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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/* $Id: irq.h,v 1.32 2000/08/26 02:42:28 anton Exp $
2 * irq.h: IRQ registers on the Sparc.
3 *
4 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
5 */
6
7#ifndef _SPARC_IRQ_H
8#define _SPARC_IRQ_H
9
Linus Torvalds1da177e2005-04-16 15:20:36 -070010#include <linux/linkage.h>
11#include <linux/threads.h> /* For NR_CPUS */
12#include <linux/interrupt.h>
13
14#include <asm/system.h> /* For SUN4M_NCPUS */
15#include <asm/btfixup.h>
16
17#define __irq_ino(irq) irq
18#define __irq_pil(irq) irq
Linus Torvalds1da177e2005-04-16 15:20:36 -070019
20#define NR_IRQS 16
21
22#define irq_canonicalize(irq) (irq)
23
24/* Dave Redman (djhr@tadpole.co.uk)
25 * changed these to function pointers.. it saves cycles and will allow
26 * the irq dependencies to be split into different files at a later date
27 * sun4c_irq.c, sun4m_irq.c etc so we could reduce the kernel size.
28 * Jakub Jelinek (jj@sunsite.mff.cuni.cz)
29 * Changed these to btfixup entities... It saves cycles :)
30 */
31BTFIXUPDEF_CALL(void, disable_irq, unsigned int)
32BTFIXUPDEF_CALL(void, enable_irq, unsigned int)
33BTFIXUPDEF_CALL(void, disable_pil_irq, unsigned int)
34BTFIXUPDEF_CALL(void, enable_pil_irq, unsigned int)
35BTFIXUPDEF_CALL(void, clear_clock_irq, void)
36BTFIXUPDEF_CALL(void, clear_profile_irq, int)
37BTFIXUPDEF_CALL(void, load_profile_irq, int, unsigned int)
38
39static inline void disable_irq_nosync(unsigned int irq)
40{
41 BTFIXUP_CALL(disable_irq)(irq);
42}
43
44static inline void disable_irq(unsigned int irq)
45{
46 BTFIXUP_CALL(disable_irq)(irq);
47}
48
49static inline void enable_irq(unsigned int irq)
50{
51 BTFIXUP_CALL(enable_irq)(irq);
52}
53
54static inline void disable_pil_irq(unsigned int irq)
55{
56 BTFIXUP_CALL(disable_pil_irq)(irq);
57}
58
59static inline void enable_pil_irq(unsigned int irq)
60{
61 BTFIXUP_CALL(enable_pil_irq)(irq);
62}
63
64static inline void clear_clock_irq(void)
65{
66 BTFIXUP_CALL(clear_clock_irq)();
67}
68
69static inline void clear_profile_irq(int irq)
70{
71 BTFIXUP_CALL(clear_profile_irq)(irq);
72}
73
74static inline void load_profile_irq(int cpu, int limit)
75{
76 BTFIXUP_CALL(load_profile_irq)(cpu, limit);
77}
78
David Howells40220c12006-10-09 12:19:47 +010079extern void (*sparc_init_timers)(irq_handler_t lvl10_irq);
80extern void claim_ticker14(irq_handler_t irq_handler,
Linus Torvalds1da177e2005-04-16 15:20:36 -070081 int irq,
82 unsigned int timeout);
83
84#ifdef CONFIG_SMP
85BTFIXUPDEF_CALL(void, set_cpu_int, int, int)
86BTFIXUPDEF_CALL(void, clear_cpu_int, int, int)
87BTFIXUPDEF_CALL(void, set_irq_udt, int)
88
89#define set_cpu_int(cpu,level) BTFIXUP_CALL(set_cpu_int)(cpu,level)
90#define clear_cpu_int(cpu,level) BTFIXUP_CALL(clear_cpu_int)(cpu,level)
91#define set_irq_udt(cpu) BTFIXUP_CALL(set_irq_udt)(cpu)
92#endif
93
David Howells40220c12006-10-09 12:19:47 +010094extern int request_fast_irq(unsigned int irq, irq_handler_t handler, unsigned long flags, __const__ char *devname);
Linus Torvalds1da177e2005-04-16 15:20:36 -070095
96/* On the sun4m, just like the timers, we have both per-cpu and master
97 * interrupt registers.
98 */
99
100/* These registers are used for sending/receiving irqs from/to
101 * different cpu's.
102 */
103struct sun4m_intreg_percpu {
104 unsigned int tbt; /* Interrupts still pending for this cpu. */
105
106 /* These next two registers are WRITE-ONLY and are only
107 * "on bit" sensitive, "off bits" written have NO affect.
108 */
109 unsigned int clear; /* Clear this cpus irqs here. */
110 unsigned int set; /* Set this cpus irqs here. */
111 unsigned char space[PAGE_SIZE - 12];
112};
113
114/*
115 * djhr
116 * Actually the clear and set fields in this struct are misleading..
117 * according to the SLAVIO manual (and the same applies for the SEC)
118 * the clear field clears bits in the mask which will ENABLE that IRQ
119 * the set field sets bits in the mask to DISABLE the IRQ.
120 *
121 * Also the undirected_xx address in the SLAVIO is defined as
122 * RESERVED and write only..
123 *
124 * DAVEM_NOTE: The SLAVIO only specifies behavior on uniprocessor
125 * sun4m machines, for MP the layout makes more sense.
126 */
127struct sun4m_intregs {
128 struct sun4m_intreg_percpu cpu_intregs[SUN4M_NCPUS];
129 unsigned int tbt; /* IRQ's that are still pending. */
130 unsigned int irqs; /* Master IRQ bits. */
131
132 /* Again, like the above, two these registers are WRITE-ONLY. */
133 unsigned int clear; /* Clear master IRQ's by setting bits here. */
134 unsigned int set; /* Set master IRQ's by setting bits here. */
135
136 /* This register is both READ and WRITE. */
137 unsigned int undirected_target; /* Which cpu gets undirected irqs. */
138};
139
140extern struct sun4m_intregs *sun4m_interrupts;
141
142/*
143 * Bit field defines for the interrupt registers on various
144 * Sparc machines.
145 */
146
147/* The sun4c interrupt register. */
148#define SUN4C_INT_ENABLE 0x01 /* Allow interrupts. */
149#define SUN4C_INT_E14 0x80 /* Enable level 14 IRQ. */
150#define SUN4C_INT_E10 0x20 /* Enable level 10 IRQ. */
151#define SUN4C_INT_E8 0x10 /* Enable level 8 IRQ. */
152#define SUN4C_INT_E6 0x08 /* Enable level 6 IRQ. */
153#define SUN4C_INT_E4 0x04 /* Enable level 4 IRQ. */
154#define SUN4C_INT_E1 0x02 /* Enable level 1 IRQ. */
155
156/* Dave Redman (djhr@tadpole.co.uk)
157 * The sun4m interrupt registers.
158 */
159#define SUN4M_INT_ENABLE 0x80000000
160#define SUN4M_INT_E14 0x00000080
161#define SUN4M_INT_E10 0x00080000
162
163#define SUN4M_HARD_INT(x) (0x000000001 << (x))
164#define SUN4M_SOFT_INT(x) (0x000010000 << (x))
165
166#define SUN4M_INT_MASKALL 0x80000000 /* mask all interrupts */
167#define SUN4M_INT_MODULE_ERR 0x40000000 /* module error */
168#define SUN4M_INT_M2S_WRITE 0x20000000 /* write buffer error */
169#define SUN4M_INT_ECC 0x10000000 /* ecc memory error */
170#define SUN4M_INT_FLOPPY 0x00400000 /* floppy disk */
171#define SUN4M_INT_MODULE 0x00200000 /* module interrupt */
172#define SUN4M_INT_VIDEO 0x00100000 /* onboard video */
173#define SUN4M_INT_REALTIME 0x00080000 /* system timer */
174#define SUN4M_INT_SCSI 0x00040000 /* onboard scsi */
175#define SUN4M_INT_AUDIO 0x00020000 /* audio/isdn */
176#define SUN4M_INT_ETHERNET 0x00010000 /* onboard ethernet */
177#define SUN4M_INT_SERIAL 0x00008000 /* serial ports */
178#define SUN4M_INT_KBDMS 0x00004000 /* keyboard/mouse */
179#define SUN4M_INT_SBUSBITS 0x00003F80 /* sbus int bits */
180
181#define SUN4M_INT_SBUS(x) (1 << (x+7))
182#define SUN4M_INT_VME(x) (1 << (x))
183
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184#endif