Annotation of sys/arch/vax/mscp/mscpreg.h, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: mscpreg.h,v 1.5 2003/06/02 23:27:57 millert Exp $ */
2: /* $NetBSD: mscpreg.h,v 1.4 1999/05/29 19:12:53 ragge Exp $ */
3: /*
4: * Copyright (c) 1996 Ludd, University of Lule}, Sweden.
5: * Copyright (c) 1988 Regents of the University of California.
6: * All rights reserved.
7: *
8: * This code is derived from software contributed to Berkeley by
9: * Chris Torek.
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: * 3. Neither the name of the University nor the names of its contributors
20: * may be used to endorse or promote products derived from this software
21: * without specific prior written permission.
22: *
23: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33: * SUCH DAMAGE.
34: *
35: * @(#)udareg.h 7.3 (Berkeley) 5/8/91
36: */
37:
38: /*
39: * NRSPL2 and NCMDL2 control the number of response and command
40: * packets respectively. They may be any value from 0 to 7, though
41: * setting them higher than 5 is unlikely to be of any value.
42: * If you get warnings about your command ring being too small,
43: * try increasing the values by one.
44: */
45: #ifndef NRSP
46: #define NRSPL2 5
47: #define NCMDL2 5
48: #define NRSP (1 << NRSPL2)
49: #define NCMD (1 << NCMDL2)
50: #endif
51:
52: /*
53: * Communication area definition. This seems to be the same for
54: * all types of MSCP controllers.
55: */
56:
57: struct mscp_ca {
58: short ca_xxx1; /* unused */
59: char ca_xxx2; /* unused */
60: char ca_bdp; /* BDP to purge */
61: short ca_cmdint; /* command ring transition flag */
62: short ca_rspint; /* response ring transition flag */
63: long ca_rspdsc[NRSP];/* response descriptors */
64: long ca_cmddsc[NCMD];/* command descriptors */
65: };
66:
67: /*
68: * Simplified routines (e.g., uddump) reprogram the UDA50 for one command
69: * and one response at a time; uda1ca is like udaca except that it provides
70: * exactly one command and response descriptor.
71: */
72: struct mscp_1ca {
73: short ca_xxx1;
74: char ca_xxx2;
75: char ca_bdp;
76: short ca_cmdint;
77: short ca_rspint;
78: long ca_rspdsc;
79: long ca_cmddsc;
80: };
81:
82: /*
83: * Combined communications area and MSCP packet pools, per controller.
84: * NRSP and NCMD must be defined before this struct is used.
85: */
86:
87: struct mscp_pack {
88: struct mscp_ca mp_ca; /* communications area */
89: struct mscp mp_rsp[NRSP]; /* response packets */
90: struct mscp mp_cmd[NCMD]; /* command packets */
91: };
92:
93: /*
94: * Bits in UDA status register during initialisation
95: */
96: #define MP_ERR 0x8000 /* error */
97: #define MP_STEP4 0x4000 /* step 4 has started */
98: #define MP_STEP3 0x2000 /* step 3 has started */
99: #define MP_STEP2 0x1000 /* step 2 has started */
100: #define MP_STEP1 0x0800 /* step 1 has started */
101: #define MP_NV 0x0400 /* no host settable interrupt vector */
102: #define MP_QB 0x0200 /* controller supports Q22 bus */
103: #define MP_DI 0x0100 /* controller implements diagnostics */
104: #define MP_IE 0x0080 /* interrupt enable */
105: #define MP_NCNRMASK 0x003f /* in STEP1, bits 0-2=NCMDL2, 3-5=NRSPL2 */
106: #define MP_IVECMASK 0x007f /* in STEP2, bits 0-6 are interruptvec / 4 */
107: #define MP_PI 0x0001 /* host requests adapter purge interrupts */
108: #define MP_GO 0x0001 /* Go command to ctlr */
109:
110: #define ALLSTEPS (MP_ERR | MP_STEP4 | MP_STEP3 | MP_STEP2 | MP_STEP1)
111:
112: #define STEP0MASK (ALLSTEPS | MP_NV)
113:
114: #define STEP1MASK (ALLSTEPS | MP_IE | MP_NCNRMASK)
115: #define STEP1GOOD (MP_STEP2 | MP_IE | (NCMDL2 << 3) | NRSPL2)
116:
117: #define STEP2MASK (ALLSTEPS | MP_IE | MP_IVECMASK)
118: #define STEP2GOOD(iv) (MP_STEP3 | MP_IE | (iv))
119:
120: #define STEP3MASK ALLSTEPS
121: #define STEP3GOOD MP_STEP4
122:
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