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Memory: CopyBlock

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MerryMage 2016-04-16 15:22:45 +01:00 • committed by Subv
parent e0ee10c3e9
commit c3ad268edc
2 changed files with 43 additions and 2 deletions
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41
src/core/memory.cpp
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@ -495,6 +495,47 @@ void ZeroBlock(const VAddr dest_addr, const size_t size) {
}
}
void CopyBlock(VAddr dest_addr, VAddr src_addr, const size_t size) {
size_t remaining_size = size;
size_t page_index = src_addr >> PAGE_BITS;
size_t page_offset = src_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 CopyBlock @ 0x%08X (start address = 0x%08X, size = %zu)", current_vaddr, src_addr, size);
ZeroBlock(dest_addr, copy_amount);
break;
}
case PageType::Memory: {
DEBUG_ASSERT(current_page_table->pointers[page_index]);
const u8* src_ptr = current_page_table->pointers[page_index] + page_offset;
WriteBlock(dest_addr, src_ptr, copy_amount);
break;
}
case PageType::Special: {
DEBUG_ASSERT(GetMMIOHandler(current_vaddr));
std::vector<u8> buffer(copy_amount);
GetMMIOHandler(current_vaddr)->ReadBlock(current_vaddr, buffer.data(), buffer.size());
WriteBlock(dest_addr, buffer.data(), buffer.size());
break;
}
default:
UNREACHABLE();
}
page_index++;
page_offset = 0;
dest_addr += copy_amount;
src_addr += copy_amount;
remaining_size -= copy_amount;
}
}
template<>
u8 ReadMMIO<u8>(MMIORegionPointer mmio_handler, VAddr addr) {
return mmio_handler->Read8(addr);

4
src/core/memory.h
View file

@ -118,15 +118,15 @@ u16 Read16(VAddr addr);
u32 Read32(VAddr addr);
u64 Read64(VAddr addr);
void ReadBlock(const VAddr src_addr, u8* dest_buffer, size_t size);
void Write8(VAddr addr, u8 data);
void Write16(VAddr addr, u16 data);
void Write32(VAddr addr, u32 data);
void Write64(VAddr addr, u64 data);
void ReadBlock(const VAddr src_addr, u8* dest_buffer, size_t size);
void WriteBlock(const VAddr dest_addr, const u8* src_buffer, size_t size);
void ZeroBlock(const VAddr dest_addr, const size_t size);
void CopyBlock(VAddr dest_addr, VAddr src_addr, size_t size);
u8* GetPointer(VAddr virtual_address);