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exec: make phys_page_find() return a temporary 

Instead of returning a PhysPageDesc pointer, return a temporary.
This lets us move away from actually storing PhysPageDesc's, and
instead sythesising them when needed.

Signed-off-by: Avi Kivity <avi@redhat.com>
Reviewed-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Avi Kivity 2011-11-20 17:52:22 +02:00
parent be675c9720
commit f1f6e3b86e
1 changed files with 48 additions and 100 deletions
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148
exec.c
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@ -438,9 +438,18 @@ static PhysPageDesc *phys_page_find_alloc(target_phys_addr_t index, int alloc)
return pd + (index & (L2_SIZE - 1));
}
static inline PhysPageDesc *phys_page_find(target_phys_addr_t index)
static inline PhysPageDesc phys_page_find(target_phys_addr_t index)
{
return phys_page_find_alloc(index, 0);
PhysPageDesc *p = phys_page_find_alloc(index, 0);
if (p) {
return *p;
} else {
return (PhysPageDesc) {
.phys_offset = IO_MEM_UNASSIGNED,
.region_offset = index << TARGET_PAGE_BITS,
};
}
}
static void tlb_protect_code(ram_addr_t ram_addr);
@ -1402,15 +1411,11 @@ static void breakpoint_invalidate(CPUState *env, target_ulong pc)
target_phys_addr_t addr;
target_ulong pd;
ram_addr_t ram_addr;
PhysPageDesc *p;
PhysPageDesc p;
addr = cpu_get_phys_page_debug(env, pc);
p = phys_page_find(addr >> TARGET_PAGE_BITS);
if (!p) {
pd = IO_MEM_UNASSIGNED;
} else {
pd = p->phys_offset;
}
pd = p.phys_offset;
ram_addr = (pd & TARGET_PAGE_MASK) | (pc & ~TARGET_PAGE_MASK);
tb_invalidate_phys_page_range(ram_addr, ram_addr + 1, 0);
}
@ -2086,7 +2091,7 @@ void tlb_set_page(CPUState *env, target_ulong vaddr,
target_phys_addr_t paddr, int prot,
int mmu_idx, target_ulong size)
{
PhysPageDesc *p;
PhysPageDesc p;
unsigned long pd;
unsigned int index;
target_ulong address;
@ -2101,11 +2106,7 @@ void tlb_set_page(CPUState *env, target_ulong vaddr,
tlb_add_large_page(env, vaddr, size);
}
p = phys_page_find(paddr >> TARGET_PAGE_BITS);
if (!p) {
pd = IO_MEM_UNASSIGNED;
} else {
pd = p->phys_offset;
}
pd = p.phys_offset;
#if defined(DEBUG_TLB)
printf("tlb_set_page: vaddr=" TARGET_FMT_lx " paddr=0x" TARGET_FMT_plx
" prot=%x idx=%d pd=0x%08lx\n",
@ -2133,11 +2134,7 @@ void tlb_set_page(CPUState *env, target_ulong vaddr,
We can't use the high bits of pd for this because
IO_MEM_ROMD uses these as a ram address. */
iotlb = (pd & ~TARGET_PAGE_MASK);
if (p) {
iotlb += p->region_offset;
} else {
iotlb += paddr;
}
iotlb += p.region_offset;
}
code_address = address;
@ -2523,7 +2520,7 @@ void cpu_register_physical_memory_log(target_phys_addr_t start_addr,
addr = start_addr;
do {
p = phys_page_find(addr >> TARGET_PAGE_BITS);
p = phys_page_find_alloc(addr >> TARGET_PAGE_BITS, 0);
if (p && p->phys_offset != IO_MEM_UNASSIGNED) {
ram_addr_t orig_memory = p->phys_offset;
target_phys_addr_t start_addr2, end_addr2;
@ -3680,7 +3677,7 @@ void cpu_physical_memory_rw(target_phys_addr_t addr, uint8_t *buf,
uint32_t val;
target_phys_addr_t page;
ram_addr_t pd;
PhysPageDesc *p;
PhysPageDesc p;
while (len > 0) {
page = addr & TARGET_PAGE_MASK;
@ -3688,18 +3685,13 @@ void cpu_physical_memory_rw(target_phys_addr_t addr, uint8_t *buf,
if (l > len)
l = len;
p = phys_page_find(page >> TARGET_PAGE_BITS);
if (!p) {
pd = IO_MEM_UNASSIGNED;
} else {
pd = p->phys_offset;
}
pd = p.phys_offset;
if (is_write) {
if ((pd & ~TARGET_PAGE_MASK) != IO_MEM_RAM) {
target_phys_addr_t addr1 = addr;
target_phys_addr_t addr1;
io_index = (pd >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
if (p)
addr1 = (addr & ~TARGET_PAGE_MASK) + p->region_offset;
addr1 = (addr & ~TARGET_PAGE_MASK) + p.region_offset;
/* XXX: could force cpu_single_env to NULL to avoid
potential bugs */
if (l >= 4 && ((addr1 & 3) == 0)) {
@ -3736,11 +3728,10 @@ void cpu_physical_memory_rw(target_phys_addr_t addr, uint8_t *buf,
} else {
if ((pd & ~TARGET_PAGE_MASK) > IO_MEM_ROM &&
!(pd & IO_MEM_ROMD)) {
target_phys_addr_t addr1 = addr;
target_phys_addr_t addr1;
/* I/O case */
io_index = (pd >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
if (p)
addr1 = (addr & ~TARGET_PAGE_MASK) + p->region_offset;
addr1 = (addr & ~TARGET_PAGE_MASK) + p.region_offset;
if (l >= 4 && ((addr1 & 3) == 0)) {
/* 32 bit read access */
val = io_mem_read[io_index][2](io_mem_opaque[io_index], addr1);
@ -3778,7 +3769,7 @@ void cpu_physical_memory_write_rom(target_phys_addr_t addr,
uint8_t *ptr;
target_phys_addr_t page;
unsigned long pd;
PhysPageDesc *p;
PhysPageDesc p;
while (len > 0) {
page = addr & TARGET_PAGE_MASK;
@ -3786,11 +3777,7 @@ void cpu_physical_memory_write_rom(target_phys_addr_t addr,
if (l > len)
l = len;
p = phys_page_find(page >> TARGET_PAGE_BITS);
if (!p) {
pd = IO_MEM_UNASSIGNED;
} else {
pd = p->phys_offset;
}
pd = p.phys_offset;
if ((pd & ~TARGET_PAGE_MASK) != IO_MEM_RAM &&
(pd & ~TARGET_PAGE_MASK) != IO_MEM_ROM &&
@ -3872,7 +3859,7 @@ void *cpu_physical_memory_map(target_phys_addr_t addr,
int l;
target_phys_addr_t page;
unsigned long pd;
PhysPageDesc *p;
PhysPageDesc p;
ram_addr_t raddr = RAM_ADDR_MAX;
ram_addr_t rlen;
void *ret;
@ -3883,11 +3870,7 @@ void *cpu_physical_memory_map(target_phys_addr_t addr,
if (l > len)
l = len;
p = phys_page_find(page >> TARGET_PAGE_BITS);
if (!p) {
pd = IO_MEM_UNASSIGNED;
} else {
pd = p->phys_offset;
}
pd = p.phys_offset;
if ((pd & ~TARGET_PAGE_MASK) != IO_MEM_RAM) {
if (todo || bounce.buffer) {
@ -3964,21 +3947,16 @@ static inline uint32_t ldl_phys_internal(target_phys_addr_t addr,
uint8_t *ptr;
uint32_t val;
unsigned long pd;
PhysPageDesc *p;
PhysPageDesc p;
p = phys_page_find(addr >> TARGET_PAGE_BITS);
if (!p) {
pd = IO_MEM_UNASSIGNED;
} else {
pd = p->phys_offset;
}
pd = p.phys_offset;
if ((pd & ~TARGET_PAGE_MASK) > IO_MEM_ROM &&
!(pd & IO_MEM_ROMD)) {
/* I/O case */
io_index = (pd >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
if (p)
addr = (addr & ~TARGET_PAGE_MASK) + p->region_offset;
addr = (addr & ~TARGET_PAGE_MASK) + p.region_offset;
val = io_mem_read[io_index][2](io_mem_opaque[io_index], addr);
#if defined(TARGET_WORDS_BIGENDIAN)
if (endian == DEVICE_LITTLE_ENDIAN) {
@ -4031,21 +4009,16 @@ static inline uint64_t ldq_phys_internal(target_phys_addr_t addr,
uint8_t *ptr;
uint64_t val;
unsigned long pd;
PhysPageDesc *p;
PhysPageDesc p;
p = phys_page_find(addr >> TARGET_PAGE_BITS);
if (!p) {
pd = IO_MEM_UNASSIGNED;
} else {
pd = p->phys_offset;
}
pd = p.phys_offset;
if ((pd & ~TARGET_PAGE_MASK) > IO_MEM_ROM &&
!(pd & IO_MEM_ROMD)) {
/* I/O case */
io_index = (pd >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
if (p)
addr = (addr & ~TARGET_PAGE_MASK) + p->region_offset;
addr = (addr & ~TARGET_PAGE_MASK) + p.region_offset;
/* XXX This is broken when device endian != cpu endian.
Fix and add "endian" variable check */
@ -4106,21 +4079,16 @@ static inline uint32_t lduw_phys_internal(target_phys_addr_t addr,
uint8_t *ptr;
uint64_t val;
unsigned long pd;
PhysPageDesc *p;
PhysPageDesc p;
p = phys_page_find(addr >> TARGET_PAGE_BITS);
if (!p) {
pd = IO_MEM_UNASSIGNED;
} else {
pd = p->phys_offset;
}
pd = p.phys_offset;
if ((pd & ~TARGET_PAGE_MASK) > IO_MEM_ROM &&
!(pd & IO_MEM_ROMD)) {
/* I/O case */
io_index = (pd >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
if (p)
addr = (addr & ~TARGET_PAGE_MASK) + p->region_offset;
addr = (addr & ~TARGET_PAGE_MASK) + p.region_offset;
val = io_mem_read[io_index][1](io_mem_opaque[io_index], addr);
#if defined(TARGET_WORDS_BIGENDIAN)
if (endian == DEVICE_LITTLE_ENDIAN) {
@ -4173,19 +4141,14 @@ void stl_phys_notdirty(target_phys_addr_t addr, uint32_t val)
int io_index;
uint8_t *ptr;
unsigned long pd;
PhysPageDesc *p;
PhysPageDesc p;
p = phys_page_find(addr >> TARGET_PAGE_BITS);
if (!p) {
pd = IO_MEM_UNASSIGNED;
} else {
pd = p->phys_offset;
}
pd = p.phys_offset;
if ((pd & ~TARGET_PAGE_MASK) != IO_MEM_RAM) {
io_index = (pd >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
if (p)
addr = (addr & ~TARGET_PAGE_MASK) + p->region_offset;
addr = (addr & ~TARGET_PAGE_MASK) + p.region_offset;
io_mem_write[io_index][2](io_mem_opaque[io_index], addr, val);
} else {
unsigned long addr1 = (pd & TARGET_PAGE_MASK) + (addr & ~TARGET_PAGE_MASK);
@ -4209,19 +4172,14 @@ void stq_phys_notdirty(target_phys_addr_t addr, uint64_t val)
int io_index;
uint8_t *ptr;
unsigned long pd;
PhysPageDesc *p;
PhysPageDesc p;
p = phys_page_find(addr >> TARGET_PAGE_BITS);
if (!p) {
pd = IO_MEM_UNASSIGNED;
} else {
pd = p->phys_offset;
}
pd = p.phys_offset;
if ((pd & ~TARGET_PAGE_MASK) != IO_MEM_RAM) {
io_index = (pd >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
if (p)
addr = (addr & ~TARGET_PAGE_MASK) + p->region_offset;
addr = (addr & ~TARGET_PAGE_MASK) + p.region_offset;
#ifdef TARGET_WORDS_BIGENDIAN
io_mem_write[io_index][2](io_mem_opaque[io_index], addr, val >> 32);
io_mem_write[io_index][2](io_mem_opaque[io_index], addr + 4, val);
@ -4243,19 +4201,14 @@ static inline void stl_phys_internal(target_phys_addr_t addr, uint32_t val,
int io_index;
uint8_t *ptr;
unsigned long pd;
PhysPageDesc *p;
PhysPageDesc p;
p = phys_page_find(addr >> TARGET_PAGE_BITS);
if (!p) {
pd = IO_MEM_UNASSIGNED;
} else {
pd = p->phys_offset;
}
pd = p.phys_offset;
if ((pd & ~TARGET_PAGE_MASK) != IO_MEM_RAM) {
io_index = (pd >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
if (p)
addr = (addr & ~TARGET_PAGE_MASK) + p->region_offset;
addr = (addr & ~TARGET_PAGE_MASK) + p.region_offset;
#if defined(TARGET_WORDS_BIGENDIAN)
if (endian == DEVICE_LITTLE_ENDIAN) {
val = bswap32(val);
@ -4321,19 +4274,14 @@ static inline void stw_phys_internal(target_phys_addr_t addr, uint32_t val,
int io_index;
uint8_t *ptr;
unsigned long pd;
PhysPageDesc *p;
PhysPageDesc p;
p = phys_page_find(addr >> TARGET_PAGE_BITS);
if (!p) {
pd = IO_MEM_UNASSIGNED;
} else {
pd = p->phys_offset;
}
pd = p.phys_offset;
if ((pd & ~TARGET_PAGE_MASK) != IO_MEM_RAM) {
io_index = (pd >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
if (p)
addr = (addr & ~TARGET_PAGE_MASK) + p->region_offset;
addr = (addr & ~TARGET_PAGE_MASK) + p.region_offset;
#if defined(TARGET_WORDS_BIGENDIAN)
if (endian == DEVICE_LITTLE_ENDIAN) {
val = bswap16(val);