mirror of https://gitee.com/openkylin/linux.git
78 lines
2.5 KiB
C
78 lines
2.5 KiB
C
/*
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* Copyright 2000 MontaVista Software Inc.
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* Author: MontaVista Software, Inc.
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* ppopov@mvista.com or source@mvista.com
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*
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* This file was derived from Carsten Langgaard's
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* arch/mips/mips-boards/atlas/atlas_int.c.
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*
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* Carsten Langgaard, carstenl@mips.com
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* Copyright (C) 1999,2000 MIPS Technologies, Inc. All rights reserved.
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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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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
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* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 675 Mass Ave, Cambridge, MA 02139, USA.
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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/irq.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 <asm/irq_cpu.h>
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static inline unsigned int ffz8(unsigned int word)
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{
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unsigned long k;
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k = 7;
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if (word & 0x0fUL) { k -= 4; word <<= 4; }
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if (word & 0x30UL) { k -= 2; word <<= 2; }
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if (word & 0x40UL) { k -= 1; }
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return k;
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}
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extern void mips_timer_interrupt(struct pt_regs *regs);
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asmlinkage void ev96100_cpu_irq(unsigned int pending, struct pt_regs *regs)
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{
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do_IRQ(ffz8(pending >> 8), regs);
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}
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asmlinkage void plat_irq_dispatch(struct pt_regs *regs)
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{
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unsigned int pending = read_c0_cause() & read_c0_status() & ST0_IM;
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if (pending & CAUSEF_IP7)
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mips_timer_interrupt(regs);
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else if (pending)
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ev96100_cpu_irq(pending, regs);
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else
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spurious_interrupt(regs);
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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(0);
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}
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