From: Dave.Martin@arm.com (Dave Martin)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v3 1/3] ARM: mcpm: Factor out logical-to-physical CPU translation
Date: Tue, 1 Oct 2013 18:15:16 +0100 [thread overview]
Message-ID: <1380647718-9178-2-git-send-email-Dave.Martin@arm.com> (raw)
In-Reply-To: <1380647718-9178-1-git-send-email-Dave.Martin@arm.com>
This patch factors the logical-to-physical CPU translation out of
mcpm_boot_secondary(), so that it can be reused elsewhere.
Signed-off-by: Dave Martin <Dave.Martin@arm.com>
Acked-by: Nicolas Pitre <nico@linaro.org>
---
arch/arm/common/mcpm_platsmp.c | 17 +++++++++++++----
1 file changed, 13 insertions(+), 4 deletions(-)
diff --git a/arch/arm/common/mcpm_platsmp.c b/arch/arm/common/mcpm_platsmp.c
index 1bc34c7..c0c3cd7 100644
--- a/arch/arm/common/mcpm_platsmp.c
+++ b/arch/arm/common/mcpm_platsmp.c
@@ -19,14 +19,23 @@
#include <asm/smp.h>
#include <asm/smp_plat.h>
+static void cpu_to_pcpu(unsigned int cpu,
+ unsigned int *pcpu, unsigned int *pcluster)
+{
+ unsigned int mpidr;
+
+ mpidr = cpu_logical_map(cpu);
+ *pcpu = MPIDR_AFFINITY_LEVEL(mpidr, 0);
+ *pcluster = MPIDR_AFFINITY_LEVEL(mpidr, 1);
+}
+
static int mcpm_boot_secondary(unsigned int cpu, struct task_struct *idle)
{
- unsigned int mpidr, pcpu, pcluster, ret;
+ unsigned int pcpu, pcluster, ret;
extern void secondary_startup(void);
- mpidr = cpu_logical_map(cpu);
- pcpu = MPIDR_AFFINITY_LEVEL(mpidr, 0);
- pcluster = MPIDR_AFFINITY_LEVEL(mpidr, 1);
+ cpu_to_pcpu(cpu, &pcpu, &pcluster);
+
pr_debug("%s: logical CPU %d is physical CPU %d cluster %d\n",
__func__, cpu, pcpu, pcluster);
--
1.7.9.5
next prev parent reply other threads:[~2013-10-01 17:15 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-10-01 17:15 [PATCH v3 0/3] MCPM/TC2 support for CPU powerdown synchronisation Dave Martin
2013-10-01 17:15 ` Dave Martin [this message]
2013-10-01 17:15 ` [PATCH v3 2/3] ARM: mcpm: Implement cpu_kill() to synchronise on powerdown Dave Martin
2013-10-01 17:35 ` Nicolas Pitre
2013-10-01 18:12 ` Dave Martin
2013-10-01 18:34 ` Nicolas Pitre
2013-10-01 17:15 ` [PATCH v3 3/3] ARM: vexpress/TC2: Implement MCPM power_down_finish() Dave Martin
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