64 lines
1.6 KiB
C
64 lines
1.6 KiB
C
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/*
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* irq.c: GT64120 Interrupt Controller
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*
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* Copyright (C) 2006, Wind River System Inc.
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* Author: Rongkai.Zhan, <rongkai.zhan@windriver.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*/
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#include <linux/errno.h>
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#include <linux/init.h>
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#include <linux/kernel_stat.h>
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#include <linux/module.h>
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#include <linux/signal.h>
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#include <linux/sched.h>
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#include <linux/types.h>
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#include <linux/interrupt.h>
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#include <linux/ioport.h>
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#include <linux/timex.h>
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#include <linux/slab.h>
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#include <linux/random.h>
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#include <linux/bitops.h>
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#include <asm/bootinfo.h>
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#include <asm/io.h>
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#include <asm/bitops.h>
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#include <asm/mipsregs.h>
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#include <asm/system.h>
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#include <asm/irq_cpu.h>
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#include <asm/gt64120.h>
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extern asmlinkage void handle_IRQ(void);
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/**
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* Initialize GT64120 Interrupt Controller
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*/
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void gt64120_init_pic(void)
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{
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/* clear CPU Interrupt Cause Registers */
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GT_WRITE(GT_INTRCAUSE_OFS, (0x1F << 21));
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GT_WRITE(GT_HINTRCAUSE_OFS, 0x00);
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/* Disable all interrupts from GT64120 bridge chip */
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GT_WRITE(GT_INTRMASK_OFS, 0x00);
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GT_WRITE(GT_HINTRMASK_OFS, 0x00);
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GT_WRITE(GT_PCI0_ICMASK_OFS, 0x00);
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GT_WRITE(GT_PCI0_HICMASK_OFS, 0x00);
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}
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void __init arch_init_irq(void)
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{
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/* enable all CPU interrupt bits. */
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set_c0_status(ST0_IM); /* IE bit is still 0 */
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/* Install MIPS Interrupt Trap Vector */
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set_except_vector(0, handle_IRQ);
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/* IRQ 0 - 7 are for MIPS common irq_cpu controller */
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mips_cpu_irq_init(0);
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gt64120_init_pic();
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}
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