66 lines
1.5 KiB
C
66 lines
1.5 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (C) 2007 Lemote Inc. & Institute of Computing Technology
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* Author: Fuxin Zhang, zhangfx@lemote.com
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*/
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#include <linux/interrupt.h>
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#include <asm/irq_cpu.h>
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#include <asm/i8259.h>
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#include <loongson.h>
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static void i8259_irqdispatch(void)
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{
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int irq;
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irq = i8259_irq();
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if (irq >= 0)
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do_IRQ(irq);
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else
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spurious_interrupt();
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}
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asmlinkage void mach_irq_dispatch(unsigned int pending)
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{
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if (pending & CAUSEF_IP7)
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do_IRQ(MIPS_CPU_IRQ_BASE + 7);
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else if (pending & CAUSEF_IP6) /* perf counter loverflow */
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return;
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else if (pending & CAUSEF_IP5)
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i8259_irqdispatch();
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else if (pending & CAUSEF_IP2)
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bonito_irqdispatch();
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else
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spurious_interrupt();
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}
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void __init mach_init_irq(void)
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{
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int irq;
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/* init all controller
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* 0-15 ------> i8259 interrupt
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* 16-23 ------> mips cpu interrupt
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* 32-63 ------> bonito irq
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*/
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/* most bonito irq should be level triggered */
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LOONGSON_INTEDGE = LOONGSON_ICU_SYSTEMERR | LOONGSON_ICU_MASTERERR |
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LOONGSON_ICU_RETRYERR | LOONGSON_ICU_MBOXES;
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/* Sets the first-level interrupt dispatcher. */
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mips_cpu_irq_init();
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init_i8259_irqs();
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bonito_irq_init();
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/* bonito irq at IP2 */
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irq = MIPS_CPU_IRQ_BASE + 2;
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if (request_irq(irq, no_action, IRQF_NO_THREAD, "cascade", NULL))
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pr_err("Failed to request irq %d (cascade)\n", irq);
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/* 8259 irq at IP5 */
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irq = MIPS_CPU_IRQ_BASE + 5;
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if (request_irq(irq, no_action, IRQF_NO_THREAD, "cascade", NULL))
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pr_err("Failed to request irq %d (cascade)\n", irq);
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}
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