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-rw-r--r--arch/arm/Kconfig5
-rw-r--r--arch/arm/include/asm/mach/arch.h3
-rw-r--r--arch/arm/include/asm/mach/irq.h4
-rw-r--r--arch/arm/kernel/entry-armv.S17
-rw-r--r--arch/arm/kernel/setup.c3
5 files changed, 30 insertions, 2 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index fd0e21be5e44..47694865018c 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1022,6 +1022,11 @@ config CPU_HAS_PMU
default y
bool
+config MULTI_IRQ_HANDLER
+ bool
+ help
+ Allow each machine to specify it's own IRQ handler at run time.
+
if !MMU
source "arch/arm/Kconfig-nommu"
endif
diff --git a/arch/arm/include/asm/mach/arch.h b/arch/arm/include/asm/mach/arch.h
index d97a964207fa..7d55356110d4 100644
--- a/arch/arm/include/asm/mach/arch.h
+++ b/arch/arm/include/asm/mach/arch.h
@@ -40,6 +40,9 @@ struct machine_desc {
void (*init_irq)(void);
struct sys_timer *timer; /* system tick timer */
void (*init_machine)(void);
+#ifdef CONFIG_MULTI_IRQ_HANDLER
+ void (*handle_irq)(struct pt_regs *);
+#endif
};
/*
diff --git a/arch/arm/include/asm/mach/irq.h b/arch/arm/include/asm/mach/irq.h
index ce3eee9fe26c..6ecdad9a5c42 100644
--- a/arch/arm/include/asm/mach/irq.h
+++ b/arch/arm/include/asm/mach/irq.h
@@ -22,6 +22,10 @@ extern void (*init_arch_irq)(void);
extern void init_FIQ(void);
extern int show_fiq_list(struct seq_file *, void *);
+#ifdef CONFIG_MULTI_IRQ_HANDLER
+extern void (*handle_arch_irq)(struct pt_regs *);
+#endif
+
/*
* This is for easy migration, but should be changed in the source
*/
diff --git a/arch/arm/kernel/entry-armv.S b/arch/arm/kernel/entry-armv.S
index 35f3f20d6731..caa6c396ec78 100644
--- a/arch/arm/kernel/entry-armv.S
+++ b/arch/arm/kernel/entry-armv.S
@@ -30,6 +30,14 @@
* Interrupt handling. Preserves r7, r8, r9
*/
.macro irq_handler
+#ifdef CONFIG_MULTI_IRQ_HANDLER
+ ldr r5, =handle_arch_irq
+ mov r0, sp
+ ldr r5, [r5]
+ adr lr, BSYM(9997f)
+ teq r5, #0
+ movne pc, r5
+#endif
get_irqnr_preamble r5, lr
1: get_irqnr_and_base r0, r6, r5, lr
movne r1, sp
@@ -58,9 +66,8 @@
adrne lr, BSYM(1b)
bne do_local_timer
#endif
-9997:
#endif
-
+9997:
.endm
#ifdef CONFIG_KPROBES
@@ -1245,3 +1252,9 @@ cr_alignment:
.space 4
cr_no_alignment:
.space 4
+
+#ifdef CONFIG_MULTI_IRQ_HANDLER
+ .globl handle_arch_irq
+handle_arch_irq:
+ .space 4
+#endif
diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c
index 8075e592f902..0826f36330c4 100644
--- a/arch/arm/kernel/setup.c
+++ b/arch/arm/kernel/setup.c
@@ -875,6 +875,9 @@ void __init setup_arch(char **cmdline_p)
init_arch_irq = mdesc->init_irq;
system_timer = mdesc->timer;
init_machine = mdesc->init_machine;
+#ifdef CONFIG_MULTI_IRQ_HANDLER
+ handle_arch_irq = mdesc->handle_irq;
+#endif
#ifdef CONFIG_VT
#if defined(CONFIG_VGA_CONSOLE)
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