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physical memory access functions

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git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1249 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard 2005-01-28 22:37:22 +00:00
parent bb05683b12
commit 8df1cd076c
4 changed files with 144 additions and 57 deletions
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105
exec.c
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@ -2032,6 +2032,21 @@ void cpu_physical_memory_rw(target_phys_addr_t addr, uint8_t *buf,
addr += l;
}
}
/* never used */
uint32_t ldl_phys(target_phys_addr_t addr)
{
return 0;
}
void stl_phys_notdirty(target_phys_addr_t addr, uint32_t val)
{
}
void stl_phys(target_phys_addr_t addr, uint32_t val)
{
}
#else
void cpu_physical_memory_rw(target_phys_addr_t addr, uint8_t *buf,
int len, int is_write)
@ -2118,6 +2133,96 @@ void cpu_physical_memory_rw(target_phys_addr_t addr, uint8_t *buf,
addr += l;
}
}
/* warning: addr must be aligned */
uint32_t ldl_phys(target_phys_addr_t addr)
{
int io_index;
uint8_t *ptr;
uint32_t val;
unsigned long pd;
PhysPageDesc *p;
p = phys_page_find(addr >> TARGET_PAGE_BITS);
if (!p) {
pd = IO_MEM_UNASSIGNED;
} else {
pd = p->phys_offset;
}
if ((pd & ~TARGET_PAGE_MASK) > IO_MEM_ROM &&
(pd & ~TARGET_PAGE_MASK) != IO_MEM_CODE) {
/* I/O case */
io_index = (pd >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
val = io_mem_read[io_index][2](io_mem_opaque[io_index], addr);
} else {
/* RAM case */
ptr = phys_ram_base + (pd & TARGET_PAGE_MASK) +
(addr & ~TARGET_PAGE_MASK);
val = ldl_p(ptr);
}
return val;
}
/* warning: addr must be aligned. The ram page is not masked as dirty
and the code inside is not invalidated. It is useful if the dirty
bits are used to track modified PTEs */
void stl_phys_notdirty(target_phys_addr_t addr, uint32_t val)
{
int io_index;
uint8_t *ptr;
unsigned long pd;
PhysPageDesc *p;
p = phys_page_find(addr >> TARGET_PAGE_BITS);
if (!p) {
pd = IO_MEM_UNASSIGNED;
} else {
pd = p->phys_offset;
}
if ((pd & ~TARGET_PAGE_MASK) != 0) {
io_index = (pd >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
io_mem_write[io_index][2](io_mem_opaque[io_index], addr, val);
} else {
ptr = phys_ram_base + (pd & TARGET_PAGE_MASK) +
(addr & ~TARGET_PAGE_MASK);
stl_p(ptr, val);
}
}
/* warning: addr must be aligned */
/* XXX: optimize code invalidation test */
void stl_phys(target_phys_addr_t addr, uint32_t val)
{
int io_index;
uint8_t *ptr;
unsigned long pd;
PhysPageDesc *p;
p = phys_page_find(addr >> TARGET_PAGE_BITS);
if (!p) {
pd = IO_MEM_UNASSIGNED;
} else {
pd = p->phys_offset;
}
if ((pd & ~TARGET_PAGE_MASK) != 0) {
io_index = (pd >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
io_mem_write[io_index][2](io_mem_opaque[io_index], addr, val);
} else {
unsigned long addr1;
addr1 = (pd & TARGET_PAGE_MASK) + (addr & ~TARGET_PAGE_MASK);
/* RAM case */
ptr = phys_ram_base + addr1;
stl_p(ptr, val);
/* invalidate code */
tb_invalidate_phys_page_range(addr1, addr1 + 4, 0);
/* set dirty bit */
phys_ram_dirty[addr1 >> TARGET_PAGE_BITS] = 1;
}
}
#endif
/* virtual memory access for debug */