plat/arm/common/arm_topology.c
/*******************************************************************************
 * This function validates an MPIDR by checking whether it falls within the
 * acceptable bounds. An error code (-1) is returned if an incorrect mpidr
 * is passed.
 ******************************************************************************/
This function validates an MPIDR by checking whether it falls within the
acceptable bounds. An error code (-1) is returned if an incorrect mpidr
is passed.
This function validates an MPIDR by checking whether it falls within the acceptable bounds . An error code ( - 1 ) is returned if an incorrect mpidr is passed .
int arm_check_mpidr(u_register_t mpidr)
{
	unsigned int cluster_id, cpu_id;
	uint64_t valid_mask;
#if ARM_PLAT_MT
	unsigned int pe_id;
	valid_mask = ~(MPIDR_AFFLVL_MASK |
			(MPIDR_AFFLVL_MASK << MPIDR_AFF1_SHIFT) |
			(MPIDR_AFFLVL_MASK << MPIDR_AFF2_SHIFT));
	cluster_id = (mpidr >> MPIDR_AFF2_SHIFT) & MPIDR_AFFLVL_MASK;
	cpu_id = (mpidr >> MPIDR_AFF1_SHIFT) & MPIDR_AFFLVL_MASK;
	pe_id = (mpidr >> MPIDR_AFF0_SHIFT) & MPIDR_AFFLVL_MASK;
#else
	valid_mask = ~(MPIDR_CLUSTER_MASK | MPIDR_CPU_MASK);
	cluster_id = (mpidr >> MPIDR_AFF1_SHIFT) & MPIDR_AFFLVL_MASK;
	cpu_id = (mpidr >> MPIDR_AFF0_SHIFT) & MPIDR_AFFLVL_MASK;
#endif 
	mpidr &= MPIDR_AFFINITY_MASK;
	if (mpidr & valid_mask)
		return -1;
	if (cluster_id >= PLAT_ARM_CLUSTER_COUNT)
		return -1;
	if (cpu_id >= plat_arm_get_cluster_core_count(mpidr))
		return -1;
#if ARM_PLAT_MT
	if (pe_id >= plat_arm_get_cpu_pe_count(mpidr))
		return -1;
#endif 
	return 0;
}
int arm_check_mpidr ( u_register_t mpidr ) { unsigned int cluster_id , cpu_id ; uint64_t valid_mask ; #if ARM_PLAT_MT unsigned int pe_id ; valid_mask = ~ ( MPIDR_AFFLVL_MASK | ( MPIDR_AFFLVL_MASK << MPIDR_AFF1_SHIFT ) | ( MPIDR_AFFLVL_MASK << MPIDR_AFF2_SHIFT ) ) ; cluster_id = ( mpidr >> MPIDR_AFF2_SHIFT ) & MPIDR_AFFLVL_MASK ; cpu_id = ( mpidr >> MPIDR_AFF1_SHIFT ) & MPIDR_AFFLVL_MASK ; pe_id = ( mpidr >> MPIDR_AFF0_SHIFT ) & MPIDR_AFFLVL_MASK ; #else valid_mask = ~ ( MPIDR_CLUSTER_MASK | MPIDR_CPU_MASK ) ; cluster_id = ( mpidr >> MPIDR_AFF1_SHIFT ) & MPIDR_AFFLVL_MASK ; cpu_id = ( mpidr >> MPIDR_AFF0_SHIFT ) & MPIDR_AFFLVL_MASK ; #endif mpidr &= MPIDR_AFFINITY_MASK ; if ( mpidr & valid_mask ) return -1 ; if ( cluster_id >= PLAT_ARM_CLUSTER_COUNT ) return -1 ; if ( cpu_id >= plat_arm_get_cluster_core_count ( mpidr ) ) return -1 ; #if ARM_PLAT_MT if ( pe_id >= plat_arm_get_cpu_pe_count ( mpidr ) ) return -1 ; #endif return 0 ; }
This function validates an MPIDR by checking whether it falls within the
 acceptable bounds.
This function validates an MPIDR by checking whether it falls within the acceptable bounds .
/* ARM_PLAT_MT */ /* Validate cpu_id by checking whether it represents a CPU in
	   one of the two clusters present on the platform. */ /* ARM_PLAT_MT */