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PSCI: Build option to enable D-Caches early in warmboot

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This patch introduces a build option to enable D-cache early on the CPU
after warm boot. This is applicable for platforms which do not require
interconnect programming to enable cache coherency (eg: single cluster
platforms). If this option is enabled, then warm boot path enables
D-caches immediately after enabling MMU.

Fixes ARM-Software/tf-issues#456

Change-Id: I44c8787d116d7217837ced3bcf0b1d3441c8d80e
Signed-off-by: Soby Mathew <soby.mathew@arm.com>
This commit is contained in:
Soby Mathew 2017-04-10 22:35:42 +01:00
parent 9423f8eca7
commit bcc3c49c90
7 changed files with 50 additions and 31 deletions
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2
lib/psci/psci_suspend.c
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@ -302,7 +302,7 @@ void psci_cpu_suspend_finish(unsigned int cpu_idx,
*/
psci_plat_pm_ops->pwr_domain_suspend_finish(state_info);
#if !HW_ASSISTED_COHERENCY
#if !(HW_ASSISTED_COHERENCY || WARMBOOT_ENABLE_DCACHE_EARLY)
/* Arch. management: Enable the data cache, stack memory maintenance. */
psci_do_pwrup_cache_maintenance();
#endif