isa_machdep.h revision 1.10
1/* $NetBSD: isa_machdep.h,v 1.6 1996/05/03 19:14:56 christos Exp $ */ 2 3/*- 4 * Copyright (c) 1990 The Regents of the University of California. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * William Jolitz. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)isa.h 5.7 (Berkeley) 5/9/91 39 */ 40 41/* 42 * Various pieces of the i386 port want to include this file without 43 * or in spite of using isavar.h, and should be fixed. 44 */ 45 46#ifndef _I386_ISA_MACHDEP_H_ /* XXX */ 47#define _I386_ISA_MACHDEP_H_ /* XXX */ 48 49/* 50 * XXX THIS FILE IS A MESS. copyright: berkeley's probably. 51 * contents from isavar.h and isareg.h, mostly the latter. 52 * perhaps charles's? 53 * 54 * copyright from berkeley's isa.h which is now dev/isa/isareg.h. 55 */ 56 57/* 58 * Types provided to machine-independent ISA code. 59 */ 60typedef void *isa_chipset_tag_t; 61 62struct device; /* XXX */ 63struct isabus_attach_args; /* XXX */ 64 65/* 66 * Functions provided to machine-independent ISA code. 67 */ 68void isa_attach_hook __P((struct device *, struct device *, 69 struct isabus_attach_args *)); 70void *isa_intr_establish __P((isa_chipset_tag_t ic, int irq, int type, 71 int level, int (*ih_fun)(void *), void *ih_arg, char *ih_what)); 72void isa_intr_disestablish __P((isa_chipset_tag_t ic, void *handler)); 73 74/* 75 * ALL OF THE FOLLOWING ARE MACHINE-DEPENDENT, AND SHOULD NOT BE USED 76 * BY PORTABLE CODE. 77 */ 78/* 79 * XXX Various seemingly PC-specific constants, some of which may be 80 * unnecessary anyway. 81 */ 82 83/* 84 * RAM Physical Address Space (ignoring the above mentioned "hole") 85 */ 86#define RAM_BEGIN 0x0000000 /* Start of RAM Memory */ 87#define RAM_END 0x1000000 /* End of RAM Memory */ 88#define RAM_SIZE (RAM_END - RAM_BEGIN) 89 90/* 91 * Oddball Physical Memory Addresses 92 */ 93#define COMPAQ_RAMRELOC 0x80c00000 /* Compaq RAM relocation/diag */ 94#define COMPAQ_RAMSETUP 0x80c00002 /* Compaq RAM setup */ 95#define WEITEK_FPU 0xC0000000 /* WTL 2167 */ 96#define CYRIX_EMC 0xC0000000 /* Cyrix EMC */ 97 98/* 99 * stuff that used to be in pccons.c 100 */ 101#define MONO_BUF 0xB0000 102#define CGA_BUF 0xB8000 103#define IOPHYSMEM 0xA0000 104 105 106/* 107 * ISA DMA bounce buffers. 108 * XXX should be made partially machine- and bus-mapping-independent. 109 * 110 * DMA_BOUNCE is the number of pages of low-addressed physical memory 111 * to acquire for ISA bounce buffers. If physical memory below 16 MB 112 * then DMA_BOUNCE_LOW will be used. 113 */ 114 115#ifndef DMA_BOUNCE 116#define DMA_BOUNCE 48 /* number of pages if memory > 16M */ 117#endif 118 119#ifndef DMA_BOUNCE_LOW 120#define DMA_BOUNCE_LOW 16 /* number of pages if memory <= 16M */ 121#endif 122 123/* 124 * Variables and macros to deal with the ISA I/O hole. 125 * XXX These should be converted to machine- and bus-mapping-independent 126 * function definitions, invoked through the softc. 127 */ 128 129extern u_long atdevbase; /* kernel virtual address of "hole" */ 130 131/* 132 * Given a kernel virtual address for some location 133 * in the "hole" I/O space, return a physical address. 134 */ 135#define ISA_PHYSADDR(v) ((void *) ((u_long)(v) - atdevbase + IOM_BEGIN)) 136 137/* 138 * Given a physical address in the "hole", 139 * return a kernel virtual address. 140 */ 141#define ISA_HOLE_VADDR(p) ((void *) ((u_long)(p) - IOM_BEGIN + atdevbase)) 142 143 144/* 145 * Miscellanous functions. 146 */ 147void sysbeep __P((int, int)); /* beep with the system speaker */ 148void isadma_init __P((void)); 149 150#endif /* _I386_ISA_MACHDEP_H_ XXX */ 151