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

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));