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Add PubSub events for CPU powerdown/powerup

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The suspend hook is published at the start of a CPU powerdown
operation.  The resume hook is published at the end of a CPU powerup
operation.

Change-Id: I50c05e2dde0d33834095ac41b4fcea4c161bb434
Signed-off-by: Dimitris Papastamos <dimitris.papastamos@arm.com>
This commit is contained in:
Dimitris Papastamos 2017-11-28 15:16:00 +00:00
parent 08e06be819
commit 7593252cee
2 changed files with 12 additions and 0 deletions
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7
include/lib/el3_runtime/pubsub_events.h
View file

@ -17,6 +17,13 @@
*/ */
REGISTER_PUBSUB_EVENT(psci_cpu_on_finish); REGISTER_PUBSUB_EVENT(psci_cpu_on_finish);
/*
* These events are published before/after a CPU has been powered down/up
* via the PSCI CPU SUSPEND API.
*/
REGISTER_PUBSUB_EVENT(psci_suspend_pwrdown_start);
REGISTER_PUBSUB_EVENT(psci_suspend_pwrdown_finish);
#ifdef AARCH64 #ifdef AARCH64
/* /*
* These events are published by the AArch64 context management framework * These events are published by the AArch64 context management framework

5
lib/psci/psci_suspend.c
View file

@ -14,6 +14,7 @@
#include <debug.h> #include <debug.h>
#include <platform.h> #include <platform.h>
#include <pmf.h> #include <pmf.h>
#include <pubsub_events.h>
#include <runtime_instr.h> #include <runtime_instr.h>
#include <stddef.h> #include <stddef.h>
#include "psci_private.h" #include "psci_private.h"
@ -68,6 +69,8 @@ static void psci_suspend_to_pwrdown_start(unsigned int end_pwrlvl,
{ {
unsigned int max_off_lvl = psci_find_max_off_lvl(state_info); unsigned int max_off_lvl = psci_find_max_off_lvl(state_info);
PUBLISH_EVENT(psci_suspend_pwrdown_start);
/* Save PSCI target power level for the suspend finisher handler */ /* Save PSCI target power level for the suspend finisher handler */
psci_set_suspend_pwrlvl(end_pwrlvl); psci_set_suspend_pwrlvl(end_pwrlvl);
@ -308,6 +311,8 @@ void psci_cpu_suspend_finish(unsigned int cpu_idx,
/* Invalidate the suspend level for the cpu */ /* Invalidate the suspend level for the cpu */
psci_set_suspend_pwrlvl(PSCI_INVALID_PWR_LVL); psci_set_suspend_pwrlvl(PSCI_INVALID_PWR_LVL);
PUBLISH_EVENT(psci_suspend_pwrdown_finish);
/* /*
* Generic management: Now we just need to retrieve the * Generic management: Now we just need to retrieve the
* information that we had stashed away during the suspend * information that we had stashed away during the suspend