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https://github.com/Atmosphere-NX/Atmosphere.git
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48 lines
1.7 KiB
C
48 lines
1.7 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 <stdint.h>
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#include "utils.h"
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#include "misc.h"
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#include "fuse.h"
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#include "sysreg.h"
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#include "pmc.h"
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void configure_device_dbg_settings(void) {
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/* Enable RTCK daisychaining by setting TBE bit. */
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APB_MISC_PP_CONFIG_CTL_0 = 0x80;
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/* Literally none of this is documented in the TRM, lol. */
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if (FUSE_CHIP_REGS->FUSE_SECURITY_MODE == 1) {
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uint32_t secure_boot_val = 0b0100; /* Sets NIDEN for aarch64. */
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uint32_t misc_val = 0x40;
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if (APBDEV_PMC_STICKY_BITS_0 & 0x40) {
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misc_val = 0x0;
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} else {
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secure_boot_val = 0b1101; /* Sets SPNIDEN, NIDEN, DBGEN for aarch64. */
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}
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SB_PFCFG_0 = (SB_PFCFG_0 & ~0b1111) | secure_boot_val; /* Configures debug bits. */
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APB_MISC_PP_CONFIG_CTL_0 |= misc_val; /* Undocumented, seems to control invasive debugging/JTAG. */
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}
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/* Set sticky bits based SECURITY_MODE. */
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APBDEV_PMC_STICKY_BITS_0 |= FUSE_CHIP_REGS->FUSE_SECURITY_MODE;
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/* Set E_INPUT in PINMUX_AUX_GPIO_PA6_0 */
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PINMUX_AUX_GPIO_PA6_0 |= 0x40;
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}
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