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e2222c3924
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@360 c046a42c-6fe2-441c-8c8c-71466251a162
112 lines
3.3 KiB
C
112 lines
3.3 KiB
C
/*
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* Software MMU support
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*
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* Copyright (c) 2003 Fabrice Bellard
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#if DATA_SIZE == 8
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#define SUFFIX q
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#define DATA_TYPE uint64_t
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#elif DATA_SIZE == 4
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#define SUFFIX l
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#define DATA_TYPE uint32_t
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#elif DATA_SIZE == 2
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#define SUFFIX w
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#define DATA_TYPE uint16_t
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#define DATA_STYPE int16_t
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#elif DATA_SIZE == 1
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#define SUFFIX b
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#define DATA_TYPE uint8_t
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#define DATA_STYPE int8_t
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#else
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#error unsupported data size
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#endif
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#if MEMUSER == 0
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#define MEMSUFFIX _kernel
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#else
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#define MEMSUFFIX _user
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#endif
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#if DATA_SIZE == 8
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#define RES_TYPE uint64_t
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#else
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#define RES_TYPE int
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#endif
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#if MEMUSER == 0
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DATA_TYPE REGPARM(1) glue(glue(__ld, SUFFIX), _mmu)(unsigned long addr);
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void REGPARM(2) glue(glue(__st, SUFFIX), _mmu)(unsigned long addr, DATA_TYPE v);
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#endif
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static inline int glue(glue(ldu, SUFFIX), MEMSUFFIX)(void *ptr)
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{
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int index;
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RES_TYPE res;
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unsigned long addr, physaddr;
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addr = (unsigned long)ptr;
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index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
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if (__builtin_expect(env->tlb_read[MEMUSER][index].address !=
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(addr & (TARGET_PAGE_MASK | (DATA_SIZE - 1))), 0)) {
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res = glue(glue(__ld, SUFFIX), _mmu)(addr);
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} else {
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physaddr = addr + env->tlb_read[MEMUSER][index].addend;
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res = glue(glue(ldu, SUFFIX), _raw)((uint8_t *)physaddr);
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}
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return res;
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}
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#if DATA_SIZE <= 2
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static inline int glue(glue(lds, SUFFIX), MEMSUFFIX)(void *ptr)
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{
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int res, index;
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unsigned long addr, physaddr;
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addr = (unsigned long)ptr;
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index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
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if (__builtin_expect(env->tlb_read[MEMUSER][index].address !=
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(addr & (TARGET_PAGE_MASK | (DATA_SIZE - 1))), 0)) {
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res = (DATA_STYPE)glue(glue(__ld, SUFFIX), _mmu)(addr);
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} else {
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physaddr = addr + env->tlb_read[MEMUSER][index].addend;
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res = glue(glue(lds, SUFFIX), _raw)((uint8_t *)physaddr);
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}
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return res;
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}
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#endif
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static inline void glue(glue(st, SUFFIX), MEMSUFFIX)(void *ptr, RES_TYPE v)
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{
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int index;
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unsigned long addr, physaddr;
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addr = (unsigned long)ptr;
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index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
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if (__builtin_expect(env->tlb_write[MEMUSER][index].address !=
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(addr & (TARGET_PAGE_MASK | (DATA_SIZE - 1))), 0)) {
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glue(glue(__st, SUFFIX), _mmu)(addr, v);
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} else {
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physaddr = addr + env->tlb_write[MEMUSER][index].addend;
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glue(glue(st, SUFFIX), _raw)((uint8_t *)physaddr, v);
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}
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}
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#undef RES_TYPE
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#undef DATA_TYPE
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#undef DATA_STYPE
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#undef SUFFIX
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#undef DATA_SIZE
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#undef MEMSUFFIX
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