diff options
Diffstat (limited to 'memory.c')
| -rw-r--r-- | memory.c | 67 |
1 files changed, 67 insertions, 0 deletions
@@ -1128,6 +1128,71 @@ const MemoryRegionOps unassigned_mem_ops = { .endianness = DEVICE_NATIVE_ENDIAN, }; +static uint64_t memory_region_ram_device_read(void *opaque, + hwaddr addr, unsigned size) +{ + MemoryRegion *mr = opaque; + uint64_t data = (uint64_t)~0; + + switch (size) { + case 1: + data = *(uint8_t *)(mr->ram_block->host + addr); + break; + case 2: + data = *(uint16_t *)(mr->ram_block->host + addr); + break; + case 4: + data = *(uint32_t *)(mr->ram_block->host + addr); + break; + case 8: + data = *(uint64_t *)(mr->ram_block->host + addr); + break; + } + + trace_memory_region_ram_device_read(get_cpu_index(), mr, addr, data, size); + + return data; +} + +static void memory_region_ram_device_write(void *opaque, hwaddr addr, + uint64_t data, unsigned size) +{ + MemoryRegion *mr = opaque; + + trace_memory_region_ram_device_write(get_cpu_index(), mr, addr, data, size); + + switch (size) { + case 1: + *(uint8_t *)(mr->ram_block->host + addr) = (uint8_t)data; + break; + case 2: + *(uint16_t *)(mr->ram_block->host + addr) = (uint16_t)data; + break; + case 4: + *(uint32_t *)(mr->ram_block->host + addr) = (uint32_t)data; + break; + case 8: + *(uint64_t *)(mr->ram_block->host + addr) = data; + break; + } +} + +static const MemoryRegionOps ram_device_mem_ops = { + .read = memory_region_ram_device_read, + .write = memory_region_ram_device_write, + .endianness = DEVICE_NATIVE_ENDIAN, + .valid = { + .min_access_size = 1, + .max_access_size = 8, + .unaligned = true, + }, + .impl = { + .min_access_size = 1, + .max_access_size = 8, + .unaligned = true, + }, +}; + bool memory_region_access_valid(MemoryRegion *mr, hwaddr addr, unsigned size, @@ -1363,6 +1428,8 @@ void memory_region_init_ram_device_ptr(MemoryRegion *mr, { memory_region_init_ram_ptr(mr, owner, name, size, ptr); mr->ram_device = true; + mr->ops = &ram_device_mem_ops; + mr->opaque = mr; } void memory_region_init_alias(MemoryRegion *mr, |