mirror of https://gitee.com/openkylin/qemu.git
112 lines
3.3 KiB
C
112 lines
3.3 KiB
C
/*
|
|
* 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 DATA_TYPE uint64_t
|
|
#elif DATA_SIZE == 4
|
|
#define SUFFIX l
|
|
#define DATA_TYPE uint32_t
|
|
#elif DATA_SIZE == 2
|
|
#define SUFFIX w
|
|
#define DATA_TYPE uint16_t
|
|
#define DATA_STYPE int16_t
|
|
#elif DATA_SIZE == 1
|
|
#define SUFFIX b
|
|
#define DATA_TYPE uint8_t
|
|
#define DATA_STYPE int8_t
|
|
#else
|
|
#error unsupported data size
|
|
#endif
|
|
|
|
#if MEMUSER == 0
|
|
#define MEMSUFFIX _kernel
|
|
#else
|
|
#define MEMSUFFIX _user
|
|
#endif
|
|
|
|
#if DATA_SIZE == 8
|
|
#define RES_TYPE uint64_t
|
|
#else
|
|
#define RES_TYPE int
|
|
#endif
|
|
|
|
|
|
#if MEMUSER == 0
|
|
DATA_TYPE __attribute((regparm(1))) glue(glue(__ld, SUFFIX), _mmu)(unsigned long addr);
|
|
void __attribute((regparm(2))) glue(glue(__st, SUFFIX), _mmu)(unsigned long addr, DATA_TYPE v);
|
|
#endif
|
|
|
|
static inline int glue(glue(ldu, SUFFIX), MEMSUFFIX)(void *ptr)
|
|
{
|
|
int index;
|
|
RES_TYPE res;
|
|
unsigned long addr, physaddr;
|
|
addr = (unsigned long)ptr;
|
|
index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
|
|
if (__builtin_expect(env->tlb_read[MEMUSER][index].address !=
|
|
(addr & (TARGET_PAGE_MASK | (DATA_SIZE - 1))), 0)) {
|
|
res = glue(glue(__ld, SUFFIX), _mmu)(addr);
|
|
} else {
|
|
physaddr = addr + env->tlb_read[MEMUSER][index].addend;
|
|
res = glue(glue(ldu, SUFFIX), _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;
|
|
addr = (unsigned long)ptr;
|
|
index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
|
|
if (__builtin_expect(env->tlb_read[MEMUSER][index].address !=
|
|
(addr & (TARGET_PAGE_MASK | (DATA_SIZE - 1))), 0)) {
|
|
res = (DATA_STYPE)glue(glue(__ld, SUFFIX), _mmu)(addr);
|
|
} else {
|
|
physaddr = addr + env->tlb_read[MEMUSER][index].addend;
|
|
res = glue(glue(lds, SUFFIX), _raw)((uint8_t *)physaddr);
|
|
}
|
|
return res;
|
|
}
|
|
#endif
|
|
|
|
static inline void glue(glue(st, SUFFIX), MEMSUFFIX)(void *ptr, RES_TYPE v)
|
|
{
|
|
int index;
|
|
unsigned long addr, physaddr;
|
|
addr = (unsigned long)ptr;
|
|
index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
|
|
if (__builtin_expect(env->tlb_write[MEMUSER][index].address !=
|
|
(addr & (TARGET_PAGE_MASK | (DATA_SIZE - 1))), 0)) {
|
|
glue(glue(__st, SUFFIX), _mmu)(addr, v);
|
|
} else {
|
|
physaddr = addr + env->tlb_write[MEMUSER][index].addend;
|
|
glue(glue(st, SUFFIX), _raw)((uint8_t *)physaddr, v);
|
|
}
|
|
}
|
|
|
|
#undef RES_TYPE
|
|
#undef DATA_TYPE
|
|
#undef DATA_STYPE
|
|
#undef SUFFIX
|
|
#undef DATA_SIZE
|
|
#undef MEMSUFFIX
|