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ARM: pxa: introduce {icip,ichp}_handle_irq() to prepare MULTI_IRQ_HANDLER

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Thanks Dmitry for providing a fix to the original code.

Signed-off-by: Eric Miao <eric.y.miao@gmail.com>
Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
This commit is contained in:
Eric Miao 2011-04-27 22:48:05 +08:00
parent 5d284e353e
commit a551e4f787
2 changed files with 35 additions and 0 deletions
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3
arch/arm/mach-pxa/include/mach/irqs.h
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@ -106,9 +106,12 @@
#ifndef __ASSEMBLY__
struct irq_data;
struct pt_regs;
void pxa_mask_irq(struct irq_data *);
void pxa_unmask_irq(struct irq_data *);
void icip_handle_irq(struct pt_regs *);
void ichp_handle_irq(struct pt_regs *);
#endif
#endif /* __ASM_MACH_IRQS_H */

32
arch/arm/mach-pxa/irq.c
View File

@ -37,6 +37,8 @@
#define IPR(i) (((i) < 32) ? (0x01c + ((i) << 2)) : \
((i) < 64) ? (0x0b0 + (((i) - 32) << 2)) : \
(0x144 + (((i) - 64) << 2)))
#define ICHP_VAL_IRQ (1 << 31)
#define ICHP_IRQ(i) (((i) >> 16) & 0x7fff)
#define IPR_VALID (1 << 31)
#define IRQ_BIT(n) (((n) - PXA_IRQ(0)) & 0x1f)
@ -127,6 +129,36 @@ static struct irq_chip pxa_low_gpio_chip = {
.irq_set_type = pxa_set_low_gpio_type,
};
asmlinkage void __exception_irq_entry icip_handle_irq(struct pt_regs *regs)
{
uint32_t icip, icmr, mask;
do {
icip = __raw_readl(IRQ_BASE + ICIP);
icmr = __raw_readl(IRQ_BASE + ICMR);
mask = icip & icmr;
if (mask == 0)
break;
handle_IRQ(PXA_IRQ(fls(mask) - 1), regs);
} while (1);
}
asmlinkage void __exception_irq_entry ichp_handle_irq(struct pt_regs *regs)
{
uint32_t ichp;
do {
__asm__ __volatile__("mrc p6, 0, %0, c5, c0, 0\n": "=r"(ichp));
if ((ichp & ICHP_VAL_IRQ) == 0)
break;
handle_IRQ(PXA_IRQ(ICHP_IRQ(ichp)), regs);
} while (1);
}
static void __init pxa_init_low_gpio_irq(set_wake_t fn)
{
int irq;