qemu/softmmu_header.h

   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., 51 Franklin Street, Fifth Floor, Boston MA  02110-1301 USA
  19  */
  20 #if DATA_SIZE == 8
  21 #define SUFFIX q
  22 #define USUFFIX q
  23 #define DATA_TYPE uint64_t
  24 #elif DATA_SIZE == 4
  25 #define SUFFIX l
  26 #define USUFFIX l
  27 #define DATA_TYPE uint32_t
  28 #elif DATA_SIZE == 2
  29 #define SUFFIX w
  30 #define USUFFIX uw
  31 #define DATA_TYPE uint16_t
  32 #define DATA_STYPE int16_t
  33 #elif DATA_SIZE == 1
  34 #define SUFFIX b
  35 #define USUFFIX ub
  36 #define DATA_TYPE uint8_t
  37 #define DATA_STYPE int8_t
  38 #else
  39 #error unsupported data size
  40 #endif
  41
  42 #if ACCESS_TYPE < (NB_MMU_MODES)
  43
  44 #define CPU_MMU_INDEX ACCESS_TYPE
  45 #define MMUSUFFIX _mmu
  46
  47 #elif ACCESS_TYPE == (NB_MMU_MODES)
  48
  49 #define CPU_MMU_INDEX (cpu_mmu_index(env))
  50 #define MMUSUFFIX _mmu
  51
  52 #elif ACCESS_TYPE == (NB_MMU_MODES + 1)
  53
  54 #define CPU_MMU_INDEX (cpu_mmu_index(env))
  55 #define MMUSUFFIX _cmmu
  56
  57 #else
  58 #error invalid ACCESS_TYPE
  59 #endif
  60
  61 #if DATA_SIZE == 8
  62 #define RES_TYPE uint64_t
  63 #else
  64 #define RES_TYPE int
  65 #endif
  66
  67 #if ACCESS_TYPE == (NB_MMU_MODES + 1)
  68 #define ADDR_READ addr_code
  69 #else
  70 #define ADDR_READ addr_read
  71 #endif
  72
  73 #if (DATA_SIZE <= 4) && (TARGET_LONG_BITS == 32) && defined(__i386__) && \
  74     (ACCESS_TYPE < NB_MMU_MODES) && defined(ASM_SOFTMMU)
  75
  76 static inline RES_TYPE glue(glue(ld, USUFFIX), MEMSUFFIX)(target_ulong ptr)
  77 {
  78     int res;
  79
  80     asm volatile ("movl %1, %%edx\n"
  81                   "movl %1, %%eax\n"
  82                   "shrl %3, %%edx\n"
  83                   "andl %4, %%eax\n"
  84                   "andl %2, %%edx\n"
  85                   "leal %5(%%edx, %%ebp), %%edx\n"
  86                   "cmpl (%%edx), %%eax\n"
  87                   "movl %1, %%eax\n"
  88                   "je 1f\n"
  89                   "movl %6, %%edx\n"
  90                   "call %7\n"
  91                   "movl %%eax, %0\n"
  92                   "jmp 2f\n"
  93                   "1:\n"
  94                   "addl 12(%%edx), %%eax\n"
  95 #if DATA_SIZE == 1
  96                   "movzbl (%%eax), %0\n"
  97 #elif DATA_SIZE == 2
  98                   "movzwl (%%eax), %0\n"
  99 #elif DATA_SIZE == 4
 100                   "movl (%%eax), %0\n"
 101 #else
 102 #error unsupported size
 103 #endif
 104                   "2:\n"
 105                   : "=r" (res)
 106                   : "r" (ptr),
 107                   "i" ((CPU_TLB_SIZE - 1) << CPU_TLB_ENTRY_BITS),
 108                   "i" (TARGET_PAGE_BITS - CPU_TLB_ENTRY_BITS),
 109                   "i" (TARGET_PAGE_MASK | (DATA_SIZE - 1)),
 110                   "m" (*(uint32_t *)offsetof(CPUState, tlb_table[CPU_MMU_INDEX][0].addr_read)),
 111                   "i" (CPU_MMU_INDEX),
 112                   "m" (*(uint8_t *)&glue(glue(__ld, SUFFIX), MMUSUFFIX))
 113                   : "%eax", "%ecx", "%edx", "memory", "cc");
 114     return res;
 115 }
 116
 117 #if DATA_SIZE <= 2
 118 static inline int glue(glue(lds, SUFFIX), MEMSUFFIX)(target_ulong ptr)
 119 {
 120     int res;
 121
 122     asm volatile ("movl %1, %%edx\n"
 123                   "movl %1, %%eax\n"
 124                   "shrl %3, %%edx\n"
 125                   "andl %4, %%eax\n"
 126                   "andl %2, %%edx\n"
 127                   "leal %5(%%edx, %%ebp), %%edx\n"
 128                   "cmpl (%%edx), %%eax\n"
 129                   "movl %1, %%eax\n"
 130                   "je 1f\n"
 131                   "movl %6, %%edx\n"
 132                   "call %7\n"
 133 #if DATA_SIZE == 1
 134                   "movsbl %%al, %0\n"
 135 #elif DATA_SIZE == 2
 136                   "movswl %%ax, %0\n"
 137 #else
 138 #error unsupported size
 139 #endif
 140                   "jmp 2f\n"
 141                   "1:\n"
 142                   "addl 12(%%edx), %%eax\n"
 143 #if DATA_SIZE == 1
 144                   "movsbl (%%eax), %0\n"
 145 #elif DATA_SIZE == 2
 146                   "movswl (%%eax), %0\n"
 147 #else
 148 #error unsupported size
 149 #endif
 150                   "2:\n"
 151                   : "=r" (res)
 152                   : "r" (ptr),
 153                   "i" ((CPU_TLB_SIZE - 1) << CPU_TLB_ENTRY_BITS),
 154                   "i" (TARGET_PAGE_BITS - CPU_TLB_ENTRY_BITS),
 155                   "i" (TARGET_PAGE_MASK | (DATA_SIZE - 1)),
 156                   "m" (*(uint32_t *)offsetof(CPUState, tlb_table[CPU_MMU_INDEX][0].addr_read)),
 157                   "i" (CPU_MMU_INDEX),
 158                   "m" (*(uint8_t *)&glue(glue(__ld, SUFFIX), MMUSUFFIX))
 159                   : "%eax", "%ecx", "%edx", "memory", "cc");
 160     return res;
 161 }
 162 #endif
 163
 164 static inline void glue(glue(st, SUFFIX), MEMSUFFIX)(target_ulong ptr, RES_TYPE v)
 165 {
 166     asm volatile ("movl %0, %%edx\n"
 167                   "movl %0, %%eax\n"
 168                   "shrl %3, %%edx\n"
 169                   "andl %4, %%eax\n"
 170                   "andl %2, %%edx\n"
 171                   "leal %5(%%edx, %%ebp), %%edx\n"
 172                   "cmpl (%%edx), %%eax\n"
 173                   "movl %0, %%eax\n"
 174                   "je 1f\n"
 175 #if DATA_SIZE == 1
 176                   "movzbl %b1, %%edx\n"
 177 #elif DATA_SIZE == 2
 178                   "movzwl %w1, %%edx\n"
 179 #elif DATA_SIZE == 4
 180                   "movl %1, %%edx\n"
 181 #else
 182 #error unsupported size
 183 #endif
 184                   "movl %6, %%ecx\n"
 185                   "call %7\n"
 186                   "jmp 2f\n"
 187                   "1:\n"
 188                   "addl 8(%%edx), %%eax\n"
 189 #if DATA_SIZE == 1
 190                   "movb %b1, (%%eax)\n"
 191 #elif DATA_SIZE == 2
 192                   "movw %w1, (%%eax)\n"
 193 #elif DATA_SIZE == 4
 194                   "movl %1, (%%eax)\n"
 195 #else
 196 #error unsupported size
 197 #endif
 198                   "2:\n"
 199                   :
 200                   : "r" (ptr),
 201 #if DATA_SIZE == 1
 202                   "q" (v),
 203 #else
 204                   "r" (v),
 205 #endif
 206                   "i" ((CPU_TLB_SIZE - 1) << CPU_TLB_ENTRY_BITS),
 207                   "i" (TARGET_PAGE_BITS - CPU_TLB_ENTRY_BITS),
 208                   "i" (TARGET_PAGE_MASK | (DATA_SIZE - 1)),
 209                   "m" (*(uint32_t *)offsetof(CPUState, tlb_table[CPU_MMU_INDEX][0].addr_write)),
 210                   "i" (CPU_MMU_INDEX),
 211                   "m" (*(uint8_t *)&glue(glue(__st, SUFFIX), MMUSUFFIX))
 212                   : "%eax", "%ecx", "%edx", "memory", "cc");
 213 }
 214
 215 #else
 216
 217 /* generic load/store macros */
 218
 219 static inline RES_TYPE glue(glue(ld, USUFFIX), MEMSUFFIX)(target_ulong ptr)
 220 {
 221     int page_index;
 222     RES_TYPE res;
 223     target_ulong addr;
 224     unsigned long physaddr;
 225     int mmu_idx;
 226
 227     addr = ptr;
 228     page_index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
 229     mmu_idx = CPU_MMU_INDEX;
 230     if (unlikely(env->tlb_table[mmu_idx][page_index].ADDR_READ !=
 231                  (addr & (TARGET_PAGE_MASK | (DATA_SIZE - 1))))) {
 232         res = glue(glue(__ld, SUFFIX), MMUSUFFIX)(addr, mmu_idx);
 233     } else {
 234         physaddr = addr + env->tlb_table[mmu_idx][page_index].addend;
 235         res = glue(glue(ld, USUFFIX), _raw)((uint8_t *)physaddr);
 236     }
 237     return res;
 238 }
 239
 240 #if DATA_SIZE <= 2
 241 static inline int glue(glue(lds, SUFFIX), MEMSUFFIX)(target_ulong ptr)
 242 {
 243     int res, page_index;
 244     target_ulong addr;
 245     unsigned long physaddr;
 246     int mmu_idx;
 247
 248     addr = ptr;
 249     page_index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
 250     mmu_idx = CPU_MMU_INDEX;
 251     if (unlikely(env->tlb_table[mmu_idx][page_index].ADDR_READ !=
 252                  (addr & (TARGET_PAGE_MASK | (DATA_SIZE - 1))))) {
 253         res = (DATA_STYPE)glue(glue(__ld, SUFFIX), MMUSUFFIX)(addr, mmu_idx);
 254     } else {
 255         physaddr = addr + env->tlb_table[mmu_idx][page_index].addend;
 256         res = glue(glue(lds, SUFFIX), _raw)((uint8_t *)physaddr);
 257     }
 258     return res;
 259 }
 260 #endif
 261
 262 #if ACCESS_TYPE != (NB_MMU_MODES + 1)
 263
 264 /* generic store macro */
 265
 266 static inline void glue(glue(st, SUFFIX), MEMSUFFIX)(target_ulong ptr, RES_TYPE v)
 267 {
 268     int page_index;
 269     target_ulong addr;
 270     unsigned long physaddr;
 271     int mmu_idx;
 272
 273     addr = ptr;
 274     page_index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
 275     mmu_idx = CPU_MMU_INDEX;
 276     if (unlikely(env->tlb_table[mmu_idx][page_index].addr_write !=
 277                  (addr & (TARGET_PAGE_MASK | (DATA_SIZE - 1))))) {
 278         glue(glue(__st, SUFFIX), MMUSUFFIX)(addr, v, mmu_idx);
 279     } else {
 280         physaddr = addr + env->tlb_table[mmu_idx][page_index].addend;
 281         glue(glue(st, SUFFIX), _raw)((uint8_t *)physaddr, v);
 282     }
 283 }
 284
 285 #endif /* ACCESS_TYPE != (NB_MMU_MODES + 1) */
 286
 287 #endif /* !asm */
 288
 289 #if ACCESS_TYPE != (NB_MMU_MODES + 1)
 290
 291 #if DATA_SIZE == 8
 292 static inline float64 glue(ldfq, MEMSUFFIX)(target_ulong ptr)
 293 {
 294     union {
 295         float64 d;
 296         uint64_t i;
 297     } u;
 298     u.i = glue(ldq, MEMSUFFIX)(ptr);
 299     return u.d;
 300 }
 301
 302 static inline void glue(stfq, MEMSUFFIX)(target_ulong ptr, float64 v)
 303 {
 304     union {
 305         float64 d;
 306         uint64_t i;
 307     } u;
 308     u.d = v;
 309     glue(stq, MEMSUFFIX)(ptr, u.i);
 310 }
 311 #endif /* DATA_SIZE == 8 */
 312
 313 #if DATA_SIZE == 4
 314 static inline float32 glue(ldfl, MEMSUFFIX)(target_ulong ptr)
 315 {
 316     union {
 317         float32 f;
 318         uint32_t i;
 319     } u;
 320     u.i = glue(ldl, MEMSUFFIX)(ptr);
 321     return u.f;
 322 }
 323
 324 static inline void glue(stfl, MEMSUFFIX)(target_ulong ptr, float32 v)
 325 {
 326     union {
 327         float32 f;
 328         uint32_t i;
 329     } u;
 330     u.f = v;
 331     glue(stl, MEMSUFFIX)(ptr, u.i);
 332 }
 333 #endif /* DATA_SIZE == 4 */
 334
 335 #endif /* ACCESS_TYPE != (NB_MMU_MODES + 1) */
 336
 337 #undef RES_TYPE
 338 #undef DATA_TYPE
 339 #undef DATA_STYPE
 340 #undef SUFFIX
 341 #undef USUFFIX
 342 #undef DATA_SIZE
 343 #undef CPU_MMU_INDEX
 344 #undef MMUSUFFIX
 345 #undef ADDR_READ