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Memory: ReadBlock/WriteBlock

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This commit is contained in:
MerryMage 2016-04-16 09:14:18 +01:00 • committed by Subv
parent c084fc824c
commit 3873b36db3
3 changed files with 81 additions and 4 deletions
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77
src/core/memory.cpp
View file

@ -364,6 +364,45 @@ u64 Read64(const VAddr addr) {
return Read<u64_le>(addr);
}
void ReadBlock(const VAddr src_addr, u8* dest_buffer, 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 ReadBlock @ 0x%08X (start address = 0x%08X, size = %zu)", current_vaddr, src_addr, size);
std::memset(dest_buffer, 0, 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;
std::memcpy(dest_buffer, src_ptr, copy_amount);
break;
}
case PageType::Special: {
DEBUG_ASSERT(GetMMIOHandler(current_vaddr));
GetMMIOHandler(current_vaddr)->ReadBlock(current_vaddr, dest_buffer, copy_amount);
break;
}
default:
UNREACHABLE();
}
page_index++;
page_offset = 0;
dest_buffer += copy_amount;
remaining_size -= copy_amount;
}
}
void Write8(const VAddr addr, const u8 data) {
Write<u8>(addr, data);
}
@ -380,9 +419,41 @@ void Write64(const VAddr addr, const u64 data) {
Write<u64_le>(addr, data);
}
void WriteBlock(const VAddr addr, const u8* data, const size_t size) {
for (u32 offset = 0; offset < size; offset++) {
Write8(addr + offset, data[offset]);
void WriteBlock(const VAddr dest_addr, const u8* src_buffer, 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 WriteBlock @ 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::memcpy(dest_ptr, src_buffer, copy_amount);
break;
}
case PageType::Special: {
DEBUG_ASSERT(GetMMIOHandler(current_vaddr));
GetMMIOHandler(current_vaddr)->WriteBlock(current_vaddr, src_buffer, copy_amount);
break;
}
default:
UNREACHABLE();
}
page_index++;
page_offset = 0;
src_buffer += copy_amount;
remaining_size -= copy_amount;
}
}

4
src/core/memory.h
View file

@ -118,12 +118,14 @@ 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 WriteBlock(VAddr addr, const u8* data, size_t size);
void WriteBlock(const VAddr dest_addr, const u8* src_buffer, size_t size);
u8* GetPointer(VAddr virtual_address);

4
src/core/mmio.h
View file

@ -25,10 +25,14 @@ public:
virtual u32 Read32(VAddr addr) = 0;
virtual u64 Read64(VAddr addr) = 0;
virtual bool ReadBlock(VAddr src_addr, u8* dest_buffer, size_t size) = 0;
virtual void Write8(VAddr addr, u8 data) = 0;
virtual void Write16(VAddr addr, u16 data) = 0;
virtual void Write32(VAddr addr, u32 data) = 0;
virtual void Write64(VAddr addr, u64 data) = 0;
virtual bool WriteBlock(VAddr dest_addr, const u8* src_buffer, size_t size) = 0;
};
using MMIORegionPointer = std::shared_ptr<MMIORegion>;