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| author | danh-arm <dan.handley@arm.com> | 2016-10-17 12:19:20 +0100 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2016-10-17 12:19:20 +0100 |
| commit | 66b4542a5fa465edda55a4a7862ed1be7b99b02e (patch) | |
| tree | 6570927431fe2eefba436d97f63ede6c11f0521a /lib/psci/psci_suspend.c | |
| parent | 5cab1a4a18f4dfb0dfbc23377e5046e7f2a9b956 (diff) | |
| parent | 872be88a2916f45d3de38120ede8c8b199b7498f (diff) | |
Merge pull request #729 from dp-arm/dp/arm-sip
Add instrumentation support for PSCI
Diffstat (limited to 'lib/psci/psci_suspend.c')
| -rw-r--r-- | lib/psci/psci_suspend.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/lib/psci/psci_suspend.c b/lib/psci/psci_suspend.c index 0887e3b2..10d2481d 100644 --- a/lib/psci/psci_suspend.c +++ b/lib/psci/psci_suspend.c @@ -37,6 +37,8 @@ #include <cpu_data.h> #include <debug.h> #include <platform.h> +#include <pmf.h> +#include <runtime_instr.h> #include <stddef.h> #include "psci_private.h" @@ -212,6 +214,19 @@ exit: return; if (is_power_down_state) { +#if ENABLE_RUNTIME_INSTRUMENTATION + + /* + * Update the timestamp with cache off. We assume this + * timestamp can only be read from the current CPU and the + * timestamp cache line will be flushed before return to + * normal world on wakeup. + */ + PMF_CAPTURE_TIMESTAMP(rt_instr_svc, + RT_INSTR_ENTER_HW_LOW_PWR, + PMF_NO_CACHE_MAINT); +#endif + /* The function calls below must not return */ if (psci_plat_pm_ops->pwr_domain_pwr_down_wfi) psci_plat_pm_ops->pwr_domain_pwr_down_wfi(state_info); @@ -219,6 +234,12 @@ exit: psci_power_down_wfi(); } +#if ENABLE_RUNTIME_INSTRUMENTATION + PMF_CAPTURE_TIMESTAMP(rt_instr_svc, + RT_INSTR_ENTER_HW_LOW_PWR, + PMF_NO_CACHE_MAINT); +#endif + /* * We will reach here if only retention/standby states have been * requested at multiple power levels. This means that the cpu @@ -226,6 +247,12 @@ exit: */ wfi(); +#if ENABLE_RUNTIME_INSTRUMENTATION + PMF_CAPTURE_TIMESTAMP(rt_instr_svc, + RT_INSTR_EXIT_HW_LOW_PWR, + PMF_NO_CACHE_MAINT); +#endif + /* * After we wake up from context retaining suspend, call the * context retaining suspend finisher. |