diff options
Diffstat (limited to 'arch/mips64/sgi-ip27/ip27-irq.c')
| -rw-r--r-- | arch/mips64/sgi-ip27/ip27-irq.c | 22 |
1 files changed, 20 insertions, 2 deletions
diff --git a/arch/mips64/sgi-ip27/ip27-irq.c b/arch/mips64/sgi-ip27/ip27-irq.c index 7f5a36f97..c9e6fe150 100644 --- a/arch/mips64/sgi-ip27/ip27-irq.c +++ b/arch/mips64/sgi-ip27/ip27-irq.c @@ -1,4 +1,4 @@ -/* $Id: ip27-irq.c,v 1.5 2000/02/04 07:40:24 ralf Exp $ +/* $Id: ip27-irq.c,v 1.6 2000/02/10 05:58:56 dagum Exp $ * * ip27-irq.c: Highlevel interrupt handling for IP27 architecture. * @@ -35,6 +35,24 @@ #include <asm/sn/sn0/ip27.h> #include <asm/sn/arch.h> +/* + * Linux has a controller-independent x86 interrupt architecture. + * every controller has a 'controller-template', that is used + * by the main code to do the right thing. Each driver-visible + * interrupt source is transparently wired to the apropriate + * controller. Thus drivers need not be aware of the + * interrupt-controller. + * + * Various interrupt controllers we handle: 8259 PIC, SMP IO-APIC, + * PIIX4's internal 8259 PIC and SGI's Visual Workstation Cobalt (IO-)APIC. + * (IO-APICs assumed to be messaging to Pentium local-APICs) + * + * the code is designed to be easily extended with new/different + * interrupt controllers, without having to do assembly magic. + */ + +irq_cpustat_t irq_stat [NR_CPUS]; + extern asmlinkage void ip27_irq(void); int (*irq_cannonicalize)(int irq); @@ -255,7 +273,7 @@ void irq_debug(void) printk("PI_INT_MASK0_A = 0x%x\n", LOCAL_HUB_L(PI_INT_MASK0_A)); } -int setup_irq(int irq, struct irqaction *new) +int setup_irq(unsigned int irq, struct irqaction *new) { int shared = 0; struct irqaction *old, **p; |