[PATCH v4 2/7] ARM: kernel: update topology to use new MPIDR macros

Lorenzo Pieralisi lorenzo.pieralisi at arm.com
Mon Nov 19 23:45:01 EST 2012


This patch updates the topology initialization code to use the newly
defined accessors to retrieve the MPIDR affinity levels.

Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi at arm.com>
---
 arch/arm/kernel/topology.c | 15 +++++----------
 1 file changed, 5 insertions(+), 10 deletions(-)

diff --git a/arch/arm/kernel/topology.c b/arch/arm/kernel/topology.c
index 4642c7d..cba99bd 100644
--- a/arch/arm/kernel/topology.c
+++ b/arch/arm/kernel/topology.c
@@ -262,19 +262,14 @@ void store_cpu_topology(unsigned int cpuid)
 
 		if (mpidr & MPIDR_MT_BITMASK) {
 			/* core performance interdependency */
-			cpuid_topo->thread_id = (mpidr >> MPIDR_LEVEL0_SHIFT)
-				& MPIDR_LEVEL0_MASK;
-			cpuid_topo->core_id = (mpidr >> MPIDR_LEVEL1_SHIFT)
-				& MPIDR_LEVEL1_MASK;
-			cpuid_topo->socket_id = (mpidr >> MPIDR_LEVEL2_SHIFT)
-				& MPIDR_LEVEL2_MASK;
+			cpuid_topo->thread_id = MPIDR_AFFINITY_LEVEL(mpidr, 0);
+			cpuid_topo->core_id = MPIDR_AFFINITY_LEVEL(mpidr, 1);
+			cpuid_topo->socket_id = MPIDR_AFFINITY_LEVEL(mpidr, 2);
 		} else {
 			/* largely independent cores */
 			cpuid_topo->thread_id = -1;
-			cpuid_topo->core_id = (mpidr >> MPIDR_LEVEL0_SHIFT)
-				& MPIDR_LEVEL0_MASK;
-			cpuid_topo->socket_id = (mpidr >> MPIDR_LEVEL1_SHIFT)
-				& MPIDR_LEVEL1_MASK;
+			cpuid_topo->core_id = MPIDR_AFFINITY_LEVEL(mpidr, 0);
+			cpuid_topo->socket_id = MPIDR_AFFINITY_LEVEL(mpidr, 1);
 		}
 	} else {
 		/*
-- 
1.7.12




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