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