diff options
Diffstat (limited to 'exec.c')
| -rw-r--r-- | exec.c | 37 |
1 files changed, 22 insertions, 15 deletions
@@ -1288,15 +1288,7 @@ void qemu_ram_remap(ram_addr_t addr, ram_addr_t length) } #endif /* !_WIN32 */ -/* Return a host pointer to ram allocated with qemu_ram_alloc. - With the exception of the softmmu code in this file, this should - only be used for local memory (e.g. video ram) that the device owns, - and knows it isn't going to access beyond the end of the block. - - It should not be used for general purpose DMA. - Use cpu_physical_memory_map/cpu_physical_memory_rw instead. - */ -void *qemu_get_ram_ptr(ram_addr_t addr) +static RAMBlock *qemu_get_ram_block(ram_addr_t addr) { RAMBlock *block; @@ -1316,6 +1308,21 @@ void *qemu_get_ram_ptr(ram_addr_t addr) found: ram_list.mru_block = block; + return block; +} + +/* Return a host pointer to ram allocated with qemu_ram_alloc. + With the exception of the softmmu code in this file, this should + only be used for local memory (e.g. video ram) that the device owns, + and knows it isn't going to access beyond the end of the block. + + It should not be used for general purpose DMA. + Use cpu_physical_memory_map/cpu_physical_memory_rw instead. + */ +void *qemu_get_ram_ptr(ram_addr_t addr) +{ + RAMBlock *block = qemu_get_ram_block(addr); + if (xen_enabled()) { /* We need to check if the requested address is in the RAM * because we don't want to map the entire memory in QEMU. @@ -1392,14 +1399,14 @@ static void *qemu_ram_ptr_length(ram_addr_t addr, ram_addr_t *size) /* Some of the softmmu routines need to translate from a host pointer (typically a TLB entry) back to a ram offset. */ -int qemu_ram_addr_from_host(void *ptr, ram_addr_t *ram_addr) +MemoryRegion *qemu_ram_addr_from_host(void *ptr, ram_addr_t *ram_addr) { RAMBlock *block; uint8_t *host = ptr; if (xen_enabled()) { *ram_addr = xen_ram_addr_from_mapcache(ptr); - return 0; + return qemu_get_ram_block(*ram_addr)->mr; } block = ram_list.mru_block; @@ -1417,11 +1424,11 @@ int qemu_ram_addr_from_host(void *ptr, ram_addr_t *ram_addr) } } - return -1; + return NULL; found: *ram_addr = block->offset + (host - block->host); - return 0; + return block->mr; } static void notdirty_mem_write(void *opaque, hwaddr ram_addr, @@ -2111,8 +2118,8 @@ void address_space_unmap(AddressSpace *as, void *buffer, hwaddr len, if (buffer != bounce.buffer) { if (is_write) { ram_addr_t addr1; - int rc = qemu_ram_addr_from_host(buffer, &addr1); - assert(rc == 0); + MemoryRegion *mr = qemu_ram_addr_from_host(buffer, &addr1); + assert(mr != NULL); while (access_len) { unsigned l; l = TARGET_PAGE_SIZE; |