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MIPS: Provide fallback reboot/poweroff/halt implementations

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If a machine-specific hook is not implemented for restart, poweroff,
or halt, fall back to halting secondary CPUs, disabling interrupts,
and spinning.  In the case of restart, attempt to restart the system
via do_kernel_restart() (which will call any registered restart
handlers) before halting.

Signed-off-by: Andrew Bresticker <abrestic@chromium.org>
Cc: James Hogan <james.hogan@imgtec.com>
Cc: Maciej W. Rozycki <macro@linux-mips.org>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/9600/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Andrew Bresticker 2015-03-25 10:25:44 -07:00 committed by Ralf Baechle
parent ea925a72a2
commit f45e388ff0
1 changed files with 25 additions and 0 deletions
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25
arch/mips/kernel/reset.c
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@ -11,6 +11,7 @@
#include <linux/pm.h>
#include <linux/types.h>
#include <linux/reboot.h>
#include <linux/delay.h>
#include <asm/reboot.h>
@ -29,16 +30,40 @@ void machine_restart(char *command)
{
if (_machine_restart)
_machine_restart(command);
#ifdef CONFIG_SMP
preempt_disable();
smp_send_stop();
#endif
do_kernel_restart(command);
mdelay(1000);
pr_emerg("Reboot failed -- System halted\n");
local_irq_disable();
while (1);
}
void machine_halt(void)
{
if (_machine_halt)
_machine_halt();
#ifdef CONFIG_SMP
preempt_disable();
smp_send_stop();
#endif
local_irq_disable();
while (1);
}
void machine_power_off(void)
{
if (pm_power_off)
pm_power_off();
#ifdef CONFIG_SMP
preempt_disable();
smp_send_stop();
#endif
local_irq_disable();
while (1);
}