core/memory: Move memory read/write implementation functions into an anonymous namespace
These will eventually be migrated into the main Memory class, but for now, we put them in an anonymous namespace, so that the other functions that use them, can be migrated over separately.
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Lioncash
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@ -20,8 +20,105 @@
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#include "video_core/gpu.h"
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namespace Memory {
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namespace {
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Common::PageTable* current_page_table = nullptr;
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static Common::PageTable* current_page_table = nullptr;
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/**
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* Gets a pointer to the exact memory at the virtual address (i.e. not page aligned)
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* using a VMA from the current process
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*/
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u8* GetPointerFromVMA(const Kernel::Process& process, VAddr vaddr) {
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const auto& vm_manager = process.VMManager();
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const auto it = vm_manager.FindVMA(vaddr);
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DEBUG_ASSERT(vm_manager.IsValidHandle(it));
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u8* direct_pointer = nullptr;
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const auto& vma = it->second;
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switch (vma.type) {
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case Kernel::VMAType::AllocatedMemoryBlock:
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direct_pointer = vma.backing_block->data() + vma.offset;
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break;
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case Kernel::VMAType::BackingMemory:
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direct_pointer = vma.backing_memory;
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break;
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case Kernel::VMAType::Free:
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return nullptr;
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default:
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UNREACHABLE();
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}
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return direct_pointer + (vaddr - vma.base);
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}
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/**
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* Gets a pointer to the exact memory at the virtual address (i.e. not page aligned)
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* using a VMA from the current process.
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*/
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u8* GetPointerFromVMA(VAddr vaddr) {
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return ::Memory::GetPointerFromVMA(*Core::System::GetInstance().CurrentProcess(), vaddr);
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}
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template <typename T>
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T Read(const VAddr vaddr) {
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const u8* const page_pointer = current_page_table->pointers[vaddr >> PAGE_BITS];
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if (page_pointer != nullptr) {
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// NOTE: Avoid adding any extra logic to this fast-path block
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T value;
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std::memcpy(&value, &page_pointer[vaddr & PAGE_MASK], sizeof(T));
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return value;
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}
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const Common::PageType type = current_page_table->attributes[vaddr >> PAGE_BITS];
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switch (type) {
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case Common::PageType::Unmapped:
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LOG_ERROR(HW_Memory, "Unmapped Read{} @ 0x{:08X}", sizeof(T) * 8, vaddr);
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return 0;
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case Common::PageType::Memory:
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ASSERT_MSG(false, "Mapped memory page without a pointer @ {:016X}", vaddr);
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break;
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case Common::PageType::RasterizerCachedMemory: {
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const u8* const host_ptr{GetPointerFromVMA(vaddr)};
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Core::System::GetInstance().GPU().FlushRegion(ToCacheAddr(host_ptr), sizeof(T));
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T value;
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std::memcpy(&value, host_ptr, sizeof(T));
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return value;
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}
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default:
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UNREACHABLE();
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}
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return {};
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}
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template <typename T>
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void Write(const VAddr vaddr, const T data) {
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u8* const page_pointer = current_page_table->pointers[vaddr >> PAGE_BITS];
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if (page_pointer != nullptr) {
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// NOTE: Avoid adding any extra logic to this fast-path block
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std::memcpy(&page_pointer[vaddr & PAGE_MASK], &data, sizeof(T));
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return;
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}
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Common::PageType type = current_page_table->attributes[vaddr >> PAGE_BITS];
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switch (type) {
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case Common::PageType::Unmapped:
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LOG_ERROR(HW_Memory, "Unmapped Write{} 0x{:08X} @ 0x{:016X}", sizeof(data) * 8,
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static_cast<u32>(data), vaddr);
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return;
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case Common::PageType::Memory:
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ASSERT_MSG(false, "Mapped memory page without a pointer @ {:016X}", vaddr);
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break;
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case Common::PageType::RasterizerCachedMemory: {
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u8* const host_ptr{GetPointerFromVMA(vaddr)};
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Core::System::GetInstance().GPU().InvalidateRegion(ToCacheAddr(host_ptr), sizeof(T));
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std::memcpy(host_ptr, &data, sizeof(T));
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break;
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}
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default:
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UNREACHABLE();
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}
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}
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} // Anonymous namespace
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// Implementation class used to keep the specifics of the memory subsystem hidden
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// from outside classes. This also allows modification to the internals of the memory
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@ -191,102 +288,6 @@ void SetCurrentPageTable(Kernel::Process& process) {
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system.ArmInterface(3).PageTableChanged(*current_page_table, address_space_width);
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}
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/**
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* Gets a pointer to the exact memory at the virtual address (i.e. not page aligned)
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* using a VMA from the current process
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*/
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static u8* GetPointerFromVMA(const Kernel::Process& process, VAddr vaddr) {
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const auto& vm_manager = process.VMManager();
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const auto it = vm_manager.FindVMA(vaddr);
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DEBUG_ASSERT(vm_manager.IsValidHandle(it));
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u8* direct_pointer = nullptr;
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const auto& vma = it->second;
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switch (vma.type) {
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case Kernel::VMAType::AllocatedMemoryBlock:
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direct_pointer = vma.backing_block->data() + vma.offset;
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break;
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case Kernel::VMAType::BackingMemory:
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direct_pointer = vma.backing_memory;
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break;
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case Kernel::VMAType::Free:
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return nullptr;
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default:
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UNREACHABLE();
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}
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return direct_pointer + (vaddr - vma.base);
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}
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/**
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* Gets a pointer to the exact memory at the virtual address (i.e. not page aligned)
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* using a VMA from the current process.
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*/
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static u8* GetPointerFromVMA(VAddr vaddr) {
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return GetPointerFromVMA(*Core::System::GetInstance().CurrentProcess(), vaddr);
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}
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template <typename T>
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T Read(const VAddr vaddr) {
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const u8* page_pointer = current_page_table->pointers[vaddr >> PAGE_BITS];
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if (page_pointer) {
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// NOTE: Avoid adding any extra logic to this fast-path block
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T value;
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std::memcpy(&value, &page_pointer[vaddr & PAGE_MASK], sizeof(T));
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return value;
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}
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Common::PageType type = current_page_table->attributes[vaddr >> PAGE_BITS];
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switch (type) {
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case Common::PageType::Unmapped:
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LOG_ERROR(HW_Memory, "Unmapped Read{} @ 0x{:08X}", sizeof(T) * 8, vaddr);
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return 0;
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case Common::PageType::Memory:
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ASSERT_MSG(false, "Mapped memory page without a pointer @ {:016X}", vaddr);
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break;
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case Common::PageType::RasterizerCachedMemory: {
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auto host_ptr{GetPointerFromVMA(vaddr)};
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Core::System::GetInstance().GPU().FlushRegion(ToCacheAddr(host_ptr), sizeof(T));
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T value;
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std::memcpy(&value, host_ptr, sizeof(T));
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return value;
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}
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default:
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UNREACHABLE();
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}
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return {};
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}
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template <typename T>
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void Write(const VAddr vaddr, const T data) {
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u8* page_pointer = current_page_table->pointers[vaddr >> PAGE_BITS];
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if (page_pointer) {
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// NOTE: Avoid adding any extra logic to this fast-path block
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std::memcpy(&page_pointer[vaddr & PAGE_MASK], &data, sizeof(T));
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return;
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}
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Common::PageType type = current_page_table->attributes[vaddr >> PAGE_BITS];
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switch (type) {
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case Common::PageType::Unmapped:
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LOG_ERROR(HW_Memory, "Unmapped Write{} 0x{:08X} @ 0x{:016X}", sizeof(data) * 8,
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static_cast<u32>(data), vaddr);
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return;
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case Common::PageType::Memory:
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ASSERT_MSG(false, "Mapped memory page without a pointer @ {:016X}", vaddr);
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break;
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case Common::PageType::RasterizerCachedMemory: {
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auto host_ptr{GetPointerFromVMA(vaddr)};
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Core::System::GetInstance().GPU().InvalidateRegion(ToCacheAddr(host_ptr), sizeof(T));
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std::memcpy(host_ptr, &data, sizeof(T));
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break;
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}
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default:
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UNREACHABLE();
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}
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}
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bool IsKernelVirtualAddress(const VAddr vaddr) {
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return KERNEL_REGION_VADDR <= vaddr && vaddr < KERNEL_REGION_END;
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}
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