mirror of
https://github.com/Atmosphere-NX/Atmosphere
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120 lines
4 KiB
C++
120 lines
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 <exosphere.hpp>
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#include "secmon_map.hpp"
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#include "secmon_page_mapper.hpp"
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#include "secmon_user_power_management.hpp"
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#include "rebootstub_bin.h"
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namespace ams::secmon {
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namespace {
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constexpr inline const uintptr_t PMC = MemoryRegionVirtualDevicePmc.GetAddress();
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constexpr inline const u32 RebootStubPhysicalAddress = MemoryRegionPhysicalIramRebootStub.GetAddress();
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enum RebootStubAction {
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RebootStubAction_ShutDown = 0,
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RebootStubAction_JumpToPayload = 1,
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};
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NORETURN void PerformPmcReboot() {
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/* Write MAIN_RST. */
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reg::Write(PMC + APBDEV_PMC_CNTRL, 0x10);
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while (true) {
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/* ... */
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}
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}
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void LoadRebootStub(u32 action) {
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/* Configure the bootrom to boot to warmboot payload. */
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reg::Write(PMC + APBDEV_PMC_SCRATCH0, 0x1);
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/* Patch the bootrom to perform an SVC immediately after the second spare write. */
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reg::Write(PMC + APBDEV_PMC_SCRATCH45, 0x2E38DFFF);
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reg::Write(PMC + APBDEV_PMC_SCRATCH46, 0x6001DC28);
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/* Patch the bootrom to jump to the reboot stub we'll prepare in iram on SVC. */
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reg::Write(PMC + APBDEV_PMC_SCRATCH33, RebootStubPhysicalAddress);
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reg::Write(PMC + APBDEV_PMC_SCRATCH40, 0x6000F208);
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{
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/* Map the iram page. */
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AtmosphereIramPageMapper mapper(RebootStubPhysicalAddress);
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AMS_ABORT_UNLESS(mapper.Map());
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/* Copy the reboot stub. */
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AMS_ABORT_UNLESS(mapper.CopyToMapping(RebootStubPhysicalAddress, rebootstub_bin, rebootstub_bin_size));
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/* Set the reboot type. */
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AMS_ABORT_UNLESS(mapper.CopyToMapping(RebootStubPhysicalAddress + 4, std::addressof(action), sizeof(action)));
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}
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}
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}
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void PerformUserRebootToRcm() {
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/* Configure the bootrom to boot to rcm. */
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reg::Write(PMC + APBDEV_PMC_SCRATCH0, 0x2);
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/* Reboot. */
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PerformPmcReboot();
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}
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void PerformUserRebootToPayload() {
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/* Load our reboot stub to iram. */
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LoadRebootStub(RebootStubAction_JumpToPayload);
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/* Reboot. */
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PerformPmcReboot();
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}
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void PerformUserRebootToFatalError() {
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if (fuse::GetSocType() == fuse::SocType_Erista) {
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/* On Erista, we reboot to fatal error by jumping to fusee primary's handler. */
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return PerformUserRebootToPayload();
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} else /* if (fuse::GetSocType() == fuse::SocType_Mariko) */ {
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/* TODO: Send a SGI FIQ to the other CPUs, so that user code stops executing. */
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/* TODO: On cores other than 3, halt/wfi. */
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/* Map Dram for the mariko program. */
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MapDramForMarikoProgram();
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AMS_SECMON_LOG("%s\n", "Jumping to Mariko Fatal.");
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AMS_LOG_FLUSH();
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/* Jump to the mariko fatal program. */
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reinterpret_cast<void (*)()>(secmon::MemoryRegionVirtualTzramMarikoProgram.GetAddress())();
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/* The mariko fatal program never returns. */
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__builtin_unreachable();
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}
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}
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void PerformUserShutDown() {
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/* Load our reboot stub to iram. */
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LoadRebootStub(RebootStubAction_ShutDown);
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/* Reboot. */
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PerformPmcReboot();
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}
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}
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