mirror of
https://github.com/Atmosphere-NX/Atmosphere
synced 2024-09-19 22:59:00 +00:00
125 lines
4.2 KiB
C++
125 lines
4.2 KiB
C++
/*
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* Copyright (c) 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 "fusee_fatal.hpp"
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#include "fusee_external_package.hpp"
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#include "fs/fusee_fs_api.hpp"
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namespace ams::nxboot {
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namespace {
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constexpr inline const uintptr_t PMC = secmon::MemoryRegionPhysicalDevicePmc.GetAddress();
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Result SaveFatalErrorContext(const ams::impl::FatalErrorContext *ctx) {
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/* Create and open the file. */
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fs::FileHandle file;
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{
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/* Generate the file path. */
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char path[0x40];
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util::TSNPrintf(path, sizeof(path), "sdmc:/atmosphere/fatal_errors/report_%016" PRIx64 ".bin", ctx->report_identifier);
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/* Create the file. */
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R_TRY(fs::CreateFile(path, sizeof(*ctx)));
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/* Open the file. */
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R_TRY(fs::OpenFile(std::addressof(file), path, fs::OpenMode_ReadWrite));
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}
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/* Ensure we close the file when done with it. */
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ON_SCOPE_EXIT { fs::CloseFile(file); };
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/* Write the context to the file. */
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R_TRY(fs::WriteFile(file, 0, ctx, sizeof(*ctx), fs::WriteOption::Flush));
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R_SUCCEED();
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}
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}
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NORETURN void RebootToSelf() {
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/* Patch SDRAM init to perform an SVC immediately after second 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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/* Set SVC handler to jump to reboot stub in IRAM. */
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reg::Write(PMC + APBDEV_PMC_SCRATCH33, 0x4003F000);
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reg::Write(PMC + APBDEV_PMC_SCRATCH40, 0x6000F208);
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/* Set boot as warmboot. */
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reg::Write(PMC + APBDEV_PMC_SCRATCH0, (1 << 0));
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/* Copy reboot stub into high IRAM. */
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std::memcpy(reinterpret_cast<void *>(0x4003F000), GetExternalPackage().reboot_stub, sizeof(GetExternalPackage().reboot_stub));
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/* Copy our main payload into low IRAM. */
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std::memcpy(reinterpret_cast<void *>(0x40010000), GetExternalPackage().fusee, sizeof(GetExternalPackage().fusee));
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/* Reboot. */
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reg::Write(PMC + APBDEV_PMC_CNTRL, PMC_REG_BITS_ENUM(CNTRL_MAIN_RESET, ENABLE));
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/* Wait for the reboot to take. */
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AMS_INFINITE_LOOP();
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}
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void SaveAndShowFatalError() {
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/* Get the context (at static location in memory). */
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ams::impl::FatalErrorContext *f_ctx = reinterpret_cast<ams::impl::FatalErrorContext *>(0x4003E000);
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/* Check for valid magic. */
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if (f_ctx->magic != ams::impl::FatalErrorContext::Magic) {
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return;
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}
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/* Show the fatal error. */
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ShowFatalError(f_ctx, SaveFatalErrorContext(f_ctx));
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/* Clear the magic. */
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f_ctx->magic = ~f_ctx->magic;
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/* Wait for reboot. */
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WaitForReboot();
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}
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void WaitForReboot() {
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/* Wait for power button to be pressed. */
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while (!pmic::IsPowerButtonPressed()) {
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util::WaitMicroSeconds(100);
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}
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/* If not erista, just do a normal reboot. */
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if (fuse::GetSocType() != fuse::SocType_Erista) {
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/* Reboot. */
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pmic::ShutdownSystem(true);
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/* Wait for our reboot to complete. */
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AMS_INFINITE_LOOP();
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}
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/* Reboot to self, if we can. */
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if (GetExternalPackage().header.magic == ExternalPackageHeader::Magic) {
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RebootToSelf();
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} else {
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/* Just do a normal reboot. */
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pmic::ShutdownSystem(true);
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/* Wait for our reboot to complete. */
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AMS_INFINITE_LOOP();
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}
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}
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}
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