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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  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 == 0
  43
  44 #define CPU_MEM_INDEX 0
  45 #define MMUSUFFIX _mmu
  46
  47 #elif ACCESS_TYPE == 1
  48
  49 #define CPU_MEM_INDEX 1
  50 #define MMUSUFFIX _mmu
  51
  52 #elif ACCESS_TYPE == 2
  53
  54 #ifdef TARGET_I386
  55 #define CPU_MEM_INDEX ((env->hflags & HF_CPL_MASK) == 3)
  56 #elif defined (TARGET_PPC)
  57 #define CPU_MEM_INDEX (msr_pr)
  58 #elif defined (TARGET_SPARC)
  59 #define CPU_MEM_INDEX ((env->psrs) == 0)
  60 #endif
  61 #define MMUSUFFIX _mmu
  62
  63 #elif ACCESS_TYPE == 3
  64
  65 #ifdef TARGET_I386
  66 #define CPU_MEM_INDEX ((env->hflags & HF_CPL_MASK) == 3)
  67 #elif defined (TARGET_PPC)
  68 #define CPU_MEM_INDEX (msr_pr)
  69 #elif defined (TARGET_SPARC)
  70 #define CPU_MEM_INDEX ((env->psrs) == 0)
  71 #endif
  72 #define MMUSUFFIX _cmmu
  73
  74 #else
  75 #error invalid ACCESS_TYPE
  76 #endif
  77
  78 #if DATA_SIZE == 8
  79 #define RES_TYPE uint64_t
  80 #else
  81 #define RES_TYPE int
  82 #endif
  83
  84
  85 DATA_TYPE REGPARM(1) glue(glue(__ld, SUFFIX), MMUSUFFIX)(unsigned long addr,
  86                                                          int is_user);
  87 void REGPARM(2) glue(glue(__st, SUFFIX), MMUSUFFIX)(unsigned long addr, DATA_TYPE v, int is_user);
  88
  89 #if (DATA_SIZE <= 4) && defined(__i386__) && (ACCESS_TYPE <= 1) && defined(ASM_SOFTMMU)
  90
  91 static inline RES_TYPE glue(glue(ld, USUFFIX), MEMSUFFIX)(void *ptr)
  92 {
  93     int res;
  94
  95     asm volatile ("movl %1, %%edx\n"
  96                   "movl %1, %%eax\n"
  97                   "shrl %3, %%edx\n"
  98                   "andl %4, %%eax\n"
  99                   "andl %2, %%edx\n"
 100                   "leal %5(%%edx, %%ebp), %%edx\n"
 101                   "cmpl (%%edx), %%eax\n"
 102                   "movl %1, %%eax\n"
 103                   "je 1f\n"
 104                   "pushl %6\n"
 105                   "call %7\n"
 106                   "popl %%edx\n"
 107                   "movl %%eax, %0\n"
 108                   "jmp 2f\n"
 109                   "1:\n"
 110                   "addl 4(%%edx), %%eax\n"
 111 #if DATA_SIZE == 1
 112                   "movzbl (%%eax), %0\n"
 113 #elif DATA_SIZE == 2
 114                   "movzwl (%%eax), %0\n"
 115 #elif DATA_SIZE == 4
 116                   "movl (%%eax), %0\n"
 117 #else
 118 #error unsupported size
 119 #endif
 120                   "2:\n"
 121                   : "=r" (res)
 122                   : "r" (ptr),
 123                   "i" ((CPU_TLB_SIZE - 1) << 3),
 124                   "i" (TARGET_PAGE_BITS - 3),
 125                   "i" (TARGET_PAGE_MASK | (DATA_SIZE - 1)),
 126                   "m" (*(uint32_t *)offsetof(CPUState, tlb_read[CPU_MEM_INDEX][0].address)),
 127                   "i" (CPU_MEM_INDEX),
 128                   "m" (*(uint8_t *)&glue(glue(__ld, SUFFIX), MMUSUFFIX))
 129                   : "%eax", "%ecx", "%edx", "memory", "cc");
 130     return res;
 131 }
 132
 133 #if DATA_SIZE <= 2
 134 static inline int glue(glue(lds, SUFFIX), MEMSUFFIX)(void *ptr)
 135 {
 136     int res;
 137
 138     asm volatile ("movl %1, %%edx\n"
 139                   "movl %1, %%eax\n"
 140                   "shrl %3, %%edx\n"
 141                   "andl %4, %%eax\n"
 142                   "andl %2, %%edx\n"
 143                   "leal %5(%%edx, %%ebp), %%edx\n"
 144                   "cmpl (%%edx), %%eax\n"
 145                   "movl %1, %%eax\n"
 146                   "je 1f\n"
 147                   "pushl %6\n"
 148                   "call %7\n"
 149                   "popl %%edx\n"
 150 #if DATA_SIZE == 1
 151                   "movsbl %%al, %0\n"
 152 #elif DATA_SIZE == 2
 153                   "movswl %%ax, %0\n"
 154 #else
 155 #error unsupported size
 156 #endif
 157                   "jmp 2f\n"
 158                   "1:\n"
 159                   "addl 4(%%edx), %%eax\n"
 160 #if DATA_SIZE == 1
 161                   "movsbl (%%eax), %0\n"
 162 #elif DATA_SIZE == 2
 163                   "movswl (%%eax), %0\n"
 164 #else
 165 #error unsupported size
 166 #endif
 167                   "2:\n"
 168                   : "=r" (res)
 169                   : "r" (ptr),
 170                   "i" ((CPU_TLB_SIZE - 1) << 3),
 171                   "i" (TARGET_PAGE_BITS - 3),
 172                   "i" (TARGET_PAGE_MASK | (DATA_SIZE - 1)),
 173                   "m" (*(uint32_t *)offsetof(CPUState, tlb_read[CPU_MEM_INDEX][0].address)),
 174                   "i" (CPU_MEM_INDEX),
 175                   "m" (*(uint8_t *)&glue(glue(__ld, SUFFIX), MMUSUFFIX))
 176                   : "%eax", "%ecx", "%edx", "memory", "cc");
 177     return res;
 178 }
 179 #endif
 180
 181 static inline void glue(glue(st, SUFFIX), MEMSUFFIX)(void *ptr, RES_TYPE v)
 182 {
 183     asm volatile ("movl %0, %%edx\n"
 184                   "movl %0, %%eax\n"
 185                   "shrl %3, %%edx\n"
 186                   "andl %4, %%eax\n"
 187                   "andl %2, %%edx\n"
 188                   "leal %5(%%edx, %%ebp), %%edx\n"
 189                   "cmpl (%%edx), %%eax\n"
 190                   "movl %0, %%eax\n"
 191                   "je 1f\n"
 192 #if DATA_SIZE == 1
 193                   "movzbl %b1, %%edx\n"
 194 #elif DATA_SIZE == 2
 195                   "movzwl %w1, %%edx\n"
 196 #elif DATA_SIZE == 4
 197                   "movl %1, %%edx\n"
 198 #else
 199 #error unsupported size
 200 #endif
 201                   "pushl %6\n"
 202                   "call %7\n"
 203                   "popl %%eax\n"
 204                   "jmp 2f\n"
 205                   "1:\n"
 206                   "addl 4(%%edx), %%eax\n"
 207 #if DATA_SIZE == 1
 208                   "movb %b1, (%%eax)\n"
 209 #elif DATA_SIZE == 2
 210                   "movw %w1, (%%eax)\n"
 211 #elif DATA_SIZE == 4
 212                   "movl %1, (%%eax)\n"
 213 #else
 214 #error unsupported size
 215 #endif
 216                   "2:\n"
 217                   :
 218                   : "r" (ptr),
 219 /* NOTE: 'q' would be needed as constraint, but we could not use it
 220    with T1 ! */
 221                   "r" (v),
 222                   "i" ((CPU_TLB_SIZE - 1) << 3),
 223                   "i" (TARGET_PAGE_BITS - 3),
 224                   "i" (TARGET_PAGE_MASK | (DATA_SIZE - 1)),
 225                   "m" (*(uint32_t *)offsetof(CPUState, tlb_write[CPU_MEM_INDEX][0].address)),
 226                   "i" (CPU_MEM_INDEX),
 227                   "m" (*(uint8_t *)&glue(glue(__st, SUFFIX), MMUSUFFIX))
 228                   : "%eax", "%ecx", "%edx", "memory", "cc");
 229 }
 230
 231 #else
 232
 233 /* generic load/store macros */
 234
 235 static inline RES_TYPE glue(glue(ld, USUFFIX), MEMSUFFIX)(void *ptr)
 236 {
 237     int index;
 238     RES_TYPE res;
 239     unsigned long addr, physaddr;
 240     int is_user;
 241
 242     addr = (unsigned long)ptr;
 243     index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
 244     is_user = CPU_MEM_INDEX;
 245     if (__builtin_expect(env->tlb_read[is_user][index].address !=
 246                          (addr & (TARGET_PAGE_MASK | (DATA_SIZE - 1))), 0)) {
 247         res = glue(glue(__ld, SUFFIX), MMUSUFFIX)(addr, is_user);
 248     } else {
 249         physaddr = addr + env->tlb_read[is_user][index].addend;
 250         res = glue(glue(ld, USUFFIX), _raw)((uint8_t *)physaddr);
 251     }
 252     return res;
 253 }
 254
 255 #if DATA_SIZE <= 2
 256 static inline int glue(glue(lds, SUFFIX), MEMSUFFIX)(void *ptr)
 257 {
 258     int res, index;
 259     unsigned long addr, physaddr;
 260     int is_user;
 261
 262     addr = (unsigned long)ptr;
 263     index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
 264     is_user = CPU_MEM_INDEX;
 265     if (__builtin_expect(env->tlb_read[is_user][index].address !=
 266                          (addr & (TARGET_PAGE_MASK | (DATA_SIZE - 1))), 0)) {
 267         res = (DATA_STYPE)glue(glue(__ld, SUFFIX), MMUSUFFIX)(addr, is_user);
 268     } else {
 269         physaddr = addr + env->tlb_read[is_user][index].addend;
 270         res = glue(glue(lds, SUFFIX), _raw)((uint8_t *)physaddr);
 271     }
 272     return res;
 273 }
 274 #endif
 275
 276 /* generic store macro */
 277
 278 static inline void glue(glue(st, SUFFIX), MEMSUFFIX)(void *ptr, RES_TYPE v)
 279 {
 280     int index;
 281     unsigned long addr, physaddr;
 282     int is_user;
 283
 284     addr = (unsigned long)ptr;
 285     index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
 286     is_user = CPU_MEM_INDEX;
 287     if (__builtin_expect(env->tlb_write[is_user][index].address !=
 288                          (addr & (TARGET_PAGE_MASK | (DATA_SIZE - 1))), 0)) {
 289         glue(glue(__st, SUFFIX), MMUSUFFIX)(addr, v, is_user);
 290     } else {
 291         physaddr = addr + env->tlb_write[is_user][index].addend;
 292         glue(glue(st, SUFFIX), _raw)((uint8_t *)physaddr, v);
 293     }
 294 }
 295
 296 #endif
 297
 298 #if DATA_SIZE == 8
 299 static inline double glue(ldfq, MEMSUFFIX)(void *ptr)
 300 {
 301     union {
 302         double d;
 303         uint64_t i;
 304     } u;
 305     u.i = glue(ldq, MEMSUFFIX)(ptr);
 306     return u.d;
 307 }
 308
 309 static inline void glue(stfq, MEMSUFFIX)(void *ptr, double v)
 310 {
 311     union {
 312         double d;
 313         uint64_t i;
 314     } u;
 315     u.d = v;
 316     glue(stq, MEMSUFFIX)(ptr, u.i);
 317 }
 318 #endif /* DATA_SIZE == 8 */
 319
 320 #if DATA_SIZE == 4
 321 static inline float glue(ldfl, MEMSUFFIX)(void *ptr)
 322 {
 323     union {
 324         float f;
 325         uint32_t i;
 326     } u;
 327     u.i = glue(ldl, MEMSUFFIX)(ptr);
 328     return u.f;
 329 }
 330
 331 static inline void glue(stfl, MEMSUFFIX)(void *ptr, float v)
 332 {
 333     union {
 334         float f;
 335         uint32_t i;
 336     } u;
 337     u.f = v;
 338     glue(stl, MEMSUFFIX)(ptr, u.i);
 339 }
 340 #endif /* DATA_SIZE == 4 */
 341
 342 #undef RES_TYPE
 343 #undef DATA_TYPE
 344 #undef DATA_STYPE
 345 #undef SUFFIX
 346 #undef USUFFIX
 347 #undef DATA_SIZE
 348 #undef CPU_MEM_INDEX
 349 #undef MMUSUFFIX