diff options
Diffstat (limited to 'kernel/arch/mips/cobalt/irq.c')
| -rw-r--r-- | kernel/arch/mips/cobalt/irq.c | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/kernel/arch/mips/cobalt/irq.c b/kernel/arch/mips/cobalt/irq.c new file mode 100644 index 000000000..965c777d3 --- /dev/null +++ b/kernel/arch/mips/cobalt/irq.c @@ -0,0 +1,62 @@ +/* + * IRQ vector handles + * + * 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 + * for more details. + * + * Copyright (C) 1995, 1996, 1997, 2003 by Ralf Baechle + */ +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/irq.h> +#include <linux/interrupt.h> +#include <linux/pci.h> + +#include <asm/i8259.h> +#include <asm/irq_cpu.h> +#include <asm/irq_gt641xx.h> +#include <asm/gt64120.h> + +#include <irq.h> + +asmlinkage void plat_irq_dispatch(void) +{ + unsigned pending = read_c0_status() & read_c0_cause() & ST0_IM; + int irq; + + if (pending & CAUSEF_IP2) + gt641xx_irq_dispatch(); + else if (pending & CAUSEF_IP6) { + irq = i8259_irq(); + if (irq < 0) + spurious_interrupt(); + else + do_IRQ(irq); + } else if (pending & CAUSEF_IP3) + do_IRQ(MIPS_CPU_IRQ_BASE + 3); + else if (pending & CAUSEF_IP4) + do_IRQ(MIPS_CPU_IRQ_BASE + 4); + else if (pending & CAUSEF_IP5) + do_IRQ(MIPS_CPU_IRQ_BASE + 5); + else if (pending & CAUSEF_IP7) + do_IRQ(MIPS_CPU_IRQ_BASE + 7); + else + spurious_interrupt(); +} + +static struct irqaction cascade = { + .handler = no_action, + .name = "cascade", + .flags = IRQF_NO_THREAD, +}; + +void __init arch_init_irq(void) +{ + mips_cpu_irq_init(); + gt641xx_irq_init(); + init_i8259_irqs(); + + setup_irq(GT641XX_CASCADE_IRQ, &cascade); + setup_irq(I8259_CASCADE_IRQ, &cascade); +} |