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[Qemu-devel] [PATCH 02/16] exec: make phys_page_find() return a temporar
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From: |
Avi Kivity |
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Subject: |
[Qemu-devel] [PATCH 02/16] exec: make phys_page_find() return a temporary |
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Date: |
Mon, 2 Jan 2012 18:33:21 +0200 |
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 <address@hidden>
---
exec.c | 148 +++++++++++++++++++++-------------------------------------------
1 files changed, 48 insertions(+), 100 deletions(-)
diff --git a/exec.c b/exec.c
index 507d37c..d21413a 100644
--- a/exec.c
+++ b/exec.c
@@ -438,9 +438,18 @@ static void page_init(void)
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 @@ static void cpu_notify_map_clients(void)
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 @@ static void cpu_notify_map_clients(void)
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);
--
1.7.7.1
- [Qemu-devel] [PATCH 00/16] Kill old-style I/O dispatch, Avi Kivity, 2012/01/02
- [Qemu-devel] [PATCH 01/16] memory: move endianness compensation to memory core, Avi Kivity, 2012/01/02
- [Qemu-devel] [PATCH 11/16] Convert IO_MEM_SUBPAGE_RAM to be a MemoryRegion, Avi Kivity, 2012/01/02
- [Qemu-devel] [PATCH 09/16] Switch cpu_register_physical_memory_log() to use MemoryRegions, Avi Kivity, 2012/01/02
- [Qemu-devel] [PATCH 02/16] exec: make phys_page_find() return a temporary,
Avi Kivity <=
- [Qemu-devel] [PATCH 14/16] Remove IO_MEM_SUBPAGE, Avi Kivity, 2012/01/02
- [Qemu-devel] [PATCH 05/16] Fix wrong region_offset when overlaying a page with another, Avi Kivity, 2012/01/02
- [Qemu-devel] [PATCH 08/16] Convert IO_MEM_{RAM, ROM, UNASSIGNED, NOTDIRTY} to MemoryRegions, Avi Kivity, 2012/01/02
- Re: [Qemu-devel] [PATCH 08/16] Convert IO_MEM_{RAM, ROM, UNASSIGNED, NOTDIRTY} to MemoryRegions, Richard Henderson, 2012/01/02
- Re: [Qemu-devel] [PATCH 08/16] Convert IO_MEM_{RAM, ROM, UNASSIGNED, NOTDIRTY} to MemoryRegions, Stefan Hajnoczi, 2012/01/06
- [Qemu-devel] [PATCH 10/16] Convert the subpage wrapper to be a MemoryRegion, Avi Kivity, 2012/01/02
- [Qemu-devel] [PATCH 12/16] Convert io_mem_watch to be a MemoryRegion, Avi Kivity, 2012/01/02
- [Qemu-devel] [PATCH 07/16] Uninline get_page_addr_code(), Avi Kivity, 2012/01/02
- [Qemu-devel] [PATCH 06/16] Avoid range comparisons on io index types, Avi Kivity, 2012/01/02