Annotation of sys/arch/mvme68k/dev/if_ie.h, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: if_ie.h,v 1.5 2003/06/02 05:09:14 deraadt Exp $ */
2:
3: /* Copyright (c) 1998 Steve Murphree, Jr.
4: * Copyright (c) 1995 Theo de Raadt
5: * All rights reserved.
6: *
7: * Redistribution and use in source and binary forms, with or without
8: * modification, are permitted provided that the following conditions
9: * are met:
10: * 1. Redistributions of source code must retain the above copyright
11: * notice, this list of conditions and the following disclaimer.
12: * 2. Redistributions in binary form must reproduce the above copyright
13: * notice, this list of conditions and the following disclaimer in the
14: * documentation and/or other materials provided with the distribution.
15: *
16: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26: */
27:
28: /*
29: * XXX where else is this from?
30: * if_sunie.h
31: *
32: * sun's ie interface
33: */
34:
35: /*
36: * programming notes:
37: *
38: * the ie chip operates in a 24 bit address space.
39: *
40: * most ie interfaces appear to be divided into two parts:
41: * - generic 586 stuff
42: * - board specific
43: *
44: * generic:
45: * the generic stuff of the ie chip is all done with data structures
46: * that live in the chip's memory address space. the chip expects
47: * its main data structure (the sys conf ptr -- SCP) to be at a
48: * address loaded into the chip at init.
49: *
50: * the SCP points to another structure called the ISCP.
51: * the ISCP points to another structure called the SCB.
52: * the SCB has a status field, a linked list of "commands", and
53: * a linked list of "receive buffers". these are data structures that
54: * live in memory, not registers.
55: *
56: * board:
57: * to get the chip to do anything, you first put a command in the
58: * command data structure list. then you have to signal "attention"
59: * to the chip to get it to look at the command. how you
60: * signal attention depends on what board you have... on PC's
61: * there is an i/o port number to do this, on sun's there is a
62: * register bit you toggle.
63: *
64: * to get data from the chip you program it to interrupt...
65: *
66: * the VME boards lives in vme16 space. only 16 and 8 bit accesses
67: * are allowed, so functions that copy data must be aware of this.
68: *
69: * the chip is an intel chip. this means that the byte order
70: * on all the "short"s in the chip's data structures is wrong.
71: * so, constants described in the intel docs are swapped for the sun.
72: * that means that any buffer pointers you give the chip must be
73: * swapped to intel format. yuck.
74: *
75: */
76:
77: /*
78: * PART 1: VME/multibus defs
79: */
80: #define IEVME_PAGESIZE 1024 /* bytes */
81: #define IEVME_PAGSHIFT 10 /* bits */
82: #define IEVME_NPAGES 256 /* number of pages on chip */
83: #define IEVME_MAPSZ 1024 /* number of entries in the map */
84:
85: /*
86: * PTE for the page map
87: */
88: #define IEVME_SBORDR 0x8000 /* sun byte order */
89: #define IEVME_IBORDR 0x0000 /* intel byte ordr */
90:
91: #define IEVME_P2MEM 0x2000 /* memory is on P2 */
92: #define IEVME_OBMEM 0x0000 /* memory is on board */
93:
94: #define IEVME_PGMASK 0x0fff /* gives the physical page frame number */
95:
96: struct ievme {
97: u_short pgmap[IEVME_MAPSZ];
98: u_short xxx[32]; /* prom */
99: u_short status; /* see below for bits */
100: u_short xxx2; /* filler */
101: u_short pectrl; /* parity control (see below) */
102: u_short peaddr; /* low 16 bits of address */
103: };
104:
105: /*
106: * status bits
107: */
108: #define IEVME_RESET 0x8000 /* reset board */
109: #define IEVME_ONAIR 0x4000 /* go out of loopback 'on-air' */
110: #define IEVME_ATTEN 0x2000 /* attention */
111: #define IEVME_IENAB 0x1000 /* interrupt enable */
112: #define IEVME_PEINT 0x0800 /* parity error interrupt enable */
113: #define IEVME_PERR 0x0200 /* parity error flag */
114: #define IEVME_INT 0x0100 /* interrupt flag */
115: #define IEVME_P2EN 0x0020 /* enable p2 bus */
116: #define IEVME_256K 0x0010 /* 256kb rams */
117: #define IEVME_HADDR 0x000f /* mask for bits 17-20 of address */
118:
119: /*
120: * parity control
121: */
122: #define IEVME_PARACK 0x0100 /* parity error ack */
123: #define IEVME_PARSRC 0x0080 /* parity error source */
124: #define IEVME_PAREND 0x0040 /* which end of the data got the error */
125: #define IEVME_PARADR 0x000f /* mask to get bits 17-20 of parity address */
126:
127:
128: /*
129: * PART 2: the on-board interface
130: */
131: struct ieob {
132: u_short porthigh;
133: u_short portlow;
134: u_long attn;
135: };
136: #define IE_PORT_NEWSCPADDR 0x00000002
137: #define IE_PORT_RESET 0x00000000
138:
139: #define IEOB_ADBASE 0xff000000 /* KVA base addr of 24 bit address space */
140:
141: /*
142: * PART 3: the 3E board
143: */
144:
145: /*
146: * not supported (yet?)
147: */
148:
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