1 // SPDX-License-Identifier: GPL-2.0-only <<
2 /* 1 /*
3 * Copyright (C) 2011-12 Synopsys, Inc. (www.s !! 2 * irq.c
>> 3 *
>> 4 * (C) Copyright 2007, Greg Ungerer <gerg@snapgear.com>
>> 5 *
>> 6 * This file is subject to the terms and conditions of the GNU General Public
>> 7 * License. See the file COPYING in the main directory of this archive
>> 8 * for more details.
4 */ 9 */
5 10
>> 11 #include <linux/types.h>
>> 12 #include <linux/init.h>
>> 13 #include <linux/kernel.h>
>> 14 #include <linux/kernel_stat.h>
6 #include <linux/interrupt.h> 15 #include <linux/interrupt.h>
7 #include <linux/irqchip.h> !! 16 #include <linux/irq.h>
8 #include <asm/mach_desc.h> !! 17 #include <linux/seq_file.h>
>> 18 #include <asm/traps.h>
9 19
10 #include <asm/irq_regs.h> !! 20 asmlinkage void do_IRQ(int irq, struct pt_regs *regs)
11 #include <asm/smp.h> <<
12 <<
13 /* <<
14 * Late Interrupt system init called from star <<
15 * <<
16 * Since slab must already be initialized, pla <<
17 * needed request_irq( )s <<
18 */ <<
19 void __init init_IRQ(void) <<
20 { 21 {
21 /* !! 22 struct pt_regs *oldregs = set_irq_regs(regs);
22 * process the entire interrupt tree i !! 23
23 * Any external intc will be setup pro !! 24 irq_enter();
24 * properly !! 25 generic_handle_irq(irq);
25 */ !! 26 irq_exit();
26 irqchip_init(); <<
27 <<
28 #ifdef CONFIG_SMP <<
29 /* a SMP H/w block could do IPI IRQ re <<
30 if (plat_smp_ops.init_per_cpu) <<
31 plat_smp_ops.init_per_cpu(smp_ <<
32 #endif <<
33 27
34 if (machine_desc->init_per_cpu) !! 28 set_irq_regs(oldregs);
35 machine_desc->init_per_cpu(smp <<
36 } 29 }
37 30
38 /* <<
39 * "C" Entry point for any ARC ISR, called fro <<
40 * @irq is the vector number read from ICAUSE <<
41 */ <<
42 void arch_do_IRQ(unsigned int hwirq, struct pt <<
43 { <<
44 struct pt_regs *old_regs; <<
45 31
46 irq_enter(); !! 32 /* The number of spurious interrupts */
47 old_regs = set_irq_regs(regs); !! 33 atomic_t irq_err_count;
48 generic_handle_domain_irq(NULL, hwirq) !! 34
49 set_irq_regs(old_regs); !! 35 int arch_show_interrupts(struct seq_file *p, int prec)
50 irq_exit(); !! 36 {
>> 37 seq_printf(p, "%*s: %10u\n", prec, "ERR", atomic_read(&irq_err_count));
>> 38 return 0;
51 } 39 }
52 40
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