1417836e81
Further incorporation of generic irq framework. Replacing __do_IRQ() by proper flow handler would make the irq handling path a bit simpler and faster. * use generic_handle_irq() instead of __do_IRQ(). * use handle_level_irq for obvious level-type irq chips. * use handle_percpu_irq for irqs marked as IRQ_PER_CPU. * setup .eoi routine for irq chips possibly used with handle_percpu_irq. Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
59 lines
1.4 KiB
C
59 lines
1.4 KiB
C
/*
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* Copyright (C) 2003 Ralf Baechle
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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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* Handler for RM7000 extended interrupts. These are a non-standard
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* feature so we handle them separately from standard interrupts.
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*/
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/kernel.h>
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#include <asm/irq_cpu.h>
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#include <asm/mipsregs.h>
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#include <asm/system.h>
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static int irq_base;
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static inline void unmask_rm7k_irq(unsigned int irq)
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{
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set_c0_intcontrol(0x100 << (irq - irq_base));
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}
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static inline void mask_rm7k_irq(unsigned int irq)
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{
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clear_c0_intcontrol(0x100 << (irq - irq_base));
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}
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static void rm7k_cpu_irq_end(unsigned int irq)
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{
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if (!(irq_desc[irq].status & (IRQ_DISABLED | IRQ_INPROGRESS)))
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unmask_rm7k_irq(irq);
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}
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static struct irq_chip rm7k_irq_controller = {
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.typename = "RM7000",
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.ack = mask_rm7k_irq,
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.mask = mask_rm7k_irq,
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.mask_ack = mask_rm7k_irq,
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.unmask = unmask_rm7k_irq,
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.end = rm7k_cpu_irq_end,
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};
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void __init rm7k_cpu_irq_init(int base)
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{
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int i;
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clear_c0_intcontrol(0x00000f00); /* Mask all */
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for (i = base; i < base + 4; i++)
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set_irq_chip_and_handler(i, &rm7k_irq_controller,
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handle_level_irq);
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irq_base = base;
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}
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