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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2012 Regents of the University of California
* Copyright (C) 2017 SiFive
* Copyright (C) 2018 Christoph Hellwig
*/
#include <linux/interrupt.h>
#include <linux/irqchip.h>
#include <linux/irqdomain.h>
#include <linux/seq_file.h>
#include <asm/smp.h>
int arch_show_interrupts(struct seq_file *p, int prec)
{
show_ipi_stats(p, prec);
return 0;
}
asmlinkage __visible void __irq_entry do_IRQ(struct pt_regs *regs)
{
struct pt_regs *old_regs = set_irq_regs(regs);
irq_enter();
switch (regs->cause & ~CAUSE_IRQ_FLAG) {
case RV_IRQ_TIMER:
riscv_timer_interrupt();
break;
#ifdef CONFIG_SMP
case RV_IRQ_SOFT:
/*
* We only use software interrupts to pass IPIs, so if a non-SMP
* system gets one, then we don't know what to do.
*/
riscv_software_interrupt();
break;
#endif
case RV_IRQ_EXT:
handle_arch_irq(regs);
break;
default:
pr_alert("unexpected interrupt cause 0x%lx", regs->cause);
BUG();
}
irq_exit();
set_irq_regs(old_regs);
}
void __init init_IRQ(void)
{
irqchip_init();
}
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