plat/nvidia/tegra/common/tegra_topology.c
/*******************************************************************************
 * This function implements a part of the critical interface between the psci
 * generic layer and the platform that allows the former to query the platform
 * to convert an MPIDR to a unique linear index. An error code (-1) is returned
 * in case the MPIDR is invalid.
 ******************************************************************************/
This function implements a part of the critical interface between the psci
generic layer and the platform that allows the former to query the platform
to convert an MPIDR to a unique linear index. An error code (-1) is returned
in case the MPIDR is invalid.
This function implements a part of the critical interface between the psci generic layer and the platform that allows the former to query the platform to convert an MPIDR to a unique linear index . An error code ( - 1 ) is returned in case the MPIDR is invalid .
int32_t plat_core_pos_by_mpidr(u_register_t mpidr)
{
	u_register_t cluster_id, cpu_id;
	int32_t result;
	cluster_id = (mpidr >> (u_register_t)MPIDR_AFF1_SHIFT) &
		     (u_register_t)MPIDR_AFFLVL_MASK;
	cpu_id = (mpidr >> (u_register_t)MPIDR_AFF0_SHIFT) &
		 (u_register_t)MPIDR_AFFLVL_MASK;
	result = (int32_t)cpu_id + ((int32_t)cluster_id *
		 PLATFORM_MAX_CPUS_PER_CLUSTER);
	if (cluster_id >= (u_register_t)PLATFORM_CLUSTER_COUNT) {
		result = PSCI_E_NOT_PRESENT;
	}
	if (cpu_id >= (u_register_t)PLATFORM_MAX_CPUS_PER_CLUSTER) {
		result = PSCI_E_NOT_PRESENT;
	}
	return result;
}
int32_t plat_core_pos_by_mpidr ( u_register_t mpidr ) { u_register_t cluster_id , cpu_id ; int32_t result ; cluster_id = ( mpidr >> ( u_register_t ) MPIDR_AFF1_SHIFT ) & ( u_register_t ) MPIDR_AFFLVL_MASK ; cpu_id = ( mpidr >> ( u_register_t ) MPIDR_AFF0_SHIFT ) & ( u_register_t ) MPIDR_AFFLVL_MASK ; result = ( int32_t ) cpu_id + ( ( int32_t ) cluster_id * PLATFORM_MAX_CPUS_PER_CLUSTER ) ; if ( cluster_id >= ( u_register_t ) PLATFORM_CLUSTER_COUNT ) { result = PSCI_E_NOT_PRESENT ; } if ( cpu_id >= ( u_register_t ) PLATFORM_MAX_CPUS_PER_CLUSTER ) { result = PSCI_E_NOT_PRESENT ; } return result ; }
This function implements a part of the critical interface between the psci
 generic layer and the platform that allows the former to query the platform
 to convert an MPIDR to a unique linear index.
This function implements a part of the critical interface between the psci generic layer and the platform that allows the former to query the platform to convert an MPIDR to a unique linear index .
/* CorePos = CoreId + (ClusterId * cpus per cluster) */ /*
	 * Validate cpu_id by checking whether it represents a CPU in
	 * one of the two clusters present on the platform.
	 */