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https://github.com/Atmosphere-NX/Atmosphere.git
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90 lines
3.4 KiB
C++
90 lines
3.4 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_cpu_context.hpp"
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#include "secmon_map.hpp"
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#include "secmon_page_mapper.hpp"
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#include "secmon_mariko_fatal_error.hpp"
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#include "smc/secmon_smc_power_management.hpp"
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namespace ams::secmon {
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namespace {
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constinit u8 g_fatal_error_mask = 0;
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}
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void HandleMarikoFatalErrorInterrupt() {
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/* This interrupt handler doesn't return, so mark that we're at end of interrupt. */
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gic::SetEndOfInterrupt(MarikoFatalErrorInterruptId);
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/* Get the current core id. */
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const auto core_id = hw::GetCurrentCoreId();
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/* Set that we received the fatal on the current core. */
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g_fatal_error_mask |= (1u << core_id);
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hw::FlushDataCache(std::addressof(g_fatal_error_mask), sizeof(g_fatal_error_mask));
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hw::DataSynchronizationBarrier();
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/* If not all cores have received the fatal, we need to trigger the interrupt on other cores. */
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if (g_fatal_error_mask != (1u << NumCores) - 1) {
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/* Configure and send the interrupt to the next core. */
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const auto next_core = __builtin_ctz(~g_fatal_error_mask);
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gic::SetSpiTargetCpu(MarikoFatalErrorInterruptId, (1u << next_core));
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gic::SetPending(MarikoFatalErrorInterruptId);
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}
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/* If current core is not 3, kill ourselves. */
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if (core_id != NumCores - 1) {
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smc::PowerOffCpu();
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} else {
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/* Wait for all cores to kill themselves. */
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while (g_fatal_error_mask != (1u << NumCores) - 1) {
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util::WaitMicroSeconds(100);
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}
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}
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/* Copy the fatal error context to mariko tzram. */
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{
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/* Map the iram page. */
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constexpr uintptr_t FatalErrorPhysicalAddress = MemoryRegionPhysicalIramFatalErrorContext.GetAddress();
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AtmosphereIramPageMapper mapper(FatalErrorPhysicalAddress);
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if (mapper.Map()) {
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/* Copy the fatal error context. */
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void *dst = MemoryRegionVirtualTzramMarikoProgramFatalErrorContext.GetPointer<void>();
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const void *src = mapper.GetPointerTo(FatalErrorPhysicalAddress, sizeof(ams::impl::FatalErrorContext));
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std::memcpy(dst, src, sizeof(ams::impl::FatalErrorContext));
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}
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}
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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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AMS_INFINITE_LOOP();
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}
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}
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