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| author | Achin Gupta <achin.gupta@arm.com> | 2015-09-07 20:43:27 +0100 |
|---|---|---|
| committer | Achin Gupta <achin.gupta@arm.com> | 2015-09-10 15:16:45 +0100 |
| commit | f1054c93ccf892f79e340e03201d4a25c119831c (patch) | |
| tree | d6cc375ac2ffd0988a9d8db439e6152d8eeb2ff1 /bl32/tsp | |
| parent | 604d5da6f2aa837326d5eda7735c8dac9a127ccd (diff) | |
Pass the target suspend level to SPD suspend hooks
In certain Trusted OS implementations it is a requirement to pass them the
highest power level which will enter a power down state during a PSCI
CPU_SUSPEND or SYSTEM_SUSPEND API invocation. This patch passes this power level
to the SPD in the "max_off_pwrlvl" parameter of the svc_suspend() hook.
Currently, the highest power level which was requested to be placed in a low
power state (retention or power down) is passed to the SPD svc_suspend_finish()
hook. This hook is called after emerging from the low power state. It is more
useful to pass the highest power level which was powered down instead. This
patch does this by changing the semantics of the parameter passed to an SPD's
svc_suspend_finish() hook. The name of the parameter has been changed from
"suspend_level" to "max_off_pwrlvl" as well. Same changes have been made to the
parameter passed to the tsp_cpu_resume_main() function.
NOTE: THIS PATCH CHANGES THE SEMANTICS OF THE EXISTING "svc_suspend_finish()"
API BETWEEN THE PSCI AND SPD/SP IMPLEMENTATIONS. THE LATTER MIGHT NEED
UPDATES TO ENSURE CORRECT BEHAVIOUR.
Change-Id: If3a9d39b13119bbb6281f508a91f78a2f46a8b90
Diffstat (limited to 'bl32/tsp')
| -rw-r--r-- | bl32/tsp/tsp_main.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/bl32/tsp/tsp_main.c b/bl32/tsp/tsp_main.c index b002addf..359b9e16 100644 --- a/bl32/tsp/tsp_main.c +++ b/bl32/tsp/tsp_main.c @@ -251,7 +251,7 @@ tsp_args_t *tsp_cpu_suspend_main(uint64_t arg0, * cpu's architectural state has been restored after wakeup from an earlier psci * cpu_suspend request. ******************************************************************************/ -tsp_args_t *tsp_cpu_resume_main(uint64_t suspend_level, +tsp_args_t *tsp_cpu_resume_main(uint64_t max_off_pwrlvl, uint64_t arg1, uint64_t arg2, uint64_t arg3, @@ -272,8 +272,8 @@ tsp_args_t *tsp_cpu_resume_main(uint64_t suspend_level, #if LOG_LEVEL >= LOG_LEVEL_INFO spin_lock(&console_lock); - INFO("TSP: cpu 0x%lx resumed. suspend level %ld\n", - read_mpidr(), suspend_level); + INFO("TSP: cpu 0x%lx resumed. maximum off power level %ld\n", + read_mpidr(), max_off_pwrlvl); INFO("TSP: cpu 0x%lx: %d smcs, %d erets %d cpu suspend requests\n", read_mpidr(), tsp_stats[linear_id].smc_count, |