diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/psci/psci_common.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/lib/psci/psci_common.c b/lib/psci/psci_common.c index 1be37c09..cde86450 100644 --- a/lib/psci/psci_common.c +++ b/lib/psci/psci_common.c @@ -916,6 +916,27 @@ void psci_print_power_domain_map(void) #endif } +/****************************************************************************** + * Return whether any secondaries were powered up with CPU_ON call. A CPU that + * have ever been powered up would have set its MPDIR value to something other + * than PSCI_INVALID_MPIDR. Note that MPDIR isn't reset back to + * PSCI_INVALID_MPIDR when a CPU is powered down later, so the return value is + * meaningful only when called on the primary CPU during early boot. + *****************************************************************************/ +int psci_secondaries_brought_up(void) +{ + int idx, n_valid = 0; + + for (idx = 0; idx < ARRAY_SIZE(psci_cpu_pd_nodes); idx++) { + if (psci_cpu_pd_nodes[idx].mpidr != PSCI_INVALID_MPIDR) + n_valid++; + } + + assert(n_valid); + + return (n_valid > 1); +} + #if ENABLE_PLAT_COMPAT /******************************************************************************* * PSCI Compatibility helper function to return the 'power_state' parameter of |