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64 lines
1.5 KiB
64 lines
1.5 KiB
/* |
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* IRQ vector handles |
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* |
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* This file is subject to the terms and conditions of the GNU General Public |
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* License. See the file "COPYING" in the main directory of this archive |
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* for more details. |
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* |
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* Copyright (C) 1995, 1996, 1997, 2003 by Ralf Baechle |
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*/ |
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#include <linux/kernel.h> |
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#include <linux/init.h> |
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#include <linux/irq.h> |
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#include <linux/interrupt.h> |
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#include <linux/pci.h> |
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#include <asm/i8259.h> |
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#include <asm/irq_cpu.h> |
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#include <asm/irq_gt641xx.h> |
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#include <asm/gt64120.h> |
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#include <irq.h> |
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asmlinkage void plat_irq_dispatch(void) |
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{ |
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unsigned pending = read_c0_status() & read_c0_cause() & ST0_IM; |
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int irq; |
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if (pending & CAUSEF_IP2) |
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gt641xx_irq_dispatch(); |
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else if (pending & CAUSEF_IP6) { |
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irq = i8259_irq(); |
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if (irq < 0) |
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spurious_interrupt(); |
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else |
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do_IRQ(irq); |
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} else if (pending & CAUSEF_IP3) |
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do_IRQ(MIPS_CPU_IRQ_BASE + 3); |
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else if (pending & CAUSEF_IP4) |
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do_IRQ(MIPS_CPU_IRQ_BASE + 4); |
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else if (pending & CAUSEF_IP5) |
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do_IRQ(MIPS_CPU_IRQ_BASE + 5); |
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else if (pending & CAUSEF_IP7) |
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do_IRQ(MIPS_CPU_IRQ_BASE + 7); |
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else |
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spurious_interrupt(); |
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} |
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void __init arch_init_irq(void) |
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{ |
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mips_cpu_irq_init(); |
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gt641xx_irq_init(); |
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init_i8259_irqs(); |
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if (request_irq(GT641XX_CASCADE_IRQ, no_action, IRQF_NO_THREAD, |
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"cascade", NULL)) { |
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pr_err("Failed to request irq %d (cascade)\n", |
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GT641XX_CASCADE_IRQ); |
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} |
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if (request_irq(I8259_CASCADE_IRQ, no_action, IRQF_NO_THREAD, |
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"cascade", NULL)) { |
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pr_err("Failed to request irq %d (cascade)\n", |
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I8259_CASCADE_IRQ); |
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} |
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}
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