mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
synced 2024-11-13 15:36:40 +00:00
71 lines
2.4 KiB
C
71 lines
2.4 KiB
C
/*
|
|
* Copyright (c) 2018 Atmosphère-NX
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms and conditions of the GNU General Public License,
|
|
* version 2, as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
* more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <stdint.h>
|
|
|
|
#include "utils.h"
|
|
#include "fuse.h"
|
|
#include "car.h"
|
|
#include "pmc.h"
|
|
|
|
#define NUM_FUSE_BYPASS_ENTRIES 0
|
|
|
|
bool fuse_check_downgrade_status(void) {
|
|
/* We aren't going to implement anti-downgrade. */
|
|
return false;
|
|
}
|
|
|
|
static fuse_bypass_data_t g_fuse_bypass_entries[NUM_FUSE_BYPASS_ENTRIES] = {
|
|
/* No entries here. */
|
|
};
|
|
|
|
void fuse_configure_fuse_bypass(void) {
|
|
/* Enable fuses in CAR? This seems to affect fuse data visibility. */
|
|
CLK_RST_CONTROLLER_MISC_CLK_ENB_0 |= 0x10000000;
|
|
|
|
/* Configure bypass/override, only if programming is allowed. */
|
|
if (!(FUSE_REGS->FUSE_DIS_PGM & 1)) {
|
|
/* Enable write access. */
|
|
FUSE_REGS->FUSE_WRITE_ACCESS = (FUSE_REGS->FUSE_WRITE_ACCESS & ~0x1) | 0x10000;
|
|
/* Enable fuse bypass config. */
|
|
FUSE_REGS->FUSE_FUSEBYPASS = 1;
|
|
|
|
/* Override fuses. */
|
|
for (size_t i = 0; i < NUM_FUSE_BYPASS_ENTRIES; i++) {
|
|
MAKE_FUSE_REG(g_fuse_bypass_entries[i].offset) = g_fuse_bypass_entries[i].value;
|
|
}
|
|
|
|
/* Disable fuse write access. */
|
|
FUSE_REGS->FUSE_WRITE_ACCESS |= 1;
|
|
|
|
/* Enable fuse bypass config. */
|
|
/* I think this is a bug, and Nintendo meant to write 0 here? */
|
|
FUSE_REGS->FUSE_FUSEBYPASS = 1;
|
|
|
|
/* This...clears the disable programming bit(?). */
|
|
/* I have no idea why this happens. What? */
|
|
/* This is probably also either a bug or does nothing. */
|
|
/* Is this bit even clearable? */
|
|
FUSE_REGS->FUSE_DIS_PGM &= 0xFFFFFFFE;
|
|
|
|
/* Restore saved private key disable bit. */
|
|
FUSE_REGS->FUSE_PRIVATEKEYDISABLE |= (APBDEV_PMC_SECURE_SCRATCH21_0 & 0x10);
|
|
|
|
/* Lock private key disable secure scratch. */
|
|
APBDEV_PMC_SEC_DISABLE2_0 |= 0x4000000;
|
|
}
|
|
|
|
}
|