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ARM: rpc: make default fiq handler run-time installed

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Only rpc uses disable_fiq macro. Change it to a run-time installed
default FIQ handler. The handler is installed before FIQ is enabled
so the behavior should be unchanged.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Acked-by: Nicolas Pitre <nico@linaro.org>
This commit is contained in:
Rob Herring 2012-02-08 18:24:23 -06:00
parent 13a5045d4e
commit 78cbaaca69
3 changed files with 23 additions and 1 deletions
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2
arch/arm/mach-rpc/Makefile
View File

@ -4,7 +4,7 @@
# Object file lists.
obj-y := dma.o irq.o riscpc.o
obj-y := dma.o fiq.o irq.o riscpc.o
obj-m :=
obj-n :=
obj- :=

16
arch/arm/mach-rpc/fiq.S Normal file
View File

@ -0,0 +1,16 @@
#include <linux/linkage.h>
#include <asm/assembler.h>
#include <mach/hardware.h>
#include <mach/entry-macro.S>
.text
.global rpc_default_fiq_end
ENTRY(rpc_default_fiq_start)
mov r12, #ioc_base_high
.if ioc_base_low
orr r12, r12, #ioc_base_low
.endif
strb r12, [r12, #0x38] @ Disable FIQ register
subs pc, lr, #4
rpc_default_fiq_end:

6
arch/arm/mach-rpc/irq.c
View File

@ -5,6 +5,7 @@
#include <asm/mach/irq.h>
#include <asm/hardware/iomd.h>
#include <asm/irq.h>
#include <asm/fiq.h>
static void iomd_ack_irq_a(struct irq_data *d)
{
@ -112,6 +113,8 @@ static struct irq_chip iomd_fiq_chip = {
.irq_unmask = iomd_unmask_irq_fiq,
};
extern unsigned char rpc_default_fiq_start, rpc_default_fiq_end;
void __init rpc_init_irq(void)
{
unsigned int irq, flags;
@ -121,6 +124,9 @@ void __init rpc_init_irq(void)
iomd_writeb(0, IOMD_FIQMASK);
iomd_writeb(0, IOMD_DMAMASK);
set_fiq_handler(&rpc_default_fiq_start,
&rpc_default_fiq_end - &rpc_default_fiq_start);
for (irq = 0; irq < NR_IRQS; irq++) {
flags = IRQF_VALID;