mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
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106 lines
3.7 KiB
C++
106 lines
3.7 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 "warmboot_bootrom_workaround.hpp"
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#include "warmboot_clkrst.hpp"
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#include "warmboot_cpu_cluster.hpp"
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#include "warmboot_dram.hpp"
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#include "warmboot_main.hpp"
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#include "warmboot_misc.hpp"
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#include "warmboot_secure_monitor.hpp"
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namespace ams::warmboot {
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namespace {
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constexpr inline const uintptr_t PMC = secmon::MemoryRegionPhysicalDevicePmc.GetAddress();
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constexpr inline const uintptr_t FLOW_CTLR = secmon::MemoryRegionPhysicalDeviceFlowController.GetAddress();
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constexpr inline const uintptr_t ExpectedMetadataAddress = 0x40010244;
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}
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void Main(const Metadata *metadata) {
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/* Ensure that we're running under vaguely sane conditions. */
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AMS_ABORT_UNLESS(metadata->magic == Metadata::Magic);
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AMS_ABORT_UNLESS(metadata->target_firmware <= ams::TargetFirmware_Max);
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/* Restrict the bpmp's access to dram. */
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if (metadata->target_firmware >= TargetFirmware_4_0_0) {
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RestrictBpmpAccessToMainMemory();
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}
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/* Configure rtck-daisychaining/jtag. */
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ConfigureMiscSystemDebug();
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/* NOTE: Here, Nintendo checks that the number of burnt anti-downgrade fuses is valid. */
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/* NOTE: Here, Nintendo validates that APBDEV_PMC_SECURE_SCRATCH32 contains the correct magic number for the current warmboot firmware revision. */
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/* Validate that we're executing at the correct address. */
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AMS_ABORT_UNLESS(reinterpret_cast<uintptr_t>(metadata) == ExpectedMetadataAddress);
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/* Validate that we're executing on the bpmp. */
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AMS_ABORT_UNLESS(reg::Read(PG_UP(PG_UP_TAG)) == PG_UP_TAG_PID_COP);
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/* Configure fuse bypass. */
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fuse::ConfigureFuseBypass();
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/* Configure system oscillators. */
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ConfigureOscillators();
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/* Restore DRAM configuration. */
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RestoreRamSvop();
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ConfigureEmcPmacroTraining();
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/* If on Erista, work around the bootrom mbist issue. */
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if (fuse::GetSocType() == fuse::SocType_Erista) {
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ApplyMbistWorkaround();
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}
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/* Initialize the cpu cluster. */
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InitializeCpuCluster();
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/* Restore the secure monitor to tzram. */
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RestoreSecureMonitorToTzram(metadata->target_firmware);
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/* Power on the cpu. */
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PowerOnCpu();
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/* Halt ourselves. */
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while (true) {
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reg::Write(secmon::MemoryRegionPhysicalDeviceFlowController.GetAddress() + FLOW_CTLR_HALT_COP_EVENTS, FLOW_REG_BITS_ENUM(HALT_COP_EVENTS_MODE, FLOW_MODE_STOP),
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FLOW_REG_BITS_ENUM(HALT_COP_EVENTS_JTAG, ENABLED));
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}
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}
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NORETURN void ExceptionHandler() {
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/* Write enable to MAIN_RESET. */
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reg::Write(PMC + APBDEV_PMC_CNTRL, PMC_REG_BITS_ENUM(CNTRL_MAIN_RESET, ENABLE));
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/* Wait forever until we're reset. */
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AMS_INFINITE_LOOP();
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}
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}
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namespace ams::diag {
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void AbortImpl() {
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warmboot::ExceptionHandler();
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}
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}
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