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ARM: arm920/s3c24xx: IRQ demulitplexer callback

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This patch adds a IRQ demultiplexer callback to the arm920 cpu core code,
plus a stub implementation of it for the S3C2410.

The purpose is to allow arm920t implementations such as the s3c24x0 to
implement interrupt handlers in u-boot without having to touch core
arm920t code.

Signed-off-by: Harald Welte <laforge@openmoko.org>
This commit is contained in:
Harald Welte 2007-12-19 14:19:38 +01:00 committed by Wolfgang Denk
parent a41dbbd98d
commit be19bd5cd0
3 changed files with 17 additions and 1 deletions
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7
cpu/arm920t/interrupts.c
View File

@ -161,11 +161,16 @@ void do_fiq (struct pt_regs *pt_regs)
void do_irq (struct pt_regs *pt_regs)
{
#if defined (CONFIG_USE_IRQ) && defined (CONFIG_ARCH_INTEGRATOR)
#if defined (CONFIG_USE_IRQ)
#if defined (ARM920_IRQ_CALLBACK)
ARM920_IRQ_CALLBACK();
return;
#elif defined (CONFIG_ARCH_INTEGRATOR)
/* ASSUMED to be a timer interrupt */
/* Just clear it - count handled in */
/* integratorap.c */
*(volatile ulong *)(CFG_TIMERBASE + 0x0C) = 0;
#endif /* ARCH_INTEGRATOR */
#else
printf ("interrupt request\n");
show_regs (pt_regs);

9
cpu/arm920t/s3c24x0/interrupts.c
View File

@ -216,4 +216,13 @@ void reset_cpu (ulong ignored)
/*NOTREACHED*/
}
#ifdef CONFIG_USE_IRQ
void s3c2410_irq(void)
{
S3C24X0_INTERRUPT * irq = S3C24X0_GetBase_INTERRUPT();
u_int32_t intpnd = irq->INTPND;
}
#endif /* USE_IRQ */
#endif /* defined(CONFIG_S3C2400) || defined (CONFIG_S3C2410) || defined (CONFIG_TRAB) */

2
include/common.h
View File

@ -479,6 +479,8 @@ ulong get_OPB_freq (void);
ulong get_PCI_freq (void);
#endif
#if defined(CONFIG_S3C2400) || defined(CONFIG_S3C2410) || defined(CONFIG_LH7A40X)
void s3c2410_irq(void);
#define ARM920_IRQ_CALLBACK s3c2410_irq
ulong get_FCLK (void);
ulong get_HCLK (void);
ulong get_PCLK (void);