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boot: implement voltage change

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This commit is contained in:
Michael Scire 2019-04-29 07:22:49 -07:00
parent 9c53c0c0cc
commit e58948a42b
4 changed files with 126 additions and 1 deletions
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57
stratosphere/boot/source/boot_pmc_wrapper.cpp Normal file
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/*
* Copyright (c) 2018-2019 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/>.
*/
#include "boot_functions.hpp"
static constexpr u32 SmcFunctionId_AtmosphereReadWriteRegister = 0xF0000002;
static constexpr u32 PmcPhysStart = 0x7000E400;
static constexpr u32 PmcPhysEnd = 0x7000EFFF;
static inline bool IsValidPmcAddress(u32 phys_addr) {
return (phys_addr & 3) == 0 && PmcPhysStart <= phys_addr && phys_addr <= PmcPhysEnd;
}
static inline u32 SmcAtmosphereReadWriteRegister(u32 phys_addr, u32 value, u32 mask) {
SecmonArgs args;
args.X[0] = SmcFunctionId_AtmosphereReadWriteRegister;
args.X[1] = phys_addr;
args.X[2] = mask;
args.X[3] = value;
svcCallSecureMonitor(&args);
if (args.X[0] != 0) {
std::abort();
}
return static_cast<u32>(args.X[1]);
}
u32 Boot::ReadPmcRegister(u32 phys_addr) {
if (!IsValidPmcAddress(phys_addr)) {
std::abort();
}
return SmcAtmosphereReadWriteRegister(phys_addr, 0, 0);
}
void Boot::WritePmcRegister(u32 phys_addr, u32 value, u32 mask) {
if (!IsValidPmcAddress(phys_addr)) {
std::abort();
}
SmcAtmosphereReadWriteRegister(phys_addr, value, mask);
}