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https://github.com/Atmosphere-NX/Atmosphere-libs.git
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44 lines
1.4 KiB
C++
44 lines
1.4 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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#include <mesosphere.hpp>
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namespace ams::kern::arm64 {
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namespace {
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constexpr size_t PageBits = __builtin_ctzll(PageSize);
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constexpr size_t NumLevels = 3;
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constexpr size_t LevelBits = 9;
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static_assert(NumLevels > 0);
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constexpr size_t AddressBits = (NumLevels - 1) * LevelBits + PageBits;
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static_assert(AddressBits <= BITSIZEOF(u64));
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constexpr size_t AddressSpaceSize = (1ull << AddressBits);
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}
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void KPageTableImpl::InitializeForKernel(void *tb, KVirtualAddress start, KVirtualAddress end) {
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this->table = static_cast<u64 *>(tb);
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this->is_kernel = true;
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this->num_entries = util::AlignUp(end - start, AddressSpaceSize) / AddressSpaceSize;
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}
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u64 *KPageTableImpl::Finalize() {
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return this->table;
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}
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}
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