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-rw-r--r--src/common/CMakeLists.txt2
-rw-r--r--src/common/multi_level_page_table.cpp7
-rw-r--r--src/common/multi_level_page_table.h79
-rw-r--r--src/common/multi_level_page_table.inc83
4 files changed, 171 insertions, 0 deletions
diff --git a/src/common/CMakeLists.txt b/src/common/CMakeLists.txt
index 3447fabd8..2db414819 100644
--- a/src/common/CMakeLists.txt
+++ b/src/common/CMakeLists.txt
@@ -81,6 +81,8 @@ add_library(common STATIC
microprofile.cpp
microprofile.h
microprofileui.h
+ multi_level_page_table.cpp
+ multi_level_page_table.h
nvidia_flags.cpp
nvidia_flags.h
page_table.cpp
diff --git a/src/common/multi_level_page_table.cpp b/src/common/multi_level_page_table.cpp
new file mode 100644
index 000000000..561785ca7
--- /dev/null
+++ b/src/common/multi_level_page_table.cpp
@@ -0,0 +1,7 @@
+#include "common/multi_level_page_table.inc"
+
+namespace Common {
+template class Common::MultiLevelPageTable<GPUVAddr>;
+template class Common::MultiLevelPageTable<VAddr>;
+template class Common::MultiLevelPageTable<PAddr>;
+} // namespace Common
diff --git a/src/common/multi_level_page_table.h b/src/common/multi_level_page_table.h
new file mode 100644
index 000000000..dde1cc962
--- /dev/null
+++ b/src/common/multi_level_page_table.h
@@ -0,0 +1,79 @@
+// Copyright 2021 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <type_traits>
+#include <utility>
+#include <vector>
+
+#include "common/common_types.h"
+
+namespace Common {
+
+template <typename BaseAddr>
+class MultiLevelPageTable final {
+public:
+ constexpr MultiLevelPageTable() = default;
+ explicit MultiLevelPageTable(std::size_t address_space_bits, std::size_t first_level_bits,
+ std::size_t page_bits);
+
+ ~MultiLevelPageTable() noexcept;
+
+ MultiLevelPageTable(const MultiLevelPageTable&) = delete;
+ MultiLevelPageTable& operator=(const MultiLevelPageTable&) = delete;
+
+ MultiLevelPageTable(MultiLevelPageTable&& other) noexcept
+ : address_space_bits{std::exchange(other.address_space_bits, 0)},
+ first_level_bits{std::exchange(other.first_level_bits, 0)}, page_bits{std::exchange(
+ other.page_bits, 0)},
+ first_level_shift{std::exchange(other.first_level_shift, 0)},
+ first_level_chunk_size{std::exchange(other.first_level_chunk_size, 0)},
+ first_level_map{std::move(other.first_level_map)}, base_ptr{std::exchange(other.base_ptr,
+ nullptr)} {}
+
+ MultiLevelPageTable& operator=(MultiLevelPageTable&& other) noexcept {
+ address_space_bits = std::exchange(other.address_space_bits, 0);
+ first_level_bits = std::exchange(other.first_level_bits, 0);
+ page_bits = std::exchange(other.page_bits, 0);
+ first_level_shift = std::exchange(other.first_level_shift, 0);
+ first_level_chunk_size = std::exchange(other.first_level_chunk_size, 0);
+ alloc_size = std::exchange(other.alloc_size, 0);
+ first_level_map = std::move(other.first_level_map);
+ base_ptr = std::exchange(other.base_ptr, nullptr);
+ return *this;
+ }
+
+ void ReserveRange(u64 start, std::size_t size);
+
+ [[nodiscard]] constexpr const BaseAddr& operator[](std::size_t index) const {
+ return base_ptr[index];
+ }
+
+ [[nodiscard]] constexpr BaseAddr& operator[](std::size_t index) {
+ return base_ptr[index];
+ }
+
+ [[nodiscard]] constexpr BaseAddr* data() {
+ return base_ptr;
+ }
+
+ [[nodiscard]] constexpr const BaseAddr* data() const {
+ return base_ptr;
+ }
+
+private:
+ void AllocateLevel(u64 level);
+
+ std::size_t address_space_bits{};
+ std::size_t first_level_bits{};
+ std::size_t page_bits{};
+ std::size_t first_level_shift{};
+ std::size_t first_level_chunk_size{};
+ std::size_t alloc_size{};
+ std::vector<void*> first_level_map{};
+ BaseAddr* base_ptr{};
+};
+
+} // namespace Common
diff --git a/src/common/multi_level_page_table.inc b/src/common/multi_level_page_table.inc
new file mode 100644
index 000000000..a75e61f9d
--- /dev/null
+++ b/src/common/multi_level_page_table.inc
@@ -0,0 +1,83 @@
+// Copyright 2021 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#ifdef _WIN32
+#include <windows.h>
+#else
+#include <sys/mman.h>
+#endif
+
+#include "common/assert.h"
+#include "common/multi_level_page_table.h"
+
+namespace Common {
+
+template <typename BaseAddr>
+MultiLevelPageTable<BaseAddr>::MultiLevelPageTable(std::size_t address_space_bits_,
+ std::size_t first_level_bits_,
+ std::size_t page_bits_)
+ : address_space_bits{address_space_bits_},
+ first_level_bits{first_level_bits_}, page_bits{page_bits_} {
+ first_level_shift = address_space_bits - first_level_bits;
+ first_level_chunk_size = 1ULL << (first_level_shift - page_bits);
+ alloc_size = (1ULL << (address_space_bits - page_bits)) * sizeof(BaseAddr);
+ std::size_t first_level_size = 1ULL << first_level_bits;
+ first_level_map.resize(first_level_size, nullptr);
+#ifdef _WIN32
+ void* base{VirtualAlloc(nullptr, alloc_size, MEM_RESERVE, PAGE_READWRITE)};
+#else
+ void* base{mmap(nullptr, alloc_size, PROT_NONE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0)};
+
+ if (base == MAP_FAILED) {
+ base = nullptr;
+ }
+#endif
+
+ ASSERT(base);
+ base_ptr = reinterpret_cast<BaseAddr*>(base);
+}
+
+template <typename BaseAddr>
+MultiLevelPageTable<BaseAddr>::~MultiLevelPageTable() noexcept {
+ if (!base_ptr) {
+ return;
+ }
+#ifdef _WIN32
+ ASSERT(VirtualFree(base_ptr, 0, MEM_RELEASE));
+#else
+ ASSERT(munmap(base_ptr, alloc_size) == 0);
+#endif
+}
+
+template <typename BaseAddr>
+void MultiLevelPageTable<BaseAddr>::ReserveRange(u64 start, std::size_t size) {
+ const u64 new_start = start >> first_level_shift;
+ const u64 new_end =
+ (start + size + (first_level_chunk_size << page_bits) - 1) >> first_level_shift;
+ for (u64 i = new_start; i <= new_end; i++) {
+ if (!first_level_map[i]) {
+ AllocateLevel(i);
+ }
+ }
+}
+
+template <typename BaseAddr>
+void MultiLevelPageTable<BaseAddr>::AllocateLevel(u64 level) {
+ void* ptr = reinterpret_cast<char*>(base_ptr) + level * first_level_chunk_size;
+#ifdef _WIN32
+ void* base{VirtualAlloc(ptr, first_level_chunk_size, MEM_COMMIT, PAGE_READWRITE)};
+#else
+ void* base{mmap(ptr, first_level_chunk_size, PROT_READ | PROT_WRITE,
+ MAP_ANONYMOUS | MAP_PRIVATE, -1, 0)};
+
+ if (base == MAP_FAILED) {
+ base = nullptr;
+ }
+#endif
+ ASSERT(base);
+
+ first_level_map[level] = base;
+}
+
+} // namespace Common
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