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authorShawn Guo <shawn.guo@linaro.org>2011-10-06 15:18:14 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2011-10-17 09:02:43 +0100
commit0b5a1b95dcdfa451125132d5ce3f79a27ffb0950 (patch)
tree0a2ae9da15b1a9789bf3cc3ccff37b961dacfc1b
parent26a527e69d6e6077bff9e2cddcb08337ac33a52d (diff)
ARM: 7123/1: smp: Add an IPI handler callable from C code
In order to be able to handle IPI directly from C code instead of assembly code, introduce handle_IPI(), which is modeled after handle_IRQ(). Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
-rw-r--r--arch/arm/include/asm/smp.h5
-rw-r--r--arch/arm/kernel/smp.c5
2 files changed, 10 insertions, 0 deletions
diff --git a/arch/arm/include/asm/smp.h b/arch/arm/include/asm/smp.h
index 674ebcd337fe..0a17b62538c2 100644
--- a/arch/arm/include/asm/smp.h
+++ b/arch/arm/include/asm/smp.h
@@ -33,6 +33,11 @@ extern void show_ipi_list(struct seq_file *, int);
asmlinkage void do_IPI(int ipinr, struct pt_regs *regs);
/*
+ * Called from C code, this handles an IPI.
+ */
+void handle_IPI(int ipinr, struct pt_regs *regs);
+
+/*
* Setup the set of possible CPUs (via set_cpu_possible)
*/
extern void smp_init_cpus(void);
diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c
index 3f12ce9b0796..2e49f1883fe9 100644
--- a/arch/arm/kernel/smp.c
+++ b/arch/arm/kernel/smp.c
@@ -587,6 +587,11 @@ static void ipi_cpu_stop(unsigned int cpu)
*/
asmlinkage void __exception_irq_entry do_IPI(int ipinr, struct pt_regs *regs)
{
+ handle_IPI(ipinr, regs);
+}
+
+void handle_IPI(int ipinr, struct pt_regs *regs)
+{
unsigned int cpu = smp_processor_id();
struct pt_regs *old_regs = set_irq_regs(regs);