1/* $NetBSD: intr.h,v 1.39 2016/10/17 18:23:50 jdolecek Exp $ */
2/* NetBSD intr.h,v 1.15 2004/10/31 10:39:34 yamt Exp */
3
4/*-
5 * Copyright (c) 1998, 2001 The NetBSD Foundation, Inc.
6 * All rights reserved.
7 *
8 * This code is derived from software contributed to The NetBSD Foundation
9 * by Charles M. Hannum, and by Jason R. Thorpe.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 * POSSIBILITY OF SUCH DAMAGE.
31 */
32
33#ifndef _XEN_INTR_H_
34#define _XEN_INTR_H_
35
36#include <machine/intrdefs.h>
37
38#ifndef _LOCORE
39#include <xen/xen.h>
40#include <xen/hypervisor.h>
41#include <machine/pic.h>
42#include <sys/evcnt.h>
43
44#include "opt_xen.h"
45
46
47struct cpu_info;
48/*
49 * Struct describing an event channel.
50 */
51
52struct evtsource {
53 int ev_maxlevel; /* max. IPL for this source */
54 uint32_t ev_imask; /* interrupt mask */
55 struct intrhand *ev_handlers; /* handler chain */
56 struct evcnt ev_evcnt; /* interrupt counter */
57 struct cpu_info *ev_cpu; /* cpu on which this event is bound */
58 char ev_evname[32]; /* event counter name */
59};
60
61/*
62 * Structure describing an interrupt level. struct cpu_info has an array of
63 * IPL_MAX of theses. The index in the array is equal to the stub number of
64 * the stubcode as present in vector.s
65 */
66
67struct intrstub {
68#if 0
69 void *ist_entry;
70#endif
71 void *ist_recurse;
72 void *ist_resume;
73};
74
75/* for x86 compatibility */
76extern struct intrstub i8259_stubs[];
77extern struct intrstub ioapic_edge_stubs[];
78extern struct intrstub ioapic_level_stubs[];
79
80struct iplsource {
81 struct intrhand *ipl_handlers; /* handler chain */
82 void *ipl_recurse; /* entry for spllower */
83 void *ipl_resume; /* entry for doreti */
84 struct lwp *ipl_lwp;
85 u_long ipl_evt_mask1; /* pending events for this IPL */
86 u_long ipl_evt_mask2[NR_EVENT_CHANNELS];
87};
88
89
90
91/*
92 * Interrupt handler chains. These are linked in both the evtsource and
93 * the iplsource.
94 * The handler is called with its (single) argument.
95 */
96
97struct intrhand {
98 int (*ih_fun)(void *);
99 void *ih_arg;
100 int ih_level;
101 int (*ih_realfun)(void *);
102 void *ih_realarg;
103 struct intrhand *ih_ipl_next;
104 struct intrhand *ih_evt_next;
105 struct cpu_info *ih_cpu;
106};
107
108struct xen_intr_handle {
109 int pirq; /* also contains the APIC_INT_* flags if NIOAPIC > 0 */
110 int evtch;
111};
112
113extern struct intrstub xenev_stubs[];
114
115#define IUNMASK(ci,level) (ci)->ci_iunmask[(level)]
116
117extern void Xspllower(int);
118
119int splraise(int);
120void spllower(int);
121
122#define SPL_ASSERT_BELOW(x) KDASSERT(curcpu()->ci_ilevel < (x))
123
124/*
125 * Miscellaneous
126 */
127#define spl0() spllower(IPL_NONE)
128#define splx(x) spllower(x)
129
130typedef uint8_t ipl_t;
131typedef struct {
132 ipl_t _ipl;
133} ipl_cookie_t;
134
135static inline ipl_cookie_t
136makeiplcookie(ipl_t ipl)
137{
138
139 return (ipl_cookie_t){._ipl = ipl};
140}
141
142static inline int
143splraiseipl(ipl_cookie_t icookie)
144{
145
146 return splraise(icookie._ipl);
147}
148
149#include <sys/spl.h>
150
151/*
152 * Stub declarations.
153 */
154
155struct pcibus_attach_args;
156
157typedef int intr_handle_t;
158
159#ifdef MULTIPROCESSOR
160int intr_biglock_wrapper(void *);
161#endif
162
163void intr_default_setup(void);
164int x86_nmi(void);
165
166void *intr_establish(int, struct pic *, int, int, int, int (*)(void *), void *, bool);
167void *intr_establish_xname(int, struct pic *, int, int, int, int (*)(void *), void *,
168 bool, const char *);
169void intr_disestablish(struct intrhand *);
170const char *intr_string(intr_handle_t);
171void cpu_intr_init(struct cpu_info *);
172int xen_intr_map(int *, int);
173#ifdef INTRDEBUG
174void intr_printconfig(void);
175#endif
176int intr_find_mpmapping(int, int, struct xen_intr_handle *);
177struct pic *intr_findpic(int);
178void intr_add_pcibus(struct pcibus_attach_args *);
179
180#ifdef MULTIPROCESSOR
181void xen_ipi_init(void);
182int xen_send_ipi(struct cpu_info *, uint32_t);
183void xen_broadcast_ipi(uint32_t);
184#else
185#define xen_ipi_init(_1) ((void) 0) /* nothing */
186#define xen_send_ipi(_i1, _i2) (0) /* nothing */
187#define xen_broadcast_ipi(_i1) ((void) 0) /* nothing */
188#endif /* MULTIPROCESSOR */
189#endif /* !_LOCORE */
190
191#endif /* _XEN_INTR_H_ */
192