mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
synced 2024-11-18 17:11:23 +00:00
47 lines
1.7 KiB
C++
47 lines
1.7 KiB
C++
/*
|
|
* Copyright (c) 2018-2020 Atmosphère-NX
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms and conditions of the GNU General Public License,
|
|
* version 2, as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
* more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
#pragma once
|
|
#include <mesosphere/kern_slab_helpers.hpp>
|
|
#include <mesosphere/kern_k_memory_layout.hpp>
|
|
|
|
namespace ams::kern {
|
|
|
|
class KPageBuffer : public KSlabAllocated<KPageBuffer> {
|
|
private:
|
|
alignas(PageSize) u8 m_buffer[PageSize];
|
|
public:
|
|
KPageBuffer() {
|
|
std::memset(m_buffer, 0, sizeof(m_buffer));
|
|
}
|
|
|
|
ALWAYS_INLINE KPhysicalAddress GetPhysicalAddress() const {
|
|
return KMemoryLayout::GetLinearPhysicalAddress(KVirtualAddress(this));
|
|
}
|
|
|
|
static ALWAYS_INLINE KPageBuffer *FromPhysicalAddress(KPhysicalAddress phys_addr) {
|
|
const KVirtualAddress virt_addr = KMemoryLayout::GetLinearVirtualAddress(phys_addr);
|
|
|
|
MESOSPHERE_ASSERT(util::IsAligned(GetInteger(phys_addr), PageSize));
|
|
MESOSPHERE_ASSERT(util::IsAligned(GetInteger(virt_addr), PageSize));
|
|
|
|
return GetPointer<KPageBuffer>(virt_addr);
|
|
}
|
|
};
|
|
static_assert(sizeof(KPageBuffer) == PageSize);
|
|
static_assert(alignof(KPageBuffer) == PageSize);
|
|
|
|
}
|