mirror of
https://github.com/Atmosphere-NX/Atmosphere
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46 lines
1.7 KiB
C++
46 lines
1.7 KiB
C++
/*
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* Copyright (c) 2018-2020 Atmosphère-NX
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include <mesosphere/kern_slab_helpers.hpp>
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#include <mesosphere/kern_k_memory_layout.hpp>
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namespace ams::kern {
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class KPageBuffer : public KSlabAllocated<KPageBuffer> {
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private:
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alignas(PageSize) u8 m_buffer[PageSize];
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public:
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KPageBuffer() {
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std::memset(m_buffer, 0, sizeof(m_buffer));
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}
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ALWAYS_INLINE KPhysicalAddress GetPhysicalAddress() const {
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return KMemoryLayout::GetLinearPhysicalAddress(KVirtualAddress(this));
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}
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static ALWAYS_INLINE KPageBuffer *FromPhysicalAddress(KPhysicalAddress phys_addr) {
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const KVirtualAddress virt_addr = KMemoryLayout::GetLinearVirtualAddress(phys_addr);
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MESOSPHERE_ASSERT(util::IsAligned(GetInteger(phys_addr), PageSize));
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MESOSPHERE_ASSERT(util::IsAligned(GetInteger(virt_addr), PageSize));
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return GetPointer<KPageBuffer>(virt_addr);
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}
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};
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static_assert(sizeof(KPageBuffer) == PageSize);
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static_assert(alignof(KPageBuffer) == PageSize);
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}
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