FreeBSD/Linux Kernel Cross Reference
sys/i386/include/ipl.h
1 /*-
2 * Copyright (c) 1993 The Regents of the University of California.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * $FreeBSD$
34 */
35
36 #ifndef _MACHINE_IPL_H_
37 #define _MACHINE_IPL_H_
38
39 #ifdef APIC_IO
40 #include <i386/isa/apic_ipl.h>
41 #else
42 #include <i386/isa/icu_ipl.h>
43 #endif
44
45 /*
46 * Software interrupt bit numbers in priority order. The priority only
47 * determines which swi will be dispatched next; a higher priority swi
48 * may be dispatched when a nested h/w interrupt handler returns.
49 */
50 #define SWI_TTY (NHWI + 0)
51 #define SWI_NET (NHWI + 1)
52 #define SWI_CAMNET (NHWI + 2)
53 #define SWI_CAMBIO (NHWI + 3)
54 #define SWI_VM (NHWI + 4)
55 #define SWI_CLOCK 30
56 #define SWI_AST 31
57 #define NSWI (32 - NHWI)
58
59 /*
60 * Corresponding interrupt-pending bits for ipending.
61 */
62 #define SWI_TTY_PENDING (1 << SWI_TTY)
63 #define SWI_NET_PENDING (1 << SWI_NET)
64 #define SWI_CAMNET_PENDING (1 << SWI_CAMNET)
65 #define SWI_CAMBIO_PENDING (1 << SWI_CAMBIO)
66 #define SWI_VM_PENDING (1 << SWI_VM)
67 #define SWI_CLOCK_PENDING (1 << SWI_CLOCK)
68 #define SWI_AST_PENDING (1 << SWI_AST)
69
70 /*
71 * Corresponding interrupt-disable masks for cpl. The ordering is now by
72 * inclusion (where each mask is considered as a set of bits). Everything
73 * except SWI_AST_MASK includes SWI_CLOCK_MASK so that softclock() doesn't
74 * run while other swi handlers are running and timeout routines can call
75 * swi handlers. Everything includes SWI_AST_MASK so that AST's are masked
76 * until just before return to user mode. SWI_TTY_MASK includes SWI_NET_MASK
77 * in case tty interrupts are processed at splsofttty() for a tty that is in
78 * SLIP or PPP line discipline (this is weaker than merging net_imask with
79 * tty_imask in isa.c - splimp() must mask hard and soft tty interrupts, but
80 * spltty() apparently only needs to mask soft net interrupts).
81 */
82 #define SWI_TTY_MASK (SWI_TTY_PENDING | SWI_CLOCK_MASK | SWI_NET_MASK)
83 #define SWI_CAMNET_MASK (SWI_CAMNET_PENDING | SWI_CLOCK_MASK)
84 #define SWI_CAMBIO_MASK (SWI_CAMBIO_PENDING | SWI_CLOCK_MASK)
85 #define SWI_NET_MASK (SWI_NET_PENDING | SWI_CLOCK_MASK)
86 #define SWI_VM_MASK (SWI_VM_PENDING | SWI_CLOCK_MASK)
87 #define SWI_CLOCK_MASK (SWI_CLOCK_PENDING | SWI_AST_MASK)
88 #define SWI_AST_MASK SWI_AST_PENDING
89 #define SWI_MASK (~HWI_MASK)
90
91 #ifndef LOCORE
92
93 /*
94 * cpl is preserved by interrupt handlers so it is effectively nonvolatile.
95 * ipending and idelayed are changed by interrupt handlers so they are
96 * volatile.
97 */
98 #ifdef notyet /* in <sys/interrupt.h> until pci drivers stop hacking on them */
99 extern unsigned bio_imask; /* group of interrupts masked with splbio() */
100 #endif
101 extern unsigned cpl; /* current priority level mask */
102 #ifdef SMP
103 extern unsigned cil; /* current INTerrupt level mask */
104 #endif
105 extern volatile unsigned idelayed; /* interrupts to become pending */
106 extern volatile unsigned ipending; /* active interrupts masked by cpl */
107 #ifdef notyet /* in <sys/systm.h> until pci drivers stop hacking on them */
108 extern unsigned net_imask; /* group of interrupts masked with splimp() */
109 extern unsigned stat_imask; /* interrupts masked with splstatclock() */
110 extern unsigned tty_imask; /* group of interrupts masked with spltty() */
111 #endif
112
113 #endif /* !LOCORE */
114
115 #endif /* !_MACHINE_IPL_H_ */
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