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Flush `psci_plat_pm_ops` after initialization 

The `psci_plat_pm_ops` global pointer is initialized during cold boot by the
primary CPU and will be accessed by the secondary CPUs before enabling data
cache during warm boot. This patch adds a missing data cache flush of
`psci_plat_psci_ops` after initialization during psci_setup() so that
secondaries can see the updated `psci_plat_psci_ops` pointer.

Fixes ARM-software/tf-issues#424

Change-Id: Id4554800b5646302b944115a33be69507d53cedb
This commit is contained in:
Soby Mathew 2016-09-09 11:33:58 +01:00
parent 99e89377eb
commit 7a3d4bdeef
1 changed files with 7 additions and 0 deletions
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7
lib/psci/psci_setup.c
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@ -238,6 +238,13 @@ int psci_setup(uintptr_t mailbox_ep)
plat_setup_psci_ops(mailbox_ep, &psci_plat_pm_ops);
assert(psci_plat_pm_ops);
/*
* Flush `psci_plat_pm_ops` as it will be accessed by secondary CPUs
* during warm boot before data cache is enabled.
*/
flush_dcache_range((uintptr_t)&psci_plat_pm_ops,
sizeof(psci_plat_pm_ops));
/* Initialize the psci capability */
psci_caps = PSCI_GENERIC_CAP;