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authorAtsushi Nemoto <anemo@mba.ocn.ne.jp>2006-11-02 02:08:36 +0900
committerRalf Baechle <ralf@linux-mips.org>2006-11-30 01:14:46 +0000
commit1603b5aca4f15b34848fb5594d0c7b6333b99144 (patch)
tree79272aa41d6510b7256df62e287676885c3960cf /arch/mips/kernel/irq-rm9000.c
parentc87b6ebaea034c0e0ce86127870cf1511a307b64 (diff)
[MIPS] IRQ cleanups
This is a big irq cleanup patch. * Use set_irq_chip() to register irq_chip. * Initialize .mask, .unmask, .mask_ack field. Functions for these method are already exist in most case. * Do not initialize .startup, .shutdown, .enable, .disable fields if default routines provided by irq_chip_set_defaults() were suitable. * Remove redundant irq_desc initializations. * Remove unnecessary local_irq_save/local_irq_restore, spin_lock. With this cleanup, it would be easy to switch to slightly lightwait irq flow handlers (handle_level_irq(), etc.) instead of __do_IRQ(). Though whole this patch is quite large, changes in each irq_chip are not quite simple. Please review and test on your platform. Thanks. Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/kernel/irq-rm9000.c')
-rw-r--r--arch/mips/kernel/irq-rm9000.c45
1 files changed, 11 insertions, 34 deletions
diff --git a/arch/mips/kernel/irq-rm9000.c b/arch/mips/kernel/irq-rm9000.c
index 62f011ba97a..977538445cf 100644
--- a/arch/mips/kernel/irq-rm9000.c
+++ b/arch/mips/kernel/irq-rm9000.c
@@ -48,15 +48,6 @@ static void rm9k_cpu_irq_disable(unsigned int irq)
local_irq_restore(flags);
}
-static unsigned int rm9k_cpu_irq_startup(unsigned int irq)
-{
- rm9k_cpu_irq_enable(irq);
-
- return 0;
-}
-
-#define rm9k_cpu_irq_shutdown rm9k_cpu_irq_disable
-
/*
* Performance counter interrupts are global on all processors.
*/
@@ -89,16 +80,6 @@ static void rm9k_perfcounter_irq_shutdown(unsigned int irq)
on_each_cpu(local_rm9k_perfcounter_irq_shutdown, (void *) irq, 0, 1);
}
-
-/*
- * While we ack the interrupt interrupts are disabled and thus we don't need
- * to deal with concurrency issues. Same for rm9k_cpu_irq_end.
- */
-static void rm9k_cpu_irq_ack(unsigned int irq)
-{
- mask_rm9k_irq(irq);
-}
-
static void rm9k_cpu_irq_end(unsigned int irq)
{
if (!(irq_desc[irq].status & (IRQ_DISABLED | IRQ_INPROGRESS)))
@@ -107,11 +88,10 @@ static void rm9k_cpu_irq_end(unsigned int irq)
static struct irq_chip rm9k_irq_controller = {
.typename = "RM9000",
- .startup = rm9k_cpu_irq_startup,
- .shutdown = rm9k_cpu_irq_shutdown,
- .enable = rm9k_cpu_irq_enable,
- .disable = rm9k_cpu_irq_disable,
- .ack = rm9k_cpu_irq_ack,
+ .ack = mask_rm9k_irq,
+ .mask = mask_rm9k_irq,
+ .mask_ack = mask_rm9k_irq,
+ .unmask = unmask_rm9k_irq,
.end = rm9k_cpu_irq_end,
};
@@ -119,9 +99,10 @@ static struct irq_chip rm9k_perfcounter_irq = {
.typename = "RM9000",
.startup = rm9k_perfcounter_irq_startup,
.shutdown = rm9k_perfcounter_irq_shutdown,
- .enable = rm9k_cpu_irq_enable,
- .disable = rm9k_cpu_irq_disable,
- .ack = rm9k_cpu_irq_ack,
+ .ack = mask_rm9k_irq,
+ .mask = mask_rm9k_irq,
+ .mask_ack = mask_rm9k_irq,
+ .unmask = unmask_rm9k_irq,
.end = rm9k_cpu_irq_end,
};
@@ -135,15 +116,11 @@ void __init rm9k_cpu_irq_init(int base)
clear_c0_intcontrol(0x0000f000); /* Mask all */
- for (i = base; i < base + 4; i++) {
- irq_desc[i].status = IRQ_DISABLED;
- irq_desc[i].action = NULL;
- irq_desc[i].depth = 1;
- irq_desc[i].chip = &rm9k_irq_controller;
- }
+ for (i = base; i < base + 4; i++)
+ set_irq_chip(i, &rm9k_irq_controller);
rm9000_perfcount_irq = base + 1;
- irq_desc[rm9000_perfcount_irq].chip = &rm9k_perfcounter_irq;
+ set_irq_chip(rm9000_perfcount_irq, &rm9k_perfcounter_irq);
irq_base = base;
}