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| author | Vikram Kanigiri <vikram.kanigiri@arm.com> | 2014-03-21 11:57:10 +0000 |
|---|---|---|
| committer | Dan Handley <dan.handley@arm.com> | 2014-03-26 17:36:35 +0000 |
| commit | d118f9f864267670fb9cb1790d7d6dd620e0f6ed (patch) | |
| tree | 49ad67bbcdd6ee90fc111fc0f27a9e03fd49b8d1 /plat | |
| parent | 886278e55f3a7e5ab1ba8e12974cf824778c5995 (diff) | |
| download | arm-trusted-firmware-d118f9f864267670fb9cb1790d7d6dd620e0f6ed.tar.gz | |
Add standby state support in PSCI cpu_suspend api
This patch adds support in the generic PSCI implementation to call a
platform specific function to enter a standby state using an example
implementation in ARM FVP port
Fixes ARM-software/tf-issues#94
Change-Id: Ic1263fcf25f28e09162ad29dca954125f9aa8cc9
Diffstat (limited to 'plat')
| -rw-r--r-- | plat/fvp/plat_pm.c | 25 |
1 files changed, 24 insertions, 1 deletions
diff --git a/plat/fvp/plat_pm.c b/plat/fvp/plat_pm.c index dd7a4b3..7b51476 100644 --- a/plat/fvp/plat_pm.c +++ b/plat/fvp/plat_pm.c @@ -44,6 +44,29 @@ #include <psci.h> /******************************************************************************* + * FVP handler called when an affinity instance is about to enter standby. + ******************************************************************************/ +int fvp_affinst_standby(unsigned int power_state) +{ + unsigned int target_afflvl; + + /* Sanity check the requested state */ + target_afflvl = psci_get_pstate_afflvl(power_state); + + /* + * It's possible to enter standby only on affinity level 0 i.e. a cpu + * on the FVP. Ignore any other affinity level. + */ + if (target_afflvl != MPIDR_AFFLVL0) + return PSCI_E_INVALID_PARAMS; + + /* Enter standby state */ + wfi(); + + return PSCI_E_SUCCESS; +} + +/******************************************************************************* * FVP handler called when an affinity instance is about to be turned on. The * level and mpidr determine the affinity instance. ******************************************************************************/ @@ -372,7 +395,7 @@ int fvp_affinst_suspend_finish(unsigned long mpidr, * Export the platform handlers to enable psci to invoke them ******************************************************************************/ static plat_pm_ops fvp_plat_pm_ops = { - 0, + fvp_affinst_standby, fvp_affinst_on, fvp_affinst_off, fvp_affinst_suspend, |