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Linux kernel mirror (for testing)
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linux
1/* $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
10#include <linux/config.h>
11#include <linux/linkage.h>
12#include <linux/threads.h> /* For NR_CPUS */
13#include <linux/interrupt.h>
14
15#include <asm/system.h> /* For SUN4M_NCPUS */
16#include <asm/btfixup.h>
17
18#define __irq_ino(irq) irq
19#define __irq_pil(irq) irq
20BTFIXUPDEF_CALL(char *, __irq_itoa, unsigned int)
21#define __irq_itoa(irq) BTFIXUP_CALL(__irq_itoa)(irq)
22
23#define NR_IRQS 16
24
25#define irq_canonicalize(irq) (irq)
26
27/* Dave Redman (djhr@tadpole.co.uk)
28 * changed these to function pointers.. it saves cycles and will allow
29 * the irq dependencies to be split into different files at a later date
30 * sun4c_irq.c, sun4m_irq.c etc so we could reduce the kernel size.
31 * Jakub Jelinek (jj@sunsite.mff.cuni.cz)
32 * Changed these to btfixup entities... It saves cycles :)
33 */
34BTFIXUPDEF_CALL(void, disable_irq, unsigned int)
35BTFIXUPDEF_CALL(void, enable_irq, unsigned int)
36BTFIXUPDEF_CALL(void, disable_pil_irq, unsigned int)
37BTFIXUPDEF_CALL(void, enable_pil_irq, unsigned int)
38BTFIXUPDEF_CALL(void, clear_clock_irq, void)
39BTFIXUPDEF_CALL(void, clear_profile_irq, int)
40BTFIXUPDEF_CALL(void, load_profile_irq, int, unsigned int)
41
42static inline void disable_irq_nosync(unsigned int irq)
43{
44 BTFIXUP_CALL(disable_irq)(irq);
45}
46
47static inline void disable_irq(unsigned int irq)
48{
49 BTFIXUP_CALL(disable_irq)(irq);
50}
51
52static inline void enable_irq(unsigned int irq)
53{
54 BTFIXUP_CALL(enable_irq)(irq);
55}
56
57static inline void disable_pil_irq(unsigned int irq)
58{
59 BTFIXUP_CALL(disable_pil_irq)(irq);
60}
61
62static inline void enable_pil_irq(unsigned int irq)
63{
64 BTFIXUP_CALL(enable_pil_irq)(irq);
65}
66
67static inline void clear_clock_irq(void)
68{
69 BTFIXUP_CALL(clear_clock_irq)();
70}
71
72static inline void clear_profile_irq(int irq)
73{
74 BTFIXUP_CALL(clear_profile_irq)(irq);
75}
76
77static inline void load_profile_irq(int cpu, int limit)
78{
79 BTFIXUP_CALL(load_profile_irq)(cpu, limit);
80}
81
82extern void (*sparc_init_timers)(irqreturn_t (*lvl10_irq)(int, void *, struct pt_regs *));
83extern void claim_ticker14(irqreturn_t (*irq_handler)(int, void *, struct pt_regs *),
84 int irq,
85 unsigned int timeout);
86
87#ifdef CONFIG_SMP
88BTFIXUPDEF_CALL(void, set_cpu_int, int, int)
89BTFIXUPDEF_CALL(void, clear_cpu_int, int, int)
90BTFIXUPDEF_CALL(void, set_irq_udt, int)
91
92#define set_cpu_int(cpu,level) BTFIXUP_CALL(set_cpu_int)(cpu,level)
93#define clear_cpu_int(cpu,level) BTFIXUP_CALL(clear_cpu_int)(cpu,level)
94#define set_irq_udt(cpu) BTFIXUP_CALL(set_irq_udt)(cpu)
95#endif
96
97extern int request_fast_irq(unsigned int irq, irqreturn_t (*handler)(int, void *, struct pt_regs *), unsigned long flags, __const__ char *devname);
98
99/* On the sun4m, just like the timers, we have both per-cpu and master
100 * interrupt registers.
101 */
102
103/* These registers are used for sending/receiving irqs from/to
104 * different cpu's.
105 */
106struct sun4m_intreg_percpu {
107 unsigned int tbt; /* Interrupts still pending for this cpu. */
108
109 /* These next two registers are WRITE-ONLY and are only
110 * "on bit" sensitive, "off bits" written have NO affect.
111 */
112 unsigned int clear; /* Clear this cpus irqs here. */
113 unsigned int set; /* Set this cpus irqs here. */
114 unsigned char space[PAGE_SIZE - 12];
115};
116
117/*
118 * djhr
119 * Actually the clear and set fields in this struct are misleading..
120 * according to the SLAVIO manual (and the same applies for the SEC)
121 * the clear field clears bits in the mask which will ENABLE that IRQ
122 * the set field sets bits in the mask to DISABLE the IRQ.
123 *
124 * Also the undirected_xx address in the SLAVIO is defined as
125 * RESERVED and write only..
126 *
127 * DAVEM_NOTE: The SLAVIO only specifies behavior on uniprocessor
128 * sun4m machines, for MP the layout makes more sense.
129 */
130struct sun4m_intregs {
131 struct sun4m_intreg_percpu cpu_intregs[SUN4M_NCPUS];
132 unsigned int tbt; /* IRQ's that are still pending. */
133 unsigned int irqs; /* Master IRQ bits. */
134
135 /* Again, like the above, two these registers are WRITE-ONLY. */
136 unsigned int clear; /* Clear master IRQ's by setting bits here. */
137 unsigned int set; /* Set master IRQ's by setting bits here. */
138
139 /* This register is both READ and WRITE. */
140 unsigned int undirected_target; /* Which cpu gets undirected irqs. */
141};
142
143extern struct sun4m_intregs *sun4m_interrupts;
144
145/*
146 * Bit field defines for the interrupt registers on various
147 * Sparc machines.
148 */
149
150/* The sun4c interrupt register. */
151#define SUN4C_INT_ENABLE 0x01 /* Allow interrupts. */
152#define SUN4C_INT_E14 0x80 /* Enable level 14 IRQ. */
153#define SUN4C_INT_E10 0x20 /* Enable level 10 IRQ. */
154#define SUN4C_INT_E8 0x10 /* Enable level 8 IRQ. */
155#define SUN4C_INT_E6 0x08 /* Enable level 6 IRQ. */
156#define SUN4C_INT_E4 0x04 /* Enable level 4 IRQ. */
157#define SUN4C_INT_E1 0x02 /* Enable level 1 IRQ. */
158
159/* Dave Redman (djhr@tadpole.co.uk)
160 * The sun4m interrupt registers.
161 */
162#define SUN4M_INT_ENABLE 0x80000000
163#define SUN4M_INT_E14 0x00000080
164#define SUN4M_INT_E10 0x00080000
165
166#define SUN4M_HARD_INT(x) (0x000000001 << (x))
167#define SUN4M_SOFT_INT(x) (0x000010000 << (x))
168
169#define SUN4M_INT_MASKALL 0x80000000 /* mask all interrupts */
170#define SUN4M_INT_MODULE_ERR 0x40000000 /* module error */
171#define SUN4M_INT_M2S_WRITE 0x20000000 /* write buffer error */
172#define SUN4M_INT_ECC 0x10000000 /* ecc memory error */
173#define SUN4M_INT_FLOPPY 0x00400000 /* floppy disk */
174#define SUN4M_INT_MODULE 0x00200000 /* module interrupt */
175#define SUN4M_INT_VIDEO 0x00100000 /* onboard video */
176#define SUN4M_INT_REALTIME 0x00080000 /* system timer */
177#define SUN4M_INT_SCSI 0x00040000 /* onboard scsi */
178#define SUN4M_INT_AUDIO 0x00020000 /* audio/isdn */
179#define SUN4M_INT_ETHERNET 0x00010000 /* onboard ethernet */
180#define SUN4M_INT_SERIAL 0x00008000 /* serial ports */
181#define SUN4M_INT_KBDMS 0x00004000 /* keyboard/mouse */
182#define SUN4M_INT_SBUSBITS 0x00003F80 /* sbus int bits */
183
184#define SUN4M_INT_SBUS(x) (1 << (x+7))
185#define SUN4M_INT_VME(x) (1 << (x))
186
187struct irqaction;
188struct pt_regs;
189int handle_IRQ_event(unsigned int, struct pt_regs *, struct irqaction *);
190
191#endif