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Convert IO_MEM_SUBPAGE_RAM to be a MemoryRegion 

Signed-off-by: Avi Kivity <avi@redhat.com>
Reviewed-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Avi Kivity 2012-01-02 12:41:07 +02:00
parent 70c68e44bc
commit de712f9469
2 changed files with 24 additions and 49 deletions
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1
cpu-common.h
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@ -113,7 +113,6 @@ extern struct MemoryRegion io_mem_ram;
extern struct MemoryRegion io_mem_rom;
extern struct MemoryRegion io_mem_unassigned;
extern struct MemoryRegion io_mem_notdirty;
#define IO_MEM_SUBPAGE_RAM (4 << IO_MEM_SHIFT)
/* Acts like a ROM when read and like a device when written. */
#define IO_MEM_ROMD (1)

72
exec.c
View File

@ -119,6 +119,7 @@ static MemoryRegion *system_memory;
static MemoryRegion *system_io;
MemoryRegion io_mem_ram, io_mem_rom, io_mem_unassigned, io_mem_notdirty;
static MemoryRegion io_mem_subpage_ram;
#endif
@ -3347,61 +3348,36 @@ static const MemoryRegionOps subpage_ops = {
.endianness = DEVICE_NATIVE_ENDIAN,
};
static uint32_t subpage_ram_readb(void *opaque, target_phys_addr_t addr)
static uint64_t subpage_ram_read(void *opaque, target_phys_addr_t addr,
unsigned size)
{
ram_addr_t raddr = addr;
void *ptr = qemu_get_ram_ptr(raddr);
return ldub_p(ptr);
switch (size) {
case 1: return ldub_p(ptr);
case 2: return lduw_p(ptr);
case 4: return ldl_p(ptr);
default: abort();
}
}
static void subpage_ram_writeb(void *opaque, target_phys_addr_t addr,
uint32_t value)
static void subpage_ram_write(void *opaque, target_phys_addr_t addr,
uint64_t value, unsigned size)
{
ram_addr_t raddr = addr;
void *ptr = qemu_get_ram_ptr(raddr);
stb_p(ptr, value);
switch (size) {
case 1: return stb_p(ptr, value);
case 2: return stw_p(ptr, value);
case 4: return stl_p(ptr, value);
default: abort();
}
}
static uint32_t subpage_ram_readw(void *opaque, target_phys_addr_t addr)
{
ram_addr_t raddr = addr;
void *ptr = qemu_get_ram_ptr(raddr);
return lduw_p(ptr);
}
static void subpage_ram_writew(void *opaque, target_phys_addr_t addr,
uint32_t value)
{
ram_addr_t raddr = addr;
void *ptr = qemu_get_ram_ptr(raddr);
stw_p(ptr, value);
}
static uint32_t subpage_ram_readl(void *opaque, target_phys_addr_t addr)
{
ram_addr_t raddr = addr;
void *ptr = qemu_get_ram_ptr(raddr);
return ldl_p(ptr);
}
static void subpage_ram_writel(void *opaque, target_phys_addr_t addr,
uint32_t value)
{
ram_addr_t raddr = addr;
void *ptr = qemu_get_ram_ptr(raddr);
stl_p(ptr, value);
}
static CPUReadMemoryFunc * const subpage_ram_read[] = {
&subpage_ram_readb,
&subpage_ram_readw,
&subpage_ram_readl,
};
static CPUWriteMemoryFunc * const subpage_ram_write[] = {
&subpage_ram_writeb,
&subpage_ram_writew,
&subpage_ram_writel,
static const MemoryRegionOps subpage_ram_ops = {
.read = subpage_ram_read,
.write = subpage_ram_write,
.endianness = DEVICE_NATIVE_ENDIAN,
};
static int subpage_register (subpage_t *mmio, uint32_t start, uint32_t end,
@ -3418,7 +3394,7 @@ static int subpage_register (subpage_t *mmio, uint32_t start, uint32_t end,
mmio, start, end, idx, eidx, memory);
#endif
if ((memory & ~TARGET_PAGE_MASK) == io_mem_ram.ram_addr) {
memory = IO_MEM_SUBPAGE_RAM;
memory = io_mem_subpage_ram.ram_addr;
}
memory = (memory >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
for (; idx <= eidx; idx++) {
@ -3534,8 +3510,8 @@ static void io_mem_init(void)
"unassigned", UINT64_MAX);
memory_region_init_io(&io_mem_notdirty, &notdirty_mem_ops, NULL,
"notdirty", UINT64_MAX);
cpu_register_io_memory_fixed(IO_MEM_SUBPAGE_RAM, subpage_ram_read,
subpage_ram_write, NULL);
memory_region_init_io(&io_mem_subpage_ram, &subpage_ram_ops, NULL,
"subpage-ram", UINT64_MAX);
for (i=0; i<5; i++)
io_mem_used[i] = 1;