1 | /* $NetBSD: ipi.h,v 1.3 2015/01/18 23:16:35 rmind Exp $ */ |
2 | |
3 | /*- |
4 | * Copyright (c) 2014 The NetBSD Foundation, Inc. |
5 | * All rights reserved. |
6 | * |
7 | * This code is derived from software contributed to The NetBSD Foundation |
8 | * by Mindaugas Rasiukevicius. |
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 _SYS_IPI_H_ |
33 | #define _SYS_IPI_H_ |
34 | |
35 | #if !defined(_KERNEL) && !defined(_KMEMUSER) |
36 | #error "not supposed to be exposed to userland" |
37 | #endif |
38 | |
39 | typedef void (*ipi_func_t)(void *); |
40 | |
41 | typedef struct { |
42 | /* Public: function handler and an argument. */ |
43 | ipi_func_t func; |
44 | void * arg; |
45 | |
46 | /* Private (internal) elements. */ |
47 | volatile u_int _pending; |
48 | } ipi_msg_t; |
49 | |
50 | /* |
51 | * Internal constants and implementation hooks. |
52 | * |
53 | * IPI_MAXREG: the maximum number of asynchronous handlers which can |
54 | * be registered on the system (normally, this should not be high). |
55 | */ |
56 | #define IPI_MAXREG 32 |
57 | |
58 | #define IPI_BITW_SHIFT 5 |
59 | #define IPI_BITW_MASK (32 - 1) |
60 | #define IPI_BITWORDS (IPI_MAXREG >> IPI_BITW_SHIFT) |
61 | |
62 | void ipi_sysinit(void); |
63 | void ipi_cpu_handler(void); |
64 | void cpu_ipi(struct cpu_info *); |
65 | |
66 | /* Public interface: asynchronous IPIs. */ |
67 | u_int ipi_register(ipi_func_t, void *); |
68 | void ipi_unregister(u_int); |
69 | void ipi_trigger(u_int, struct cpu_info *); |
70 | void ipi_trigger_multi(u_int, const kcpuset_t *); |
71 | |
72 | /* Public interface: synchronous IPIs. */ |
73 | void ipi_unicast(ipi_msg_t *, struct cpu_info *); |
74 | void ipi_multicast(ipi_msg_t *, const kcpuset_t *); |
75 | void ipi_broadcast(ipi_msg_t *); |
76 | void ipi_wait(ipi_msg_t *); |
77 | |
78 | #endif |
79 | |