xref: /openbmc/linux/arch/mips/include/asm/irq.h (revision e2f1cf25)
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 #ifdef CONFIG_I8259
21 static inline int irq_canonicalize(int irq)
22 {
23 	return ((irq == I8259A_IRQ_BASE + 2) ? I8259A_IRQ_BASE + 9 : irq);
24 }
25 #else
26 #define irq_canonicalize(irq) (irq)	/* Sane hardware, sane code ... */
27 #endif
28 
29 asmlinkage void plat_irq_dispatch(void);
30 
31 extern void do_IRQ(unsigned int irq);
32 
33 extern void arch_init_irq(void);
34 extern void spurious_interrupt(void);
35 
36 extern int allocate_irqno(void);
37 extern void alloc_legacy_irqno(void);
38 extern void free_irqno(unsigned int irq);
39 
40 /*
41  * Before R2 the timer and performance counter interrupts were both fixed to
42  * IE7.	 Since R2 their number has to be read from the c0_intctl register.
43  */
44 #define CP0_LEGACY_COMPARE_IRQ 7
45 #define CP0_LEGACY_PERFCNT_IRQ 7
46 
47 extern int cp0_compare_irq;
48 extern int cp0_compare_irq_shift;
49 extern int cp0_perfcount_irq;
50 extern int cp0_fdc_irq;
51 
52 extern int __weak get_c0_fdc_int(void);
53 
54 void arch_trigger_all_cpu_backtrace(bool);
55 #define arch_trigger_all_cpu_backtrace arch_trigger_all_cpu_backtrace
56 
57 #endif /* _ASM_IRQ_H */
58