mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
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67 lines
2 KiB
C++
67 lines
2 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 sts::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 SmcAtmosphereReadWriteRegister(u32 phys_addr, u32 value, u32 mask) {
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SecmonArgs args;
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args.X[0] = SmcFunctionId_AtmosphereReadWriteRegister;
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args.X[1] = phys_addr;
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args.X[2] = mask;
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args.X[3] = value;
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R_ASSERT(svcCallSecureMonitor(&args));
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if (args.X[0] != 0) {
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std::abort();
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}
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return static_cast<u32>(args.X[1]);
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}
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}
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u32 ReadPmcRegister(u32 phys_addr) {
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if (!IsValidPmcAddress(phys_addr)) {
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std::abort();
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}
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return SmcAtmosphereReadWriteRegister(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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if (!IsValidPmcAddress(phys_addr)) {
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std::abort();
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}
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SmcAtmosphereReadWriteRegister(phys_addr, value, mask);
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}
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}
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