summaryrefslogtreecommitdiff
path: root/sys/arch/alpha/include/intr.h
blob: b3c89a6f0e321560cee56f40621d1884382759d3 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
/* $NetBSD: intr.h,v 1.85 2021/07/16 19:02:22 thorpej Exp $ */

/*-
 * Copyright (c) 2000, 2001, 2002 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Jason R. Thorpe.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

/*
 * Copyright (c) 1997 Christopher G. Demetriou.  All rights reserved.
 * Copyright (c) 1996 Carnegie-Mellon University.
 * All rights reserved.
 *
 * Author: Chris G. Demetriou
 *
 * Permission to use, copy, modify and distribute this software and
 * its documentation is hereby granted, provided that both the copyright
 * notice and this permission notice appear in all copies of the
 * software, derivative works or modified versions, and any portions
 * thereof, and that both notices appear in supporting documentation.
 *
 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
 *
 * Carnegie Mellon requests users of this software to return to
 *
 *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
 *  School of Computer Science
 *  Carnegie Mellon University
 *  Pittsburgh PA 15213-3890
 *
 * any improvements or extensions that they make and grant Carnegie the
 * rights to redistribute these changes.
 */

#ifndef _ALPHA_INTR_H_
#define _ALPHA_INTR_H_

#include <sys/evcnt.h>
#include <machine/alpha_cpu.h>

/*
 * The Alpha System Control Block.  This is 8k long, and you get
 * 16 bytes per vector (i.e. the vector numbers are spaced 16
 * apart).
 *
 * This is sort of a "shadow" SCB -- rather than the CPU jumping
 * to (SCBaddr + (16 * vector)), like it does on the VAX, we get
 * a vector number in a1.  We use the SCB to look up a routine/arg
 * and jump to it.
 *
 * Since we use the SCB only for I/O interrupts, we make it shorter
 * than normal, starting it at vector 0x800 (the start of the I/O
 * interrupt vectors).
 */
#define	SCB_IOVECBASE	0x0800
#define	SCB_VECSIZE	0x0010
#define	SCB_SIZE	0x2000

#define	SCB_VECTOIDX(x)	((x) >> 4)
#define	SCB_IDXTOVEC(x)	((x) << 4)

#define	SCB_NIOVECS	SCB_VECTOIDX(SCB_SIZE - SCB_IOVECBASE)

struct scbvec {
	void	(*scb_func)(void *, u_long);
	void	*scb_arg;
};

/*
 * Alpha interrupts come in at one of 3 levels:
 *
 *	i/o level 1
 *	i/o level 2
 *	clock level
 *
 * However, since we do not have any way to know which hardware
 * level a particular i/o interrupt comes in on, we have to
 * whittle it down to 2.  In addition, there are 2 software interrupt
 * levels available to system software.
 */

#define	IPL_NONE	ALPHA_PSL_IPL_0
#define	IPL_SOFTCLOCK	ALPHA_PSL_IPL_SOFT_LO
#define	IPL_SOFTBIO	ALPHA_PSL_IPL_SOFT_LO
#ifdef __HAVE_FAST_SOFTINTS
#define	IPL_SOFTNET	ALPHA_PSL_IPL_SOFT_HI
#define	IPL_SOFTSERIAL	ALPHA_PSL_IPL_SOFT_HI
#else
#define	IPL_SOFTNET	ALPHA_PSL_IPL_SOFT_LO
#define	IPL_SOFTSERIAL	ALPHA_PSL_IPL_SOFT_LO
#endif /* __HAVE_FAST_SOFTINTS */
#define	IPL_VM		ALPHA_PSL_IPL_IO_HI
#define	IPL_SCHED	ALPHA_PSL_IPL_CLOCK
#define	IPL_HIGH	ALPHA_PSL_IPL_HIGH

#define	SOFTINT_CLOCK_MASK	__BIT(SOFTINT_CLOCK)
#define	SOFTINT_BIO_MASK	__BIT(SOFTINT_BIO)
#define	SOFTINT_NET_MASK	__BIT(SOFTINT_NET)
#define	SOFTINT_SERIAL_MASK	__BIT(SOFTINT_SERIAL)

#define	ALPHA_IPL1_SOFTINTS	(SOFTINT_CLOCK_MASK | SOFTINT_BIO_MASK)
#define	ALPHA_IPL2_SOFTINTS	(SOFTINT_NET_MASK | SOFTINT_SERIAL_MASK)

#define	ALPHA_ALL_SOFTINTS	(ALPHA_IPL1_SOFTINTS | ALPHA_IPL2_SOFTINTS)

typedef int ipl_t;
typedef struct {
	uint8_t _psl;
} ipl_cookie_t;

static inline ipl_cookie_t
makeiplcookie(ipl_t ipl)
{
	return (ipl_cookie_t){._psl = (uint8_t)ipl};
}

#define	IST_UNUSABLE	-1	/* interrupt cannot be used */
#define	IST_NONE	0	/* none (dummy) */
#define	IST_PULSE	1	/* pulsed */
#define	IST_EDGE	2	/* edge-triggered */
#define	IST_LEVEL	3	/* level-triggered */

#ifdef	_KERNEL

/* IPL-lowering/restoring macros */
void	spllower(int);

#define	splx(s)		spllower(s)
#define	spl0()		spllower(ALPHA_PSL_IPL_0)

/* IPL-raising functions/macros */
static __inline int
_splraise(int s)
{
	int cur = (int)alpha_pal_rdps();
	return (s > cur ? (int)alpha_pal_swpipl(s) : cur);
}

#define	splraiseipl(icookie)	_splraise((icookie)._psl)

#include <sys/spl.h>

/* Fast soft interrupt dispatch. */
void	alpha_softint_dispatch(int);
void	alpha_softint_switchto(struct lwp *, int, struct lwp *);

/*
 * Interprocessor interrupts.  In order how we want them processed.
 */
#define	ALPHA_IPI_HALT			(1UL << 0)
#define	ALPHA_IPI_PRIMARY_CC		(1UL << 1)
#define	ALPHA_IPI_SHOOTDOWN		(1UL << 2)
#define	ALPHA_IPI_AST			(1UL << 3)
#define	ALPHA_IPI_PAUSE			(1UL << 4)
#define	ALPHA_IPI_XCALL			(1UL << 5)
#define	ALPHA_IPI_GENERIC		(1UL << 6)

#define	ALPHA_NIPIS			7	/* must not exceed 64 */

struct cpu_info;
struct trapframe;

void	alpha_ipi_init(struct cpu_info *);
void	alpha_ipi_process(struct cpu_info *, struct trapframe *);
void	alpha_send_ipi(unsigned long, unsigned long);
void	alpha_broadcast_ipi(unsigned long);
void	alpha_multicast_ipi(unsigned long, unsigned long);

/*
 * Alpha shared-interrupt-line common code.
 */

#define	ALPHA_INTR_MPSAFE		0x01

struct alpha_shared_intrhand {
	TAILQ_ENTRY(alpha_shared_intrhand)
		ih_q;
	struct alpha_shared_intr *ih_intrhead;
	int	(*ih_fn)(void *);
	void	*ih_arg;
	int	(*ih_real_fn)(void *);
	void	*ih_real_arg;
	int	ih_level;
	int	ih_type;
	unsigned int ih_num;
};

struct alpha_shared_intr {
	TAILQ_HEAD(,alpha_shared_intrhand)
		intr_q;
	struct evcnt intr_evcnt;
	char	*intr_string;
	void	*intr_private;
	struct cpu_info *intr_cpu;
	int	intr_sharetype;
	int	intr_dfltsharetype;
	int	intr_nstrays;
	int	intr_maxstrays;
};

#define	ALPHA_SHARED_INTR_DISABLE(asi, num)				\
	((asi)[num].intr_maxstrays != 0 &&				\
	 (asi)[num].intr_nstrays == (asi)[num].intr_maxstrays)

struct alpha_shared_intr *alpha_shared_intr_alloc(unsigned int);
int	alpha_shared_intr_dispatch(struct alpha_shared_intr *,
	    unsigned int);
struct alpha_shared_intrhand *
	alpha_shared_intr_alloc_intrhand(struct alpha_shared_intr *,
	    unsigned int, int, int, int, int (*)(void *), void *,
	    const char *);
void	alpha_shared_intr_free_intrhand(struct alpha_shared_intrhand *);
bool	alpha_shared_intr_link(struct alpha_shared_intr *,
	    struct alpha_shared_intrhand *, const char *);
void	alpha_shared_intr_unlink(struct alpha_shared_intr *,
	    struct alpha_shared_intrhand *, const char *);
int	alpha_shared_intr_get_sharetype(struct alpha_shared_intr *,
	    unsigned int);
int	alpha_shared_intr_isactive(struct alpha_shared_intr *,
	    unsigned int);
int	alpha_shared_intr_firstactive(struct alpha_shared_intr *,
	    unsigned int);
void	alpha_shared_intr_set_dfltsharetype(struct alpha_shared_intr *,
	    unsigned int, int);
void	alpha_shared_intr_set_maxstrays(struct alpha_shared_intr *,
	    unsigned int, int);
void	alpha_shared_intr_reset_strays(struct alpha_shared_intr *,
	    unsigned int);
void	alpha_shared_intr_stray(struct alpha_shared_intr *, unsigned int,
	    const char *);
void	alpha_shared_intr_set_private(struct alpha_shared_intr *,
	    unsigned int, void *);
void	*alpha_shared_intr_get_private(struct alpha_shared_intr *,
	    unsigned int);
void	alpha_shared_intr_set_cpu(struct alpha_shared_intr *,
	    unsigned int, struct cpu_info *ci);
struct cpu_info	*
	alpha_shared_intr_get_cpu(struct alpha_shared_intr *,
	    unsigned int);
void	alpha_shared_intr_set_string(struct alpha_shared_intr *,
	    unsigned int, char *);
const char *alpha_shared_intr_string(struct alpha_shared_intr *,
	    unsigned int);
struct evcnt *alpha_shared_intr_evcnt(struct alpha_shared_intr *,
	    unsigned int);

extern struct scbvec scb_iovectab[];
extern void (*alpha_intr_redistribute)(void);

void	scb_init(void);
void	scb_set(u_long, void (*)(void *, u_long), void *);
u_long	scb_alloc(void (*)(void *, u_long), void *);
void	scb_free(u_long);

#define	SCB_ALLOC_FAILED	((u_long) -1)

#endif /* _KERNEL */
#endif /* ! _ALPHA_INTR_H_ */