/* * 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 */ #define DATA_SIZE (1 << SHIFT) #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 #elif DATA_SIZE == 1 #define SUFFIX b #define USUFFIX ub #define DATA_TYPE uint8_t #else #error unsupported data size #endif #ifdef SOFTMMU_CODE_ACCESS #define READ_ACCESS_TYPE 2 #define ADDR_READ addr_code #else #define READ_ACCESS_TYPE 0 #define ADDR_READ addr_read #endif static DATA_TYPE glue(glue(slow_ld, SUFFIX), MMUSUFFIX)(target_ulong addr, int is_user, void *retaddr); static inline DATA_TYPE glue(io_read, SUFFIX)(target_phys_addr_t physaddr, target_ulong tlb_addr) { DATA_TYPE res; int index; index = (tlb_addr >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1); #if SHIFT <= 2 res = io_mem_read[index][SHIFT](io_mem_opaque[index], physaddr); #else #ifdef TARGET_WORDS_BIGENDIAN res = (uint64_t)io_mem_read[index][2](io_mem_opaque[index], physaddr) << 32; res |= io_mem_read[index][2](io_mem_opaque[index], physaddr + 4); #else res = io_mem_read[index][2](io_mem_opaque[index], physaddr); res |= (uint64_t)io_mem_read[index][2](io_mem_opaque[index], physaddr + 4) << 32; #endif #endif /* SHIFT > 2 */ #ifdef USE_KQEMU env->last_io_time = cpu_get_time_fast(); #endif return res; } /* handle all cases except unaligned access which span two pages */ DATA_TYPE REGPARM(1) glue(glue(__ld, SUFFIX), MMUSUFFIX)(target_ulong addr, int is_user) { DATA_TYPE res; int index; target_ulong tlb_addr; target_phys_addr_t physaddr; void *retaddr; /* test if there is match for unaligned or IO access */ /* XXX: could done more in memory macro in a non portable way */ index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1); redo: tlb_addr = env->tlb_table[is_user][index].ADDR_READ; if ((addr & TARGET_PAGE_MASK) == (tlb_addr & (TARGET_PAGE_MASK | TLB_INVALID_MASK))) { physaddr = addr + env->tlb_table[is_user][index].addend; if (tlb_addr & ~TARGET_PAGE_MASK) { /* IO access */ if ((addr & (DATA_SIZE - 1)) != 0) goto do_unaligned_access; res = glue(io_read, SUFFIX)(physaddr, tlb_addr); } else if (((addr & ~TARGET_PAGE_MASK) + DATA_SIZE - 1) >= TARGET_PAGE_SIZE) { /* slow unaligned access (it spans two pages or IO) */ do_unaligned_access: retaddr = GETPC(); #ifdef ALIGNED_ONLY do_unaligned_acc

#! /bin/sh

. ../../testenv.sh

GHDL_STD_FLAGS=--std=08
for t in min01 max01; do
    synth_tb $t
done

echo "Test successful"

_fill(addr, 1, is_user, retaddr); goto redo; } } /* handles all unaligned cases */ static void glue(glue(slow_st, SUFFIX), MMUSUFFIX)(target_ulong addr, DATA_TYPE val, int is_user, void *retaddr) { target_phys_addr_t physaddr; target_ulong tlb_addr; int index, i; index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1); redo: tlb_addr = env->tlb_table[is_user][index].addr_write; if ((addr & TARGET_PAGE_MASK) == (tlb_addr & (TARGET_PAGE_MASK | TLB_INVALID_MASK))) { physaddr = addr + env->tlb_table[is_user][index].addend; if (tlb_addr & ~TARGET_PAGE_MASK) { /* IO access */ if ((addr & (DATA_SIZE - 1)) != 0) goto do_unaligned_access; glue(io_write, SUFFIX)(physaddr, val, tlb_addr, retaddr); } else if (((addr & ~TARGET_PAGE_MASK) + DATA_SIZE - 1) >= TARGET_PAGE_SIZE) { do_unaligned_access: /* XXX: not efficient, but simple */ for(i = 0;i < DATA_SIZE; i++) { #ifdef TARGET_WORDS_BIGENDIAN glue(slow_stb, MMUSUFFIX)(addr + i, val >> (((DATA_SIZE - 1) * 8) - (i * 8)), is_user, retaddr); #else glue(slow_stb, MMUSUFFIX)(addr + i, val >> (i * 8), is_user, retaddr); #endif } } else { /* aligned/unaligned access in the same page */ glue(glue(st, SUFFIX), _raw)((uint8_t *)(long)physaddr, val); } } else { /* the page is not in the TLB : fill it */ tlb_fill(addr, 1, is_user, retaddr); goto redo; } } #endif /* !defined(SOFTMMU_CODE_ACCESS) */ #undef READ_ACCESS_TYPE #undef SHIFT #undef DATA_TYPE #undef SUFFIX #undef USUFFIX #undef DATA_SIZE #undef ADDR_READ