arch/mips/cobalt/irq.c

Source file repositories/reference/linux-study-clean/arch/mips/cobalt/irq.c

File Facts

System
Linux kernel
Corpus path
arch/mips/cobalt/irq.c
Extension
.c
Size
1533 bytes
Lines
65
Domain
Architecture Layer
Bucket
arch/mips
Inferred role
Architecture Layer: implementation source
Status
source implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

else if (pending & CAUSEF_IP6) {
		irq = i8259_irq();
		if (irq < 0)
			spurious_interrupt();
		else
			do_IRQ(irq);
	} else if (pending & CAUSEF_IP3)
		do_IRQ(MIPS_CPU_IRQ_BASE + 3);
	else if (pending & CAUSEF_IP4)
		do_IRQ(MIPS_CPU_IRQ_BASE + 4);
	else if (pending & CAUSEF_IP5)
		do_IRQ(MIPS_CPU_IRQ_BASE + 5);
	else if (pending & CAUSEF_IP7)
		do_IRQ(MIPS_CPU_IRQ_BASE + 7);
	else
		spurious_interrupt();
}

void __init arch_init_irq(void)
{
	mips_cpu_irq_init();
	gt641xx_irq_init();
	init_i8259_irqs();

	if (request_irq(GT641XX_CASCADE_IRQ, no_action, IRQF_NO_THREAD,
			"cascade", NULL)) {
		pr_err("Failed to request irq %d (cascade)\n",
		       GT641XX_CASCADE_IRQ);
	}
	if (request_irq(I8259_CASCADE_IRQ, no_action, IRQF_NO_THREAD,
			"cascade", NULL)) {
		pr_err("Failed to request irq %d (cascade)\n",
		       I8259_CASCADE_IRQ);
	}
}

Annotation

Implementation Notes