| 1 | /*
|
|---|
| 2 | * Software MMU support
|
|---|
| 3 | *
|
|---|
| 4 | * Copyright (c) 2003 Fabrice Bellard
|
|---|
| 5 | *
|
|---|
| 6 | * This library is free software; you can redistribute it and/or
|
|---|
| 7 | * modify it under the terms of the GNU Lesser General Public
|
|---|
| 8 | * License as published by the Free Software Foundation; either
|
|---|
| 9 | * version 2 of the License, or (at your option) any later version.
|
|---|
| 10 | *
|
|---|
| 11 | * This library is distributed in the hope that it will be useful,
|
|---|
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|---|
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|---|
| 14 | * Lesser General Public License for more details.
|
|---|
| 15 | *
|
|---|
| 16 | * You should have received a copy of the GNU Lesser General Public
|
|---|
| 17 | * License along with this library; if not, write to the Free Software
|
|---|
| 18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|---|
| 19 | */
|
|---|
| 20 |
|
|---|
| 21 | /*
|
|---|
| 22 | * Sun LGPL Disclaimer: For the avoidance of doubt, except that if any license choice
|
|---|
| 23 | * other than GPL or LGPL is available it will apply instead, Sun elects to use only
|
|---|
| 24 | * the Lesser General Public License version 2.1 (LGPLv2) at this time for any software where
|
|---|
| 25 | * a choice of LGPL license versions is made available with the language indicating
|
|---|
| 26 | * that LGPLv2 or any later version may be used, or where a choice of which version
|
|---|
| 27 | * of the LGPL is applied is otherwise unspecified.
|
|---|
| 28 | */
|
|---|
| 29 | #define DATA_SIZE (1 << SHIFT)
|
|---|
| 30 |
|
|---|
| 31 | #if DATA_SIZE == 8
|
|---|
| 32 | #define SUFFIX q
|
|---|
| 33 | #define USUFFIX q
|
|---|
| 34 | #define DATA_TYPE uint64_t
|
|---|
| 35 | #elif DATA_SIZE == 4
|
|---|
| 36 | #define SUFFIX l
|
|---|
| 37 | #define USUFFIX l
|
|---|
| 38 | #define DATA_TYPE uint32_t
|
|---|
| 39 | #elif DATA_SIZE == 2
|
|---|
| 40 | #define SUFFIX w
|
|---|
| 41 | #define USUFFIX uw
|
|---|
| 42 | #define DATA_TYPE uint16_t
|
|---|
| 43 | #elif DATA_SIZE == 1
|
|---|
| 44 | #define SUFFIX b
|
|---|
| 45 | #define USUFFIX ub
|
|---|
| 46 | #define DATA_TYPE uint8_t
|
|---|
| 47 | #else
|
|---|
| 48 | #error unsupported data size
|
|---|
| 49 | #endif
|
|---|
| 50 |
|
|---|
| 51 | #ifdef SOFTMMU_CODE_ACCESS
|
|---|
| 52 | #define READ_ACCESS_TYPE 2
|
|---|
| 53 | #define ADDR_READ addr_code
|
|---|
| 54 | #else
|
|---|
| 55 | #define READ_ACCESS_TYPE 0
|
|---|
| 56 | #define ADDR_READ addr_read
|
|---|
| 57 | #endif
|
|---|
| 58 |
|
|---|
| 59 | static DATA_TYPE glue(glue(slow_ld, SUFFIX), MMUSUFFIX)(target_ulong addr,
|
|---|
| 60 | int is_user,
|
|---|
| 61 | void *retaddr);
|
|---|
| 62 | static inline DATA_TYPE glue(io_read, SUFFIX)(target_phys_addr_t physaddr,
|
|---|
| 63 | target_ulong tlb_addr)
|
|---|
| 64 | {
|
|---|
| 65 | DATA_TYPE res;
|
|---|
| 66 | int index;
|
|---|
| 67 |
|
|---|
| 68 | index = (tlb_addr >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
|
|---|
| 69 | #if SHIFT <= 2
|
|---|
| 70 | res = io_mem_read[index][SHIFT](io_mem_opaque[index], physaddr);
|
|---|
| 71 | #else
|
|---|
| 72 | #ifdef TARGET_WORDS_BIGENDIAN
|
|---|
| 73 | res = (uint64_t)io_mem_read[index][2](io_mem_opaque[index], physaddr) << 32;
|
|---|
| 74 | res |= io_mem_read[index][2](io_mem_opaque[index], physaddr + 4);
|
|---|
| 75 | #else
|
|---|
| 76 | res = io_mem_read[index][2](io_mem_opaque[index], physaddr);
|
|---|
| 77 | res |= (uint64_t)io_mem_read[index][2](io_mem_opaque[index], physaddr + 4) << 32;
|
|---|
| 78 | #endif
|
|---|
| 79 | #endif /* SHIFT > 2 */
|
|---|
| 80 | #ifdef USE_KQEMU
|
|---|
| 81 | env->last_io_time = cpu_get_time_fast();
|
|---|
| 82 | #endif
|
|---|
| 83 | return res;
|
|---|
| 84 | }
|
|---|
| 85 |
|
|---|
| 86 | /* handle all cases except unaligned access which span two pages */
|
|---|
| 87 | DATA_TYPE REGPARM(1) glue(glue(__ld, SUFFIX), MMUSUFFIX)(target_ulong addr,
|
|---|
| 88 | int is_user)
|
|---|
| 89 | {
|
|---|
| 90 | DATA_TYPE res;
|
|---|
| 91 | int index;
|
|---|
| 92 | target_ulong tlb_addr;
|
|---|
| 93 | target_phys_addr_t physaddr;
|
|---|
| 94 | void *retaddr;
|
|---|
| 95 |
|
|---|
| 96 | /* test if there is match for unaligned or IO access */
|
|---|
| 97 | /* XXX: could done more in memory macro in a non portable way */
|
|---|
| 98 | index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
|
|---|
| 99 | redo:
|
|---|
| 100 | tlb_addr = env->tlb_table[is_user][index].ADDR_READ;
|
|---|
| 101 | if ((addr & TARGET_PAGE_MASK) == (tlb_addr & (TARGET_PAGE_MASK | TLB_INVALID_MASK))) {
|
|---|
| 102 | physaddr = addr + env->tlb_table[is_user][index].addend;
|
|---|
| 103 | if (tlb_addr & ~TARGET_PAGE_MASK) {
|
|---|
| 104 | /* IO access */
|
|---|
| 105 | if ((addr & (DATA_SIZE - 1)) != 0)
|
|---|
| 106 | goto do_unaligned_access;
|
|---|
| 107 | res = glue(io_read, SUFFIX)(physaddr, tlb_addr);
|
|---|
| 108 | } else if (((addr & ~TARGET_PAGE_MASK) + DATA_SIZE - 1) >= TARGET_PAGE_SIZE) {
|
|---|
| 109 | /* slow unaligned access (it spans two pages or IO) */
|
|---|
| 110 | do_unaligned_access:
|
|---|
| 111 | retaddr = GETPC();
|
|---|
| 112 | #ifdef ALIGNED_ONLY
|
|---|
| 113 | do_unaligned_access(addr, READ_ACCESS_TYPE, is_user, retaddr);
|
|---|
| 114 | #endif
|
|---|
| 115 | res = glue(glue(slow_ld, SUFFIX), MMUSUFFIX)(addr,
|
|---|
| 116 | is_user, retaddr);
|
|---|
| 117 | } else {
|
|---|
| 118 | /* unaligned/aligned access in the same page */
|
|---|
| 119 | #ifdef ALIGNED_ONLY
|
|---|
| 120 | if ((addr & (DATA_SIZE - 1)) != 0) {
|
|---|
| 121 | retaddr = GETPC();
|
|---|
| 122 | do_unaligned_access(addr, READ_ACCESS_TYPE, is_user, retaddr);
|
|---|
| 123 | }
|
|---|
| 124 | #endif
|
|---|
| 125 | res = glue(glue(ld, USUFFIX), _raw)((uint8_t *)(long)physaddr);
|
|---|
| 126 | }
|
|---|
| 127 | } else {
|
|---|
| 128 | /* the page is not in the TLB : fill it */
|
|---|
| 129 | retaddr = GETPC();
|
|---|
| 130 | #ifdef ALIGNED_ONLY
|
|---|
| 131 | if ((addr & (DATA_SIZE - 1)) != 0)
|
|---|
| 132 | do_unaligned_access(addr, READ_ACCESS_TYPE, is_user, retaddr);
|
|---|
| 133 | #endif
|
|---|
| 134 | tlb_fill(addr, READ_ACCESS_TYPE, is_user, retaddr);
|
|---|
| 135 | goto redo;
|
|---|
| 136 | }
|
|---|
| 137 | return res;
|
|---|
| 138 | }
|
|---|
| 139 |
|
|---|
| 140 | /* handle all unaligned cases */
|
|---|
| 141 | static DATA_TYPE glue(glue(slow_ld, SUFFIX), MMUSUFFIX)(target_ulong addr,
|
|---|
| 142 | int is_user,
|
|---|
| 143 | void *retaddr)
|
|---|
| 144 | {
|
|---|
| 145 | DATA_TYPE res, res1, res2;
|
|---|
| 146 | int index, shift;
|
|---|
| 147 | target_phys_addr_t physaddr;
|
|---|
| 148 | target_ulong tlb_addr, addr1, addr2;
|
|---|
| 149 |
|
|---|
| 150 | index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
|
|---|
| 151 | redo:
|
|---|
| 152 | tlb_addr = env->tlb_table[is_user][index].ADDR_READ;
|
|---|
| 153 | if ((addr & TARGET_PAGE_MASK) == (tlb_addr & (TARGET_PAGE_MASK | TLB_INVALID_MASK))) {
|
|---|
| 154 | physaddr = addr + env->tlb_table[is_user][index].addend;
|
|---|
| 155 | if (tlb_addr & ~TARGET_PAGE_MASK) {
|
|---|
| 156 | /* IO access */
|
|---|
| 157 | if ((addr & (DATA_SIZE - 1)) != 0)
|
|---|
| 158 | goto do_unaligned_access;
|
|---|
| 159 | res = glue(io_read, SUFFIX)(physaddr, tlb_addr);
|
|---|
| 160 | } else if (((addr & ~TARGET_PAGE_MASK) + DATA_SIZE - 1) >= TARGET_PAGE_SIZE) {
|
|---|
| 161 | do_unaligned_access:
|
|---|
| 162 | /* slow unaligned access (it spans two pages) */
|
|---|
| 163 | addr1 = addr & ~(DATA_SIZE - 1);
|
|---|
| 164 | addr2 = addr1 + DATA_SIZE;
|
|---|
| 165 | res1 = glue(glue(slow_ld, SUFFIX), MMUSUFFIX)(addr1,
|
|---|
| 166 | is_user, retaddr);
|
|---|
| 167 | res2 = glue(glue(slow_ld, SUFFIX), MMUSUFFIX)(addr2,
|
|---|
| 168 | is_user, retaddr);
|
|---|
| 169 | shift = (addr & (DATA_SIZE - 1)) * 8;
|
|---|
| 170 | #ifdef TARGET_WORDS_BIGENDIAN
|
|---|
| 171 | res = (res1 << shift) | (res2 >> ((DATA_SIZE * 8) - shift));
|
|---|
| 172 | #else
|
|---|
| 173 | res = (res1 >> shift) | (res2 << ((DATA_SIZE * 8) - shift));
|
|---|
| 174 | #endif
|
|---|
| 175 | res = (DATA_TYPE)res;
|
|---|
| 176 | } else {
|
|---|
| 177 | /* unaligned/aligned access in the same page */
|
|---|
| 178 | res = glue(glue(ld, USUFFIX), _raw)((uint8_t *)(long)physaddr);
|
|---|
| 179 | }
|
|---|
| 180 | } else {
|
|---|
| 181 | /* the page is not in the TLB : fill it */
|
|---|
| 182 | tlb_fill(addr, READ_ACCESS_TYPE, is_user, retaddr);
|
|---|
| 183 | goto redo;
|
|---|
| 184 | }
|
|---|
| 185 | return res;
|
|---|
| 186 | }
|
|---|
| 187 |
|
|---|
| 188 | #ifndef SOFTMMU_CODE_ACCESS
|
|---|
| 189 |
|
|---|
| 190 | static void glue(glue(slow_st, SUFFIX), MMUSUFFIX)(target_ulong addr,
|
|---|
| 191 | DATA_TYPE val,
|
|---|
| 192 | int is_user,
|
|---|
| 193 | void *retaddr);
|
|---|
| 194 |
|
|---|
| 195 | static inline void glue(io_write, SUFFIX)(target_phys_addr_t physaddr,
|
|---|
| 196 | DATA_TYPE val,
|
|---|
| 197 | target_ulong tlb_addr,
|
|---|
| 198 | void *retaddr)
|
|---|
| 199 | {
|
|---|
| 200 | int index;
|
|---|
| 201 |
|
|---|
| 202 | index = (tlb_addr >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
|
|---|
| 203 | env->mem_write_vaddr = tlb_addr;
|
|---|
| 204 | env->mem_write_pc = (unsigned long)retaddr;
|
|---|
| 205 | #if SHIFT <= 2
|
|---|
| 206 | io_mem_write[index][SHIFT](io_mem_opaque[index], physaddr, val);
|
|---|
| 207 | #else
|
|---|
| 208 | #ifdef TARGET_WORDS_BIGENDIAN
|
|---|
| 209 | io_mem_write[index][2](io_mem_opaque[index], physaddr, val >> 32);
|
|---|
| 210 | io_mem_write[index][2](io_mem_opaque[index], physaddr + 4, val);
|
|---|
| 211 | #else
|
|---|
| 212 | io_mem_write[index][2](io_mem_opaque[index], physaddr, val);
|
|---|
| 213 | io_mem_write[index][2](io_mem_opaque[index], physaddr + 4, val >> 32);
|
|---|
| 214 | #endif
|
|---|
| 215 | #endif /* SHIFT > 2 */
|
|---|
| 216 | #ifdef USE_KQEMU
|
|---|
| 217 | env->last_io_time = cpu_get_time_fast();
|
|---|
| 218 | #endif
|
|---|
| 219 | }
|
|---|
| 220 |
|
|---|
| 221 | void REGPARM(2) glue(glue(__st, SUFFIX), MMUSUFFIX)(target_ulong addr,
|
|---|
| 222 | DATA_TYPE val,
|
|---|
| 223 | int is_user)
|
|---|
| 224 | {
|
|---|
| 225 | target_phys_addr_t physaddr;
|
|---|
| 226 | target_ulong tlb_addr;
|
|---|
| 227 | void *retaddr;
|
|---|
| 228 | int index;
|
|---|
| 229 |
|
|---|
| 230 | index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
|
|---|
| 231 | redo:
|
|---|
| 232 | tlb_addr = env->tlb_table[is_user][index].addr_write;
|
|---|
| 233 | if ((addr & TARGET_PAGE_MASK) == (tlb_addr & (TARGET_PAGE_MASK | TLB_INVALID_MASK))) {
|
|---|
| 234 | physaddr = addr + env->tlb_table[is_user][index].addend;
|
|---|
| 235 | if (tlb_addr & ~TARGET_PAGE_MASK) {
|
|---|
| 236 | /* IO access */
|
|---|
| 237 | if ((addr & (DATA_SIZE - 1)) != 0)
|
|---|
| 238 | goto do_unaligned_access;
|
|---|
| 239 | retaddr = GETPC();
|
|---|
| 240 | glue(io_write, SUFFIX)(physaddr, val, tlb_addr, retaddr);
|
|---|
| 241 | } else if (((addr & ~TARGET_PAGE_MASK) + DATA_SIZE - 1) >= TARGET_PAGE_SIZE) {
|
|---|
| 242 | do_unaligned_access:
|
|---|
| 243 | retaddr = GETPC();
|
|---|
| 244 | #ifdef ALIGNED_ONLY
|
|---|
| 245 | do_unaligned_access(addr, 1, is_user, retaddr);
|
|---|
| 246 | #endif
|
|---|
| 247 | glue(glue(slow_st, SUFFIX), MMUSUFFIX)(addr, val,
|
|---|
| 248 | is_user, retaddr);
|
|---|
| 249 | } else {
|
|---|
| 250 | /* aligned/unaligned access in the same page */
|
|---|
| 251 | #ifdef ALIGNED_ONLY
|
|---|
| 252 | if ((addr & (DATA_SIZE - 1)) != 0) {
|
|---|
| 253 | retaddr = GETPC();
|
|---|
| 254 | do_unaligned_access(addr, 1, is_user, retaddr);
|
|---|
| 255 | }
|
|---|
| 256 | #endif
|
|---|
| 257 | glue(glue(st, SUFFIX), _raw)((uint8_t *)(long)physaddr, val);
|
|---|
| 258 | }
|
|---|
| 259 | } else {
|
|---|
| 260 | /* the page is not in the TLB : fill it */
|
|---|
| 261 | retaddr = GETPC();
|
|---|
| 262 | #ifdef ALIGNED_ONLY
|
|---|
| 263 | if ((addr & (DATA_SIZE - 1)) != 0)
|
|---|
| 264 | do_unaligned_access(addr, 1, is_user, retaddr);
|
|---|
| 265 | #endif
|
|---|
| 266 | tlb_fill(addr, 1, is_user, retaddr);
|
|---|
| 267 | goto redo;
|
|---|
| 268 | }
|
|---|
| 269 | }
|
|---|
| 270 |
|
|---|
| 271 | /* handles all unaligned cases */
|
|---|
| 272 | static void glue(glue(slow_st, SUFFIX), MMUSUFFIX)(target_ulong addr,
|
|---|
| 273 | DATA_TYPE val,
|
|---|
| 274 | int is_user,
|
|---|
| 275 | void *retaddr)
|
|---|
| 276 | {
|
|---|
| 277 | target_phys_addr_t physaddr;
|
|---|
| 278 | target_ulong tlb_addr;
|
|---|
| 279 | int index, i;
|
|---|
| 280 |
|
|---|
| 281 | index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
|
|---|
| 282 | redo:
|
|---|
| 283 | tlb_addr = env->tlb_table[is_user][index].addr_write;
|
|---|
| 284 | if ((addr & TARGET_PAGE_MASK) == (tlb_addr & (TARGET_PAGE_MASK | TLB_INVALID_MASK))) {
|
|---|
| 285 | physaddr = addr + env->tlb_table[is_user][index].addend;
|
|---|
| 286 | if (tlb_addr & ~TARGET_PAGE_MASK) {
|
|---|
| 287 | /* IO access */
|
|---|
| 288 | if ((addr & (DATA_SIZE - 1)) != 0)
|
|---|
| 289 | goto do_unaligned_access;
|
|---|
| 290 | glue(io_write, SUFFIX)(physaddr, val, tlb_addr, retaddr);
|
|---|
| 291 | } else if (((addr & ~TARGET_PAGE_MASK) + DATA_SIZE - 1) >= TARGET_PAGE_SIZE) {
|
|---|
| 292 | do_unaligned_access:
|
|---|
| 293 | /* XXX: not efficient, but simple */
|
|---|
| 294 | for(i = 0;i < DATA_SIZE; i++) {
|
|---|
| 295 | #ifdef TARGET_WORDS_BIGENDIAN
|
|---|
| 296 | glue(slow_stb, MMUSUFFIX)(addr + i, val >> (((DATA_SIZE - 1) * 8) - (i * 8)),
|
|---|
| 297 | is_user, retaddr);
|
|---|
| 298 | #else
|
|---|
| 299 | glue(slow_stb, MMUSUFFIX)(addr + i, val >> (i * 8),
|
|---|
| 300 | is_user, retaddr);
|
|---|
| 301 | #endif
|
|---|
| 302 | }
|
|---|
| 303 | } else {
|
|---|
| 304 | /* aligned/unaligned access in the same page */
|
|---|
| 305 | glue(glue(st, SUFFIX), _raw)((uint8_t *)(long)physaddr, val);
|
|---|
| 306 | }
|
|---|
| 307 | } else {
|
|---|
| 308 | /* the page is not in the TLB : fill it */
|
|---|
| 309 | tlb_fill(addr, 1, is_user, retaddr);
|
|---|
| 310 | goto redo;
|
|---|
| 311 | }
|
|---|
| 312 | }
|
|---|
| 313 |
|
|---|
| 314 | #endif /* !defined(SOFTMMU_CODE_ACCESS) */
|
|---|
| 315 |
|
|---|
| 316 | #undef READ_ACCESS_TYPE
|
|---|
| 317 | #undef SHIFT
|
|---|
| 318 | #undef DATA_TYPE
|
|---|
| 319 | #undef SUFFIX
|
|---|
| 320 | #undef USUFFIX
|
|---|
| 321 | #undef DATA_SIZE
|
|---|
| 322 | #undef ADDR_READ
|
|---|
