From 20cf33ea16253b9eed387cba022cb014563db40e Mon Sep 17 00:00:00 2001
From: Russell King <rmk@dyn-67.arm.linux.org.uk>
Date: Sat, 18 Jun 2005 10:15:46 +0100
Subject: [PATCH] [PATCH] ARM SMP: Add basic support Integrator/CP platform
Add basic SMP support for the Integrator/CP platform.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
arch/arm/mach-integrator/Makefile | 1 +
arch/arm/mach-integrator/core.c | 20 +++++++++++++++++++-
arch/arm/mach-integrator/leds.c | 4 +++-
3 files changed, 23 insertions(+), 2 deletions(-)
diff --git a/arch/arm/mach-integrator/Makefile b/arch/arm/mach-integrator/Makefile
index 158daaf9e3b03..ebb255bdce8aa 100644
--- a/arch/arm/mach-integrator/Makefile
+++ b/arch/arm/mach-integrator/Makefile
@@ -12,3 +12,4 @@ obj-$(CONFIG_LEDS) += leds.o
obj-$(CONFIG_PCI) += pci_v3.o pci.o
obj-$(CONFIG_CPU_FREQ_INTEGRATOR) += cpu.o
obj-$(CONFIG_INTEGRATOR_IMPD1) += impd1.o
+obj-$(CONFIG_SMP) += platsmp.o headsmp.o
diff --git a/arch/arm/mach-integrator/core.c b/arch/arm/mach-integrator/core.c
index bd17b5154311f..d302f0405fd2f 100644
--- a/arch/arm/mach-integrator/core.c
+++ b/arch/arm/mach-integrator/core.c
@@ -14,6 +14,7 @@
#include <linux/spinlock.h>
#include <linux/interrupt.h>
#include <linux/sched.h>
+#include <linux/smp.h>
#include <asm/hardware.h>
#include <asm/irq.h>
@@ -221,7 +222,24 @@ integrator_timer_interrupt(int irq, void *dev_id, struct pt_regs *regs)
*/
timer1->TimerClear = 1;
- timer_tick(regs);
+ /*
+ * the clock tick routines are only processed on the
+ * primary CPU
+ */
+ if (hard_smp_processor_id() == 0) {
+ nmi_tick();
+ timer_tick(regs);
+#ifdef CONFIG_SMP
+ smp_send_timer();
+#endif
+ }
+
+#ifdef CONFIG_SMP
+ /*
+ * this is the ARM equivalent of the APIC timer interrupt
+ */
+ update_process_times(user_mode(regs));
+#endif /* CONFIG_SMP */
write_sequnlock(&xtime_lock);
diff --git a/arch/arm/mach-integrator/leds.c b/arch/arm/mach-integrator/leds.c
index d2c0ab21150c1..f1436e683b493 100644
--- a/arch/arm/mach-integrator/leds.c
+++ b/arch/arm/mach-integrator/leds.c
@@ -22,6 +22,8 @@
*/
#include <linux/kernel.h>
#include <linux/init.h>
+#include <linux/smp.h>
+#include <linux/spinlock.h>
#include <asm/hardware.h>
#include <asm/io.h>
@@ -85,4 +87,4 @@ static int __init leds_init(void)
return 0;
}
-__initcall(leds_init);
+core_initcall(leds_init);
--
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