mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
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52 lines
1.7 KiB
C++
52 lines
1.7 KiB
C++
/*
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* Copyright (c) 2018-2019 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 "boot_pmc_wrapper.hpp"
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namespace ams::boot {
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namespace {
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/* Convenience definitions. */
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constexpr u32 SmcFunctionId_AtmosphereReadWriteRegister = 0xF0000002;
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constexpr u32 PmcPhysStart = 0x7000E400;
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constexpr u32 PmcPhysEnd = 0x7000EFFF;
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/* Helpers. */
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bool IsValidPmcAddress(u32 phys_addr) {
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return (phys_addr & 3) == 0 && PmcPhysStart <= phys_addr && phys_addr <= PmcPhysEnd;
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}
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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_ASSERT(spl::smc::ConvertResult(spl::smc::AtmosphereReadWriteRegister(phys_addr, mask, value, &out_value)));
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return out_value;
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}
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}
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u32 ReadPmcRegister(u32 phys_addr) {
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AMS_ASSERT(IsValidPmcAddress(phys_addr));
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return ReadWriteRegisterImpl(phys_addr, 0, 0);
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}
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void WritePmcRegister(u32 phys_addr, u32 value, u32 mask) {
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AMS_ASSERT(IsValidPmcAddress(phys_addr));
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ReadWriteRegisterImpl(phys_addr, value, mask);
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}
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}
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