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fusee-primary: fix reboot-to-self for decompressed code

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This commit is contained in:
Michael Scire 2020-11-29 18:17:51 -08:00
parent 7ed9bdd374
commit dc52610bd8
3 changed files with 108 additions and 1 deletions
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6
fusee/fusee-primary/fusee-primary-main/linker.ld
View file

@ -32,6 +32,11 @@ SECTIONS
KEEP( *(.text.start) )
KEEP( *(.init) )
. = ALIGN(32);
PROVIDE (__reboot_start__ = ABSOLUTE(.));
KEEP( *(.reboot*) )
. = ALIGN(4);
PROVIDE (__reboot_end__ = ABSOLUTE(.));
. = ALIGN(32);
} >main :crt0
.chainloader_loadable :
@ -59,6 +64,7 @@ SECTIONS
{
. = ALIGN(32);
/* .text */
*(.text.reboot_to_self)
*(.text)
*(.text.*)
*(.glue_7)

76
fusee/fusee-primary/fusee-primary-main/src/reboot_start.s Normal file
View file

@ -0,0 +1,76 @@
/*
* Copyright (c) 2018-2020 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/>.
*/
.macro CLEAR_GPR_REG_ITER
mov r\@, #0
.endm
.section .reboot.start, "ax", %progbits
.arm
.align 5
.global reboot_start
.type reboot_start, %function
reboot_start:
/* Switch to system mode, mask all interrupts, clear all flags */
msr cpsr_cxsf, #0xDF
/* Relocate reboot start to 0x4003E000. */
ldr r0, =0x4003E000
adr r1, reboot_start
cmp r0, r1
beq 1f
mov r2, #0x1000
0:
ldmia r1!, {r5-r12}
stmia r0!, {r5-r12}
subs r2, #0x20
bne 0b
ldr r0, =0x4003E000
adr r1, reboot_start
adr r2, 1f
sub r2, r2, r1
add r2, r2, r0
bx r2
1:
/* Restore our low iram code. */
ldr r0, =0x40008000
ldr r1, =0x40030000
mov r2, #0x8000
0:
ldmia r1!, {r5-r12}
stmia r0!, {r5-r12}
subs r2, #0x20
bne 0b
/* Restore our upper stub code. */
ldr r0, =0x40010000
ldr r1, =0x4003D000
mov r2, #0x1000
0:
ldmia r1!, {r5-r12}
stmia r0!, {r5-r12}
subs r2, #0x20
bne 0b
/* Jump to start. */
ldr r0, =0x40008000
bx r0
0: b 0b

27
fusee/fusee-primary/fusee-primary-main/src/utils.c
View file

@ -37,6 +37,8 @@
#undef u8
#undef u32
extern uint8_t __reboot_start__[], __reboot_end__[];
void wait(uint32_t microseconds) {
uint32_t old_time = TIMERUS_CNTR_1US_0;
while (TIMERUS_CNTR_1US_0 - old_time <= microseconds) {
@ -80,8 +82,31 @@ __attribute__((noreturn)) void reboot_to_self(void) {
write32le((void *)0x4003F000, i, read32le(rebootstub_bin, i));
}
/* Copy our low part into safe IRAM. */
for (size_t i = 0; i < 0x8000; i += sizeof(uint32_t)) {
write32le((void *)0x40030000, i, read32le((void *)0x40008000, i));
}
/* Copy our start page into fatal IRAM. */
for (size_t i = 0; i < 0x1000; i += sizeof(uint32_t)) {
write32le((void *)0x4003D000, i, read32le((void *)0x40010000, i));
}
/* Copy our reboot handler to the rebootstub target. */
for (size_t i = 0; i < (__reboot_end__ - __reboot_start__); i += sizeof(uint32_t)) {
write32le((void *)0x40010000, i, read32le(__reboot_start__, i));
}
/* Trigger warm reboot. */
pmc_reboot(1 << 0);
APBDEV_PMC_SCRATCH0_0 = (1 << 0);
/* Reset the processor. */
APBDEV_PMC_CONTROL = BIT(4);
while (true) {
/* Wait for reboot. */
}
}
__attribute__((noreturn)) void wait_for_button_and_reboot(void) {