mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
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65 lines
2.1 KiB
C++
65 lines
2.1 KiB
C++
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/*
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* Copyright (c) 2018 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 <switch.h>
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#include <stratosphere.hpp>
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#include <string.h>
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#include "fatal_types.hpp"
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#include "fatal_payload_manager.hpp"
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/* TODO: Find a way to pre-populate this with the contents of fusee-primary. */
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static u8 g_reboot_payload[IRAM_PAYLOAD_MAX_SIZE] __attribute__ ((aligned (0x1000)));
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static u8 g_work_page[0x1000] __attribute__ ((aligned (0x1000)));
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static bool g_payload_loaded = false;
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void FatalPayloadManager::LoadPayloadFromSdCard() {
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FILE *f = fopen("sdmc:/atmosphere/reboot_payload.bin", "rb");
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if (f == NULL) {
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return;
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}
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ON_SCOPE_EXIT { fclose(f); };
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memset(g_reboot_payload, 0xFF, sizeof(g_reboot_payload));
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fread(g_reboot_payload, 1, IRAM_PAYLOAD_MAX_SIZE, f);
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g_payload_loaded = true;
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}
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static void ClearIram() {
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/* Make page FFs. */
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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 < IRAM_PAYLOAD_MAX_SIZE; ofs += sizeof(g_work_page)) {
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CopyToIram(IRAM_PAYLOAD_BASE + ofs, g_work_page, sizeof(g_work_page));
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}
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}
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void FatalPayloadManager::RebootToPayload() {
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/* If we don't actually have a payload loaded, just go to RCM. */
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if (!g_payload_loaded) {
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RebootToRcm();
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}
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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 < sizeof(g_reboot_payload); ofs += 0x1000) {
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CopyToIram(IRAM_PAYLOAD_BASE + ofs, &g_reboot_payload[ofs], 0x1000);
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}
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RebootToIramPayload();
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}
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