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21d5f4ada1
This was supposed to be the foundation for some kind of pre-kernel environment, but nobody is working on it right now, so let's move everything back into the kernel and remove all the confusion.
68 lines
2.9 KiB
C++
68 lines
2.9 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include <AK/LogStream.h>
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#include <AK/Types.h>
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class PhysicalAddress {
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public:
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PhysicalAddress() {}
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explicit PhysicalAddress(FlatPtr address)
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: m_address(address)
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{
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}
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PhysicalAddress offset(FlatPtr o) const { return PhysicalAddress(m_address + o); }
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FlatPtr get() const { return m_address; }
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void set(FlatPtr address) { m_address = address; }
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void mask(FlatPtr m) { m_address &= m; }
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bool is_null() const { return m_address == 0; }
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u8* as_ptr() { return reinterpret_cast<u8*>(m_address); }
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const u8* as_ptr() const { return reinterpret_cast<const u8*>(m_address); }
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PhysicalAddress page_base() const { return PhysicalAddress(m_address & 0xfffff000); }
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FlatPtr offset_in_page() const { return PhysicalAddress(m_address & 0xfff).get(); }
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bool operator==(const PhysicalAddress& other) const { return m_address == other.m_address; }
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bool operator!=(const PhysicalAddress& other) const { return m_address != other.m_address; }
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bool operator>(const PhysicalAddress& other) const { return m_address > other.m_address; }
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bool operator>=(const PhysicalAddress& other) const { return m_address >= other.m_address; }
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bool operator<(const PhysicalAddress& other) const { return m_address < other.m_address; }
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bool operator<=(const PhysicalAddress& other) const { return m_address <= other.m_address; }
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private:
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FlatPtr m_address { 0 };
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};
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inline const LogStream& operator<<(const LogStream& stream, PhysicalAddress value)
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{
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return stream << 'P' << value.as_ptr();
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}
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