1 /*
2 * linux/include/asm-parisc/irq.h
3 *
4 * (C) 1992, 1993 Linus Torvalds, (C) 1997 Ingo Molnar,
5 * Copyright 1999 SuSE GmbH
6 *
7 * IRQ/IPI changes taken from work by Thomas Radke
8 * <tomsoft@informatik.tu-chemnitz.de>
9 */
10
11 #ifndef _ASM_PARISC_IRQ_H
12 #define _ASM_PARISC_IRQ_H
13
14 #include <asm/ptrace.h>
15 #include <asm/types.h>
16
17 #include <linux/string.h>
18 #include <linux/interrupt.h>
19
20
21 #define CPU_IRQ_REGION 1
22 #define TIMER_IRQ (IRQ_FROM_REGION(CPU_IRQ_REGION) | 0)
23 #define IPI_IRQ (IRQ_FROM_REGION(CPU_IRQ_REGION) | 1)
24
25 /* This should be 31 for PA1.1 binaries and 63 for PA-2.0 wide mode */
26 #define MAX_CPU_IRQ (BITS_PER_LONG - 1)
27
28 #if BITS_PER_LONG == 32
29 # define IRQ_REGION_SHIFT 5
30 #else
31 # define IRQ_REGION_SHIFT 6
32 #endif
33
34 #define IRQ_PER_REGION (1 << IRQ_REGION_SHIFT)
35 #define NR_IRQ_REGS 16
36 #define NR_IRQS (NR_IRQ_REGS * IRQ_PER_REGION)
37
38 #define IRQ_REGION(irq) ((irq) >> IRQ_REGION_SHIFT)
39 #define IRQ_OFFSET(irq) ((irq) & ((1<<IRQ_REGION_SHIFT)-1))
40 #define IRQ_FROM_REGION(reg) ((reg) << IRQ_REGION_SHIFT)
41
42 #define EISA_IRQ_REGION 0 /* region 0 needs to be reserved for EISA */
43 #define EISA_MAX_IRQS 16 /* max. (E)ISA irq line */
44
45 struct irq_region_ops {
46 void (*disable_irq)(void *dev, int irq);
47 void (* enable_irq)(void *dev, int irq);
48 void (* mask_irq)(void *dev, int irq);
49 void (* unmask_irq)(void *dev, int irq);
50 };
51
52 struct irq_region_data {
53 void *dev;
54 const char *name;
55 int irqbase;
56 unsigned int status[IRQ_PER_REGION]; /* IRQ status */
57 };
58
59 struct irq_region {
60 struct irq_region_ops ops;
61 struct irq_region_data data;
62
63 struct irqaction *action;
64 };
65
66 extern struct irq_region *irq_region[NR_IRQ_REGS];
67
irq_cannonicalize(int irq)68 static __inline__ int irq_cannonicalize(int irq)
69 {
70 #ifdef CONFIG_EISA
71 return (irq == (IRQ_FROM_REGION(EISA_IRQ_REGION)+2)
72 ? (IRQ_FROM_REGION(EISA_IRQ_REGION)+9) : irq);
73 #else
74 return irq;
75 #endif
76 }
77
78 extern void disable_irq(int);
79 #define disable_irq_nosync(i) disable_irq(i)
80 extern void enable_irq(int);
81
82 extern void do_irq(struct irqaction *a, int i, struct pt_regs *p);
83 extern void do_irq_mask(unsigned long mask, struct irq_region *region,
84 struct pt_regs *regs);
85
86 extern struct irq_region *alloc_irq_region(int count, struct irq_region_ops *ops,
87 const char *name, void *dev);
88
89 extern int txn_alloc_irq(void);
90 extern int txn_claim_irq(int);
91 extern unsigned int txn_alloc_data(int, unsigned int);
92 extern unsigned long txn_alloc_addr(int);
93
94 /* soft power switch support (power.c) */
95 extern struct tasklet_struct power_tasklet;
96
97 #endif /* _ASM_PARISC_IRQ_H */
98