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memory: Make getter functions const qualified where applicable (#5251)

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Many of these functions are capable of being used within const contexts,
so we can apply the const qualifier in some cases and add const based
overloads for others, which makes the interface a little bit more
flexible and const-correct.
This commit is contained in:
Mat M 2020-04-28 15:43:52 -04:00 • committed by GitHub
parent 96832a2c82
commit 98fe5f82c5
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GPG key ID: 4AEE18F83AFDEB23
2 changed files with 44 additions and 15 deletions
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36
src/core/memory.cpp
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@ -266,7 +266,7 @@ void MemorySystem::UnmapRegion(PageTable& page_table, VAddr base, u32 size) {
MapPages(page_table, base / PAGE_SIZE, size / PAGE_SIZE, nullptr, PageType::Unmapped);
}
MemoryRef MemorySystem::GetPointerForRasterizerCache(VAddr addr) {
MemoryRef MemorySystem::GetPointerForRasterizerCache(VAddr addr) const {
if (addr >= LINEAR_HEAP_VADDR && addr < LINEAR_HEAP_VADDR_END) {
return {impl->fcram_mem, addr - LINEAR_HEAP_VADDR};
}
@ -394,7 +394,7 @@ bool IsValidVirtualAddress(const Kernel::Process& process, const VAddr vaddr) {
return false;
}
bool MemorySystem::IsValidPhysicalAddress(const PAddr paddr) {
bool MemorySystem::IsValidPhysicalAddress(const PAddr paddr) const {
return GetPhysicalPointer(paddr) != nullptr;
}
@ -414,6 +414,21 @@ u8* MemorySystem::GetPointer(const VAddr vaddr) {
return nullptr;
}
const u8* MemorySystem::GetPointer(const VAddr vaddr) const {
const u8* page_pointer = impl->current_page_table->pointers[vaddr >> PAGE_BITS];
if (page_pointer) {
return page_pointer + (vaddr & PAGE_MASK);
}
if (impl->current_page_table->attributes[vaddr >> PAGE_BITS] ==
PageType::RasterizerCachedMemory) {
return GetPointerForRasterizerCache(vaddr);
}
LOG_ERROR(HW_Memory, "unknown GetPointer @ 0x{:08x}", vaddr);
return nullptr;
}
std::string MemorySystem::ReadCString(VAddr vaddr, std::size_t max_length) {
std::string string;
string.reserve(max_length);
@ -432,7 +447,11 @@ u8* MemorySystem::GetPhysicalPointer(PAddr address) {
return GetPhysicalRef(address);
}
MemoryRef MemorySystem::GetPhysicalRef(PAddr address) {
const u8* MemorySystem::GetPhysicalPointer(PAddr address) const {
return GetPhysicalRef(address);
}
MemoryRef MemorySystem::GetPhysicalRef(PAddr address) const {
struct MemoryArea {
PAddr paddr_base;
u32 size;
@ -911,17 +930,22 @@ void WriteMMIO<u64>(MMIORegionPointer mmio_handler, VAddr addr, const u64 data)
mmio_handler->Write64(addr, data);
}
u32 MemorySystem::GetFCRAMOffset(const u8* pointer) {
u32 MemorySystem::GetFCRAMOffset(const u8* pointer) const {
ASSERT(pointer >= impl->fcram.get() && pointer <= impl->fcram.get() + Memory::FCRAM_N3DS_SIZE);
return static_cast<u32>(pointer - impl->fcram.get());
}
u8* MemorySystem::GetFCRAMPointer(u32 offset) {
u8* MemorySystem::GetFCRAMPointer(std::size_t offset) {
ASSERT(offset <= Memory::FCRAM_N3DS_SIZE);
return impl->fcram.get() + offset;
}
MemoryRef MemorySystem::GetFCRAMRef(u32 offset) {
const u8* MemorySystem::GetFCRAMPointer(std::size_t offset) const {
ASSERT(offset <= Memory::FCRAM_N3DS_SIZE);
return impl->fcram.get() + offset;
}
MemoryRef MemorySystem::GetFCRAMRef(std::size_t offset) const {
ASSERT(offset <= Memory::FCRAM_N3DS_SIZE);
return MemoryRef(impl->fcram_mem, offset);
}