11 15:38:34 +1000 | [diff] [blame] | 358 | int i, size, shift, penc; |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 359 | |
Luke Browning | 71bf08b | 2007-05-03 00:19:11 +1000 | [diff] [blame] | 360 | if (!(hpte_v & HPTE_V_LARGE)) |
| 361 | size = MMU_PAGE_4K; |
| 362 | else { |
| 363 | for (i = 0; i < LP_BITS; i++) { |
| 364 | if ((hpte_r & LP_MASK(i+1)) == LP_MASK(i+1)) |
| 365 | break; |
| 366 | } |
| 367 | penc = LP_MASK(i+1) >> LP_SHIFT; |
| 368 | for (size = 0; size < MMU_PAGE_COUNT; size++) { |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 369 | |
Luke Browning | 71bf08b | 2007-05-03 00:19:11 +1000 | [diff] [blame] | 370 | /* 4K pages are not represented by LP */ |
| 371 | if (size == MMU_PAGE_4K) |
| 372 | continue; |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 373 | |
Luke Browning | 71bf08b | 2007-05-03 00:19:11 +1000 | [diff] [blame] | 374 | /* valid entries have a shift value */ |
| 375 | if (!mmu_psize_defs[size].shift) |
| 376 | continue; |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 377 | |
Luke Browning | 71bf08b | 2007-05-03 00:19:11 +1000 | [diff] [blame] | 378 | if (penc == mmu_psize_defs[size].penc) |
| 379 | break; |
| 380 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 381 | } |
| 382 | |
Paul Mackerras | 2454c7e | 2007-05-10 15:28:44 +1000 | [diff] [blame] | 383 | /* This works for all page sizes, and for 256M and 1T segments */ |
Paul Mackerras | 1189be6 | 2007-10-11 20:37:10 +1000 | [diff] [blame] | 384 | *ssize = hpte_v >> HPTE_V_SSIZE_SHIFT; |
Aneesh Kumar K.V | dcda287 | 2012-09-10 02:52:49 +0000 | [diff] [blame^] | 385 | shift = mmu_psize_defs[size].shift; |
| 386 | |
| 387 | avpn = (HPTE_V_AVPN_VAL(hpte_v) & ~mmu_psize_defs[size].avpnm); |
| 388 | pteg = slot / HPTES_PER_GROUP; |
| 389 | if (hpte_v & HPTE_V_SECONDARY) |
| 390 | pteg = ~pteg; |
| 391 | |
| 392 | switch (*ssize) { |
| 393 | case MMU_SEGSIZE_256M: |
| 394 | /* We only have 28 - 23 bits of seg_off in avpn */ |
| 395 | seg_off = (avpn & 0x1f) << 23; |
| 396 | vsid = avpn >> 5; |
| 397 | /* We can find more bits from the pteg value */ |
| 398 | if (shift < 23) { |
| 399 | vpi = (vsid ^ pteg) & htab_hash_mask; |
| 400 | seg_off |= vpi << shift; |
| 401 | } |
| 402 | *va = vsid << SID_SHIFT | seg_off; |
| 403 | case MMU_SEGSIZE_1T: |
| 404 | /* We only have 40 - 23 bits of seg_off in avpn */ |
| 405 | seg_off = (avpn & 0x1ffff) << 23; |
| 406 | vsid = avpn >> 17; |
| 407 | if (shift < 23) { |
| 408 | vpi = (vsid ^ (vsid << 25) ^ pteg) & htab_hash_mask; |
| 409 | seg_off |= vpi << shift; |
| 410 | } |
| 411 | *va = vsid << SID_SHIFT_1T | seg_off; |
| 412 | default: |
| 413 | *va = size = 0; |
| 414 | } |
| 415 | *psize = size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 416 | } |
| 417 | |
R Sharada | f4c82d5 | 2005-06-25 14:58:08 -0700 | [diff] [blame] | 418 | /* |
| 419 | * clear all mappings on kexec. All cpus are in real mode (or they will |
| 420 | * be when they isi), and we are the only one left. We rely on our kernel |
| 421 | * mapping being 0xC0's and the hardware ignoring those two real bits. |
| 422 | * |
| 423 | * TODO: add batching support when enabled. remember, no dynamic memory here, |
| 424 | * athough there is the control page available... |
| 425 | */ |
| 426 | static void native_hpte_clear(void) |
| 427 | { |
| 428 | unsigned long slot, slots, flags; |
David Gibson | 8e561e7 | 2007-06-13 14:52:56 +1000 | [diff] [blame] | 429 | struct hash_pte *hptep = htab_address; |
Luke Browning | 71bf08b | 2007-05-03 00:19:11 +1000 | [diff] [blame] | 430 | unsigned long hpte_v, va; |
R Sharada | f4c82d5 | 2005-06-25 14:58:08 -0700 | [diff] [blame] | 431 | unsigned long pteg_count; |
Paul Mackerras | 1189be6 | 2007-10-11 20:37:10 +1000 | [diff] [blame] | 432 | int psize, ssize; |
R Sharada | f4c82d5 | 2005-06-25 14:58:08 -0700 | [diff] [blame] | 433 | |
| 434 | pteg_count = htab_hash_mask + 1; |
| 435 | |
| 436 | local_irq_save(flags); |
| 437 | |
| 438 | /* we take the tlbie lock and hold it. Some hardware will |
| 439 | * deadlock if we try to tlbie from two processors at once. |
| 440 | */ |
Thomas Gleixner | 6b9c9b8 | 2010-02-18 02:22:35 +0000 | [diff] [blame] | 441 | raw_spin_lock(&native_tlbie_lock); |
R Sharada | f4c82d5 | 2005-06-25 14:58:08 -0700 | [diff] [blame] | 442 | |
| 443 | slots = pteg_count * HPTES_PER_GROUP; |
| 444 | |
| 445 | for (slot = 0; slot < slots; slot++, hptep++) { |
| 446 | /* |
| 447 | * we could lock the pte here, but we are the only cpu |
| 448 | * running, right? and for crash dump, we probably |
| 449 | * don't want to wait for a maybe bad cpu. |
| 450 | */ |
David Gibson | 96e2844 | 2005-07-13 01:11:42 -0700 | [diff] [blame] | 451 | hpte_v = hptep->v; |
R Sharada | f4c82d5 | 2005-06-25 14:58:08 -0700 | [diff] [blame] | 452 | |
R Sharada | 47f78a4 | 2006-02-22 21:43:08 +0530 | [diff] [blame] | 453 | /* |
| 454 | * Call __tlbie() here rather than tlbie() since we |
| 455 | * already hold the native_tlbie_lock. |
| 456 | */ |
David Gibson | 96e2844 | 2005-07-13 01:11:42 -0700 | [diff] [blame] | 457 | if (hpte_v & HPTE_V_VALID) { |
Paul Mackerras | 1189be6 | 2007-10-11 20:37:10 +1000 | [diff] [blame] | 458 | hpte_decode(hptep, slot, &psize, &ssize, &va); |
David Gibson | 96e2844 | 2005-07-13 01:11:42 -0700 | [diff] [blame] | 459 | hptep->v = 0; |
Paul Mackerras | 1189be6 | 2007-10-11 20:37:10 +1000 | [diff] [blame] | 460 | __tlbie(va, psize, ssize); |
R Sharada | f4c82d5 | 2005-06-25 14:58:08 -0700 | [diff] [blame] | 461 | } |
| 462 | } |
| 463 | |
R Sharada | 47f78a4 | 2006-02-22 21:43:08 +0530 | [diff] [blame] | 464 | asm volatile("eieio; tlbsync; ptesync":::"memory"); |
Thomas Gleixner | 6b9c9b8 | 2010-02-18 02:22:35 +0000 | [diff] [blame] | 465 | raw_spin_unlock(&native_tlbie_lock); |
R Sharada | f4c82d5 | 2005-06-25 14:58:08 -0700 | [diff] [blame] | 466 | local_irq_restore(flags); |
| 467 | } |
| 468 | |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 469 | /* |
| 470 | * Batched hash table flush, we batch the tlbie's to avoid taking/releasing |
| 471 | * the lock all the time |
| 472 | */ |
Benjamin Herrenschmidt | 61b1a94 | 2005-09-20 13:52:50 +1000 | [diff] [blame] | 473 | static void native_flush_hash_range(unsigned long number, int local) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 474 | { |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 475 | unsigned long va, hash, index, hidx, shift, slot; |
David Gibson | 8e561e7 | 2007-06-13 14:52:56 +1000 | [diff] [blame] | 476 | struct hash_pte *hptep; |
David Gibson | 96e2844 | 2005-07-13 01:11:42 -0700 | [diff] [blame] | 477 | unsigned long hpte_v; |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 478 | unsigned long want_v; |
| 479 | unsigned long flags; |
| 480 | real_pte_t pte; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 481 | struct ppc64_tlb_batch *batch = &__get_cpu_var(ppc64_tlb_batch); |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 482 | unsigned long psize = batch->psize; |
Paul Mackerras | 1189be6 | 2007-10-11 20:37:10 +1000 | [diff] [blame] | 483 | int ssize = batch->ssize; |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 484 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 485 | |
| 486 | local_irq_save(flags); |
| 487 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 488 | for (i = 0; i < number; i++) { |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 489 | va = batch->vaddr[i]; |
| 490 | pte = batch->pte[i]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 491 | |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 492 | pte_iterate_hashed_subpages(pte, psize, va, index, shift) { |
Paul Mackerras | 1189be6 | 2007-10-11 20:37:10 +1000 | [diff] [blame] | 493 | hash = hpt_hash(va, shift, ssize); |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 494 | hidx = __rpte_to_hidx(pte, index); |
| 495 | if (hidx & _PTEIDX_SECONDARY) |
| 496 | hash = ~hash; |
| 497 | slot = (hash & htab_hash_mask) * HPTES_PER_GROUP; |
| 498 | slot += hidx & _PTEIDX_GROUP_IX; |
| 499 | hptep = htab_address + slot; |
Paul Mackerras | 1189be6 | 2007-10-11 20:37:10 +1000 | [diff] [blame] | 500 | want_v = hpte_encode_v(va, psize, ssize); |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 501 | native_lock_hpte(hptep); |
| 502 | hpte_v = hptep->v; |
| 503 | if (!HPTE_V_COMPARE(hpte_v, want_v) || |
| 504 | !(hpte_v & HPTE_V_VALID)) |
| 505 | native_unlock_hpte(hptep); |
| 506 | else |
| 507 | hptep->v = 0; |
| 508 | } pte_iterate_hashed_end(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 509 | } |
| 510 | |
Matt Evans | 44ae3ab | 2011-04-06 19:48:50 +0000 | [diff] [blame] | 511 | if (mmu_has_feature(MMU_FTR_TLBIEL) && |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 512 | mmu_psize_defs[psize].tlbiel && local) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 513 | asm volatile("ptesync":::"memory"); |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 514 | for (i = 0; i < number; i++) { |
| 515 | va = batch->vaddr[i]; |
| 516 | pte = batch->pte[i]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 517 | |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 518 | pte_iterate_hashed_subpages(pte, psize, va, index, |
| 519 | shift) { |
Paul Mackerras | 1189be6 | 2007-10-11 20:37:10 +1000 | [diff] [blame] | 520 | __tlbiel(va, psize, ssize); |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 521 | } pte_iterate_hashed_end(); |
| 522 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 523 | asm volatile("ptesync":::"memory"); |
| 524 | } else { |
Matt Evans | 44ae3ab | 2011-04-06 19:48:50 +0000 | [diff] [blame] | 525 | int lock_tlbie = !mmu_has_feature(MMU_FTR_LOCKLESS_TLBIE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 526 | |
| 527 | if (lock_tlbie) |
Thomas Gleixner | 6b9c9b8 | 2010-02-18 02:22:35 +0000 | [diff] [blame] | 528 | raw_spin_lock(&native_tlbie_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 529 | |
| 530 | asm volatile("ptesync":::"memory"); |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 531 | for (i = 0; i < number; i++) { |
| 532 | va = batch->vaddr[i]; |
| 533 | pte = batch->pte[i]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 534 | |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 535 | pte_iterate_hashed_subpages(pte, psize, va, index, |
| 536 | shift) { |
Paul Mackerras | 1189be6 | 2007-10-11 20:37:10 +1000 | [diff] [blame] | 537 | __tlbie(va, psize, ssize); |
Benjamin Herrenschmidt | 3c726f8 | 2005-11-07 11:06:55 +1100 | [diff] [blame] | 538 | } pte_iterate_hashed_end(); |
| 539 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 540 | asm volatile("eieio; tlbsync; ptesync":::"memory"); |
| 541 | |
| 542 | if (lock_tlbie) |
Thomas Gleixner | 6b9c9b8 | 2010-02-18 02:22:35 +0000 | [diff] [blame] | 543 | raw_spin_unlock(&native_tlbie_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 544 | } |
| 545 | |
| 546 | local_irq_restore(flags); |
| 547 | } |
| 548 | |
| 549 | #ifdef CONFIG_PPC_PSERIES |
| 550 | /* Disable TLB batching on nighthawk */ |
| 551 | static inline int tlb_batching_enabled(void) |
| 552 | { |
| 553 | struct device_node *root = of_find_node_by_path("/"); |
| 554 | int enabled = 1; |
| 555 | |
| 556 | if (root) { |
Stephen Rothwell | e2eb639 | 2007-04-03 22:26:41 +1000 | [diff] [blame] | 557 | const char *model = of_get_property(root, "model", NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 558 | if (model && !strcmp(model, "IBM,9076-N81")) |
| 559 | enabled = 0; |
| 560 | of_node_put(root); |
| 561 | } |
| 562 | |
| 563 | return enabled; |
| 564 | } |
| 565 | #else |
| 566 | static inline int tlb_batching_enabled(void) |
| 567 | { |
| 568 | return 1; |
| 569 | } |
| 570 | #endif |
| 571 | |
Michael Ellerman | 7d0daae | 2006-06-23 18:16:38 +1000 | [diff] [blame] | 572 | void __init hpte_init_native(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 573 | { |
| 574 | ppc_md.hpte_invalidate = native_hpte_invalidate; |
| 575 | ppc_md.hpte_updatepp = native_hpte_updatepp; |
| 576 | ppc_md.hpte_updateboltedpp = native_hpte_updateboltedpp; |
| 577 | ppc_md.hpte_insert = native_hpte_insert; |
R Sharada | f4c82d5 | 2005-06-25 14:58:08 -0700 | [diff] [blame] | 578 | ppc_md.hpte_remove = native_hpte_remove; |
| 579 | ppc_md.hpte_clear_all = native_hpte_clear; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 580 | if (tlb_batching_enabled()) |
| 581 | ppc_md.flush_hash_range = native_flush_hash_range; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 582 | } |