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.
   8  *
   9  * Not used directly but included from cpu_ldst.h.
  10  *
  11  *  Copyright (c) 2003 Fabrice Bellard
  12  *
  13  * This library is free software; you can redistribute it and/or
  14  * modify it under the terms of the GNU Lesser General Public
  15  * License as published by the Free Software Foundation; either
  16  * version 2 of the License, or (at your option) any later version.
  17  *
  18  * This library is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  21  * Lesser General Public License for more details.
  22  *
  23  * You should have received a copy of the GNU Lesser General Public
  24  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  25  */
  26 #if DATA_SIZE == 8
  27 #define SUFFIX q
  28 #define USUFFIX q
  29 #define DATA_TYPE uint64_t
  30 #elif DATA_SIZE == 4
  31 #define SUFFIX l
  32 #define USUFFIX l
  33 #define DATA_TYPE uint32_t
  34 #elif DATA_SIZE == 2
  35 #define SUFFIX w
  36 #define USUFFIX uw
  37 #define DATA_TYPE uint16_t
  38 #define DATA_STYPE int16_t
  39 #elif DATA_SIZE == 1
  40 #define SUFFIX b
  41 #define USUFFIX ub
  42 #define DATA_TYPE uint8_t
  43 #define DATA_STYPE int8_t
  44 #else
  45 #error unsupported data size
  46 #endif
  47
  48 #if DATA_SIZE == 8
  49 #define RES_TYPE uint64_t
  50 #else
  51 #define RES_TYPE uint32_t
  52 #endif
  53
  54 #ifdef SOFTMMU_CODE_ACCESS
  55 #define ADDR_READ addr_code
  56 #define MMUSUFFIX _cmmu
  57 #else
  58 #define ADDR_READ addr_read
  59 #define MMUSUFFIX _mmu
  60 #endif
  61
  62 /* generic load/store macros */
  63
  64 static inline RES_TYPE
  65 glue(glue(cpu_ld, USUFFIX), MEMSUFFIX)(CPUArchState *env, target_ulong ptr)
  66 {
  67     int page_index;
  68     RES_TYPE res;
  69     target_ulong addr;
  70     int mmu_idx;
  71
  72     addr = ptr;
  73     page_index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
  74     mmu_idx = CPU_MMU_INDEX;
  75     if (unlikely(env->tlb_table[mmu_idx][page_index].ADDR_READ !=
  76                  (addr & (TARGET_PAGE_MASK | (DATA_SIZE - 1))))) {
  77         res = glue(glue(helper_ld, SUFFIX), MMUSUFFIX)(env, addr, mmu_idx);
  78     } else {
  79         uintptr_t hostaddr = addr + env->tlb_table[mmu_idx][page_index].addend;
  80         res = glue(glue(ld, USUFFIX), _p)((uint8_t *)hostaddr);
  81     }
  82     return res;
  83 }
  84
  85 #if DATA_SIZE <= 2
  86 static inline int
  87 glue(glue(cpu_lds, SUFFIX), MEMSUFFIX)(CPUArchState *env, target_ulong ptr)
  88 {
  89     int res, page_index;
  90     target_ulong addr;
  91     int mmu_idx;
  92
  93     addr = ptr;
  94     page_index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
  95     mmu_idx = CPU_MMU_INDEX;
  96     if (unlikely(env->tlb_table[mmu_idx][page_index].ADDR_READ !=
  97                  (addr & (TARGET_PAGE_MASK | (DATA_SIZE - 1))))) {
  98         res = (DATA_STYPE)glue(glue(helper_ld, SUFFIX),
  99                                MMUSUFFIX)(env, addr, mmu_idx);
 100     } else {
 101         uintptr_t hostaddr = addr + env->tlb_table[mmu_idx][page_index].addend;
 102         res = glue(glue(lds, SUFFIX), _p)((uint8_t *)hostaddr);
 103     }
 104     return res;
 105 }
 106 #endif
 107
 108 #ifndef SOFTMMU_CODE_ACCESS
 109
 110 /* generic store macro */
 111
 112 static inline void
 113 glue(glue(cpu_st, SUFFIX), MEMSUFFIX)(CPUArchState *env, target_ulong ptr,
 114                                       RES_TYPE v)
 115 {
 116     int page_index;
 117     target_ulong addr;
 118     int mmu_idx;
 119
 120     addr = ptr;
 121     page_index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
 122     mmu_idx = CPU_MMU_INDEX;
 123     if (unlikely(env->tlb_table[mmu_idx][page_index].addr_write !=
 124                  (addr & (TARGET_PAGE_MASK | (DATA_SIZE - 1))))) {
 125         glue(glue(helper_st, SUFFIX), MMUSUFFIX)(env, addr, v, mmu_idx);
 126     } else {
 127         uintptr_t hostaddr = addr + env->tlb_table[mmu_idx][page_index].addend;
 128         glue(glue(st, SUFFIX), _p)((uint8_t *)hostaddr, v);
 129     }
 130 }
 131
 132 #endif /* !SOFTMMU_CODE_ACCESS */
 133
 134 #undef RES_TYPE
 135 #undef DATA_TYPE
 136 #undef DATA_STYPE
 137 #undef SUFFIX
 138 #undef USUFFIX
 139 #undef DATA_SIZE
 140 #undef MMUSUFFIX
 141 #undef ADDR_READ