Annotation of sys/arch/hp300/dev/dioreg.h, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: dioreg.h,v 1.4 2007/01/07 15:12:19 miod Exp $ */
2: /* $NetBSD: dioreg.h,v 1.3 1997/01/30 09:18:40 thorpej Exp $ */
3:
4: /*-
5: * Copyright (c) 1996 The NetBSD Foundation, Inc.
6: * All rights reserved.
7: *
8: * This code is derived from software contributed to The NetBSD Foundation
9: * by Jason R. Thorpe.
10: *
11: * Portions of this file are derived from software contributed to Berkeley
12: * by the Systems Programming Group of the University of Utah Computer
13: * Science Department.
14: *
15: * Redistribution and use in source and binary forms, with or without
16: * modification, are permitted provided that the following conditions
17: * are met:
18: * 1. Redistributions of source code must retain the above copyright
19: * notice, this list of conditions and the following disclaimer.
20: * 2. Redistributions in binary form must reproduce the above copyright
21: * notice, this list of conditions and the following disclaimer in the
22: * documentation and/or other materials provided with the distribution.
23: * 3. All advertising materials mentioning features or use of this software
24: * must display the following acknowledgement:
25: * This product includes software developed by the NetBSD
26: * Foundation, Inc. and its contributors.
27: * 4. Neither the name of The NetBSD Foundation nor the names of its
28: * contributors may be used to endorse or promote products derived
29: * from this software without specific prior written permission.
30: *
31: * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
32: * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
33: * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
34: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
35: * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
36: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
37: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
38: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
39: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
40: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
41: * POSSIBILITY OF SUCH DAMAGE.
42: */
43:
44: /*
45: * Register definitions for the DIO and DIO-II bus.
46: */
47:
48: /*
49: * DIO/DIO-II device registers, offsets from base of device. All
50: * registers are 8-bit.
51: */
52: #define DIO_IDOFF 0x01 /* primary device id */
53: #define DIO_IPLOFF 0x03 /* interrupt level */
54: #define DIO_SECIDOFF 0x15 /* secondary device id */
55: #define DIOII_SIZEOFF 0x101 /* device size */
56:
57: /*
58: * System physical addresses of some `special' DIO devices.
59: */
60: #define DIO_IHPIBADDR 0x478000 /* internal HP-IB; select code 7 */
61:
62: /*
63: * DIO ranges from select codes 0-63 at physical addresses given by:
64: * 0x600000 + (sc - 32) * 0x10000
65: * DIO cards are addressed in the range 0-31 [0x600000-0x800000) for
66: * their control space and the remaining areas, [0x200000-0x400000) and
67: * [0x800000-0x1000000), are for additional space required by a card;
68: * e.g. a display framebuffer.
69: *
70: * DIO-II ranges from select codes 132-255 at physical addresses given by:
71: * 0x1000000 + (sc - 132) * 0x400000
72: * The address range of DIO-II space is thus [0x1000000-0x20000000).
73: *
74: * DIO/DIO-II space is too large to map in its entirety, instead devices
75: * are mapped into kernel virtual address space allocated from a range
76: * of EIOMAPSIZE pages (vmparam.h) starting at ``extiobase''.
77: */
78: #define DIO_BASE 0x600000 /* start of DIO space */
79: #define DIO_END 0x1000000 /* end of DIO space */
80: #define DIO_DEVSIZE 0x10000 /* size of a DIO device */
81:
82: #define DIOII_BASE 0x01000000 /* start of DIO-II space */
83: #define DIOII_END 0x20000000 /* end of DIO-II space */
84: #define DIOII_DEVSIZE 0x00400000 /* size of a DIO-II device */
85:
86: /*
87: * Find the highest select code for a given machine; HP320 doesn't
88: * have DIO-II.
89: */
90: #if defined(HP320)
91: #define DIO_SCMAX(machineid) ((machineid) == HP_320 ? 32 : 256)
92: #else
93: #define DIO_SCMAX(machineid) 256
94: #endif
95:
96: /*
97: * Base of DIO-II select codes.
98: */
99: #define DIOII_SCBASE 132
100:
101: /*
102: * Macro that returns true if a select code lies within
103: * the select code `hole'.
104: */
105: #define DIO_INHOLE(scode) ((scode) >= 32 && (scode) < DIOII_SCBASE)
106:
107: /*
108: * Macros to determine if device is DIO or DIO-II.
109: */
110: #define DIO_ISDIO(scode) ((scode) >= 0 && (scode) < 32)
111: #define DIO_ISDIOII(scode) ((scode) >= DIOII_SCBASE && (scode) < 256)
112:
113: /*
114: * Macro to determine if device is a framebuffer, given the
115: * primary id of the device. We key off this to determine if
116: * we should look at secondary id and ignore interrupt level.
117: */
118: #define DIO_ISFRAMEBUFFER(id) \
119: ((id) == DIO_DEVICE_ID_FRAMEBUFFER)
120:
121: /*
122: * Macro to extract primary and decondary device ids, given
123: * the base address of the device.
124: */
125: #define DIO_ID(base) \
126: (*((u_int8_t *)((u_long)(base) + DIO_IDOFF)))
127: #define DIO_SECID(base) \
128: (*((u_int8_t *)((u_long)(base) + DIO_SECIDOFF)))
129:
130: /*
131: * Macro to extract the interrupt level, given the
132: * base address of the device.
133: */
134: #define DIO_IPL(base) \
135: ((((*((u_int8_t *)((u_long)(base) + DIO_IPLOFF))) >> 4) & 0x03) + 3)
136:
137: /*
138: * Macro to compute the size of a DIO-II device's address
139: * space, given the base address of the device.
140: */
141: #define DIOII_SIZE(base) \
142: ((int)((*((u_int8_t *)((u_long)(base) + DIOII_SIZEOFF)) + 1) \
143: * 0x100000))
144:
145: /*
146: * Given a select code and device base address, compute
147: * the size of the DIO/DIO-II device.
148: */
149: #define DIO_SIZE(scode, base) \
150: (DIO_ISDIOII((scode)) ? DIOII_SIZE((base)) : DIO_DEVSIZE)
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