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LibBareMetal: Add Memory definitions

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Add classes of VirtualAddress & PhysicalAddress.
This commit is contained in:
Liav A 2020-02-09 18:00:00 +02:00 committed by Andreas Kling
parent 2a699cec98
commit de3637d85f
Notes: sideshowbarker 2024-07-19 09:30:01 +09:00 
Author: https://github.com/supercomputer7
Commit: https://github.com/SerenityOS/serenity/commit/de3637d85fb
Pull-request: https://github.com/SerenityOS/serenity/pull/1194
2 changed files with 143 additions and 0 deletions
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66
Libraries/LibBareMetal/Memory/PhysicalAddress.h Normal file
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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include <AK/LogStream.h>
#include <AK/Types.h>
class PhysicalAddress {
public:
PhysicalAddress() {}
explicit PhysicalAddress(uintptr_t address)
: m_address(address)
{
}
PhysicalAddress offset(uintptr_t o) const { return PhysicalAddress(m_address + o); }
uintptr_t get() const { return m_address; }
void set(uintptr_t address) { m_address = address; }
void mask(uintptr_t m) { m_address &= m; }
bool is_null() const { return m_address == 0; }
u8* as_ptr() { return reinterpret_cast<u8*>(m_address); }
const u8* as_ptr() const { return reinterpret_cast<const u8*>(m_address); }
PhysicalAddress page_base() const { return PhysicalAddress(m_address & 0xfffff000); }
bool operator==(const PhysicalAddress& other) const { return m_address == other.m_address; }
bool operator!=(const PhysicalAddress& other) const { return m_address != other.m_address; }
bool operator>(const PhysicalAddress& other) const { return m_address > other.m_address; }
bool operator>=(const PhysicalAddress& other) const { return m_address >= other.m_address; }
bool operator<(const PhysicalAddress& other) const { return m_address < other.m_address; }
bool operator<=(const PhysicalAddress& other) const { return m_address <= other.m_address; }
private:
uintptr_t m_address { 0 };
};
inline const LogStream& operator<<(const LogStream& stream, PhysicalAddress value)
{
return stream << 'P' << value.as_ptr();
}

77
Libraries/LibBareMetal/Memory/VirtualAddress.h Normal file
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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include <AK/LogStream.h>
#include <AK/Types.h>
class VirtualAddress {
public:
VirtualAddress() {}
explicit VirtualAddress(uintptr_t address)
: m_address(address)
{
}
explicit VirtualAddress(const void* address)
: m_address((uintptr_t)address)
{
}
bool is_null() const { return m_address == 0; }
bool is_page_aligned() const { return (m_address & 0xfff) == 0; }
VirtualAddress offset(uintptr_t o) const { return VirtualAddress(m_address + o); }
uintptr_t get() const { return m_address; }
void set(uintptr_t address) { m_address = address; }
void mask(uintptr_t m) { m_address &= m; }
bool operator<=(const VirtualAddress& other) const { return m_address <= other.m_address; }
bool operator>=(const VirtualAddress& other) const { return m_address >= other.m_address; }
bool operator>(const VirtualAddress& other) const { return m_address > other.m_address; }
bool operator<(const VirtualAddress& other) const { return m_address < other.m_address; }
bool operator==(const VirtualAddress& other) const { return m_address == other.m_address; }
bool operator!=(const VirtualAddress& other) const { return m_address != other.m_address; }
u8* as_ptr() { return reinterpret_cast<u8*>(m_address); }
const u8* as_ptr() const { return reinterpret_cast<const u8*>(m_address); }
VirtualAddress page_base() const { return VirtualAddress(m_address & 0xfffff000); }
private:
uintptr_t m_address { 0 };
};
inline VirtualAddress operator-(const VirtualAddress& a, const VirtualAddress& b)
{
return VirtualAddress(a.get() - b.get());
}
inline const LogStream& operator<<(const LogStream& stream, VirtualAddress value)
{
return stream << 'V' << value.as_ptr();
}