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LLE Mapped Buffer: addressed comments

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This commit is contained in:
NarcolepticK 2018-09-30 21:21:51 -04:00
parent 19291ba465
commit 51d53a6281
4 changed files with 140 additions and 76 deletions
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52
src/core/memory.cpp
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@ -700,6 +700,58 @@ void CopyBlock(VAddr dest_addr, VAddr src_addr, const std::size_t size) {
CopyBlock(*Kernel::g_current_process, dest_addr, src_addr, size);
}
void CopyBlock(const Kernel::Process& src_process, const Kernel::Process& dest_process,
VAddr src_addr, VAddr dest_addr, std::size_t size) {
auto& page_table = src_process.vm_manager.page_table;
std::size_t remaining_size = size;
std::size_t page_index = src_addr >> PAGE_BITS;
std::size_t page_offset = src_addr & PAGE_MASK;
while (remaining_size > 0) {
const std::size_t copy_amount = std::min(PAGE_SIZE - page_offset, remaining_size);
const VAddr current_vaddr = static_cast<VAddr>((page_index << PAGE_BITS) + page_offset);
switch (page_table.attributes[page_index]) {
case PageType::Unmapped: {
LOG_ERROR(HW_Memory,
"unmapped CopyBlock @ 0x{:08X} (start address = 0x{:08X}, size = {})",
current_vaddr, src_addr, size);
ZeroBlock(dest_process, dest_addr, copy_amount);
break;
}
case PageType::Memory: {
DEBUG_ASSERT(page_table.pointers[page_index]);
const u8* src_ptr = page_table.pointers[page_index] + page_offset;
WriteBlock(dest_process, dest_addr, src_ptr, copy_amount);
break;
}
case PageType::Special: {
MMIORegionPointer handler = GetMMIOHandler(page_table, current_vaddr);
DEBUG_ASSERT(handler);
std::vector<u8> buffer(copy_amount);
handler->ReadBlock(current_vaddr, buffer.data(), buffer.size());
WriteBlock(dest_process, dest_addr, buffer.data(), buffer.size());
break;
}
case PageType::RasterizerCachedMemory: {
RasterizerFlushVirtualRegion(current_vaddr, static_cast<u32>(copy_amount),
FlushMode::Flush);
WriteBlock(dest_process, dest_addr, GetPointerFromVMA(src_process, current_vaddr),
copy_amount);
break;
}
default:
UNREACHABLE();
}
page_index++;
page_offset = 0;
dest_addr += static_cast<VAddr>(copy_amount);
src_addr += static_cast<VAddr>(copy_amount);
remaining_size -= copy_amount;
}
}
template <>
u8 ReadMMIO<u8>(MMIORegionPointer mmio_handler, VAddr addr) {
return mmio_handler->Read8(addr);