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 suhc 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
Index: u-boot/cpu/arm920t/interrupts.c =================================================================== --- u-boot.orig/cpu/arm920t/interrupts.c +++ u-boot/cpu/arm920t/interrupts.c @@ -161,11 +161,16 @@
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); Index: u-boot/cpu/arm920t/s3c24x0/interrupts.c =================================================================== --- u-boot.orig/cpu/arm920t/s3c24x0/interrupts.c +++ u-boot/cpu/arm920t/s3c24x0/interrupts.c @@ -216,4 +216,13 @@ /*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) */ Index: u-boot/include/common.h =================================================================== --- u-boot.orig/include/common.h +++ u-boot/include/common.h @@ -480,6 +480,8 @@ 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);