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memory: make phys_page_find() return an unadjusted section 

We'd like to store the section index in the iotlb, so we can't
adjust it before returning.  Return an unadjusted section and
instead introduce section_addr(), which does the adjustment later.

Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Avi Kivity 2012-03-08 16:16:34 +02:00
parent e32605062c
commit f3705d5329
1 changed files with 102 additions and 116 deletions
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218
exec.c
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@ -480,13 +480,11 @@ static void phys_page_set(target_phys_addr_t index, target_phys_addr_t nb,
phys_page_set_level(&phys_map, &index, &nb, leaf, P_L2_LEVELS - 1);
}
static MemoryRegionSection phys_page_find(target_phys_addr_t index)
static MemoryRegionSection *phys_page_find(target_phys_addr_t index)
{
PhysPageEntry lp = phys_map;
PhysPageEntry *p;
int i;
MemoryRegionSection section;
target_phys_addr_t delta;
uint16_t s_index = phys_section_unassigned;
for (i = P_L2_LEVELS - 1; i >= 0 && !lp.is_leaf; i--) {
@ -499,15 +497,15 @@ static MemoryRegionSection phys_page_find(target_phys_addr_t index)
s_index = lp.ptr;
not_found:
section = phys_sections[s_index];
index <<= TARGET_PAGE_BITS;
assert(section.offset_within_address_space <= index
&& index <= section.offset_within_address_space + section.size-1);
delta = index - section.offset_within_address_space;
section.offset_within_address_space += delta;
section.offset_within_region += delta;
section.size -= delta;
return section;
return &phys_sections[s_index];
}
static target_phys_addr_t section_addr(MemoryRegionSection *section,
target_phys_addr_t addr)
{
addr -= section->offset_within_address_space;
addr += section->offset_within_region;
return addr;
}
static void tlb_protect_code(ram_addr_t ram_addr);
@ -1468,17 +1466,16 @@ static void breakpoint_invalidate(CPUState *env, target_ulong pc)
{
target_phys_addr_t addr;
ram_addr_t ram_addr;
MemoryRegionSection section;
MemoryRegionSection *section;
addr = cpu_get_phys_page_debug(env, pc);
section = phys_page_find(addr >> TARGET_PAGE_BITS);
if (!(memory_region_is_ram(section.mr)
|| (section.mr->rom_device && section.mr->readable))) {
if (!(memory_region_is_ram(section->mr)
|| (section->mr->rom_device && section->mr->readable))) {
return;
}
ram_addr = (memory_region_get_ram_addr(section.mr)
+ section.offset_within_region) & TARGET_PAGE_MASK;
ram_addr |= (pc & ~TARGET_PAGE_MASK);
ram_addr = (memory_region_get_ram_addr(section->mr) & TARGET_PAGE_MASK)
+ section_addr(section, addr);
tb_invalidate_phys_page_range(ram_addr, ram_addr + 1, 0);
}
#endif
@ -2181,7 +2178,7 @@ void tlb_set_page(CPUState *env, target_ulong vaddr,
target_phys_addr_t paddr, int prot,
int mmu_idx, target_ulong size)
{
MemoryRegionSection section;
MemoryRegionSection *section;
unsigned int index;
target_ulong address;
target_ulong code_address;
@ -2202,21 +2199,21 @@ void tlb_set_page(CPUState *env, target_ulong vaddr,
#endif
address = vaddr;
if (!is_ram_rom_romd(&section)) {
if (!is_ram_rom_romd(section)) {
/* IO memory case (romd handled later) */
address |= TLB_MMIO;
}
if (is_ram_rom_romd(&section)) {
addend = (unsigned long)(memory_region_get_ram_ptr(section.mr)
+ section.offset_within_region);
if (is_ram_rom_romd(section)) {
addend = (unsigned long)memory_region_get_ram_ptr(section->mr)
+ section_addr(section, paddr);
} else {
addend = 0;
}
if (is_ram_rom(&section)) {
if (is_ram_rom(section)) {
/* Normal RAM. */
iotlb = (memory_region_get_ram_addr(section.mr)
+ section.offset_within_region) & TARGET_PAGE_MASK;
if (!section.readonly)
iotlb = (memory_region_get_ram_addr(section->mr) & TARGET_PAGE_MASK)
+ section_addr(section, paddr);
if (!section->readonly)
iotlb |= io_mem_notdirty.ram_addr;
else
iotlb |= io_mem_rom.ram_addr;
@ -2227,8 +2224,8 @@ void tlb_set_page(CPUState *env, target_ulong vaddr,
and avoid full address decoding in every device.
We can't use the high bits of pd for this because
IO_MEM_ROMD uses these as a ram address. */
iotlb = memory_region_get_ram_addr(section.mr) & ~TARGET_PAGE_MASK;
iotlb += section.offset_within_region;
iotlb = memory_region_get_ram_addr(section->mr) & ~TARGET_PAGE_MASK;
iotlb += section_addr(section, paddr);
}
code_address = address;
@ -2261,14 +2258,14 @@ void tlb_set_page(CPUState *env, target_ulong vaddr,
te->addr_code = -1;
}
if (prot & PAGE_WRITE) {
if ((memory_region_is_ram(section.mr) && section.readonly)
|| is_romd(&section)) {
if ((memory_region_is_ram(section->mr) && section->readonly)
|| is_romd(section)) {
/* Write access calls the I/O callback. */
te->addr_write = address | TLB_MMIO;
} else if (memory_region_is_ram(section.mr)
} else if (memory_region_is_ram(section->mr)
&& !cpu_physical_memory_is_dirty(
section.mr->ram_addr
+ section.offset_within_region)) {
section->mr->ram_addr
+ section_addr(section, paddr))) {
te->addr_write = address | TLB_NOTDIRTY;
} else {
te->addr_write = address;
@ -2631,22 +2628,22 @@ static void register_subpage(MemoryRegionSection *section)
subpage_t *subpage;
target_phys_addr_t base = section->offset_within_address_space
& TARGET_PAGE_MASK;
MemoryRegionSection existing = phys_page_find(base >> TARGET_PAGE_BITS);
MemoryRegionSection *existing = phys_page_find(base >> TARGET_PAGE_BITS);
MemoryRegionSection subsection = {
.offset_within_address_space = base,
.size = TARGET_PAGE_SIZE,
};
target_phys_addr_t start, end;
assert(existing.mr->subpage || existing.mr == &io_mem_unassigned);
assert(existing->mr->subpage || existing->mr == &io_mem_unassigned);
if (!(existing.mr->subpage)) {
if (!(existing->mr->subpage)) {
subpage = subpage_init(base);
subsection.mr = &subpage->iomem;
phys_page_set(base >> TARGET_PAGE_BITS, 1,
phys_section_add(&subsection));
} else {
subpage = container_of(existing.mr, subpage_t, iomem);
subpage = container_of(existing->mr, subpage_t, iomem);
}
start = section->offset_within_address_space & ~TARGET_PAGE_MASK;
end = start + section->size;
@ -3830,7 +3827,7 @@ void cpu_physical_memory_rw(target_phys_addr_t addr, uint8_t *buf,
uint8_t *ptr;
uint32_t val;
target_phys_addr_t page;
MemoryRegionSection section;
MemoryRegionSection *section;
while (len > 0) {
page = addr & TARGET_PAGE_MASK;
@ -3840,12 +3837,11 @@ void cpu_physical_memory_rw(target_phys_addr_t addr, uint8_t *buf,
section = phys_page_find(page >> TARGET_PAGE_BITS);
if (is_write) {
if (!memory_region_is_ram(section.mr)) {
if (!memory_region_is_ram(section->mr)) {
target_phys_addr_t addr1;
io_index = memory_region_get_ram_addr(section.mr)
io_index = memory_region_get_ram_addr(section->mr)
& (IO_MEM_NB_ENTRIES - 1);
addr1 = (addr & ~TARGET_PAGE_MASK)
+ section.offset_within_region;
addr1 = section_addr(section, addr);
/* XXX: could force cpu_single_env to NULL to avoid
potential bugs */
if (l >= 4 && ((addr1 & 3) == 0)) {
@ -3864,11 +3860,10 @@ void cpu_physical_memory_rw(target_phys_addr_t addr, uint8_t *buf,
io_mem_write(io_index, addr1, val, 1);
l = 1;
}
} else if (!section.readonly) {
} else if (!section->readonly) {
ram_addr_t addr1;
addr1 = (memory_region_get_ram_addr(section.mr)
+ section.offset_within_region)
| (addr & ~TARGET_PAGE_MASK);
addr1 = memory_region_get_ram_addr(section->mr)
+ section_addr(section, addr);
/* RAM case */
ptr = qemu_get_ram_ptr(addr1);
memcpy(ptr, buf, l);
@ -3882,13 +3877,12 @@ void cpu_physical_memory_rw(target_phys_addr_t addr, uint8_t *buf,
qemu_put_ram_ptr(ptr);
}
} else {
if (!is_ram_rom_romd(&section)) {
if (!is_ram_rom_romd(section)) {
target_phys_addr_t addr1;
/* I/O case */
io_index = memory_region_get_ram_addr(section.mr)
io_index = memory_region_get_ram_addr(section->mr)
& (IO_MEM_NB_ENTRIES - 1);
addr1 = (addr & ~TARGET_PAGE_MASK)
+ section.offset_within_region;
addr1 = section_addr(section, addr);
if (l >= 4 && ((addr1 & 3) == 0)) {
/* 32 bit read access */
val = io_mem_read(io_index, addr1, 4);
@ -3907,9 +3901,9 @@ void cpu_physical_memory_rw(target_phys_addr_t addr, uint8_t *buf,
}
} else {
/* RAM case */
ptr = qemu_get_ram_ptr(section.mr->ram_addr
+ section.offset_within_region);
memcpy(buf, ptr + (addr & ~TARGET_PAGE_MASK), l);
ptr = qemu_get_ram_ptr(section->mr->ram_addr)
+ section_addr(section, addr);
memcpy(buf, ptr, l);
qemu_put_ram_ptr(ptr);
}
}
@ -3926,7 +3920,7 @@ void cpu_physical_memory_write_rom(target_phys_addr_t addr,
int l;
uint8_t *ptr;
target_phys_addr_t page;
MemoryRegionSection section;
MemoryRegionSection *section;
while (len > 0) {
page = addr & TARGET_PAGE_MASK;
@ -3935,13 +3929,12 @@ void cpu_physical_memory_write_rom(target_phys_addr_t addr,
l = len;
section = phys_page_find(page >> TARGET_PAGE_BITS);
if (!is_ram_rom_romd(&section)) {
if (!is_ram_rom_romd(section)) {
/* do nothing */
} else {
unsigned long addr1;
addr1 = (memory_region_get_ram_addr(section.mr)
+ section.offset_within_region)
+ (addr & ~TARGET_PAGE_MASK);
addr1 = memory_region_get_ram_addr(section->mr)
+ section_addr(section, addr);
/* ROM/RAM case */
ptr = qemu_get_ram_ptr(addr1);
memcpy(ptr, buf, l);
@ -4014,7 +4007,7 @@ void *cpu_physical_memory_map(target_phys_addr_t addr,
target_phys_addr_t todo = 0;
int l;
target_phys_addr_t page;
MemoryRegionSection section;
MemoryRegionSection *section;
ram_addr_t raddr = RAM_ADDR_MAX;
ram_addr_t rlen;
void *ret;
@ -4026,7 +4019,7 @@ void *cpu_physical_memory_map(target_phys_addr_t addr,
l = len;
section = phys_page_find(page >> TARGET_PAGE_BITS);
if (!(memory_region_is_ram(section.mr) && !section.readonly)) {
if (!(memory_region_is_ram(section->mr) && !section->readonly)) {
if (todo || bounce.buffer) {
break;
}
@ -4041,9 +4034,8 @@ void *cpu_physical_memory_map(target_phys_addr_t addr,
return bounce.buffer;
}
if (!todo) {
raddr = memory_region_get_ram_addr(section.mr)
+ section.offset_within_region
+ (addr & ~TARGET_PAGE_MASK);
raddr = memory_region_get_ram_addr(section->mr)
+ section_addr(section, addr);
}
len -= l;
@ -4102,15 +4094,15 @@ static inline uint32_t ldl_phys_internal(target_phys_addr_t addr,
int io_index;
uint8_t *ptr;
uint32_t val;
MemoryRegionSection section;
MemoryRegionSection *section;
section = phys_page_find(addr >> TARGET_PAGE_BITS);
if (!is_ram_rom_romd(&section)) {
if (!is_ram_rom_romd(section)) {
/* I/O case */
io_index = memory_region_get_ram_addr(section.mr)
io_index = memory_region_get_ram_addr(section->mr)
& (IO_MEM_NB_ENTRIES - 1);
addr = (addr & ~TARGET_PAGE_MASK) + section.offset_within_region;
addr = section_addr(section, addr);
val = io_mem_read(io_index, addr, 4);
#if defined(TARGET_WORDS_BIGENDIAN)
if (endian == DEVICE_LITTLE_ENDIAN) {
@ -4123,10 +4115,9 @@ static inline uint32_t ldl_phys_internal(target_phys_addr_t addr,
#endif
} else {
/* RAM case */
ptr = qemu_get_ram_ptr((memory_region_get_ram_addr(section.mr)
ptr = qemu_get_ram_ptr((memory_region_get_ram_addr(section->mr)
& TARGET_PAGE_MASK)
+ section.offset_within_region) +
(addr & ~TARGET_PAGE_MASK);
+ section_addr(section, addr));
switch (endian) {
case DEVICE_LITTLE_ENDIAN:
val = ldl_le_p(ptr);
@ -4164,15 +4155,15 @@ static inline uint64_t ldq_phys_internal(target_phys_addr_t addr,
int io_index;
uint8_t *ptr;
uint64_t val;
MemoryRegionSection section;
MemoryRegionSection *section;
section = phys_page_find(addr >> TARGET_PAGE_BITS);
if (!is_ram_rom_romd(&section)) {
if (!is_ram_rom_romd(section)) {
/* I/O case */
io_index = memory_region_get_ram_addr(section.mr)
io_index = memory_region_get_ram_addr(section->mr)
& (IO_MEM_NB_ENTRIES - 1);
addr = (addr & ~TARGET_PAGE_MASK) + section.offset_within_region;
addr = section_addr(section, addr);
/* XXX This is broken when device endian != cpu endian.
Fix and add "endian" variable check */
@ -4185,10 +4176,9 @@ static inline uint64_t ldq_phys_internal(target_phys_addr_t addr,
#endif
} else {
/* RAM case */
ptr = qemu_get_ram_ptr((memory_region_get_ram_addr(section.mr)
ptr = qemu_get_ram_ptr((memory_region_get_ram_addr(section->mr)
& TARGET_PAGE_MASK)
+ section.offset_within_region)
+ (addr & ~TARGET_PAGE_MASK);
+ section_addr(section, addr));
switch (endian) {
case DEVICE_LITTLE_ENDIAN:
val = ldq_le_p(ptr);
@ -4234,15 +4224,15 @@ static inline uint32_t lduw_phys_internal(target_phys_addr_t addr,
int io_index;
uint8_t *ptr;
uint64_t val;
MemoryRegionSection section;
MemoryRegionSection *section;
section = phys_page_find(addr >> TARGET_PAGE_BITS);
if (!is_ram_rom_romd(&section)) {
if (!is_ram_rom_romd(section)) {
/* I/O case */
io_index = memory_region_get_ram_addr(section.mr)
io_index = memory_region_get_ram_addr(section->mr)
& (IO_MEM_NB_ENTRIES - 1);
addr = (addr & ~TARGET_PAGE_MASK) + section.offset_within_region;
addr = section_addr(section, addr);
val = io_mem_read(io_index, addr, 2);
#if defined(TARGET_WORDS_BIGENDIAN)
if (endian == DEVICE_LITTLE_ENDIAN) {
@ -4255,10 +4245,9 @@ static inline uint32_t lduw_phys_internal(target_phys_addr_t addr,
#endif
} else {
/* RAM case */
ptr = qemu_get_ram_ptr((memory_region_get_ram_addr(section.mr)
ptr = qemu_get_ram_ptr((memory_region_get_ram_addr(section->mr)
& TARGET_PAGE_MASK)
+ section.offset_within_region)
+ (addr & ~TARGET_PAGE_MASK);
+ section_addr(section, addr));
switch (endian) {
case DEVICE_LITTLE_ENDIAN:
val = lduw_le_p(ptr);
@ -4296,23 +4285,22 @@ void stl_phys_notdirty(target_phys_addr_t addr, uint32_t val)
{
int io_index;
uint8_t *ptr;
MemoryRegionSection section;
MemoryRegionSection *section;
section = phys_page_find(addr >> TARGET_PAGE_BITS);
if (!memory_region_is_ram(section.mr) || section.readonly) {
if (memory_region_is_ram(section.mr)) {
if (!memory_region_is_ram(section->mr) || section->readonly) {
if (memory_region_is_ram(section->mr)) {
io_index = io_mem_rom.ram_addr;
} else {
io_index = memory_region_get_ram_addr(section.mr);
io_index = memory_region_get_ram_addr(section->mr);
}
addr = (addr & ~TARGET_PAGE_MASK) + section.offset_within_region;
addr = section_addr(section, addr);
io_mem_write(io_index, addr, val, 4);
} else {
unsigned long addr1 = (memory_region_get_ram_addr(section.mr)
unsigned long addr1 = (memory_region_get_ram_addr(section->mr)
& TARGET_PAGE_MASK)
+ section.offset_within_region
+ (addr & ~TARGET_PAGE_MASK);
+ section_addr(section, addr);
ptr = qemu_get_ram_ptr(addr1);
stl_p(ptr, val);
@ -4332,18 +4320,18 @@ void stq_phys_notdirty(target_phys_addr_t addr, uint64_t val)
{
int io_index;
uint8_t *ptr;
MemoryRegionSection section;
MemoryRegionSection *section;
section = phys_page_find(addr >> TARGET_PAGE_BITS);
if (!memory_region_is_ram(section.mr) || section.readonly) {
if (memory_region_is_ram(section.mr)) {
if (!memory_region_is_ram(section->mr) || section->readonly) {
if (memory_region_is_ram(section->mr)) {
io_index = io_mem_rom.ram_addr;
} else {
io_index = memory_region_get_ram_addr(section.mr)
io_index = memory_region_get_ram_addr(section->mr)
& (IO_MEM_NB_ENTRIES - 1);
}
addr = (addr & ~TARGET_PAGE_MASK) + section.offset_within_region;
addr = section_addr(section, addr);
#ifdef TARGET_WORDS_BIGENDIAN
io_mem_write(io_index, addr, val >> 32, 4);
io_mem_write(io_index, addr + 4, (uint32_t)val, 4);
@ -4352,10 +4340,9 @@ void stq_phys_notdirty(target_phys_addr_t addr, uint64_t val)
io_mem_write(io_index, addr + 4, val >> 32, 4);
#endif
} else {
ptr = qemu_get_ram_ptr((memory_region_get_ram_addr(section.mr)
ptr = qemu_get_ram_ptr((memory_region_get_ram_addr(section->mr)
& TARGET_PAGE_MASK)
+ section.offset_within_region)
+ (addr & ~TARGET_PAGE_MASK);
+ section_addr(section, addr));
stq_p(ptr, val);
}
}
@ -4366,18 +4353,18 @@ static inline void stl_phys_internal(target_phys_addr_t addr, uint32_t val,
{
int io_index;
uint8_t *ptr;
MemoryRegionSection section;
MemoryRegionSection *section;
section = phys_page_find(addr >> TARGET_PAGE_BITS);
if (!memory_region_is_ram(section.mr) || section.readonly) {
if (memory_region_is_ram(section.mr)) {
if (!memory_region_is_ram(section->mr) || section->readonly) {
if (memory_region_is_ram(section->mr)) {
io_index = io_mem_rom.ram_addr;
} else {
io_index = memory_region_get_ram_addr(section.mr)
io_index = memory_region_get_ram_addr(section->mr)
& (IO_MEM_NB_ENTRIES - 1);
}
addr = (addr & ~TARGET_PAGE_MASK) + section.offset_within_region;
addr = section_addr(section, addr);
#if defined(TARGET_WORDS_BIGENDIAN)
if (endian == DEVICE_LITTLE_ENDIAN) {
val = bswap32(val);
@ -4390,9 +4377,8 @@ static inline void stl_phys_internal(target_phys_addr_t addr, uint32_t val,
io_mem_write(io_index, addr, val, 4);
} else {
unsigned long addr1;
addr1 = (memory_region_get_ram_addr(section.mr) & TARGET_PAGE_MASK)
+ section.offset_within_region
+ (addr & ~TARGET_PAGE_MASK);
addr1 = (memory_region_get_ram_addr(section->mr) & TARGET_PAGE_MASK)
+ section_addr(section, addr);
/* RAM case */
ptr = qemu_get_ram_ptr(addr1);
switch (endian) {
@ -4444,18 +4430,18 @@ static inline void stw_phys_internal(target_phys_addr_t addr, uint32_t val,
{
int io_index;
uint8_t *ptr;
MemoryRegionSection section;
MemoryRegionSection *section;
section = phys_page_find(addr >> TARGET_PAGE_BITS);
if (!memory_region_is_ram(section.mr) || section.readonly) {
if (memory_region_is_ram(section.mr)) {
if (!memory_region_is_ram(section->mr) || section->readonly) {
if (memory_region_is_ram(section->mr)) {
io_index = io_mem_rom.ram_addr;
} else {
io_index = memory_region_get_ram_addr(section.mr)
io_index = memory_region_get_ram_addr(section->mr)
& (IO_MEM_NB_ENTRIES - 1);
}
addr = (addr & ~TARGET_PAGE_MASK) + section.offset_within_region;
addr = section_addr(section, addr);
#if defined(TARGET_WORDS_BIGENDIAN)
if (endian == DEVICE_LITTLE_ENDIAN) {
val = bswap16(val);
@ -4468,8 +4454,8 @@ static inline void stw_phys_internal(target_phys_addr_t addr, uint32_t val,
io_mem_write(io_index, addr, val, 2);
} else {
unsigned long addr1;
addr1 = (memory_region_get_ram_addr(section.mr) & TARGET_PAGE_MASK)
+ section.offset_within_region + (addr & ~TARGET_PAGE_MASK);
addr1 = (memory_region_get_ram_addr(section->mr) & TARGET_PAGE_MASK)
+ section_addr(section, addr);
/* RAM case */
ptr = qemu_get_ram_ptr(addr1);
switch (endian) {