Annotation of sys/arch/mvme68k/dev/if_ie.h, Revision 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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