mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
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55 lines
1.9 KiB
C++
55 lines
1.9 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 <stratosphere.hpp>
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namespace ams::dd {
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uintptr_t QueryIoMapping(uintptr_t phys_addr, size_t size) {
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u64 virtual_addr;
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const u64 aligned_addr = util::AlignDown(phys_addr, os::MemoryPageSize);
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const size_t offset = phys_addr - aligned_addr;
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const u64 aligned_size = size + offset;
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R_TRY_CATCH(svcQueryIoMapping(&virtual_addr, aligned_addr, aligned_size)) {
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/* Official software handles this by returning 0. */
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R_CATCH(svc::ResultNotFound) { return 0; }
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} R_END_TRY_CATCH_WITH_ABORT_UNLESS;
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return static_cast<uintptr_t>(virtual_addr + offset);
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}
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namespace {
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inline u32 ReadWriteRegisterImpl(uintptr_t phys_addr, u32 value, u32 mask) {
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u32 out_value;
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R_ABORT_UNLESS(svcReadWriteRegister(&out_value, phys_addr, mask, value));
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return out_value;
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}
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}
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u32 ReadRegister(uintptr_t phys_addr) {
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return ReadWriteRegisterImpl(phys_addr, 0, 0);
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}
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void WriteRegister(uintptr_t phys_addr, u32 value) {
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ReadWriteRegisterImpl(phys_addr, value, ~u32());
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}
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u32 ReadWriteRegister(uintptr_t phys_addr, u32 value, u32 mask) {
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return ReadWriteRegisterImpl(phys_addr, value, mask);
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}
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}
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