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Merge pull request #967 from miek/fix_m0_copy

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Copy M0 image directly from ROM, instead of shadow region.
This commit is contained in:
Michael Ossmann
2021-10-13 10:25:08 -06:00
committed by GitHub
parent ac0983fadf 7f21c93c33
commit b293750691
2 changed files with 16 additions and 9 deletions
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2
firmware/common/LPC43xx_M4_M0_image_from_text.ld
View File

@ -22,7 +22,7 @@
SECTIONS
{
.text : {
.m0_text : {
PROVIDE(__m0_start__ = .);
KEEP(*(.m0_bin*));
. = ALIGN(4);

23
firmware/hackrf_usb/hackrf_usb.c
View File

@ -21,6 +21,7 @@
*/
#include <stddef.h>
#include <string.h>
#include <libopencm3/lpc43xx/ipc.h>
#include <libopencm3/lpc43xx/m4/nvic.h>
@ -56,6 +57,7 @@
extern uint32_t __m0_start__;
extern uint32_t __m0_end__;
extern uint32_t __ram_m0_start__;
extern uint32_t _etext_ram, _text_ram, _etext_rom;
static usb_request_handler_fn vendor_request_handler[] = {
NULL,
@ -188,16 +190,21 @@ static bool cpld_jtag_sram_load(jtag_t* const jtag) {
static void m0_rom_to_ram() {
uint32_t *dest = &__ram_m0_start__;
uint32_t *src = &__m0_start__;
while (src < &__m0_end__) {
*dest = *src;
dest++;
src++;
}
// Calculate the base address of ROM
uint32_t base = (uint32_t)(&_etext_rom - (&_etext_ram - &_text_ram));
// M0 image location, relative to the start of ROM
uint32_t src = (uint32_t)&__m0_start__;
uint32_t len = (uint32_t)&__m0_end__ - (uint32_t)src;
memcpy(dest, (uint32_t*)(base + src), len);
}
int main(void) {
bool operacake_allow_gpio;
// Copy M0 image from ROM before SPIFI is disabled
m0_rom_to_ram();
pin_setup();
enable_1v8_power();
#if (defined HACKRF_ONE || defined RAD1O)
@ -209,7 +216,6 @@ int main(void) {
cpu_clock_init();
/* Wake the M0 */
m0_rom_to_ram();
ipc_start_m0((uint32_t)&__ram_m0_start__);
if( !cpld_jtag_sram_load(&jtag_cpld) ) {
@ -245,6 +251,7 @@ int main(void) {
rf_path_init(&rf_path);
bool operacake_allow_gpio;
if( hackrf_ui()->operacake_gpio_compatible() ) {
operacake_allow_gpio = true;
} else {