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