112 lines
3.6 KiB
C++
112 lines
3.6 KiB
C++
/*
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* Copyright (c) 2017 - 2018, Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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#pragma once
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#include "runtime/helpers/basic_math.h"
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#include "runtime/memory_manager/physical_address_allocator.h"
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#include <array>
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#include <atomic>
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#include <cinttypes>
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#include <functional>
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#include <memory>
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#include <vector>
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namespace OCLRT {
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class GraphicsAllocation;
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class PageTableHelper {
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public:
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static uint32_t getMemoryBankIndex(GraphicsAllocation &allocation) {
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return memoryBankNotSpecified;
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}
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static const uint32_t memoryBankNotSpecified = 0;
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};
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typedef std::function<void(uint64_t addr, size_t size, size_t offset)> PageWalker;
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template <class T, uint32_t level, uint32_t bits = 9>
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class PageTable {
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public:
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PageTable(PhysicalAddressAllocator *physicalAddressAllocator) : allocator(physicalAddressAllocator) {
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entries.fill(nullptr);
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};
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virtual ~PageTable() {
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for (auto &e : entries)
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delete e;
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}
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virtual uintptr_t map(uintptr_t vm, size_t size, uint32_t memoryBank);
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virtual void pageWalk(uintptr_t vm, size_t size, size_t offset, PageWalker &pageWalker, uint32_t memoryBank);
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static const size_t pageSize = 1 << 12;
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static size_t getBits() {
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return T::getBits() + bits;
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}
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protected:
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std::array<T *, 1 << bits> entries;
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PhysicalAddressAllocator *allocator = nullptr;
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};
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template <>
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inline PageTable<void, 0, 9>::~PageTable() {
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}
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class PTE : public PageTable<void, 0u> {
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public:
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PTE(PhysicalAddressAllocator *physicalAddressAllocator) : PageTable<void, 0u>(physicalAddressAllocator) {}
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uintptr_t map(uintptr_t vm, size_t size, uint32_t memoryBank) override;
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void pageWalk(uintptr_t vm, size_t size, size_t offset, PageWalker &pageWalker, uint32_t memoryBank) override;
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static const uint32_t level = 0;
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static const uint32_t bits = 9;
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};
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class PDE : public PageTable<class PTE, 1> {
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public:
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PDE(PhysicalAddressAllocator *physicalAddressAllocator) : PageTable<class PTE, 1>(physicalAddressAllocator) {
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}
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};
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class PDP : public PageTable<class PDE, 2> {
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public:
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PDP(PhysicalAddressAllocator *physicalAddressAllocator) : PageTable<class PDE, 2>(physicalAddressAllocator) {
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}
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};
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class PML4 : public PageTable<class PDP, 3> {
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public:
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PML4(PhysicalAddressAllocator *physicalAddressAllocator) : PageTable<class PDP, 3>(physicalAddressAllocator) {
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}
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};
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class PDPE : public PageTable<class PDE, 2, 2> {
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public:
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PDPE(PhysicalAddressAllocator *physicalAddressAllocator) : PageTable<class PDE, 2, 2>(physicalAddressAllocator) {
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}
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};
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} // namespace OCLRT
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