/*===========================================================================*
* shutdown *
*===========================================================================*/
void minix_shutdown(minix_timer_t *tp)
{
/* This function is called from prepare_shutdown or stop_sequence to bring
* down MINIX.
*/
int how;
#ifdef CONFIG_SMP
/*
* FIXME
*
* we will need to stop timers on all cpus if SMP is enabled and put them in
* such a state that we can perform the whole boot process once restarted from
* monitor again
*/
if (ncpus > 1)
smp_shutdown_aps();
#endif
hw_intr_disable_all();
stop_local_timer();
how = tp ? tmr_arg(tp)->ta_int : 0;
/* Show shutdown message */
direct_cls();
if((how & RB_POWERDOWN) == RB_POWERDOWN)
direct_print("MINIX has halted and will now power off.\n");
else if(how & RB_HALT)
direct_print("MINIX has halted. "
"It is safe to turn off your computer.\n");
else
direct_print("MINIX will now reset.\n");
arch_shutdown(how);
}
void
poweroff(void)
{
/*
* The am335x can signal an external power management chip to cut the power
* by toggling the PMIC_POWER_EN pin. It might fail if there isn't an
* external PMIC or if the PMIC hasn't been configured to respond to toggles.
* The only way to pull the pin low is via ALARM2 (see TRM 20.3.3.8).
* At this point PM should have already signaled readclock to set the alarm.
*/
#ifdef AM335X
/* Powers down the SoC within 3 seconds */
direct_print("PMIC Power-Off in 3 Seconds\n");
/* rtc was frozen to prevent premature power-off, unfreeze it now */
omap3_rtc_run();
/* wait for the alarm to go off and PMIC to disable power to SoC */
while (1);
#endif /* AM335X */
/* fallback option: hang */
direct_print("Unable to power-off this device.");
while (1);
}
__dead void arch_shutdown(int how)
{
unsigned char unused_ch;
/* Mask all interrupts, including the clock. */
outb( INT_CTLMASK, ~0);
/* Empty buffer */
while(direct_read_char(&unused_ch))
;
if(kinfo.minix_panicing) {
/* Printing is done synchronously over serial. */
if (kinfo.do_serial_debug)
reset();
/* Print accumulated diagnostics buffer and reset. */
direct_cls();
direct_print("Minix panic. System diagnostics buffer:\n\n");
direct_print(kmess.kmess_buf);
direct_print("\nSystem has panicked, press any key to reboot");
while (!direct_read_char(&unused_ch))
;
reset();
}
switch (how) {
case RBT_HALT:
/* Hang */
for (; ; ) halt_cpu();
NOT_REACHABLE;
case RBT_POWEROFF:
/* Power off if possible, hang otherwise */
poweroff();
NOT_REACHABLE;
default:
case RBT_DEFAULT:
case RBT_REBOOT:
case RBT_RESET:
/* Reset the system by forcing a processor shutdown.
* First stop the BIOS memory test by setting a soft
* reset flag.
*/
reset();
NOT_REACHABLE;
}
NOT_REACHABLE;
}
void
reset(void)
{
bsp_reset(); /* should not exit */
direct_print("Reset not supported.");
while (1);
}
void
reset(void)
{
omap3_reset();
direct_print("Reset not supported.");
while (1);
}
void
poweroff(void)
{
bsp_poweroff();
/* fallback option: hang */
direct_print("Unable to power-off this device.");
while (1);
}
/*===========================================================================*
* shutdown *
*===========================================================================*/
void minix_shutdown(timer_t *tp)
{
/* This function is called from prepare_shutdown or stop_sequence to bring
* down MINIX. How to shutdown is in the argument: RBT_HALT (return to the
* monitor), RBT_RESET (hard reset).
*/
int how;
#ifdef CONFIG_SMP
/*
* FIXME
*
* we will need to stop timers on all cpus if SMP is enabled and put them in
* such a state that we can perform the whole boot process once restarted from
* monitor again
*/
if (ncpus > 1)
smp_shutdown_aps();
#endif
hw_intr_disable_all();
stop_local_timer();
how = tp ? tmr_arg(tp)->ta_int : RBT_PANIC;
/* Show shutdown message */
direct_cls();
switch(how) {
case RBT_HALT:
direct_print("MINIX has halted. "
"It is safe to turn off your computer.\n");
break;
case RBT_POWEROFF:
direct_print("MINIX has halted and will now power off.\n");
break;
case RBT_DEFAULT:
case RBT_REBOOT:
case RBT_RESET:
default:
direct_print("MINIX will now reset.\n");
break;
}
arch_shutdown(how);
}
