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 #define SHIFT 3
  31 #elif DATA_SIZE == 4
  32 #define SUFFIX l
  33 #define USUFFIX l
  34 #define DATA_TYPE uint32_t
  35 #define SHIFT 2
  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 #define SHIFT 1
  42 #elif DATA_SIZE == 1
  43 #define SUFFIX b
  44 #define USUFFIX ub
  45 #define DATA_TYPE uint8_t
  46 #define DATA_STYPE int8_t
  47 #define SHIFT 0
  48 #else
  49 #error unsupported data size
  50 #endif
  51
  52 #if DATA_SIZE == 8
  53 #define RES_TYPE uint64_t
  54 #else
  55 #define RES_TYPE uint32_t
  56 #endif
  57
  58 #ifdef SOFTMMU_CODE_ACCESS
  59 #define ADDR_READ addr_code
  60 #define MMUSUFFIX _cmmu
  61 #define URETSUFFIX SUFFIX
  62 #define SRETSUFFIX SUFFIX
  63 #else
  64 #define ADDR_READ addr_read
  65 #define MMUSUFFIX _mmu
  66 #define URETSUFFIX USUFFIX
  67 #define SRETSUFFIX glue(s, SUFFIX)
  68 #endif
  69
  70 /* generic load/store macros */
  71
  72 static inline RES_TYPE
  73 glue(glue(glue(cpu_ld, USUFFIX), MEMSUFFIX), _ra)(CPUArchState *env,
  74                                                   target_ulong ptr,
  75                                                   uintptr_t retaddr)
  76 {
  77     int page_index;
  78     RES_TYPE res;
  79     target_ulong addr;
  80     int mmu_idx;
  81     TCGMemOpIdx oi;
  82
  83     addr = ptr;
  84     page_index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
  85     mmu_idx = CPU_MMU_INDEX;
  86     if (unlikely(env->tlb_table[mmu_idx][page_index].ADDR_READ !=
  87                  (addr & (TARGET_PAGE_MASK | (DATA_SIZE - 1))))) {
  88         oi = make_memop_idx(SHIFT, mmu_idx);
  89         res = glue(glue(helper_ret_ld, URETSUFFIX), MMUSUFFIX)(env, addr,
  90                                                             oi, retaddr);
  91     } else {
  92         uintptr_t hostaddr = addr + env->tlb_table[mmu_idx][page_index].addend;
  93         res = glue(glue(ld, USUFFIX), _p)((uint8_t *)hostaddr);
  94     }
  95     return res;
  96 }
  97
  98 static inline RES_TYPE
  99 glue(glue(cpu_ld, USUFFIX), MEMSUFFIX)(CPUArchState *env, target_ulong ptr)
 100 {
 101     return glue(glue(glue(cpu_ld, USUFFIX), MEMSUFFIX), _ra)(env, ptr, 0);
 102 }
 103
 104 #if DATA_SIZE <= 2
 105 static inline int
 106 glue(glue(glue(cpu_lds, SUFFIX), MEMSUFFIX), _ra)(CPUArchState *env,
 107                                                   target_ulong ptr,
 108                                                   uintptr_t retaddr)
 109 {
 110     int res, page_index;
 111     target_ulong addr;
 112     int mmu_idx;
 113     TCGMemOpIdx oi;
 114
 115     addr = ptr;
 116     page_index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
 117     mmu_idx = CPU_MMU_INDEX;
 118     if (unlikely(env->tlb_table[mmu_idx][page_index].ADDR_READ !=
 119                  (addr & (TARGET_PAGE_MASK | (DATA_SIZE - 1))))) {
 120         oi = make_memop_idx(SHIFT, mmu_idx);
 121         res = (DATA_STYPE)glue(glue(helper_ret_ld, SRETSUFFIX),
 122                                MMUSUFFIX)(env, addr, oi, retaddr);
 123     } else {
 124         uintptr_t hostaddr = addr + env->tlb_table[mmu_idx][page_index].addend;
 125         res = glue(glue(lds, SUFFIX), _p)((uint8_t *)hostaddr);
 126     }
 127     return res;
 128 }
 129
 130 static inline int
 131 glue(glue(cpu_lds, SUFFIX), MEMSUFFIX)(CPUArchState *env, target_ulong ptr)
 132 {
 133     return glue(glue(glue(cpu_lds, SUFFIX), MEMSUFFIX), _ra)(env, ptr, 0);
 134 }
 135 #endif
 136
 137 #ifndef SOFTMMU_CODE_ACCESS
 138
 139 /* generic store macro */
 140
 141 static inline void
 142 glue(glue(glue(cpu_st, SUFFIX), MEMSUFFIX), _ra)(CPUArchState *env,
 143                                                  target_ulong ptr,
 144                                                  RES_TYPE v, uintptr_t retaddr)
 145 {
 146     int page_index;
 147     target_ulong addr;
 148     int mmu_idx;
 149     TCGMemOpIdx oi;
 150
 151     addr = ptr;
 152     page_index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
 153     mmu_idx = CPU_MMU_INDEX;
 154     if (unlikely(env->tlb_table[mmu_idx][page_index].addr_write !=
 155                  (addr & (TARGET_PAGE_MASK | (DATA_SIZE - 1))))) {
 156         oi = make_memop_idx(SHIFT, mmu_idx);
 157         glue(glue(helper_ret_st, SUFFIX), MMUSUFFIX)(env, addr, v, oi,
 158                                                      retaddr);
 159     } else {
 160         uintptr_t hostaddr = addr + env->tlb_table[mmu_idx][page_index].addend;
 161         glue(glue(st, SUFFIX), _p)((uint8_t *)hostaddr, v);
 162     }
 163 }
 164
 165 static inline void
 166 glue(glue(cpu_st, SUFFIX), MEMSUFFIX)(CPUArchState *env, target_ulong ptr,
 167                                       RES_TYPE v)
 168 {
 169     glue(glue(glue(cpu_st, SUFFIX), MEMSUFFIX), _ra)(env, ptr, v, 0);
 170 }
 171
 172 #endif /* !SOFTMMU_CODE_ACCESS */
 173
 174 #undef RES_TYPE
 175 #undef DATA_TYPE
 176 #undef DATA_STYPE
 177 #undef SUFFIX
 178 #undef USUFFIX
 179 #undef DATA_SIZE
 180 #undef MMUSUFFIX
 181 #undef ADDR_READ
 182 #undef URETSUFFIX
 183 #undef SRETSUFFIX
 184 #undef SHIFT