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Clear bss on bootloader start.

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This fixes a bug with the USB device serial number sometimes not working in bootloader mode.
This commit is contained in:
nvx 2023-12-14 20:33:00 +10:00
commit d3a90a5da3
2 changed files with 6 additions and 1 deletions
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6
bootrom/bootrom.c
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@ -30,7 +30,7 @@
common_area_t g_common_area __attribute__((section(".commonarea")));
uint32_t start_addr, end_addr;
bool bootrom_unlocked;
extern uint32_t _bootrom_start[], _bootrom_end[], _flash_start[], _flash_end[], _osimage_entry[];
extern uint32_t _bootrom_start[], _bootrom_end[], _flash_start[], _flash_end[], _osimage_entry[], __bss_start__[], __bss_end__[];
static int reply_old(uint64_t cmd, uint64_t arg0, uint64_t arg1, uint64_t arg2, void *data, size_t len) {
PacketResponseOLD txcmd;
@ -268,6 +268,10 @@ static void flash_mode(void) {
void BootROM(void);
void BootROM(void) {
/* Set up (that is: clear) BSS. */
uint32_t *bss_dst = __bss_start__;
while (bss_dst < __bss_end__) *bss_dst++ = 0;
//------------
// First set up all the I/O pins; GPIOs configured directly, other ones
// just need to be assigned to the appropriate peripheral.