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power: Fix x86 wake up sequence

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When waking up from C2LP state, the timer needs
to be reinitialized as we cannot know the time
that we spent in that state.
In order to reschedule the user application, expire it
as soon as we restart.

Change-Id: Id38a0de71e148ae8d9024a36d3983ab57b1e40d2
Signed-off-by: Julien Delayen <julien.delayen@intel.com>
This commit is contained in:
Julien Delayen 2016-11-08 14:21:03 +00:00 • committed by Anas Nashif
commit 6e71f1f6a3
1 changed files with 17 additions and 4 deletions
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21
arch/x86/soc/intel_quark/quark_se/power.c
View file

@ -22,6 +22,9 @@
#include "power_states.h"
#define _REG_TIMER_ICR ((volatile uint32_t *) \
(CONFIG_LOAPIC_BASE_ADDRESS + LOAPIC_TIMER_ICR))
/* Variables used to save CPU state */
uint64_t _pm_save_gdtr;
uint64_t _pm_save_idtr;
@ -89,9 +92,19 @@ void _sys_soc_set_power_state(enum power_states state)
void _sys_soc_power_state_post_ops(enum power_states state)
{
if (state == SYS_POWER_STATE_CPU_LPS_2) {
return;
switch (state) {
case SYS_POWER_STATE_CPU_LPS:
*_REG_TIMER_ICR = 1;
case SYS_POWER_STATE_CPU_LPS_1:
__asm__ volatile("sti");
break;
#if (defined(CONFIG_SYS_POWER_DEEP_SLEEP))
case SYS_POWER_STATE_DEEP_SLEEP:
case SYS_POWER_STATE_DEEP_SLEEP_1:
__asm__ volatile("sti");
break;
#endif
default:
break;
}
__asm__ volatile("sti");
}