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-rw-r--r--src/core/CMakeLists.txt2
-rw-r--r--src/core/hle/service/nvdrv/memory_manager.cpp112
-rw-r--r--src/core/hle/service/nvdrv/memory_manager.h48
3 files changed, 162 insertions, 0 deletions
diff --git a/src/core/CMakeLists.txt b/src/core/CMakeLists.txt
index 02c178441..eab08207d 100644
--- a/src/core/CMakeLists.txt
+++ b/src/core/CMakeLists.txt
@@ -137,6 +137,8 @@ add_library(core STATIC
hle/service/nvdrv/devices/nvmap.h
hle/service/nvdrv/interface.cpp
hle/service/nvdrv/interface.h
+ hle/service/nvdrv/memory_manager.cpp
+ hle/service/nvdrv/memory_manager.h
hle/service/nvdrv/nvdrv.cpp
hle/service/nvdrv/nvdrv.h
hle/service/nvdrv/nvmemp.cpp
diff --git a/src/core/hle/service/nvdrv/memory_manager.cpp b/src/core/hle/service/nvdrv/memory_manager.cpp
new file mode 100644
index 000000000..55a8675d5
--- /dev/null
+++ b/src/core/hle/service/nvdrv/memory_manager.cpp
@@ -0,0 +1,112 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "common/assert.h"
+#include "core/hle/service/nvdrv/memory_manager.h"
+
+namespace Service {
+namespace Nvidia {
+
+PAddr MemoryManager::AllocateSpace(u64 size, u64 align) {
+ boost::optional<PAddr> paddr = FindFreeBlock(size, align);
+ ASSERT(paddr);
+
+ for (u64 offset = 0; offset < size; offset += Memory::PAGE_SIZE) {
+ PageSlot(*paddr + offset) = static_cast<u64>(PageStatus::Allocated);
+ }
+
+ return *paddr;
+}
+
+PAddr MemoryManager::AllocateSpace(PAddr paddr, u64 size, u64 align) {
+ for (u64 offset = 0; offset < size; offset += Memory::PAGE_SIZE) {
+ if (IsPageMapped(paddr + offset)) {
+ return AllocateSpace(size, align);
+ }
+ }
+
+ for (u64 offset = 0; offset < size; offset += Memory::PAGE_SIZE) {
+ PageSlot(paddr + offset) = static_cast<u64>(PageStatus::Allocated);
+ }
+
+ return paddr;
+}
+
+PAddr MemoryManager::MapBufferEx(VAddr vaddr, u64 size) {
+ vaddr &= ~Memory::PAGE_MASK;
+
+ boost::optional<PAddr> paddr = FindFreeBlock(size);
+ ASSERT(paddr);
+
+ for (u64 offset = 0; offset < size; offset += Memory::PAGE_SIZE) {
+ PageSlot(*paddr + offset) = vaddr + offset;
+ }
+
+ return *paddr;
+}
+
+PAddr MemoryManager::MapBufferEx(VAddr vaddr, PAddr paddr, u64 size) {
+ vaddr &= ~Memory::PAGE_MASK;
+ paddr &= ~Memory::PAGE_MASK;
+
+ for (u64 offset = 0; offset < size; offset += Memory::PAGE_SIZE) {
+ if (PageSlot(paddr + offset) != static_cast<u64>(PageStatus::Allocated)) {
+ return MapBufferEx(vaddr, size);
+ }
+ }
+
+ for (u64 offset = 0; offset < size; offset += Memory::PAGE_SIZE) {
+ PageSlot(paddr + offset) = vaddr + offset;
+ }
+
+ return paddr;
+}
+
+boost::optional<PAddr> MemoryManager::FindFreeBlock(u64 size, u64 align) {
+ PAddr paddr{};
+ u64 free_space{};
+ align = (align + Memory::PAGE_MASK) & ~Memory::PAGE_MASK;
+
+ while (paddr + free_space < MAX_ADDRESS) {
+ if (!IsPageMapped(paddr + free_space)) {
+ free_space += Memory::PAGE_SIZE;
+ if (free_space >= size) {
+ return paddr;
+ }
+ } else {
+ paddr += free_space + Memory::PAGE_SIZE;
+ free_space = 0;
+ const u64 remainder{paddr % align};
+ if (!remainder) {
+ paddr = (paddr - remainder) + align;
+ }
+ }
+ }
+
+ return {};
+}
+
+VAddr MemoryManager::PhysicalToVirtualAddress(PAddr paddr) {
+ VAddr base_addr = PageSlot(paddr);
+ ASSERT(base_addr != static_cast<u64>(PageStatus::Unmapped));
+ return base_addr + (paddr & Memory::PAGE_MASK);
+}
+
+bool MemoryManager::IsPageMapped(PAddr paddr) {
+ return PageSlot(paddr) != static_cast<u64>(PageStatus::Unmapped);
+}
+
+VAddr& MemoryManager::PageSlot(PAddr paddr) {
+ auto& block = page_table[(paddr >> (Memory::PAGE_BITS + PAGE_TABLE_BITS)) & PAGE_TABLE_MASK];
+ if (!block) {
+ block = std::make_unique<PageBlock>();
+ for (unsigned index = 0; index < PAGE_BLOCK_SIZE; index++) {
+ (*block)[index] = static_cast<u64>(PageStatus::Unmapped);
+ }
+ }
+ return (*block)[(paddr >> Memory::PAGE_BITS) & PAGE_BLOCK_MASK];
+}
+
+} // namespace Nvidia
+} // namespace Service
diff --git a/src/core/hle/service/nvdrv/memory_manager.h b/src/core/hle/service/nvdrv/memory_manager.h
new file mode 100644
index 000000000..4ba1a3952
--- /dev/null
+++ b/src/core/hle/service/nvdrv/memory_manager.h
@@ -0,0 +1,48 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <array>
+#include <memory>
+#include "common/common_types.h"
+#include "core/memory.h"
+
+namespace Service {
+namespace Nvidia {
+
+class MemoryManager final {
+public:
+ MemoryManager() = default;
+
+ PAddr AllocateSpace(u64 size, u64 align);
+ PAddr AllocateSpace(PAddr paddr, u64 size, u64 align);
+ PAddr MapBufferEx(VAddr vaddr, u64 size);
+ PAddr MapBufferEx(VAddr vaddr, PAddr paddr, u64 size);
+ VAddr PhysicalToVirtualAddress(PAddr paddr);
+
+private:
+ boost::optional<PAddr> FindFreeBlock(u64 size, u64 align = 1);
+ bool IsPageMapped(PAddr paddr);
+ VAddr& PageSlot(PAddr paddr);
+
+ enum class PageStatus : u64 {
+ Unmapped = 0xFFFFFFFFFFFFFFFFULL,
+ Allocated = 0xFFFFFFFFFFFFFFFEULL,
+ };
+
+ static constexpr u64 MAX_ADDRESS{0x10000000000ULL};
+ static constexpr u64 PAGE_TABLE_BITS{14};
+ static constexpr u64 PAGE_TABLE_SIZE{1 << PAGE_TABLE_BITS};
+ static constexpr u64 PAGE_TABLE_MASK{PAGE_TABLE_SIZE - 1};
+ static constexpr u64 PAGE_BLOCK_BITS{14};
+ static constexpr u64 PAGE_BLOCK_SIZE{1 << PAGE_BLOCK_BITS};
+ static constexpr u64 PAGE_BLOCK_MASK{PAGE_BLOCK_SIZE - 1};
+
+ using PageBlock = std::array<VAddr, PAGE_BLOCK_SIZE>;
+ std::array<std::unique_ptr<PageBlock>, PAGE_TABLE_SIZE> page_table{};
+};
+
+} // namespace Nvidia
+} // namespace Service
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