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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>
This commit is contained in:
Shawn Guo 2011-10-06 15:18:14 +01:00 committed by Russell King
parent 26a527e69d
commit 0b5a1b95dc
2 changed files with 10 additions and 0 deletions
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5
arch/arm/include/asm/smp.h
View File

@ -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)
*/

5
arch/arm/kernel/smp.c
View File

@ -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);