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Commit 0b5a1b95 authored Oct 06, 2011 by Shawn Guo Committed by Russell King Oct 17, 2011

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>

parent 26a527e6

arch/arm/include/asm/smp.h

+5 −0

Original line number	Diff line number	Diff line
		@@ -32,6 +32,11 @@ 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)
		*/

arch/arm/kernel/smp.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -586,6 +586,11 @@ static void ipi_cpu_stop(unsigned int cpu)
		* Main handler for inter-processor interrupts
		*/
		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);