source: src/linux/universal/linux-4.9/arch/mips/include/asm/irq.h @ 31884

Last change on this file since 31884 was 31884, checked in by brainslayer, 7 days ago

update kernels

File size: 1.8 KB
Line 
1/*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License.  See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * Copyright (C) 1994 by Waldorf GMBH, written by Ralf Baechle
7 * Copyright (C) 1995, 96, 97, 98, 99, 2000, 01, 02, 03 by Ralf Baechle
8 */
9#ifndef _ASM_IRQ_H
10#define _ASM_IRQ_H
11
12#include <linux/linkage.h>
13#include <linux/smp.h>
14#include <linux/irqdomain.h>
15
16#include <asm/mipsmtregs.h>
17
18#include <irq.h>
19
20#define IRQ_STACK_SIZE                  THREAD_SIZE
21
22extern void *irq_stack[NR_CPUS];
23
24static inline bool on_irq_stack(int cpu, unsigned long sp)
25{
26        unsigned long low = (unsigned long)irq_stack[cpu];
27        unsigned long high = low + IRQ_STACK_SIZE;
28
29        return (low <= sp && sp <= high);
30}
31
32#ifdef CONFIG_I8259
33static inline int irq_canonicalize(int irq)
34{
35        return ((irq == I8259A_IRQ_BASE + 2) ? I8259A_IRQ_BASE + 9 : irq);
36}
37#else
38#define irq_canonicalize(irq) (irq)     /* Sane hardware, sane code ... */
39#endif
40
41asmlinkage void plat_irq_dispatch(void);
42
43extern void do_IRQ(unsigned int irq);
44
45extern void arch_init_irq(void);
46extern void spurious_interrupt(void);
47
48extern int allocate_irqno(void);
49extern void alloc_legacy_irqno(void);
50extern void free_irqno(unsigned int irq);
51
52/*
53 * Before R2 the timer and performance counter interrupts were both fixed to
54 * IE7.  Since R2 their number has to be read from the c0_intctl register.
55 */
56#define CP0_LEGACY_COMPARE_IRQ 7
57#define CP0_LEGACY_PERFCNT_IRQ 7
58
59extern int cp0_compare_irq;
60extern int cp0_compare_irq_shift;
61extern int cp0_perfcount_irq;
62extern int cp0_fdc_irq;
63
64extern int get_c0_fdc_int(void);
65
66void arch_trigger_cpumask_backtrace(const struct cpumask *mask,
67                                    bool exclude_self);
68#define arch_trigger_cpumask_backtrace arch_trigger_cpumask_backtrace
69
70#endif /* _ASM_IRQ_H */
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