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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/* $Id: irq.h,v 1.21 2002/01/23 11:27:36 davem Exp $
2 * irq.h: IRQ registers on the 64-bit Sparc.
3 *
4 * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
5 * Copyright (C) 1998 Jakub Jelinek (jj@ultra.linux.cz)
6 */
7
8#ifndef _SPARC64_IRQ_H
9#define _SPARC64_IRQ_H
10
11#include <linux/config.h>
12#include <linux/linkage.h>
13#include <linux/kernel.h>
14#include <linux/errno.h>
15#include <linux/interrupt.h>
16#include <asm/pil.h>
17#include <asm/ptrace.h>
18
David S. Miller088dd1f2005-07-04 13:24:38 -070019struct ino_bucket;
20
21#define MAX_IRQ_DESC_ACTION 4
22
23struct irq_desc {
24 void (*pre_handler)(struct ino_bucket *, void *, void *);
25 void *pre_handler_arg1;
26 void *pre_handler_arg2;
27 u32 action_active_mask;
28 struct irqaction action[MAX_IRQ_DESC_ACTION];
29};
30
Linus Torvalds1da177e2005-04-16 15:20:36 -070031/* You should not mess with this directly. That's the job of irq.c.
32 *
33 * If you make changes here, please update hand coded assembler of
David S. Miller63b61452005-06-27 17:04:45 -070034 * the vectored interrupt trap handler in entry.S -DaveM
Linus Torvalds1da177e2005-04-16 15:20:36 -070035 *
36 * This is currently one DCACHE line, two buckets per L2 cache
37 * line. Keep this in mind please.
38 */
39struct ino_bucket {
40 /* Next handler in per-CPU PIL worklist. We know that
41 * bucket pointers have the high 32-bits clear, so to
42 * save space we only store the bits we need.
43 */
44/*0x00*/unsigned int irq_chain;
45
46 /* PIL to schedule this IVEC at. */
47/*0x04*/unsigned char pil;
48
49 /* If an IVEC arrives while irq_info is NULL, we
50 * set this to notify request_irq() about the event.
51 */
52/*0x05*/unsigned char pending;
53
54 /* Miscellaneous flags. */
55/*0x06*/unsigned char flags;
56
David S. Miller088dd1f2005-07-04 13:24:38 -070057 /* Currently unused. */
58/*0x07*/unsigned char __pad;
Linus Torvalds1da177e2005-04-16 15:20:36 -070059
David S. Miller088dd1f2005-07-04 13:24:38 -070060 /* Reference to IRQ descriptor for this bucket. */
61/*0x08*/struct irq_desc *irq_info;
Linus Torvalds1da177e2005-04-16 15:20:36 -070062
63 /* Sun5 Interrupt Clear Register. */
64/*0x10*/unsigned long iclr;
65
66 /* Sun5 Interrupt Mapping Register. */
67/*0x18*/unsigned long imap;
68
69};
70
Linus Torvalds1da177e2005-04-16 15:20:36 -070071/* IMAP/ICLR register defines */
72#define IMAP_VALID 0x80000000 /* IRQ Enabled */
73#define IMAP_TID_UPA 0x7c000000 /* UPA TargetID */
74#define IMAP_TID_JBUS 0x7c000000 /* JBUS TargetID */
75#define IMAP_AID_SAFARI 0x7c000000 /* Safari AgentID */
76#define IMAP_NID_SAFARI 0x03e00000 /* Safari NodeID */
77#define IMAP_IGN 0x000007c0 /* IRQ Group Number */
78#define IMAP_INO 0x0000003f /* IRQ Number */
79#define IMAP_INR 0x000007ff /* Full interrupt number*/
80
81#define ICLR_IDLE 0x00000000 /* Idle state */
82#define ICLR_TRANSMIT 0x00000001 /* Transmit state */
83#define ICLR_PENDING 0x00000003 /* Pending state */
84
85/* Only 8-bits are available, be careful. -DaveM */
David S. Miller088dd1f2005-07-04 13:24:38 -070086#define IBF_PCI 0x02 /* PSYCHO/SABRE/SCHIZO PCI interrupt. */
87#define IBF_ACTIVE 0x04 /* Interrupt is active and has a handler.*/
88#define IBF_INPROGRESS 0x10 /* IRQ is being serviced. */
Linus Torvalds1da177e2005-04-16 15:20:36 -070089
90#define NUM_IVECS (IMAP_INR + 1)
91extern struct ino_bucket ivector_table[NUM_IVECS];
92
93#define __irq_ino(irq) \
94 (((struct ino_bucket *)(unsigned long)(irq)) - &ivector_table[0])
95#define __irq_pil(irq) ((struct ino_bucket *)(unsigned long)(irq))->pil
96#define __bucket(irq) ((struct ino_bucket *)(unsigned long)(irq))
97#define __irq(bucket) ((unsigned int)(unsigned long)(bucket))
98
99static __inline__ char *__irq_itoa(unsigned int irq)
100{
101 static char buff[16];
102
103 sprintf(buff, "%d,%x", __irq_pil(irq), (unsigned int)__irq_ino(irq));
104 return buff;
105}
106
107#define NR_IRQS 16
108
109#define irq_canonicalize(irq) (irq)
110extern void disable_irq(unsigned int);
111#define disable_irq_nosync disable_irq
112extern void enable_irq(unsigned int);
113extern unsigned int build_irq(int pil, int inofixup, unsigned long iclr, unsigned long imap);
114extern unsigned int sbus_build_irq(void *sbus, unsigned int ino);
115
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116static __inline__ void set_softint(unsigned long bits)
117{
118 __asm__ __volatile__("wr %0, 0x0, %%set_softint"
119 : /* No outputs */
120 : "r" (bits));
121}
122
123static __inline__ void clear_softint(unsigned long bits)
124{
125 __asm__ __volatile__("wr %0, 0x0, %%clear_softint"
126 : /* No outputs */
127 : "r" (bits));
128}
129
130static __inline__ unsigned long get_softint(void)
131{
132 unsigned long retval;
133
134 __asm__ __volatile__("rd %%softint, %0"
135 : "=r" (retval));
136 return retval;
137}
138
139struct irqaction;
140struct pt_regs;
141int handle_IRQ_event(unsigned int, struct pt_regs *, struct irqaction *);
142
143#endif