diff options
| author | bunnei <bunneidev@gmail.com> | 2020-04-02 22:00:41 -0400 |
|---|---|---|
| committer | bunnei <bunneidev@gmail.com> | 2020-04-17 00:59:29 -0400 |
| commit | dc25c86556c36dd23224d88234afc9ecbf780719 (patch) | |
| tree | 5dbe45bcc17ecad8675e7a4cb03dd34361f01e03 /src/core/device_memory.cpp | |
| parent | f1b607829e3b93aed117467c1e119514a61074da (diff) | |
core: device_manager: Add a simple class to manage device RAM.
Diffstat (limited to 'src/core/device_memory.cpp')
| -rw-r--r-- | src/core/device_memory.cpp | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/src/core/device_memory.cpp b/src/core/device_memory.cpp new file mode 100644 index 0000000000..1e41875463 --- /dev/null +++ b/src/core/device_memory.cpp @@ -0,0 +1,50 @@ +// Copyright 2020 yuzu Emulator Project +// Licensed under GPLv2 or any later version +// Refer to the license.txt file included. + +#ifdef _WIN32 +#include <windows.h> +#endif + +#include "common/assert.h" +#include "core/core.h" +#include "core/device_memory.h" +#include "core/memory.h" + +namespace Core { + +constexpr u64 DramSize{4ULL * 1024 * 1024 * 1024}; + +DeviceMemory::DeviceMemory(System& system) : system{system} { +#ifdef _WIN32 + base = static_cast<u8*>( + VirtualAlloc(nullptr, // System selects address + DramSize, // Size of allocation + MEM_RESERVE | MEM_COMMIT | MEM_WRITE_WATCH, // Allocate reserved pages + PAGE_READWRITE)); // Protection = no access +#else + physical_memory.resize(DramSize); + base = physical_memory.data(); +#endif +} + +DeviceMemory::~DeviceMemory() { +#ifdef _WIN32 + ASSERT(VirtualFree(base, DramSize, MEM_RELEASE)); +#endif +} + +PAddr DeviceMemory::GetPhysicalAddr(VAddr addr) { + u8* pointer{system.Memory().GetPointer(addr)}; + ASSERT(pointer); + const uintptr_t offset{static_cast<uintptr_t>(pointer - GetPointer(DramMemoryMap::Base))}; + return DramMemoryMap::Base + offset; +} + +u8* DeviceMemory::GetPointer(PAddr addr) { + ASSERT(addr >= DramMemoryMap::Base); + ASSERT(addr < DramMemoryMap::Base + DramSize); + return base + (addr - DramMemoryMap::Base); +} + +} // namespace Core |