Annotation of sys/arch/i386/isa/isa_machdep.h, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: isa_machdep.h,v 1.21 2006/02/12 19:55:39 miod Exp $ */
! 2: /* $NetBSD: isa_machdep.h,v 1.7 1997/06/06 23:28:42 thorpej Exp $ */
! 3:
! 4: /*-
! 5: * Copyright (c) 1996, 1997 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 of the Numerical Aerospace Simulation Facility,
! 10: * NASA Ames Research Center.
! 11: *
! 12: * Redistribution and use in source and binary forms, with or without
! 13: * modification, are permitted provided that the following conditions
! 14: * are met:
! 15: * 1. Redistributions of source code must retain the above copyright
! 16: * notice, this list of conditions and the following disclaimer.
! 17: * 2. Redistributions in binary form must reproduce the above copyright
! 18: * notice, this list of conditions and the following disclaimer in the
! 19: * documentation and/or other materials provided with the distribution.
! 20: * 3. All advertising materials mentioning features or use of this software
! 21: * must display the following acknowledgement:
! 22: * This product includes software developed by the NetBSD
! 23: * Foundation, Inc. and its contributors.
! 24: * 4. Neither the name of The NetBSD Foundation nor the names of its
! 25: * contributors may be used to endorse or promote products derived
! 26: * from this software without specific prior written permission.
! 27: *
! 28: * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
! 29: * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
! 30: * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
! 31: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
! 32: * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
! 33: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
! 34: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
! 35: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
! 36: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
! 37: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
! 38: * POSSIBILITY OF SUCH DAMAGE.
! 39: */
! 40:
! 41: /*-
! 42: * Copyright (c) 1990 The Regents of the University of California.
! 43: * All rights reserved.
! 44: *
! 45: * This code is derived from software contributed to Berkeley by
! 46: * William Jolitz.
! 47: *
! 48: * Redistribution and use in source and binary forms, with or without
! 49: * modification, are permitted provided that the following conditions
! 50: * are met:
! 51: * 1. Redistributions of source code must retain the above copyright
! 52: * notice, this list of conditions and the following disclaimer.
! 53: * 2. Redistributions in binary form must reproduce the above copyright
! 54: * notice, this list of conditions and the following disclaimer in the
! 55: * documentation and/or other materials provided with the distribution.
! 56: * 3. Neither the name of the University nor the names of its contributors
! 57: * may be used to endorse or promote products derived from this software
! 58: * without specific prior written permission.
! 59: *
! 60: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
! 61: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 62: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 63: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 64: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 65: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 66: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 67: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 68: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 69: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 70: * SUCH DAMAGE.
! 71: *
! 72: * @(#)isa.h 5.7 (Berkeley) 5/9/91
! 73: */
! 74:
! 75: /*
! 76: * Various pieces of the i386 port want to include this file without
! 77: * or in spite of using isavar.h, and should be fixed.
! 78: */
! 79:
! 80: #ifndef _I386_ISA_MACHDEP_H_ /* XXX */
! 81: #define _I386_ISA_MACHDEP_H_ /* XXX */
! 82:
! 83: #include <machine/bus.h>
! 84:
! 85: /*
! 86: * ISA can only DMA to 0-16M.
! 87: */
! 88: #define ISA_DMA_BOUNCE_THRESHOLD 0x00ffffff
! 89:
! 90: /*
! 91: * XXX THIS FILE IS A MESS. copyright: berkeley's probably.
! 92: * contents from isavar.h and isareg.h, mostly the latter.
! 93: * perhaps charles's?
! 94: *
! 95: * copyright from berkeley's isa.h which is now dev/isa/isareg.h.
! 96: */
! 97:
! 98: /*
! 99: * Types provided to machine-independent ISA code.
! 100: */
! 101: typedef void *isa_chipset_tag_t;
! 102:
! 103: struct device; /* XXX */
! 104: struct isabus_attach_args; /* XXX */
! 105:
! 106: /*
! 107: * Functions provided to machine-independent ISA code.
! 108: */
! 109: void isa_attach_hook(struct device *, struct device *,
! 110: struct isabus_attach_args *);
! 111: int isa_intr_alloc(isa_chipset_tag_t, int, int, int *);
! 112: int isa_intr_check(isa_chipset_tag_t, int, int);
! 113: void *isa_intr_establish(isa_chipset_tag_t ic, int irq, int type,
! 114: int level, int (*ih_fun)(void *), void *ih_arg, char *ih_what);
! 115: void isa_intr_disestablish(isa_chipset_tag_t ic, void *handler);
! 116:
! 117: /*
! 118: * ALL OF THE FOLLOWING ARE MACHINE-DEPENDENT, AND SHOULD NOT BE USED
! 119: * BY PORTABLE CODE.
! 120: */
! 121:
! 122: extern struct i386_bus_dma_tag isa_bus_dma_tag;
! 123:
! 124: /*
! 125: * Cookie used by ISA dma. A pointer to one of these it stashed in
! 126: * the DMA map.
! 127: */
! 128: struct i386_isa_dma_cookie {
! 129: int id_flags; /* flags; see below */
! 130:
! 131: void *id_origbuf; /* pointer to orig buffer if
! 132: bouncing */
! 133: bus_size_t id_origbuflen; /* ...and size */
! 134:
! 135: void *id_bouncebuf; /* pointer to the bounce buffer */
! 136: bus_size_t id_bouncebuflen; /* ...and size */
! 137: int id_nbouncesegs; /* number of valid bounce segs */
! 138: bus_dma_segment_t id_bouncesegs[0]; /* array of bounce buffer
! 139: physical memory segments */
! 140: };
! 141:
! 142: /* id_flags */
! 143: #define ID_MIGHT_NEED_BOUNCE 0x01 /* map could need bounce buffers */
! 144: #define ID_HAS_BOUNCE 0x02 /* map currently has bounce buffers */
! 145: #define ID_IS_BOUNCING 0x04 /* map is bouncing current xfer */
! 146:
! 147: /*
! 148: * XXX Various seemingly PC-specific constants, some of which may be
! 149: * unnecessary anyway.
! 150: */
! 151:
! 152: /*
! 153: * RAM Physical Address Space (ignoring the above mentioned "hole")
! 154: */
! 155: #define RAM_BEGIN 0x0000000 /* Start of RAM Memory */
! 156: #define RAM_END 0x1000000 /* End of RAM Memory */
! 157: #define RAM_SIZE (RAM_END - RAM_BEGIN)
! 158:
! 159: /*
! 160: * Oddball Physical Memory Addresses
! 161: */
! 162: #define COMPAQ_RAMRELOC 0x80c00000 /* Compaq RAM relocation/diag */
! 163: #define COMPAQ_RAMSETUP 0x80c00002 /* Compaq RAM setup */
! 164: #define WEITEK_FPU 0xC0000000 /* WTL 2167 */
! 165: #define CYRIX_EMC 0xC0000000 /* Cyrix EMC */
! 166:
! 167: /*
! 168: * stuff that used to be in pccons.c
! 169: */
! 170: #define MONO_BUF 0xB0000
! 171: #define CGA_BUF 0xB8000
! 172: #define IOPHYSMEM 0xA0000
! 173:
! 174:
! 175: /*
! 176: * ISA DMA bounce buffers.
! 177: * XXX should be made partially machine- and bus-mapping-independent.
! 178: *
! 179: * DMA_BOUNCE is the number of pages of low-addressed physical memory
! 180: * to acquire for ISA bounce buffers. If physical memory below 16 MB
! 181: * then DMA_BOUNCE_LOW will be used.
! 182: *
! 183: * isaphysmem is the address of this physical contiguous low memory.
! 184: * isaphysmempgs is the number of pages allocated.
! 185: */
! 186:
! 187: #ifndef DMA_BOUNCE
! 188: #define DMA_BOUNCE 48 /* number of pages if memory > 16M */
! 189: #endif
! 190:
! 191: #ifndef DMA_BOUNCE_LOW
! 192: #define DMA_BOUNCE_LOW 16 /* number of pages if memory <= 16M */
! 193: #endif
! 194:
! 195: extern vaddr_t isaphysmem;
! 196: extern int isaphysmempgs;
! 197:
! 198:
! 199: /*
! 200: * Variables and macros to deal with the ISA I/O hole.
! 201: * XXX These should be converted to machine- and bus-mapping-independent
! 202: * function definitions, invoked through the softc.
! 203: */
! 204:
! 205: extern u_long atdevbase; /* kernel virtual address of "hole" */
! 206:
! 207: /*
! 208: * Given a kernel virtual address for some location
! 209: * in the "hole" I/O space, return a physical address.
! 210: */
! 211: #define ISA_PHYSADDR(v) ((void *) ((u_long)(v) - atdevbase + IOM_BEGIN))
! 212:
! 213: /*
! 214: * Given a physical address in the "hole",
! 215: * return a kernel virtual address.
! 216: */
! 217: #define ISA_HOLE_VADDR(p) ((void *) ((u_long)(p) - IOM_BEGIN + atdevbase))
! 218:
! 219: #endif /* _I386_ISA_MACHDEP_H_ XXX */
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