Annotation of sys/arch/mac68k/include/intr.h, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: intr.h,v 1.17 2007/07/29 21:24:05 miod Exp $ */
2: /* $NetBSD: intr.h,v 1.9 1998/08/12 06:58:42 scottr Exp $ */
3:
4: /*
5: * Copyright (C) 1997 Scott Reynolds
6: * All rights reserved.
7: *
8: * Redistribution and use in source and binary forms, with or without
9: * modification, are permitted provided that the following conditions
10: * are met:
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
16: * 3. The name of the author may not be used to endorse or promote products
17: * derived from this software without specific prior written permission.
18: *
19: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
20: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
21: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
23: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
24: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
28: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29: */
30:
31: #ifndef _MAC68K_INTR_H_
32: #define _MAC68K_INTR_H_
33:
34: #include <machine/psl.h>
35:
36: #ifdef _KERNEL
37:
38: /*
39: * splnet must block hardware network interrupts
40: * splvm must be > spltty
41: */
42: extern u_short mac68k_ttyipl;
43: extern u_short mac68k_netipl;
44: extern u_short mac68k_vmipl;
45: extern u_short mac68k_audioipl;
46: extern u_short mac68k_clockipl;
47: extern u_short mac68k_statclockipl;
48:
49: /*
50: * Interrupt "levels". These are a more abstract representation
51: * of interrupt levels, and do not have the same meaning as m68k
52: * CPU interrupt levels. They serve two purposes:
53: *
54: * - properly order ISRs in the list for that CPU ipl
55: * - compute CPU PSL values for the spl*() calls.
56: */
57: #define IPL_NONE 0
58: #define IPL_SOFTNET 1
59: #define IPL_SOFTCLOCK 1
60: #define IPL_BIO 2
61: #define IPL_NET PSLTOIPL(mac68k_netipl)
62: #define IPL_TTY PSLTOIPL(mac68k_ttyipl)
63: #define IPL_CLOCK PSLTOIPL(mac68k_clockipl)
64: #define IPL_STATCLOCK PSLTOIPL(mac68k_statclockipl)
65: #define IPL_HIGH 7
66:
67: /*
68: * These should be used for:
69: * 1) ensuring mutual exclusion (why use processor level?)
70: * 2) allowing faster devices to take priority
71: *
72: * Note that on the Mac, most things are masked at spl1, almost
73: * everything at spl2, and everything but the panic switch and
74: * power at spl4.
75: */
76: #define splsoft() _splraise(PSL_S | PSL_IPL1)
77: #define splsoftclock() splsoft()
78: #define splsoftnet() splsoft()
79: #define spltty() _splraise(mac68k_ttyipl)
80: #define splbio() _splraise(PSL_S | PSL_IPL2)
81: #define splnet() _splraise(mac68k_netipl)
82: #define splvm() _splraise(mac68k_vmipl)
83: #define splaudio() _splraise(mac68k_audioipl)
84: #define splclock() _splraise(mac68k_clockipl)
85: #define splstatclock() _splraise(mac68k_statclockipl)
86: #define splserial() _splraise(PSL_S | PSL_IPL4)
87: #define splhigh() _spl(PSL_S | PSL_IPL7)
88: #define splsched() splhigh()
89:
90: /* These spl calls are _not_ to be used by machine-independent code. */
91: #define spladb() splhigh()
92: #define splzs() splserial()
93:
94: /* watch out for side effects */
95: #define splx(s) ((s) & PSL_IPL ? _spl(s) : spl0())
96:
97: /*
98: * simulated software interrupt register
99: */
100: extern volatile u_int8_t ssir;
101:
102: #define SIR_NET 0x01
103: #define SIR_CLOCK 0x02
104: #define SIR_SERIAL 0x04
105: #define SIR_ADB 0x08
106:
107: #define siron(mask) \
108: __asm __volatile ( "orb %1,%0" : "=m" (ssir) : "i" (mask))
109: #define siroff(mask) \
110: __asm __volatile ( "andb %1,%0" : "=m" (ssir) : "ir" (~(mask)))
111:
112: #define setsoftnet() siron(SIR_NET)
113: #define setsoftclock() siron(SIR_CLOCK)
114: #define setsoftserial() siron(SIR_SERIAL)
115: #define setsoftadb() siron(SIR_ADB)
116:
117: /* intr.c */
118: void intr_init(void);
119: void intr_establish(int (*)(void *), void *, int, const char *);
120: void intr_disestablish(int);
121: void intr_dispatch(int);
122:
123: /* locore.s */
124: int spl0(void);
125:
126: /*
127: * Interrupt handler.
128: * There is no support for shared interrupts at the moment.
129: */
130: #include <sys/evcount.h>
131: struct intrhand {
132: int (*ih_fn)(void *);
133: void *ih_arg;
134: int ih_ipl;
135: struct evcount ih_count;
136: };
137: #endif /* _KERNEL */
138:
139: #endif /* _MAC68K_INTR_H_ */
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