diff options
Diffstat (limited to 'arch/mips/kernel/irq.c')
| -rw-r--r-- | arch/mips/kernel/irq.c | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/arch/mips/kernel/irq.c b/arch/mips/kernel/irq.c index 4e3ba5ad9..239576e4e 100644 --- a/arch/mips/kernel/irq.c +++ b/arch/mips/kernel/irq.c @@ -1,4 +1,4 @@ -/* $Id: irq.c,v 1.19 2000/02/04 07:40:23 ralf Exp $ +/* $Id: irq.c,v 1.20 2000/02/23 00:41:00 ralf Exp $ * * This file is subject to the terms and conditions of the GNU General Public * License. See the file "COPYING" in the main directory of this archive @@ -32,6 +32,24 @@ #include <asm/nile4.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]; + +/* * This contains the irq mask for both 8259A irq controllers, it's an * int so we can deal with the third PIC in some systems like the RM300. * (XXX This is broken for big endian.) |