mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
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74 lines
2.5 KiB
C++
74 lines
2.5 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 "boot_power_utils.hpp"
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#include "fusee-primary_bin.h"
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namespace ams::boot {
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namespace {
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/* Convenience definitions. */
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constexpr uintptr_t IramBase = 0x40000000ull;
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constexpr uintptr_t IramPayloadBase = 0x40010000ull;
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constexpr size_t IramSize = 0x40000;
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constexpr size_t IramPayloadMaxSize = 0x2E000;
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/* Globals. */
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alignas(os::MemoryPageSize) u8 g_work_page[os::MemoryPageSize];
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/* Helpers. */
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void ClearIram() {
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/* Make page FFs. */
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std::memset(g_work_page, 0xFF, sizeof(g_work_page));
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/* Overwrite all of IRAM with FFs. */
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for (size_t ofs = 0; ofs < IramSize; ofs += sizeof(g_work_page)) {
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exosphere::CopyToIram(IramBase + ofs, g_work_page, sizeof(g_work_page));
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}
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}
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void DoRebootToPayload(ams::FatalErrorContext *ctx) {
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/* Ensure clean IRAM state. */
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ClearIram();
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/* Copy in payload. */
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for (size_t ofs = 0; ofs < fusee_primary_bin_size; ofs += sizeof(g_work_page)) {
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std::memcpy(g_work_page, &fusee_primary_bin[ofs], std::min(static_cast<size_t>(fusee_primary_bin_size - ofs), sizeof(g_work_page)));
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exosphere::CopyToIram(IramPayloadBase + ofs, g_work_page, sizeof(g_work_page));
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}
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/* Copy in fatal error context, if relevant. */
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if (ctx != nullptr) {
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std::memset(g_work_page, 0xCC, sizeof(g_work_page));
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std::memcpy(g_work_page, ctx, sizeof(*ctx));
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exosphere::CopyToIram(IramPayloadBase + IramPayloadMaxSize, g_work_page, sizeof(g_work_page));
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}
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exosphere::ForceRebootToIramPayload();
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}
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}
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void RebootSystem() {
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DoRebootToPayload(nullptr);
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}
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void RebootForFatalError(ams::FatalErrorContext *ctx) {
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DoRebootToPayload(ctx);
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}
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}
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