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ARM: 8240/1: MCPM: document mcpm_sync_init()

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Signed-off-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Nicolas Pitre 2014-11-29 03:19:42 +01:00 committed by Russell King
parent 1f92f77ab6
commit 216b4688cc
1 changed files with 17 additions and 0 deletions
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17
arch/arm/include/asm/mcpm.h
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@ -219,6 +219,23 @@ void __mcpm_outbound_leave_critical(unsigned int cluster, int state);
bool __mcpm_outbound_enter_critical(unsigned int this_cpu, unsigned int cluster);
int __mcpm_cluster_state(unsigned int cluster);
/**
* mcpm_sync_init - Initialize the cluster synchronization support
*
* @power_up_setup: platform specific function invoked during very
* early CPU/cluster bringup stage.
*
* This prepares memory used by vlocks and the MCPM state machine used
* across CPUs that may have their caches active or inactive. Must be
* called only after a successful call to mcpm_platform_register().
*
* The power_up_setup argument is a pointer to assembly code called when
* the MMU and caches are still disabled during boot and no stack space is
* available. The affinity level passed to that code corresponds to the
* resource that needs to be initialized (e.g. 1 for cluster level, 0 for
* CPU level). Proper exclusion mechanisms are already activated at that
* point.
*/
int __init mcpm_sync_init(
void (*power_up_setup)(unsigned int affinity_level));