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https://github.com/yuzu-mirror/yuzu
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51 lines
1.4 KiB
C++
51 lines
1.4 KiB
C++
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// Copyright 2020 yuzu Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#ifdef _WIN32
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#include <windows.h>
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#endif
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#include "common/assert.h"
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#include "core/core.h"
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#include "core/device_memory.h"
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#include "core/memory.h"
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namespace Core {
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constexpr u64 DramSize{4ULL * 1024 * 1024 * 1024};
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DeviceMemory::DeviceMemory(System& system) : system{system} {
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#ifdef _WIN32
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base = static_cast<u8*>(
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VirtualAlloc(nullptr, // System selects address
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DramSize, // Size of allocation
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MEM_RESERVE | MEM_COMMIT | MEM_WRITE_WATCH, // Allocate reserved pages
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PAGE_READWRITE)); // Protection = no access
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#else
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physical_memory.resize(DramSize);
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base = physical_memory.data();
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#endif
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}
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DeviceMemory::~DeviceMemory() {
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#ifdef _WIN32
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ASSERT(VirtualFree(base, DramSize, MEM_RELEASE));
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#endif
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}
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PAddr DeviceMemory::GetPhysicalAddr(VAddr addr) {
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u8* pointer{system.Memory().GetPointer(addr)};
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ASSERT(pointer);
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const uintptr_t offset{static_cast<uintptr_t>(pointer - GetPointer(DramMemoryMap::Base))};
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return DramMemoryMap::Base + offset;
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}
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u8* DeviceMemory::GetPointer(PAddr addr) {
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ASSERT(addr >= DramMemoryMap::Base);
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ASSERT(addr < DramMemoryMap::Base + DramSize);
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return base + (addr - DramMemoryMap::Base);
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}
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} // namespace Core
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