#include "exec/memory-internal.h"
-//#define DEBUG_UNASSIGNED
//#define DEBUG_SUBPAGE
#if !defined(CONFIG_USER_ONLY)
AddressSpace address_space_memory;
DMAContext dma_context_memory;
-MemoryRegion io_mem_rom, io_mem_unassigned, io_mem_notdirty;
-static MemoryRegion io_mem_subpage_ram;
+MemoryRegion io_mem_rom, io_mem_notdirty;
+static MemoryRegion io_mem_unassigned, io_mem_subpage_ram;
#endif
phys_page_set_level(&d->phys_map, &index, &nb, leaf, P_L2_LEVELS - 1);
}
-MemoryRegionSection *phys_page_find(AddressSpaceDispatch *d, hwaddr index)
+static MemoryRegionSection *phys_page_find(AddressSpaceDispatch *d, hwaddr index)
{
PhysPageEntry lp = d->phys_map;
PhysPageEntry *p;
return mr != &io_mem_rom && mr != &io_mem_notdirty && !mr->rom_device
&& mr != &io_mem_watch;
}
+
+MemoryRegionSection *address_space_translate(AddressSpace *as, hwaddr addr,
+ hwaddr *xlat, hwaddr *plen,
+ bool is_write)
+{
+ MemoryRegionSection *section;
+ Int128 diff;
+
+ section = phys_page_find(as->dispatch, addr >> TARGET_PAGE_BITS);
+ /* Compute offset within MemoryRegionSection */
+ addr -= section->offset_within_address_space;
+
+ /* Compute offset within MemoryRegion */
+ *xlat = addr + section->offset_within_region;
+
+ diff = int128_sub(section->mr->size, int128_make64(addr));
+ *plen = MIN(int128_get64(diff), *plen);
+ return section;
+}
#endif
void cpu_exec_init_all(void)
}
hwaddr memory_region_section_get_iotlb(CPUArchState *env,
- MemoryRegionSection *section,
- target_ulong vaddr,
- hwaddr paddr,
- int prot,
- target_ulong *address)
+ MemoryRegionSection *section,
+ target_ulong vaddr,
+ hwaddr paddr, hwaddr xlat,
+ int prot,
+ target_ulong *address)
{
hwaddr iotlb;
CPUWatchpoint *wp;
if (memory_region_is_ram(section->mr)) {
/* Normal RAM. */
iotlb = (memory_region_get_ram_addr(section->mr) & TARGET_PAGE_MASK)
- + memory_region_section_addr(section, paddr);
+ + xlat;
if (!section->readonly) {
iotlb |= phys_section_notdirty;
} else {
}
} else {
iotlb = section - phys_sections;
- iotlb += memory_region_section_addr(section, paddr);
+ iotlb += xlat;
}
/* Make accesses to pages with watchpoints go via the
return ram_addr;
}
-static uint64_t unassigned_mem_read(void *opaque, hwaddr addr,
- unsigned size)
-{
-#ifdef DEBUG_UNASSIGNED
- printf("Unassigned mem read " TARGET_FMT_plx "\n", addr);
-#endif
-#if defined(TARGET_ALPHA) || defined(TARGET_SPARC) || defined(TARGET_MICROBLAZE)
- cpu_unassigned_access(cpu_single_env, addr, 0, 0, 0, size);
-#endif
- return 0;
-}
-
-static void unassigned_mem_write(void *opaque, hwaddr addr,
- uint64_t val, unsigned size)
-{
-#ifdef DEBUG_UNASSIGNED
- printf("Unassigned mem write " TARGET_FMT_plx " = 0x%"PRIx64"\n", addr, val);
-#endif
-#if defined(TARGET_ALPHA) || defined(TARGET_SPARC) || defined(TARGET_MICROBLAZE)
- cpu_unassigned_access(cpu_single_env, addr, 1, 0, 0, size);
-#endif
-}
-
-static const MemoryRegionOps unassigned_mem_ops = {
- .read = unassigned_mem_read,
- .write = unassigned_mem_write,
- .endianness = DEVICE_NATIVE_ENDIAN,
-};
-
-static uint64_t error_mem_read(void *opaque, hwaddr addr,
- unsigned size)
-{
- abort();
-}
-
-static const MemoryRegionOps rom_mem_ops = {
- .read = error_mem_read,
- .write = unassigned_mem_write,
- .endianness = DEVICE_NATIVE_ENDIAN,
-};
-
static void notdirty_mem_write(void *opaque, hwaddr ram_addr,
uint64_t val, unsigned size)
{
tlb_set_dirty(cpu_single_env, cpu_single_env->mem_io_vaddr);
}
+static bool notdirty_mem_accepts(void *opaque, hwaddr addr,
+ unsigned size, bool is_write)
+{
+ return is_write;
+}
+
static const MemoryRegionOps notdirty_mem_ops = {
- .read = error_mem_read,
.write = notdirty_mem_write,
+ .valid.accepts = notdirty_mem_accepts,
.endianness = DEVICE_NATIVE_ENDIAN,
};
{
subpage_t *mmio = opaque;
unsigned int idx = SUBPAGE_IDX(addr);
+ uint64_t val;
+
MemoryRegionSection *section;
#if defined(DEBUG_SUBPAGE)
printf("%s: subpage %p len %d addr " TARGET_FMT_plx " idx %d\n", __func__,
addr += mmio->base;
addr -= section->offset_within_address_space;
addr += section->offset_within_region;
- return io_mem_read(section->mr, addr, len);
+ io_mem_read(section->mr, addr, &val, len);
+ return val;
}
static void subpage_write(void *opaque, hwaddr addr,
io_mem_write(section->mr, addr, value, len);
}
+static bool subpage_accepts(void *opaque, hwaddr addr,
+ unsigned size, bool is_write)
+{
+ subpage_t *mmio = opaque;
+ unsigned int idx = SUBPAGE_IDX(addr);
+ MemoryRegionSection *section;
+#if defined(DEBUG_SUBPAGE)
+ printf("%s: subpage %p %c len %d addr " TARGET_FMT_plx
+ " idx %d\n", __func__, mmio,
+ is_write ? 'w' : 'r', len, addr, idx);
+#endif
+
+ section = &phys_sections[mmio->sub_section[idx]];
+ addr += mmio->base;
+ addr -= section->offset_within_address_space;
+ addr += section->offset_within_region;
+ return memory_region_access_valid(section->mr, addr, size, is_write);
+}
+
static const MemoryRegionOps subpage_ops = {
.read = subpage_read,
.write = subpage_write,
+ .valid.accepts = subpage_accepts,
.endianness = DEVICE_NATIVE_ENDIAN,
};
static void io_mem_init(void)
{
- memory_region_init_io(&io_mem_rom, &rom_mem_ops, NULL, "rom", UINT64_MAX);
+ memory_region_init_io(&io_mem_rom, &unassigned_mem_ops, NULL, "rom", UINT64_MAX);
memory_region_init_io(&io_mem_unassigned, &unassigned_mem_ops, NULL,
"unassigned", UINT64_MAX);
memory_region_init_io(&io_mem_notdirty, ¬dirty_mem_ops, NULL,
xen_modified_memory(addr, length);
}
-void address_space_rw(AddressSpace *as, hwaddr addr, uint8_t *buf,
+static inline bool memory_access_is_direct(MemoryRegion *mr, bool is_write)
+{
+ if (memory_region_is_ram(mr)) {
+ return !(is_write && mr->readonly);
+ }
+ if (memory_region_is_romd(mr)) {
+ return !is_write;
+ }
+
+ return false;
+}
+
+static inline int memory_access_size(int l, hwaddr addr)
+{
+ if (l >= 4 && ((addr & 3) == 0)) {
+ return 4;
+ }
+ if (l >= 2 && ((addr & 1) == 0)) {
+ return 2;
+ }
+ return 1;
+}
+
+bool address_space_rw(AddressSpace *as, hwaddr addr, uint8_t *buf,
int len, bool is_write)
{
- AddressSpaceDispatch *d = as->dispatch;
- int l;
+ hwaddr l;
uint8_t *ptr;
- uint32_t val;
- hwaddr page;
+ uint64_t val;
+ hwaddr addr1;
MemoryRegionSection *section;
+ bool error = false;
while (len > 0) {
- page = addr & TARGET_PAGE_MASK;
- l = (page + TARGET_PAGE_SIZE) - addr;
- if (l > len)
- l = len;
- section = phys_page_find(d, page >> TARGET_PAGE_BITS);
+ l = len;
+ section = address_space_translate(as, addr, &addr1, &l, is_write);
if (is_write) {
- if (!memory_region_is_ram(section->mr)) {
- hwaddr addr1;
- addr1 = memory_region_section_addr(section, addr);
+ if (!memory_access_is_direct(section->mr, is_write)) {
+ l = memory_access_size(l, addr1);
/* XXX: could force cpu_single_env to NULL to avoid
potential bugs */
- if (l >= 4 && ((addr1 & 3) == 0)) {
+ if (l == 4) {
/* 32 bit write access */
val = ldl_p(buf);
- io_mem_write(section->mr, addr1, val, 4);
- l = 4;
- } else if (l >= 2 && ((addr1 & 1) == 0)) {
+ error |= io_mem_write(section->mr, addr1, val, 4);
+ } else if (l == 2) {
/* 16 bit write access */
val = lduw_p(buf);
- io_mem_write(section->mr, addr1, val, 2);
- l = 2;
+ error |= io_mem_write(section->mr, addr1, val, 2);
} else {
/* 8 bit write access */
val = ldub_p(buf);
- io_mem_write(section->mr, addr1, val, 1);
- l = 1;
+ error |= io_mem_write(section->mr, addr1, val, 1);
}
- } else if (!section->readonly) {
- ram_addr_t addr1;
- addr1 = memory_region_get_ram_addr(section->mr)
- + memory_region_section_addr(section, addr);
+ } else {
+ addr1 += memory_region_get_ram_addr(section->mr);
/* RAM case */
ptr = qemu_get_ram_ptr(addr1);
memcpy(ptr, buf, l);
invalidate_and_set_dirty(addr1, l);
}
} else {
- if (!(memory_region_is_ram(section->mr) ||
- memory_region_is_romd(section->mr))) {
- hwaddr addr1;
+ if (!memory_access_is_direct(section->mr, is_write)) {
/* I/O case */
- addr1 = memory_region_section_addr(section, addr);
- if (l >= 4 && ((addr1 & 3) == 0)) {
+ l = memory_access_size(l, addr1);
+ if (l == 4) {
/* 32 bit read access */
- val = io_mem_read(section->mr, addr1, 4);
+ error |= io_mem_read(section->mr, addr1, &val, 4);
stl_p(buf, val);
- l = 4;
- } else if (l >= 2 && ((addr1 & 1) == 0)) {
+ } else if (l == 2) {
/* 16 bit read access */
- val = io_mem_read(section->mr, addr1, 2);
+ error |= io_mem_read(section->mr, addr1, &val, 2);
stw_p(buf, val);
- l = 2;
} else {
/* 8 bit read access */
- val = io_mem_read(section->mr, addr1, 1);
+ error |= io_mem_read(section->mr, addr1, &val, 1);
stb_p(buf, val);
- l = 1;
}
} else {
/* RAM case */
- ptr = qemu_get_ram_ptr(section->mr->ram_addr
- + memory_region_section_addr(section,
- addr));
+ ptr = qemu_get_ram_ptr(section->mr->ram_addr + addr1);
memcpy(buf, ptr, l);
}
}
buf += l;
addr += l;
}
+
+ return error;
}
-void address_space_write(AddressSpace *as, hwaddr addr,
+bool address_space_write(AddressSpace *as, hwaddr addr,
const uint8_t *buf, int len)
{
- address_space_rw(as, addr, (uint8_t *)buf, len, true);
+ return address_space_rw(as, addr, (uint8_t *)buf, len, true);
}
-/**
- * address_space_read: read from an address space.
- *
- * @as: #AddressSpace to be accessed
- * @addr: address within that address space
- * @buf: buffer with the data transferred
- */
-void address_space_read(AddressSpace *as, hwaddr addr, uint8_t *buf, int len)
+bool address_space_read(AddressSpace *as, hwaddr addr, uint8_t *buf, int len)
{
- address_space_rw(as, addr, buf, len, false);
+ return address_space_rw(as, addr, buf, len, false);
}
void cpu_physical_memory_rw(hwaddr addr, uint8_t *buf,
int len, int is_write)
{
- return address_space_rw(&address_space_memory, addr, buf, len, is_write);
+ address_space_rw(&address_space_memory, addr, buf, len, is_write);
}
/* used for ROM loading : can write in RAM and ROM */
void cpu_physical_memory_write_rom(hwaddr addr,
const uint8_t *buf, int len)
{
- AddressSpaceDispatch *d = address_space_memory.dispatch;
- int l;
+ hwaddr l;
uint8_t *ptr;
- hwaddr page;
+ hwaddr addr1;
MemoryRegionSection *section;
while (len > 0) {
- page = addr & TARGET_PAGE_MASK;
- l = (page + TARGET_PAGE_SIZE) - addr;
- if (l > len)
- l = len;
- section = phys_page_find(d, page >> TARGET_PAGE_BITS);
+ l = len;
+ section = address_space_translate(&address_space_memory,
+ addr, &addr1, &l, true);
if (!(memory_region_is_ram(section->mr) ||
memory_region_is_romd(section->mr))) {
/* do nothing */
} else {
- unsigned long addr1;
- addr1 = memory_region_get_ram_addr(section->mr)
- + memory_region_section_addr(section, addr);
+ addr1 += memory_region_get_ram_addr(section->mr);
/* ROM/RAM case */
ptr = qemu_get_ram_ptr(addr1);
memcpy(ptr, buf, l);
}
}
+bool address_space_access_valid(AddressSpace *as, hwaddr addr, int len, bool is_write)
+{
+ MemoryRegionSection *section;
+ hwaddr l, xlat;
+
+ while (len > 0) {
+ l = len;
+ section = address_space_translate(as, addr, &xlat, &l, is_write);
+ if (!memory_access_is_direct(section->mr, is_write)) {
+ l = memory_access_size(l, addr);
+ if (!memory_region_access_valid(section->mr, xlat, l, is_write)) {
+ return false;
+ }
+ }
+
+ len -= l;
+ addr += l;
+ }
+ return true;
+}
+
/* Map a physical memory region into a host virtual address.
* May map a subset of the requested range, given by and returned in *plen.
* May return NULL if resources needed to perform the mapping are exhausted.
hwaddr *plen,
bool is_write)
{
- AddressSpaceDispatch *d = as->dispatch;
hwaddr len = *plen;
hwaddr todo = 0;
- int l;
- hwaddr page;
+ hwaddr l, xlat;
MemoryRegionSection *section;
ram_addr_t raddr = RAM_ADDR_MAX;
ram_addr_t rlen;
void *ret;
while (len > 0) {
- page = addr & TARGET_PAGE_MASK;
- l = (page + TARGET_PAGE_SIZE) - addr;
- if (l > len)
- l = len;
- section = phys_page_find(d, page >> TARGET_PAGE_BITS);
+ l = len;
+ section = address_space_translate(as, addr, &xlat, &l, is_write);
- if (!(memory_region_is_ram(section->mr) && !section->readonly)) {
+ if (!memory_access_is_direct(section->mr, is_write)) {
if (todo || bounce.buffer) {
break;
}
return bounce.buffer;
}
if (!todo) {
- raddr = memory_region_get_ram_addr(section->mr)
- + memory_region_section_addr(section, addr);
+ raddr = memory_region_get_ram_addr(section->mr) + xlat;
+ } else {
+ if (memory_region_get_ram_addr(section->mr) + xlat != raddr + todo) {
+ break;
+ }
}
len -= l;
enum device_endian endian)
{
uint8_t *ptr;
- uint32_t val;
+ uint64_t val;
MemoryRegionSection *section;
+ hwaddr l = 4;
+ hwaddr addr1;
- section = phys_page_find(address_space_memory.dispatch, addr >> TARGET_PAGE_BITS);
-
- if (!(memory_region_is_ram(section->mr) ||
- memory_region_is_romd(section->mr))) {
+ section = address_space_translate(&address_space_memory, addr, &addr1, &l,
+ false);
+ if (l < 4 || !memory_access_is_direct(section->mr, false)) {
/* I/O case */
- addr = memory_region_section_addr(section, addr);
- val = io_mem_read(section->mr, addr, 4);
+ io_mem_read(section->mr, addr1, &val, 4);
#if defined(TARGET_WORDS_BIGENDIAN)
if (endian == DEVICE_LITTLE_ENDIAN) {
val = bswap32(val);
/* RAM case */
ptr = qemu_get_ram_ptr((memory_region_get_ram_addr(section->mr)
& TARGET_PAGE_MASK)
- + memory_region_section_addr(section, addr));
+ + addr1);
switch (endian) {
case DEVICE_LITTLE_ENDIAN:
val = ldl_le_p(ptr);
uint8_t *ptr;
uint64_t val;
MemoryRegionSection *section;
+ hwaddr l = 8;
+ hwaddr addr1;
- section = phys_page_find(address_space_memory.dispatch, addr >> TARGET_PAGE_BITS);
-
- if (!(memory_region_is_ram(section->mr) ||
- memory_region_is_romd(section->mr))) {
+ section = address_space_translate(&address_space_memory, addr, &addr1, &l,
+ false);
+ if (l < 8 || !memory_access_is_direct(section->mr, false)) {
/* I/O case */
- addr = memory_region_section_addr(section, addr);
-
- /* XXX This is broken when device endian != cpu endian.
- Fix and add "endian" variable check */
-#ifdef TARGET_WORDS_BIGENDIAN
- val = io_mem_read(section->mr, addr, 4) << 32;
- val |= io_mem_read(section->mr, addr + 4, 4);
+ io_mem_read(section->mr, addr1, &val, 8);
+#if defined(TARGET_WORDS_BIGENDIAN)
+ if (endian == DEVICE_LITTLE_ENDIAN) {
+ val = bswap64(val);
+ }
#else
- val = io_mem_read(section->mr, addr, 4);
- val |= io_mem_read(section->mr, addr + 4, 4) << 32;
+ if (endian == DEVICE_BIG_ENDIAN) {
+ val = bswap64(val);
+ }
#endif
} else {
/* RAM case */
ptr = qemu_get_ram_ptr((memory_region_get_ram_addr(section->mr)
& TARGET_PAGE_MASK)
- + memory_region_section_addr(section, addr));
+ + addr1);
switch (endian) {
case DEVICE_LITTLE_ENDIAN:
val = ldq_le_p(ptr);
uint8_t *ptr;
uint64_t val;
MemoryRegionSection *section;
+ hwaddr l = 2;
+ hwaddr addr1;
- section = phys_page_find(address_space_memory.dispatch, addr >> TARGET_PAGE_BITS);
-
- if (!(memory_region_is_ram(section->mr) ||
- memory_region_is_romd(section->mr))) {
+ section = address_space_translate(&address_space_memory, addr, &addr1, &l,
+ false);
+ if (l < 2 || !memory_access_is_direct(section->mr, false)) {
/* I/O case */
- addr = memory_region_section_addr(section, addr);
- val = io_mem_read(section->mr, addr, 2);
+ io_mem_read(section->mr, addr1, &val, 2);
#if defined(TARGET_WORDS_BIGENDIAN)
if (endian == DEVICE_LITTLE_ENDIAN) {
val = bswap16(val);
/* RAM case */
ptr = qemu_get_ram_ptr((memory_region_get_ram_addr(section->mr)
& TARGET_PAGE_MASK)
- + memory_region_section_addr(section, addr));
+ + addr1);
switch (endian) {
case DEVICE_LITTLE_ENDIAN:
val = lduw_le_p(ptr);
{
uint8_t *ptr;
MemoryRegionSection *section;
+ hwaddr l = 4;
+ hwaddr addr1;
- section = phys_page_find(address_space_memory.dispatch, addr >> TARGET_PAGE_BITS);
-
- if (!memory_region_is_ram(section->mr) || section->readonly) {
- addr = memory_region_section_addr(section, addr);
- if (memory_region_is_ram(section->mr)) {
- section = &phys_sections[phys_section_rom];
- }
- io_mem_write(section->mr, addr, val, 4);
+ section = address_space_translate(&address_space_memory, addr, &addr1, &l,
+ true);
+ if (l < 4 || !memory_access_is_direct(section->mr, true)) {
+ io_mem_write(section->mr, addr1, val, 4);
} else {
- unsigned long addr1 = (memory_region_get_ram_addr(section->mr)
- & TARGET_PAGE_MASK)
- + memory_region_section_addr(section, addr);
+ addr1 += memory_region_get_ram_addr(section->mr) & TARGET_PAGE_MASK;
ptr = qemu_get_ram_ptr(addr1);
stl_p(ptr, val);
{
uint8_t *ptr;
MemoryRegionSection *section;
+ hwaddr l = 4;
+ hwaddr addr1;
- section = phys_page_find(address_space_memory.dispatch, addr >> TARGET_PAGE_BITS);
-
- if (!memory_region_is_ram(section->mr) || section->readonly) {
- addr = memory_region_section_addr(section, addr);
- if (memory_region_is_ram(section->mr)) {
- section = &phys_sections[phys_section_rom];
- }
+ section = address_space_translate(&address_space_memory, addr, &addr1, &l,
+ true);
+ if (l < 4 || !memory_access_is_direct(section->mr, true)) {
#if defined(TARGET_WORDS_BIGENDIAN)
if (endian == DEVICE_LITTLE_ENDIAN) {
val = bswap32(val);
val = bswap32(val);
}
#endif
- io_mem_write(section->mr, addr, val, 4);
+ io_mem_write(section->mr, addr1, val, 4);
} else {
- unsigned long addr1;
- addr1 = (memory_region_get_ram_addr(section->mr) & TARGET_PAGE_MASK)
- + memory_region_section_addr(section, addr);
/* RAM case */
+ addr1 += memory_region_get_ram_addr(section->mr) & TARGET_PAGE_MASK;
ptr = qemu_get_ram_ptr(addr1);
switch (endian) {
case DEVICE_LITTLE_ENDIAN:
{
uint8_t *ptr;
MemoryRegionSection *section;
+ hwaddr l = 2;
+ hwaddr addr1;
- section = phys_page_find(address_space_memory.dispatch, addr >> TARGET_PAGE_BITS);
-
- if (!memory_region_is_ram(section->mr) || section->readonly) {
- addr = memory_region_section_addr(section, addr);
- if (memory_region_is_ram(section->mr)) {
- section = &phys_sections[phys_section_rom];
- }
+ section = address_space_translate(&address_space_memory, addr, &addr1, &l,
+ true);
+ if (l < 2 || !memory_access_is_direct(section->mr, true)) {
#if defined(TARGET_WORDS_BIGENDIAN)
if (endian == DEVICE_LITTLE_ENDIAN) {
val = bswap16(val);
val = bswap16(val);
}
#endif
- io_mem_write(section->mr, addr, val, 2);
+ io_mem_write(section->mr, addr1, val, 2);
} else {
- unsigned long addr1;
- addr1 = (memory_region_get_ram_addr(section->mr) & TARGET_PAGE_MASK)
- + memory_region_section_addr(section, addr);
/* RAM case */
+ addr1 += memory_region_get_ram_addr(section->mr) & TARGET_PAGE_MASK;
ptr = qemu_get_ram_ptr(addr1);
switch (endian) {
case DEVICE_LITTLE_ENDIAN:
bool cpu_physical_memory_is_io(hwaddr phys_addr)
{
MemoryRegionSection *section;
+ hwaddr l = 1;
- section = phys_page_find(address_space_memory.dispatch,
- phys_addr >> TARGET_PAGE_BITS);
+ section = address_space_translate(&address_space_memory,
+ phys_addr, &phys_addr, &l, false);
return !(memory_region_is_ram(section->mr) ||
memory_region_is_romd(section->mr));
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