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Support for registering address space only for some access widths 

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3879 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
blueswir1 2008-01-01 16:57:19 +00:00
parent 0b09be2b2f
commit 4254fab8f9
2 changed files with 22 additions and 18 deletions
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1
cpu-all.h
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@ -821,6 +821,7 @@ extern uint8_t *phys_ram_dirty;
the physical address */
#define IO_MEM_ROMD (1)
#define IO_MEM_SUBPAGE (2)
#define IO_MEM_SUBWIDTH (4)
typedef void CPUWriteMemoryFunc(void *opaque, target_phys_addr_t addr, uint32_t value);
typedef uint32_t CPUReadMemoryFunc(void *opaque, target_phys_addr_t addr);

39
exec.c
View File

@ -163,8 +163,8 @@ static int tb_phys_invalidate_count;
#define SUBPAGE_IDX(addr) ((addr) & ~TARGET_PAGE_MASK)
typedef struct subpage_t {
target_phys_addr_t base;
CPUReadMemoryFunc **mem_read[TARGET_PAGE_SIZE];
CPUWriteMemoryFunc **mem_write[TARGET_PAGE_SIZE];
CPUReadMemoryFunc *mem_read[TARGET_PAGE_SIZE][4];
CPUWriteMemoryFunc *mem_write[TARGET_PAGE_SIZE][4];
void *opaque[TARGET_PAGE_SIZE];
} subpage_t;
@ -2025,7 +2025,7 @@ void cpu_register_physical_memory(target_phys_addr_t start_addr,
CHECK_SUBPAGE(addr, start_addr, start_addr2, end_addr, end_addr2,
need_subpage);
if (need_subpage) {
if (need_subpage || phys_offset & IO_MEM_SUBWIDTH) {
if (!(orig_memory & IO_MEM_SUBPAGE)) {
subpage = subpage_init((addr & TARGET_PAGE_MASK),
&p->phys_offset, orig_memory);
@ -2053,7 +2053,7 @@ void cpu_register_physical_memory(target_phys_addr_t start_addr,
CHECK_SUBPAGE(addr, start_addr, start_addr2, end_addr,
end_addr2, need_subpage);
if (need_subpage) {
if (need_subpage || phys_offset & IO_MEM_SUBWIDTH) {
subpage = subpage_init((addr & TARGET_PAGE_MASK),
&p->phys_offset, IO_MEM_UNASSIGNED);
subpage_register(subpage, start_addr2, end_addr2,
@ -2308,7 +2308,6 @@ static CPUWriteMemoryFunc *watch_mem_write[3] = {
static inline uint32_t subpage_readlen (subpage_t *mmio, target_phys_addr_t addr,
unsigned int len)
{
CPUReadMemoryFunc **mem_read;
uint32_t ret;
unsigned int idx;
@ -2317,8 +2316,7 @@ static inline uint32_t subpage_readlen (subpage_t *mmio, target_phys_addr_t addr
printf("%s: subpage %p len %d addr " TARGET_FMT_plx " idx %d\n", __func__,
mmio, len, addr, idx);
#endif
mem_read = mmio->mem_read[idx];
ret = (*mem_read[len])(mmio->opaque[idx], addr);
ret = (*mmio->mem_read[idx][len])(mmio->opaque[idx], addr);
return ret;
}
@ -2326,7 +2324,6 @@ static inline uint32_t subpage_readlen (subpage_t *mmio, target_phys_addr_t addr
static inline void subpage_writelen (subpage_t *mmio, target_phys_addr_t addr,
uint32_t value, unsigned int len)
{
CPUWriteMemoryFunc **mem_write;
unsigned int idx;
idx = SUBPAGE_IDX(addr - mmio->base);
@ -2334,8 +2331,7 @@ static inline void subpage_writelen (subpage_t *mmio, target_phys_addr_t addr,
printf("%s: subpage %p len %d addr " TARGET_FMT_plx " idx %d value %08x\n", __func__,
mmio, len, addr, idx, value);
#endif
mem_write = mmio->mem_write[idx];
(*mem_write[len])(mmio->opaque[idx], addr, value);
(*mmio->mem_write[idx][len])(mmio->opaque[idx], addr, value);
}
static uint32_t subpage_readb (void *opaque, target_phys_addr_t addr)
@ -2408,6 +2404,7 @@ static int subpage_register (subpage_t *mmio, uint32_t start, uint32_t end,
int memory)
{
int idx, eidx;
unsigned int i;
if (start >= TARGET_PAGE_SIZE || end >= TARGET_PAGE_SIZE)
return -1;
@ -2419,8 +2416,12 @@ static int subpage_register (subpage_t *mmio, uint32_t start, uint32_t end,
#endif
memory >>= IO_MEM_SHIFT;
for (; idx <= eidx; idx++) {
mmio->mem_read[idx] = io_mem_read[memory];
mmio->mem_write[idx] = io_mem_write[memory];
for (i = 0; i < 4; i++) {
if (io_mem_read[memory][i])
mmio->mem_read[idx][i] = io_mem_read[memory][i];
if (io_mem_write[memory][i])
mmio->mem_write[idx][i] = io_mem_write[memory][i];
}
mmio->opaque[idx] = io_mem_opaque[memory];
}
@ -2466,16 +2467,16 @@ static void io_mem_init(void)
/* mem_read and mem_write are arrays of functions containing the
function to access byte (index 0), word (index 1) and dword (index
2). All functions must be supplied. If io_index is non zero, the
corresponding io zone is modified. If it is zero, a new io zone is
allocated. The return value can be used with
cpu_register_physical_memory(). (-1) is returned if error. */
2). If io_index is non zero, the corresponding io zone is
modified. If it is zero, a new io zone is allocated. The return
value can be used with cpu_register_physical_memory(). (-1) is
returned if error. */
int cpu_register_io_memory(int io_index,
CPUReadMemoryFunc **mem_read,
CPUWriteMemoryFunc **mem_write,
void *opaque)
{
int i;
int i, subwidth = 0;
if (io_index <= 0) {
if (io_mem_nb >= IO_MEM_NB_ENTRIES)
@ -2487,11 +2488,13 @@ int cpu_register_io_memory(int io_index,
}
for(i = 0;i < 3; i++) {
if (!mem_read[i] || !mem_write[i])
subwidth = IO_MEM_SUBWIDTH;
io_mem_read[io_index][i] = mem_read[i];
io_mem_write[io_index][i] = mem_write[i];
}
io_mem_opaque[io_index] = opaque;
return io_index << IO_MEM_SHIFT;
return (io_index << IO_MEM_SHIFT) | subwidth;
}
CPUWriteMemoryFunc **cpu_get_io_memory_write(int io_index)