| /* |
| * Software MMU support |
| * |
| * Copyright (c) 2003 Fabrice Bellard |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with this library; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| */ |
| #if DATA_SIZE == 8 |
| #define SUFFIX q |
| #define USUFFIX q |
| #define DATA_TYPE uint64_t |
| #elif DATA_SIZE == 4 |
| #define SUFFIX l |
| #define USUFFIX l |
| #define DATA_TYPE uint32_t |
| #elif DATA_SIZE == 2 |
| #define SUFFIX w |
| #define USUFFIX uw |
| #define DATA_TYPE uint16_t |
| #define DATA_STYPE int16_t |
| #elif DATA_SIZE == 1 |
| #define SUFFIX b |
| #define USUFFIX ub |
| #define DATA_TYPE uint8_t |
| #define DATA_STYPE int8_t |
| #else |
| #error unsupported data size |
| #endif |
| |
| #if ACCESS_TYPE == 0 |
| |
| #define CPU_MEM_INDEX 0 |
| #define MMUSUFFIX _mmu |
| |
| #elif ACCESS_TYPE == 1 |
| |
| #define CPU_MEM_INDEX 1 |
| #define MMUSUFFIX _mmu |
| |
| #elif ACCESS_TYPE == 2 |
| |
| #define CPU_MEM_INDEX ((env->hflags & HF_CPL_MASK) == 3) |
| #define MMUSUFFIX _mmu |
| |
| #elif ACCESS_TYPE == 3 |
| |
| #define CPU_MEM_INDEX ((env->hflags & HF_CPL_MASK) == 3) |
| #define MMUSUFFIX _cmmu |
| |
| #else |
| #error invalid ACCESS_TYPE |
| #endif |
| |
| #if DATA_SIZE == 8 |
| #define RES_TYPE uint64_t |
| #else |
| #define RES_TYPE int |
| #endif |
| |
| |
| DATA_TYPE REGPARM(1) glue(glue(__ld, SUFFIX), MMUSUFFIX)(unsigned long addr, |
| int is_user); |
| void REGPARM(2) glue(glue(__st, SUFFIX), MMUSUFFIX)(unsigned long addr, DATA_TYPE v, int is_user); |
| |
| #if (DATA_SIZE <= 4) && defined(__i386__) && (ACCESS_TYPE <= 1) && defined(ASM_SOFTMMU) |
| |
| static inline RES_TYPE glue(glue(ld, USUFFIX), MEMSUFFIX)(void *ptr) |
| { |
| int res; |
| |
| asm volatile ("movl %1, %%edx\n" |
| "movl %1, %%eax\n" |
| "shrl %3, %%edx\n" |
| "andl %4, %%eax\n" |
| "andl %2, %%edx\n" |
| "leal %5(%%edx, %%ebp), %%edx\n" |
| "cmpl (%%edx), %%eax\n" |
| "movl %1, %%eax\n" |
| "je 1f\n" |
| "pushl %6\n" |
| "call %7\n" |
| "popl %%edx\n" |
| "movl %%eax, %0\n" |
| "jmp 2f\n" |
| "1:\n" |
| "addl 4(%%edx), %%eax\n" |
| #if DATA_SIZE == 1 |
| "movzbl (%%eax), %0\n" |
| #elif DATA_SIZE == 2 |
| "movzwl (%%eax), %0\n" |
| #elif DATA_SIZE == 4 |
| "movl (%%eax), %0\n" |
| #else |
| #error unsupported size |
| #endif |
| "2:\n" |
| : "=r" (res) |
| : "r" (ptr), |
| "i" ((CPU_TLB_SIZE - 1) << 3), |
| "i" (TARGET_PAGE_BITS - 3), |
| "i" (TARGET_PAGE_MASK | (DATA_SIZE - 1)), |
| "m" (*(uint32_t *)offsetof(CPUState, tlb_read[CPU_MEM_INDEX][0].address)), |
| "i" (CPU_MEM_INDEX), |
| "m" (*(uint8_t *)&glue(glue(__ld, SUFFIX), MMUSUFFIX)) |
| : "%eax", "%ecx", "%edx", "memory", "cc"); |
| return res; |
| } |
| |
| #if DATA_SIZE <= 2 |
| static inline int glue(glue(lds, SUFFIX), MEMSUFFIX)(void *ptr) |
| { |
| int res; |
| |
| asm volatile ("movl %1, %%edx\n" |
| "movl %1, %%eax\n" |
| "shrl %3, %%edx\n" |
| "andl %4, %%eax\n" |
| "andl %2, %%edx\n" |
| "leal %5(%%edx, %%ebp), %%edx\n" |
| "cmpl (%%edx), %%eax\n" |
| "movl %1, %%eax\n" |
| "je 1f\n" |
| "pushl %6\n" |
| "call %7\n" |
| "popl %%edx\n" |
| #if DATA_SIZE == 1 |
| "movsbl %%al, %0\n" |
| #elif DATA_SIZE == 2 |
| "movswl %%ax, %0\n" |
| #else |
| #error unsupported size |
| #endif |
| "jmp 2f\n" |
| "1:\n" |
| "addl 4(%%edx), %%eax\n" |
| #if DATA_SIZE == 1 |
| "movsbl (%%eax), %0\n" |
| #elif DATA_SIZE == 2 |
| "movswl (%%eax), %0\n" |
| #else |
| #error unsupported size |
| #endif |
| "2:\n" |
| : "=r" (res) |
| : "r" (ptr), |
| "i" ((CPU_TLB_SIZE - 1) << 3), |
| "i" (TARGET_PAGE_BITS - 3), |
| "i" (TARGET_PAGE_MASK | (DATA_SIZE - 1)), |
| "m" (*(uint32_t *)offsetof(CPUState, tlb_read[CPU_MEM_INDEX][0].address)), |
| "i" (CPU_MEM_INDEX), |
| "m" (*(uint8_t *)&glue(glue(__ld, SUFFIX), MMUSUFFIX)) |
| : "%eax", "%ecx", "%edx", "memory", "cc"); |
| return res; |
| } |
| #endif |
| |
| static inline void glue(glue(st, SUFFIX), MEMSUFFIX)(void *ptr, RES_TYPE v) |
| { |
| asm volatile ("movl %0, %%edx\n" |
| "movl %0, %%eax\n" |
| "shrl %3, %%edx\n" |
| "andl %4, %%eax\n" |
| "andl %2, %%edx\n" |
| "leal %5(%%edx, %%ebp), %%edx\n" |
| "cmpl (%%edx), %%eax\n" |
| "movl %0, %%eax\n" |
| "je 1f\n" |
| #if DATA_SIZE == 1 |
| "movzbl %b1, %%edx\n" |
| #elif DATA_SIZE == 2 |
| "movzwl %w1, %%edx\n" |
| #elif DATA_SIZE == 4 |
| "movl %1, %%edx\n" |
| #else |
| #error unsupported size |
| #endif |
| "pushl %6\n" |
| "call %7\n" |
| "popl %%eax\n" |
| "jmp 2f\n" |
| "1:\n" |
| "addl 4(%%edx), %%eax\n" |
| #if DATA_SIZE == 1 |
| "movb %b1, (%%eax)\n" |
| #elif DATA_SIZE == 2 |
| "movw %w1, (%%eax)\n" |
| #elif DATA_SIZE == 4 |
| "movl %1, (%%eax)\n" |
| #else |
| #error unsupported size |
| #endif |
| "2:\n" |
| : |
| : "r" (ptr), |
| /* NOTE: 'q' would be needed as constraint, but we could not use it |
| with T1 ! */ |
| "r" (v), |
| "i" ((CPU_TLB_SIZE - 1) << 3), |
| "i" (TARGET_PAGE_BITS - 3), |
| "i" (TARGET_PAGE_MASK | (DATA_SIZE - 1)), |
| "m" (*(uint32_t *)offsetof(CPUState, tlb_write[CPU_MEM_INDEX][0].address)), |
| "i" (CPU_MEM_INDEX), |
| "m" (*(uint8_t *)&glue(glue(__st, SUFFIX), MMUSUFFIX)) |
| : "%eax", "%ecx", "%edx", "memory", "cc"); |
| } |
| |
| #else |
| |
| /* generic load/store macros */ |
| |
| static inline RES_TYPE glue(glue(ld, USUFFIX), MEMSUFFIX)(void *ptr) |
| { |
| int index; |
| RES_TYPE res; |
| unsigned long addr, physaddr; |
| int is_user; |
| |
| addr = (unsigned long)ptr; |
| index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1); |
| is_user = CPU_MEM_INDEX; |
| if (__builtin_expect(env->tlb_read[is_user][index].address != |
| (addr & (TARGET_PAGE_MASK | (DATA_SIZE - 1))), 0)) { |
| res = glue(glue(__ld, SUFFIX), MMUSUFFIX)(addr, is_user); |
| } else { |
| physaddr = addr + env->tlb_read[is_user][index].addend; |
| res = glue(glue(ld, USUFFIX), _raw)((uint8_t *)physaddr); |
| } |
| return res; |
| } |
| |
| #if DATA_SIZE <= 2 |
| static inline int glue(glue(lds, SUFFIX), MEMSUFFIX)(void *ptr) |
| { |
| int res, index; |
| unsigned long addr, physaddr; |
| int is_user; |
| |
| addr = (unsigned long)ptr; |
| index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1); |
| is_user = CPU_MEM_INDEX; |
| if (__builtin_expect(env->tlb_read[is_user][index].address != |
| (addr & (TARGET_PAGE_MASK | (DATA_SIZE - 1))), 0)) { |
| res = (DATA_STYPE)glue(glue(__ld, SUFFIX), MMUSUFFIX)(addr, is_user); |
| } else { |
| physaddr = addr + env->tlb_read[is_user][index].addend; |
| res = glue(glue(lds, SUFFIX), _raw)((uint8_t *)physaddr); |
| } |
| return res; |
| } |
| #endif |
| |
| /* generic store macro */ |
| |
| static inline void glue(glue(st, SUFFIX), MEMSUFFIX)(void *ptr, RES_TYPE v) |
| { |
| int index; |
| unsigned long addr, physaddr; |
| int is_user; |
| |
| addr = (unsigned long)ptr; |
| index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1); |
| is_user = CPU_MEM_INDEX; |
| if (__builtin_expect(env->tlb_write[is_user][index].address != |
| (addr & (TARGET_PAGE_MASK | (DATA_SIZE - 1))), 0)) { |
| glue(glue(__st, SUFFIX), MMUSUFFIX)(addr, v, is_user); |
| } else { |
| physaddr = addr + env->tlb_write[is_user][index].addend; |
| glue(glue(st, SUFFIX), _raw)((uint8_t *)physaddr, v); |
| } |
| } |
| |
| #endif |
| |
| #undef RES_TYPE |
| #undef DATA_TYPE |
| #undef DATA_STYPE |
| #undef SUFFIX |
| #undef USUFFIX |
| #undef DATA_SIZE |
| #undef CPU_MEM_INDEX |
| #undef MMUSUFFIX |
