include/exec/cpu_ldst_template.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 cpu_ldst.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 DATA_SIZE == 8
  51 #define RES_TYPE uint64_t
  52 #else
  53 #define RES_TYPE uint32_t
  54 #endif
  55
  56 #ifdef SOFTMMU_CODE_ACCESS
  57 #define ADDR_READ addr_code
  58 #define MMUSUFFIX _cmmu
  59 #else
  60 #define ADDR_READ addr_read
  61 #define MMUSUFFIX _mmu
  62 #endif
  63
  64 /* generic load/store macros */
  65
  66 static inline RES_TYPE
  67 glue(glue(cpu_ld, USUFFIX), MEMSUFFIX)(CPUArchState *env, target_ulong ptr)
  68 {
  69     int page_index;
  70     RES_TYPE res;
  71     target_ulong addr;
  72     int mmu_idx;
  73
  74     addr = ptr;
  75     page_index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
  76     mmu_idx = CPU_MMU_INDEX;
  77     if (unlikely(env->tlb_table[mmu_idx][page_index].ADDR_READ !=
  78                  (addr & (TARGET_PAGE_MASK | (DATA_SIZE - 1))))) {
  79         res = glue(glue(helper_ld, SUFFIX), MMUSUFFIX)(env, addr, mmu_idx);
  80     } else {
  81         uintptr_t hostaddr = addr + env->tlb_table[mmu_idx][page_index].addend;
  82         res = glue(glue(ld, USUFFIX), _raw)(hostaddr);
  83     }
  84     return res;
  85 }
  86
  87 #if DATA_SIZE <= 2
  88 static inline int
  89 glue(glue(cpu_lds, SUFFIX), MEMSUFFIX)(CPUArchState *env, target_ulong ptr)
  90 {
  91     int res, page_index;
  92     target_ulong addr;
  93     int mmu_idx;
  94
  95     addr = ptr;
  96     page_index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
  97     mmu_idx = CPU_MMU_INDEX;
  98     if (unlikely(env->tlb_table[mmu_idx][page_index].ADDR_READ !=
  99                  (addr & (TARGET_PAGE_MASK | (DATA_SIZE - 1))))) {
 100         res = (DATA_STYPE)glue(glue(helper_ld, SUFFIX),
 101                                MMUSUFFIX)(env, addr, mmu_idx);
 102     } else {
 103         uintptr_t hostaddr = addr + env->tlb_table[mmu_idx][page_index].addend;
 104         res = glue(glue(lds, SUFFIX), _raw)(hostaddr);
 105     }
 106     return res;
 107 }
 108 #endif
 109
 110 #ifndef SOFTMMU_CODE_ACCESS
 111
 112 /* generic store macro */
 113
 114 static inline void
 115 glue(glue(cpu_st, SUFFIX), MEMSUFFIX)(CPUArchState *env, target_ulong ptr,
 116                                       RES_TYPE v)
 117 {
 118     int page_index;
 119     target_ulong addr;
 120     int mmu_idx;
 121
 122     addr = ptr;
 123     page_index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
 124     mmu_idx = CPU_MMU_INDEX;
 125     if (unlikely(env->tlb_table[mmu_idx][page_index].addr_write !=
 126                  (addr & (TARGET_PAGE_MASK | (DATA_SIZE - 1))))) {
 127         glue(glue(helper_st, SUFFIX), MMUSUFFIX)(env, addr, v, mmu_idx);
 128     } else {
 129         uintptr_t hostaddr = addr + env->tlb_table[mmu_idx][page_index].addend;
 130         glue(glue(st, SUFFIX), _raw)(hostaddr, v);
 131     }
 132 }
 133
 134
 135
 136 #if DATA_SIZE == 8
 137 static inline float64 glue(cpu_ldfq, MEMSUFFIX)(CPUArchState *env,
 138                                                 target_ulong ptr)
 139 {
 140     union {
 141         float64 d;
 142         uint64_t i;
 143     } u;
 144     u.i = glue(cpu_ldq, MEMSUFFIX)(env, ptr);
 145     return u.d;
 146 }
 147
 148 static inline void glue(cpu_stfq, MEMSUFFIX)(CPUArchState *env,
 149                                              target_ulong ptr, float64 v)
 150 {
 151     union {
 152         float64 d;
 153         uint64_t i;
 154     } u;
 155     u.d = v;
 156     glue(cpu_stq, MEMSUFFIX)(env, ptr, u.i);
 157 }
 158 #endif /* DATA_SIZE == 8 */
 159
 160 #if DATA_SIZE == 4
 161 static inline float32 glue(cpu_ldfl, MEMSUFFIX)(CPUArchState *env,
 162                                                 target_ulong ptr)
 163 {
 164     union {
 165         float32 f;
 166         uint32_t i;
 167     } u;
 168     u.i = glue(cpu_ldl, MEMSUFFIX)(env, ptr);
 169     return u.f;
 170 }
 171
 172 static inline void glue(cpu_stfl, MEMSUFFIX)(CPUArchState *env,
 173                                              target_ulong ptr, float32 v)
 174 {
 175     union {
 176         float32 f;
 177         uint32_t i;
 178     } u;
 179     u.f = v;
 180     glue(cpu_stl, MEMSUFFIX)(env, ptr, u.i);
 181 }
 182 #endif /* DATA_SIZE == 4 */
 183
 184 #endif /* !SOFTMMU_CODE_ACCESS */
 185
 186 #undef RES_TYPE
 187 #undef DATA_TYPE
 188 #undef DATA_STYPE
 189 #undef SUFFIX
 190 #undef USUFFIX
 191 #undef DATA_SIZE
 192 #undef MMUSUFFIX
 193 #undef ADDR_READ