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98 lines
3 KiB
C
98 lines
3 KiB
C
/*
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* Copyright (c) 2018-2019 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 "utils.h"
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#include "lp0.h"
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#include "mc.h"
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#include "pmc.h"
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#include "misc.h"
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#include "fuse.h"
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#include "car.h"
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#include "emc.h"
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#include "cluster.h"
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#include "flow.h"
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#include "timer.h"
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#include "secmon.h"
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void reboot(void) {
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/* Write MAIN_RST */
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APBDEV_PMC_CNTRL_0 = 0x10;
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while (true) {
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/* Wait for reboot. */
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}
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}
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void lp0_entry_main(warmboot_metadata_t *meta) {
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const uint32_t target_firmware = meta->target_firmware;
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/* Before doing anything else, ensure some sanity. */
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if (meta->magic != WARMBOOT_MAGIC || target_firmware > ATMOSPHERE_TARGET_FIRMWARE_MAX) {
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reboot();
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}
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/* [4.0.0+] First thing warmboot does is disable BPMP access to memory. */
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if (target_firmware >= ATMOSPHERE_TARGET_FIRMWARE_400) {
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disable_bpmp_access_to_dram();
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}
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/* Configure debugging depending on FUSE_PRODUCTION_MODE */
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misc_configure_device_dbg_settings();
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/* Check for downgrade. */
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/* NOTE: We implemented this as "return false" */
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if (fuse_check_downgrade_status()) {
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reboot();
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}
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if (target_firmware >= ATMOSPHERE_TARGET_FIRMWARE_300) {
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/* Nintendo's firmware checks APBDEV_PMC_SECURE_SCRATCH32_0 against a per-warmboot binary value here. */
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/* We won't bother with that. */
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if (false /* APBDEV_PMC_SECURE_SCRATCH32_0 == WARMBOOT_MAGIC_NUMBER */) {
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reboot();
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}
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}
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/* TODO: Check that we're running at the correct physical address. */
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/* Setup fuses, disable bypass. */
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fuse_configure_fuse_bypass();
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/* Configure oscillators/timing in CAR. */
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car_configure_oscillators();
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/* Restore RAM configuration. */
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misc_restore_ram_svop();
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emc_configure_pmacro_training();
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/* Setup clock output for all devices, working around mbist bug. */
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car_mbist_workaround();
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/* Initialize the CPU cluster. */
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cluster_initialize_cpu();
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secmon_restore_to_tzram(target_firmware);
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/* Power on the CPU cluster. */
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cluster_power_on_cpu();
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/* Nintendo clears most of warmboot.bin out of IRAM here. We're not gonna bother. */
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/* memset( ... ); */
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const uint32_t halt_val = (target_firmware >= ATMOSPHERE_TARGET_FIRMWARE_400) ? 0x40000000 : 0x50000000;
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while (true) {
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/* Halt the BPMP. */
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FLOW_CTLR_HALT_COP_EVENTS_0 = halt_val;
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}
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}
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