int wait_for_mailbox_ack(uint32_t wval, int peer) {
int rc;
uint32_t val = 0;
do {
rc = chip_unipro_attr_read(MBOX_ACK_ATTR, &val, 0, peer);
} while (!rc && val != wval);
if (rc) {
return rc;
}
val = 0;
chip_unipro_attr_write(MBOX_ACK_ATTR, val, 0, peer);
return 0;
}
/**
* @brief control boot behavior
* @param boot_from_spi
* This function has to be called before second stage loader overrides the
* DME_ARA_INIT_STATUS
*/
static void boot_control(bool *boot_from_spi) {
uint32_t boot_status = INIT_STATUS_OPERATING;
uint32_t prev_boot_status;
uint32_t bootctrl;
int rc;
*boot_from_spi = false;
prev_boot_status = chip_get_boot_status();
rc = chip_unipro_attr_read(DME_ARA_BOOT_CONTROL,
&bootctrl,
0,
ATTR_LOCAL);
if (rc) {
halt_and_catch_fire(boot_status);
}
if (prev_boot_status & INIT_STATUS_FAILED) {
/**
* We are in second stage loader at this moment, so the boot status
* should never been "FAILED".
* The check here is just for safety.
**/
halt_and_catch_fire(boot_status);
}
prev_boot_status &= INIT_STATUS_STATUS_MASK;
if (prev_boot_status == INIT_STATUS_TRUSTED_SPI_FLASH_BOOT_FINISHED ||
prev_boot_status == INIT_STATUS_UNTRUSTED_SPI_FLASH_BOOT_FINISHED) {
*boot_from_spi = true;
}
if (bootctrl & FORCE_UNIPRO_BOOT) {
*boot_from_spi = false;
}
}