2019-02-20 12:52:11 +00:00
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/*
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2019-04-08 11:47:01 +01:00
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* Copyright (c) 2018-2019 Atmosphère-NX
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2019-02-20 12:52:11 +00:00
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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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.section .text.start, "ax", %progbits
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.arm
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.align 5
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.global _start
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.type _start, %function
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_start:
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/* Set coldboot */
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mov r0, #0x0
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ldr r1, =0x7000E400
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str r0, [r1, #0x50]
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/* Tell pk1ldr normal reboot, no error */
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str r0, [r1, #0x1B4]
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str r0, [r1, #0x840]
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/* Cleanup SVC handler address. */
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ldr r0, =0x40004C30
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ldr r1, =0x6000F208
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str r0, [r1]
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/* Disable RCM forcefully */
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mov r0, #0x4
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ldr r1, =0x15DC
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ldr r2, =0xE020
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bl ipatch_word
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/* Patch BCT signature check */
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mov r0, #0x5
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ldr r1, =0x4AEE
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ldr r2, =0xE05B
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bl ipatch_word
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/* Patch bootloader read */
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mov r0, #0x6
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ldr r1, =0x4E88
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ldr r2, =0xE018
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bl ipatch_word
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ldr r0, =__main_phys_start__
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ldr r1, =__main_start__
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mov r2, #0x0
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ldr r3, =(__main_size__)
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copy_panic_payload:
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ldr r4, [r0, r2]
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str r4, [r1, r2]
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add r2, r2, #0x4
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cmp r2, r3
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bne copy_panic_payload
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/* Jump back to bootrom start. */
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ldr r0, =0x101010
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bx r0
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/* Unused, but forces inclusion in binary. */
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b main
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.section .text.ipatch_word, "ax", %progbits
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.arm
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.align 5
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.global ipatch_word
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.type ipatch_word, %function
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ipatch_word:
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ldr r3, =0x6001dc00
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lsl r0, r0, #0x2
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lsr r1, r1, #0x1
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lsl r1, r1, #0x10
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orr r1, r1, r2
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str r1, [r3, r0]
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bx lr
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.section .text.jump_to_main, "ax", %progbits
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.arm
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.align 5
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.global jump_to_main
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.type jump_to_main, %function
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jump_to_main:
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/* Just jump to main */
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ldr sp, =__stack_top__
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b main
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