diff options
Diffstat (limited to 'chip/mec1322/system.c')
| -rw-r--r-- | chip/mec1322/system.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/chip/mec1322/system.c b/chip/mec1322/system.c index 62c08e028d..7425ccc30f 100644 --- a/chip/mec1322/system.c +++ b/chip/mec1322/system.c @@ -22,7 +22,25 @@ enum hibdata_index { HIBDATA_INDEX_SAVED_RESET_FLAGS /* Saved reset flags */ }; +static void check_reset_cause(void) +{ + uint32_t status = MEC1322_VBAT_STS; + uint32_t flags = 0; + + /* Clear the reset causes now that we've read them */ + MEC1322_VBAT_STS |= status; + + if (status & (1 << 7)) + flags |= RESET_FLAG_POWER_ON; + + if (status & (1 << 5)) + flags |= RESET_FLAG_WATCHDOG; + flags |= MEC1322_VBAT_RAM(HIBDATA_INDEX_SAVED_RESET_FLAGS); + MEC1322_VBAT_RAM(HIBDATA_INDEX_SAVED_RESET_FLAGS) = 0; + + system_set_reset_flags(flags); +} void system_pre_init(void) { @@ -31,13 +49,33 @@ void system_pre_init(void) /* Deassert nSIO_RESET */ MEC1322_PCR_PWR_RST_CTL &= ~(1 << 0); + + check_reset_cause(); } void system_reset(int flags) { + uint32_t save_flags = 0; + + /* Disable interrupts to avoid task swaps during reboot */ + interrupt_disable(); + + /* Save current reset reasons if necessary */ + if (flags & SYSTEM_RESET_PRESERVE_FLAGS) + save_flags = system_get_reset_flags() | RESET_FLAG_PRESERVED; + + if (flags & SYSTEM_RESET_LEAVE_AP_OFF) + save_flags |= RESET_FLAG_AP_OFF; + + MEC1322_VBAT_RAM(HIBDATA_INDEX_SAVED_RESET_FLAGS) = save_flags; + /* Trigger watchdog in 1ms */ MEC1322_WDG_LOAD = 1; MEC1322_WDG_CTL |= 1; + + /* Spin and wait for reboot; should never return */ + while (1) + ; } const char *system_get_chip_vendor(void) |