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/*
* Copyright (C) 2018-2023 Intel Corporation
*
* SPDX-License-Identifier: MIT
*
*/
#pragma once
#include "shared/source/memory_manager/physical_address_allocator.h"
#include <array>
#include <cinttypes>
#include <functional>
namespace NEO {
class GraphicsAllocation;
typedef std::function<void(uint64_t addr, size_t size, size_t offset, uint64_t entryBits)> PageWalker;
template <class T, uint32_t level, uint32_t bits = 9>
class PageTable {
public:
PageTable(PhysicalAddressAllocator *physicalAddressAllocator) : allocator(physicalAddressAllocator) {
entries.fill(nullptr);
};
virtual ~PageTable() {
for (auto &e : entries)
delete e;
}
virtual uintptr_t map(uintptr_t vm, size_t size, uint64_t entryBits, uint32_t memoryBank);
virtual void pageWalk(uintptr_t vm, size_t size, size_t offset, uint64_t entryBits, PageWalker &pageWalker, uint32_t memoryBank);
static const size_t pageSize = 1 << 12;
static size_t getBits() {
return T::getBits() + bits;
}
protected:
std::array<T *, 1 << bits> entries;
PhysicalAddressAllocator *allocator = nullptr;
};
template <>
inline PageTable<void, 0, 9>::~PageTable() {
}
class PTE : public PageTable<void, 0u> {
public:
PTE(PhysicalAddressAllocator *physicalAddressAllocator) : PageTable<void, 0u>(physicalAddressAllocator) {}
uintptr_t map(uintptr_t vm, size_t size, uint64_t entryBits, uint32_t memoryBank) override;
void pageWalk(uintptr_t vm, size_t size, size_t offset, uint64_t entryBits, PageWalker &pageWalker, uint32_t memoryBank) override;
static const uint32_t level = 0;
static const uint32_t bits = 9;
};
class PDE : public PageTable<class PTE, 1> {
public:
PDE(PhysicalAddressAllocator *physicalAddressAllocator) : PageTable<class PTE, 1>(physicalAddressAllocator) {
}
};
class PDP : public PageTable<class PDE, 2> {
public:
PDP(PhysicalAddressAllocator *physicalAddressAllocator) : PageTable<class PDE, 2>(physicalAddressAllocator) {
}
};
class PML4 : public PageTable<class PDP, 3> {
public:
PML4(PhysicalAddressAllocator *physicalAddressAllocator) : PageTable<class PDP, 3>(physicalAddressAllocator) {
}
};
class PDPE : public PageTable<class PDE, 2, 2> {
public:
PDPE(PhysicalAddressAllocator *physicalAddressAllocator) : PageTable<class PDE, 2, 2>(physicalAddressAllocator) {
}
};
} // namespace NEO
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