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Commit 1103643c authored by Shawn Guo's avatar Shawn Guo Committed by Arnd Bergmann
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arm/imx: add gic_handle_irq function 



This is a plain translation of assembly gic irq handler to C function
for CONFIG_MULTI_IRQ_HANDLER support on imx family.

Signed-off-by: default avatarShawn Guo <shawn.guo@linaro.org>
parent bac89d75

arch/arm/plat-mxc/Makefile

+1 −1
Original line number Diff line number Diff line
@@ -5,7 +5,7 @@ 
# Common support

obj-y := clock.o time.o devices.o cpu.o system.o irq-common.o



# MX51 uses the TZIC interrupt controller, older platforms use AVIC

obj-$(CONFIG_ARM_GIC) += gic.o

obj-$(CONFIG_MXC_TZIC) += tzic.o

obj-$(CONFIG_MXC_AVIC) += avic.o

arch/arm/plat-mxc/gic.c

0 → 100644
+48 −0
Original line number Diff line number Diff line 
/*

 * Copyright 2011 Freescale Semiconductor, Inc.

 * Copyright 2011 Linaro Ltd.

 *

 * The code contained herein is licensed under the GNU General Public

 * License. You may obtain a copy of the GNU General Public License

 * Version 2 or later at the following locations:

 *

 * http://www.opensource.org/licenses/gpl-license.html

 * http://www.gnu.org/copyleft/gpl.html

 */



#include <linux/io.h>

#include <asm/exception.h>

#include <asm/localtimer.h>

#include <asm/hardware/gic.h>

#ifdef CONFIG_SMP

#include <asm/smp.h>

#endif



asmlinkage void __exception_irq_entry gic_handle_irq(struct pt_regs *regs)

{

	u32 irqstat, irqnr;



	do {

		irqstat = readl_relaxed(gic_cpu_base_addr + GIC_CPU_INTACK);

		irqnr = irqstat & 0x3ff;

		if (irqnr == 1023)

			break;



		if (irqnr > 29 && irqnr < 1021)

			handle_IRQ(irqnr, regs);

#ifdef CONFIG_SMP

		else if (irqnr < 16) {

			writel_relaxed(irqstat, gic_cpu_base_addr +

						GIC_CPU_EOI);

			handle_IPI(irqnr, regs);

		}

#endif

#ifdef CONFIG_LOCAL_TIMERS

		else if (irqnr == 29) {

			writel_relaxed(irqstat, gic_cpu_base_addr +

						GIC_CPU_EOI);

			handle_local_timer(regs);

		}

#endif

	} while (1);

}

arch/arm/plat-mxc/include/mach/common.h

+2 −0
Original line number Diff line number Diff line
@@ -86,6 +86,7 @@ extern void imx_print_silicon_rev(const char *cpu, int srev); 


void avic_handle_irq(struct pt_regs *);

void tzic_handle_irq(struct pt_regs *);

void gic_handle_irq(struct pt_regs *);



#define imx1_handle_irq avic_handle_irq

#define imx21_handle_irq avic_handle_irq
@@ -96,5 +97,6 @@ void tzic_handle_irq(struct pt_regs *); 
#define imx50_handle_irq tzic_handle_irq

#define imx51_handle_irq tzic_handle_irq

#define imx53_handle_irq tzic_handle_irq

#define imx6q_handle_irq gic_handle_irq



#endif

arch/arm/plat-mxc/include/mach/entry-macro.S

+6 −0
Original line number Diff line number Diff line
@@ -22,3 +22,9 @@ 


	.macro	get_irqnr_and_base, irqnr, irqstat, base, tmp

	.endm



	.macro test_for_ipi, irqnr, irqstat, base, tmp

	.endm



	.macro test_for_ltirq, irqnr, irqstat, base, tmp

	.endm