intr.h revision 1.2 
1/* $NetBSD: intr.h,v 1.2 2015/03/28 16:13:56 matt Exp $ */
2
3/*-
4 * Copyright (c) 2009, 2010 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Matt Thomas <matt@3am-software.com>.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#ifndef _RISCV_INTR_H_
33#define	_RISCV_INTR_H_
34
35#ifdef _KERNEL_OPT
36#include "opt_multiprocessor.h"
37#endif
38
39/*
40 * This is a common <machine/intr.h> for all RISCV platforms.
41 */
42
43#define	IPL_NONE	0
44#define	IPL_SOFTCLOCK	(IPL_NONE+1)
45#define	IPL_SOFTBIO	(IPL_SOFTCLOCK)	/* shares SWINT with softclock */
46#define	IPL_SOFTNET	(IPL_SOFTBIO+1)
47#define	IPL_SOFTSERIAL	(IPL_SOFTNET)	/* shares SWINT with softnet */
48#define	IPL_VM		(IPL_SOFTSERIAL+1)
49#define	IPL_SCHED	(IPL_VM+1)
50#define	IPL_DDB		(IPL_SCHED+1)
51#define	IPL_HIGH	(IPL_DDB+1)
52
53#define	IPL_SAFEPRI	IPL_SOFTSERIAL
54
55#define	_IPL_N		(IPL_HIGH+1)
56#define	_IPL_NAMES(pfx)	{ pfx"none", pfx"softclock/bio", pfx"softnet/serial", \
57			  pfx"vm", pfx"sched", pfx"ddb", pfx"high" }
58
59#define	IST_UNUSABLE	-1		/* interrupt cannot be used */
60#define	IST_NONE	0		/* none (dummy) */
61#define	IST_PULSE	1		/* pulsed */
62#define	IST_EDGE	2		/* edge-triggered */
63#define	IST_LEVEL	3		/* level-triggered */
64#define	IST_LEVEL_HIGH	4		/* level triggered, active high */
65#define	IST_LEVEL_LOW	5		/* level triggered, active low */
66
67#define	IPI_NOP		0		/* do nothing, interrupt only */
68#define	IPI_AST		1		/* force ast */
69#define	IPI_SHOOTDOWN	2		/* do a tlb shootdown */
70#define	IPI_SYNCICACHE	3		/* sync icache for pages */
71#define	IPI_KPREEMPT	4		/* schedule a kernel preemption */
72#define	IPI_SUSPEND	5		/* DDB suspend signaling */
73#define	IPI_HALT	6		/* halt cpu */
74#define	IPI_XCALL	7		/* xcall */
75#define	IPI_GENERIC	8		/* generic IPI */
76#define	NIPIS		9
77
78#ifdef __INTR_PRIVATE
79#if 0
80struct splsw {
81	int	(*splsw_splhigh)(void);
82	int	(*splsw_splsched)(void);
83	int	(*splsw_splvm)(void);
84	int	(*splsw_splsoftserial)(void);
85	int	(*splsw_splsoftnet)(void);
86	int	(*splsw_splsoftbio)(void);
87	int	(*splsw_splsoftclock)(void);
88	int	(*splsw_splraise)(int);
89	void	(*splsw_spl0)(void);
90	void	(*splsw_splx)(int);
91	int	(*splsw_splhigh_noprof)(void);
92	void	(*splsw_splx_noprof)(int);
93	int	(*splsw_splintr)(uint32_t *);
94	void	(*splsw_splcheck)(void);
95};
96
97struct ipl_sr_map {
98	uint32_t sr_bits[_IPL_N];
99};
100#endif
101#else
102struct splsw;
103#endif /* __INTR_PRIVATE */
104
105typedef int ipl_t;
106typedef struct {
107        ipl_t _spl;
108} ipl_cookie_t;
109
110#ifdef _KERNEL
111
112#if defined(MULTIPROCESSOR) && defined(__HAVE_FAST_SOFTINTS)
113#define __HAVE_PREEMPTION	1
114#define SOFTINT_KPREEMPT	(SOFTINT_COUNT+0)
115#endif
116
117#ifdef __INTR_PRIVATE
118#if 0
119extern	struct splsw	cpu_splsw;
120#endif
121extern	struct ipl_sr_map ipl_sr_map;
122#endif /* __INTR_PRIVATE */
123
124int	splhigh(void);
125int	splhigh_noprof(void);
126int	splsched(void);
127int	splvm(void);
128int	splsoftserial(void);
129int	splsoftnet(void);
130int	splsoftbio(void);
131int	splsoftclock(void);
132int	splraise(int);
133void	splx(int);
134void	splx_noprof(int);
135void	spl0(void);
136int	splintr(uint32_t *);
137
138void	softint_deliver(void);
139
140struct cpu_info;
141
142void	ipi_init(struct cpu_info *);
143void	ipi_process(struct cpu_info *, uint64_t);
144
145/*
146 * These make no sense *NOT* to be inlined.
147 */
148static inline ipl_cookie_t
149makeiplcookie(ipl_t s)
150{
151	return (ipl_cookie_t){._spl = s};
152}
153
154static inline int
155splraiseipl(ipl_cookie_t icookie)
156{
157	return splraise(icookie._spl);
158}
159
160#endif /* _KERNEL */
161#endif /* _RISCV_INTR_H_ */
162