softmmu_header.h

   1 /*
   2  *  Software MMU support
   3  *
   4  * Generate inline load/store functions for one MMU mode and data
   5  * size.
   6  *
   7  * Generate a store function as well as signed and unsigned loads. For
   8  * 32 and 64 bit cases, also generate floating point functions with
   9  * the same size.
  10  *
  11  * Not used directly but included from softmmu_exec.h and exec-all.h.
  12  *
  13  *  Copyright (c) 2003 Fabrice Bellard
  14  *
  15  * This library is free software; you can redistribute it and/or
  16  * modify it under the terms of the GNU Lesser General Public
  17  * License as published by the Free Software Foundation; either
  18  * version 2 of the License, or (at your option) any later version.
  19  *
  20  * This library is distributed in the hope that it will be useful,
  21  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  22  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  23  * Lesser General Public License for more details.
  24  *
  25  * You should have received a copy of the GNU Lesser General Public
  26  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  27  */
  28 #if DATA_SIZE == 8
  29 #define SUFFIX q
  30 #define USUFFIX q
  31 #define DATA_TYPE uint64_t
  32 #elif DATA_SIZE == 4
  33 #define SUFFIX l
  34 #define USUFFIX l
  35 #define DATA_TYPE uint32_t
  36 #elif DATA_SIZE == 2
  37 #define SUFFIX w
  38 #define USUFFIX uw
  39 #define DATA_TYPE uint16_t
  40 #define DATA_STYPE int16_t
  41 #elif DATA_SIZE == 1
  42 #define SUFFIX b
  43 #define USUFFIX ub
  44 #define DATA_TYPE uint8_t
  45 #define DATA_STYPE int8_t
  46 #else
  47 #error unsupported data size
  48 #endif
  49
  50 #if ACCESS_TYPE < (NB_MMU_MODES)
  51
  52 #define CPU_MMU_INDEX ACCESS_TYPE
  53 #define MMUSUFFIX _mmu
  54
  55 #elif ACCESS_TYPE == (NB_MMU_MODES)
  56
  57 #define CPU_MMU_INDEX (cpu_mmu_index(env))
  58 #define MMUSUFFIX _mmu
  59
  60 #elif ACCESS_TYPE == (NB_MMU_MODES + 1)
  61
  62 #define CPU_MMU_INDEX (cpu_mmu_index(env))
  63 #define MMUSUFFIX _cmmu
  64
  65 #else
  66 #error invalid ACCESS_TYPE
  67 #endif
  68
  69 #if DATA_SIZE == 8
  70 #define RES_TYPE uint64_t
  71 #else
  72 #define RES_TYPE uint32_t
  73 #endif
  74
  75 #if ACCESS_TYPE == (NB_MMU_MODES + 1)
  76 #define ADDR_READ addr_code
  77 #else
  78 #define ADDR_READ addr_read
  79 #endif
  80
  81 /* generic load/store macros */
  82
  83 static inline RES_TYPE glue(glue(ld, USUFFIX), MEMSUFFIX)(target_ulong ptr)
  84 {
  85     int page_index;
  86     RES_TYPE res;
  87     target_ulong addr;
  88     unsigned long physaddr;
  89     int mmu_idx;
  90
  91     addr = ptr;
  92     page_index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
  93     mmu_idx = CPU_MMU_INDEX;
  94     if (unlikely(env->tlb_table[mmu_idx][page_index].ADDR_READ !=
  95                  (addr & (TARGET_PAGE_MASK | (DATA_SIZE - 1))))) {
  96         res = glue(glue(__ld, SUFFIX), MMUSUFFIX)(addr, mmu_idx);
  97     } else {
  98         physaddr = addr + env->tlb_table[mmu_idx][page_index].addend;
  99         res = glue(glue(ld, USUFFIX), _raw)((uint8_t *)physaddr);
 100     }
 101     return res;
 102 }
 103
 104 #if DATA_SIZE <= 2
 105 static inline int glue(glue(lds, SUFFIX), MEMSUFFIX)(target_ulong ptr)
 106 {
 107     int res, page_index;
 108     target_ulong addr;
 109     unsigned long physaddr;
 110     int mmu_idx;
 111
 112     addr = ptr;
 113     page_index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
 114     mmu_idx = CPU_MMU_INDEX;
 115     if (unlikely(env->tlb_table[mmu_idx][page_index].ADDR_READ !=
 116                  (addr & (TARGET_PAGE_MASK | (DATA_SIZE - 1))))) {
 117         res = (DATA_STYPE)glue(glue(__ld, SUFFIX), MMUSUFFIX)(addr, mmu_idx);
 118     } else {
 119         physaddr = addr + env->tlb_table[mmu_idx][page_index].addend;
 120         res = glue(glue(lds, SUFFIX), _raw)((uint8_t *)physaddr);
 121     }
 122     return res;
 123 }
 124 #endif
 125
 126 #if ACCESS_TYPE != (NB_MMU_MODES + 1)
 127
 128 /* generic store macro */
 129
 130 static inline void glue(glue(st, SUFFIX), MEMSUFFIX)(target_ulong ptr, RES_TYPE v)
 131 {
 132     int page_index;
 133     target_ulong addr;
 134     unsigned long physaddr;
 135     int mmu_idx;
 136
 137     addr = ptr;
 138     page_index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
 139     mmu_idx = CPU_MMU_INDEX;
 140     if (unlikely(env->tlb_table[mmu_idx][page_index].addr_write !=
 141                  (addr & (TARGET_PAGE_MASK | (DATA_SIZE - 1))))) {
 142         glue(glue(__st, SUFFIX), MMUSUFFIX)(addr, v, mmu_idx);
 143     } else {
 144         physaddr = addr + env->tlb_table[mmu_idx][page_index].addend;
 145         glue(glue(st, SUFFIX), _raw)((uint8_t *)physaddr, v);
 146     }
 147 }
 148
 149 #endif /* ACCESS_TYPE != (NB_MMU_MODES + 1) */
 150
 151 #if ACCESS_TYPE != (NB_MMU_MODES + 1)
 152
 153 #if DATA_SIZE == 8
 154 static inline float64 glue(ldfq, MEMSUFFIX)(target_ulong ptr)
 155 {
 156     union {
 157         float64 d;
 158         uint64_t i;
 159     } u;
 160     u.i = glue(ldq, MEMSUFFIX)(ptr);
 161     return u.d;
 162 }
 163
 164 static inline void glue(stfq, MEMSUFFIX)(target_ulong ptr, float64 v)
 165 {
 166     union {
 167         float64 d;
 168         uint64_t i;
 169     } u;
 170     u.d = v;
 171     glue(stq, MEMSUFFIX)(ptr, u.i);
 172 }
 173 #endif /* DATA_SIZE == 8 */
 174
 175 #if DATA_SIZE == 4
 176 static inline float32 glue(ldfl, MEMSUFFIX)(target_ulong ptr)
 177 {
 178     union {
 179         float32 f;
 180         uint32_t i;
 181     } u;
 182     u.i = glue(ldl, MEMSUFFIX)(ptr);
 183     return u.f;
 184 }
 185
 186 static inline void glue(stfl, MEMSUFFIX)(target_ulong ptr, float32 v)
 187 {
 188     union {
 189         float32 f;
 190         uint32_t i;
 191     } u;
 192     u.f = v;
 193     glue(stl, MEMSUFFIX)(ptr, u.i);
 194 }
 195 #endif /* DATA_SIZE == 4 */
 196
 197 #endif /* ACCESS_TYPE != (NB_MMU_MODES + 1) */
 198
 199 #undef RES_TYPE
 200 #undef DATA_TYPE
 201 #undef DATA_STYPE
 202 #undef SUFFIX
 203 #undef USUFFIX
 204 #undef DATA_SIZE
 205 #undef CPU_MMU_INDEX
 206 #undef MMUSUFFIX
 207 #undef ADDR_READ