diff options
Diffstat (limited to 'exec.c')
| -rw-r--r-- | exec.c | 44 |
1 files changed, 39 insertions, 5 deletions
@@ -50,6 +50,7 @@ #include "translate-all.h" #include "exec/memory-internal.h" +#include "qemu/cache-utils.h" //#define DEBUG_SUBPAGE @@ -2010,9 +2011,13 @@ void cpu_physical_memory_rw(hwaddr addr, uint8_t *buf, 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) +enum write_rom_type { + WRITE_DATA, + FLUSH_CACHE, +}; + +static inline void cpu_physical_memory_write_rom_internal( + hwaddr addr, const uint8_t *buf, int len, enum write_rom_type type) { hwaddr l; uint8_t *ptr; @@ -2031,8 +2036,15 @@ void cpu_physical_memory_write_rom(hwaddr addr, addr1 += memory_region_get_ram_addr(mr); /* ROM/RAM case */ ptr = qemu_get_ram_ptr(addr1); - memcpy(ptr, buf, l); - invalidate_and_set_dirty(addr1, l); + switch (type) { + case WRITE_DATA: + memcpy(ptr, buf, l); + invalidate_and_set_dirty(addr1, l); + break; + case FLUSH_CACHE: + flush_icache_range((uintptr_t)ptr, (uintptr_t)ptr + l); + break; + } } len -= l; buf += l; @@ -2040,6 +2052,28 @@ void cpu_physical_memory_write_rom(hwaddr addr, } } +/* used for ROM loading : can write in RAM and ROM */ +void cpu_physical_memory_write_rom(hwaddr addr, + const uint8_t *buf, int len) +{ + cpu_physical_memory_write_rom_internal(addr, buf, len, WRITE_DATA); +} + +void cpu_flush_icache_range(hwaddr start, int len) +{ + /* + * This function should do the same thing as an icache flush that was + * triggered from within the guest. For TCG we are always cache coherent, + * so there is no need to flush anything. For KVM / Xen we need to flush + * the host's instruction cache at least. + */ + if (tcg_enabled()) { + return; + } + + cpu_physical_memory_write_rom_internal(start, NULL, len, FLUSH_CACHE); +} + typedef struct { MemoryRegion *mr; void *buffer; |