mirrors/yuzu
2
1
Fork 0
mirror of https://github.com/yuzu-emu/yuzu.git synced 2024-07-04 23:31:19 +01:00
Code Issues Releases Activity

Memory: ZeroBlock

Browse source
This commit is contained in:
MerryMage 2016-04-16 10:21:41 +01:00 committed by Subv
parent 2be17a0c6e
commit ca17df5757
2 changed files with 39 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

38
src/core/memory.cpp
View file

@ -457,6 +457,44 @@ void WriteBlock(const VAddr dest_addr, const u8* src_buffer, const size_t size)
}
}
void ZeroBlock(const VAddr dest_addr, const size_t size) {
size_t remaining_size = size;
size_t page_index = dest_addr >> PAGE_BITS;
size_t page_offset = dest_addr & PAGE_MASK;
while (remaining_size > 0) {
const size_t copy_amount = std::min(PAGE_SIZE - page_offset, remaining_size);
const VAddr current_vaddr = (page_index << PAGE_BITS) + page_offset;
switch (current_page_table->attributes[page_index]) {
case PageType::Unmapped: {
LOG_ERROR(HW_Memory, "unmapped ZeroBlock @ 0x%08X (start address = 0x%08X, size = %zu)", current_vaddr, dest_addr, size);
break;
}
case PageType::Memory: {
DEBUG_ASSERT(current_page_table->pointers[page_index]);
u8* dest_ptr = current_page_table->pointers[page_index] + page_offset;
std::memset(dest_ptr, 0, copy_amount);
break;
}
case PageType::Special: {
DEBUG_ASSERT(GetMMIOHandler(current_vaddr));
static const std::array<u8, PAGE_SIZE> zeros = {};
GetMMIOHandler(current_vaddr)->WriteBlock(current_vaddr, zeros.data(), copy_amount);
break;
}
default:
UNREACHABLE();
}
page_index++;
page_offset = 0;
remaining_size -= copy_amount;
}
}
template<>
u8 ReadMMIO<u8>(MMIORegionPointer mmio_handler, VAddr addr) {
return mmio_handler->Read8(addr);

1
src/core/memory.h
View file

@ -126,6 +126,7 @@ void Write32(VAddr addr, u32 data);
void Write64(VAddr addr, u64 data);
void WriteBlock(const VAddr dest_addr, const u8* src_buffer, size_t size);
void ZeroBlock(const VAddr dest_addr, const size_t size);
u8* GetPointer(VAddr virtual_address);