isavar.h revision 1.27
1 /* $NetBSD: isavar.h,v 1.27 1997/07/15 08:40:02 leo Exp $ */ 2 3 /*- 4 * Copyright (c) 1997 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, 9 * NASA Ames Research Center. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the NetBSD 22 * Foundation, Inc. and its contributors. 23 * 4. Neither the name of The NetBSD Foundation nor the names of its 24 * contributors may be used to endorse or promote products derived 25 * from this software without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 28 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 29 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 30 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 31 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 37 * POSSIBILITY OF SUCH DAMAGE. 38 */ 39 40 /* 41 * Copyright (c) 1995 Chris G. Demetriou 42 * Copyright (c) 1992 Berkeley Software Design, Inc. 43 * All rights reserved. 44 * 45 * Redistribution and use in source and binary forms, with or without 46 * modification, are permitted provided that the following conditions 47 * are met: 48 * 1. Redistributions of source code must retain the above copyright 49 * notice, this list of conditions and the following disclaimer. 50 * 2. Redistributions in binary form must reproduce the above copyright 51 * notice, this list of conditions and the following disclaimer in the 52 * documentation and/or other materials provided with the distribution. 53 * 3. All advertising materials mentioning features or use of this software 54 * must display the following acknowledgement: 55 * This product includes software developed by Berkeley Software 56 * Design, Inc. 57 * 4. The name of Berkeley Software Design must not be used to endorse 58 * or promote products derived from this software without specific 59 * prior written permission. 60 * 61 * THIS SOFTWARE IS PROVIDED BY BERKELEY SOFTWARE DESIGN, INC. ``AS IS'' AND 62 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 63 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 64 * ARE DISCLAIMED. IN NO EVENT SHALL BERKELEY SOFTWARE DESIGN, INC. BE LIABLE 65 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 66 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 67 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 68 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 69 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 70 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 71 * SUCH DAMAGE. 72 * 73 * BSDI Id: isavar.h,v 1.5 1992/12/01 18:06:00 karels Exp 74 */ 75 76 #ifndef _DEV_ISA_ISAVAR_H_ 77 #define _DEV_ISA_ISAVAR_H_ 78 79 /* 80 * Definitions for ISA autoconfiguration. 81 */ 82 83 #include <sys/queue.h> 84 #include <machine/bus.h> 85 86 /* 87 * Structures and definitions needed by the machine-dependent header. 88 */ 89 struct isabus_attach_args; 90 91 #if (alpha + atari + i386 != 1) 92 ERROR: COMPILING FOR UNSUPPORTED MACHINE, OR MORE THAN ONE. 93 #endif 94 #if alpha 95 #include <alpha/isa/isa_machdep.h> 96 #endif 97 #if atari 98 #include <atari/isa/isa_machdep.h> 99 #endif 100 #if i386 101 #include <i386/isa/isa_machdep.h> 102 #endif 103 104 /* 105 * ISA bus attach arguments 106 */ 107 struct isabus_attach_args { 108 char *iba_busname; /* XXX should be common */ 109 bus_space_tag_t iba_iot; /* isa i/o space tag */ 110 bus_space_tag_t iba_memt; /* isa mem space tag */ 111 bus_dma_tag_t iba_dmat; /* isa DMA tag */ 112 isa_chipset_tag_t iba_ic; 113 }; 114 115 /* 116 * ISA driver attach arguments 117 */ 118 struct isa_attach_args { 119 bus_space_tag_t ia_iot; /* isa i/o space tag */ 120 bus_space_tag_t ia_memt; /* isa mem space tag */ 121 bus_dma_tag_t ia_dmat; /* DMA tag */ 122 123 isa_chipset_tag_t ia_ic; 124 125 int ia_iobase; /* base i/o address */ 126 int ia_iosize; /* span of ports used */ 127 int ia_irq; /* interrupt request */ 128 int ia_drq; /* DMA request */ 129 int ia_maddr; /* physical i/o mem addr */ 130 u_int ia_msize; /* size of i/o memory */ 131 void *ia_aux; /* driver specific */ 132 133 bus_space_handle_t ia_delaybah; /* i/o handle for `delay port' */ 134 }; 135 136 #define IOBASEUNK -1 /* i/o address is unknown */ 137 #define IRQUNK -1 /* interrupt request line is unknown */ 138 #define DRQUNK -1 /* DMA request line is unknown */ 139 #define MADDRUNK -1 /* shared memory address is unknown */ 140 141 /* 142 * Per-device ISA variables 143 */ 144 struct isadev { 145 struct device *id_dev; /* back pointer to generic */ 146 TAILQ_ENTRY(isadev) 147 id_bchain; /* bus chain */ 148 }; 149 150 /* 151 * ISA master bus 152 */ 153 struct isa_softc { 154 struct device sc_dev; /* base device */ 155 TAILQ_HEAD(, isadev) 156 sc_subdevs; /* list of all children */ 157 158 bus_space_tag_t sc_iot; /* isa io space tag */ 159 bus_space_tag_t sc_memt; /* isa mem space tag */ 160 bus_dma_tag_t sc_dmat; /* isa DMA tag */ 161 162 isa_chipset_tag_t sc_ic; 163 164 /* 165 * Bitmap representing the DRQ channels available 166 * for ISA. 167 */ 168 int sc_drqmap; 169 170 bus_space_handle_t sc_dma1h; /* i/o handle for DMA controller #1 */ 171 bus_space_handle_t sc_dma2h; /* i/o handle for DMA controller #2 */ 172 bus_space_handle_t sc_dmapgh; /* i/o handle for DMA page registers */ 173 174 /* 175 * DMA maps used for the 8 DMA channels. 176 */ 177 bus_dmamap_t sc_dmamaps[8]; 178 vm_size_t sc_dmalength[8]; 179 180 int sc_dmareads; /* state for isa_dmadone() */ 181 int sc_dmafinished; /* DMA completion state */ 182 183 /* 184 * This i/o handle is used to map port 0x84, which is 185 * read to provide a 1.25us delay. This access handle 186 * is mapped in isaattach(), and exported to drivers 187 * via isa_attach_args. 188 */ 189 bus_space_handle_t sc_delaybah; 190 }; 191 192 #define ISA_DRQ_ISFREE(isadev, drq) \ 193 ((((struct isa_softc *)(isadev))->sc_drqmap & (1 << (drq))) == 0) 194 195 #define ISA_DRQ_ALLOC(isadev, drq) \ 196 ((struct isa_softc *)(isadev))->sc_drqmap |= (1 << (drq)) 197 198 #define ISA_DRQ_FREE(isadev, drq) \ 199 ((struct isa_softc *)(isadev))->sc_drqmap &= ~(1 << (drq)) 200 201 #define cf_iobase cf_loc[0] 202 #define cf_iosize cf_loc[1] 203 #define cf_maddr cf_loc[2] 204 #define cf_msize cf_loc[3] 205 #define cf_irq cf_loc[4] 206 #define cf_drq cf_loc[5] 207 208 /* 209 * ISA interrupt handler manipulation. 210 * 211 * To establish an ISA interrupt handler, a driver calls isa_intr_establish() 212 * with the interrupt number, type, level, function, and function argument of 213 * the interrupt it wants to handle. Isa_intr_establish() returns an opaque 214 * handle to an event descriptor if it succeeds, and invokes panic() if it 215 * fails. (XXX It should return NULL, then drivers should handle that, but 216 * what should they do?) Interrupt handlers should return 0 for "interrupt 217 * not for me", 1 for "I took care of it", or -1 for "I guess it was mine, 218 * but I wasn't expecting it." 219 * 220 * To remove an interrupt handler, the driver calls isa_intr_disestablish() 221 * with the handle returned by isa_intr_establish() for that handler. 222 */ 223 224 /* ISA interrupt sharing types */ 225 char *isa_intr_typename __P((int type)); 226 227 #ifdef NEWCONFIG 228 /* 229 * Establish a device as being on the ISA bus (XXX NOT IMPLEMENTED). 230 */ 231 void isa_establish __P((struct isadev *, struct device *)); 232 #endif 233 234 /* 235 * Some ISA devices (e.g. on a VLB) can perform 32-bit DMA. This 236 * flag is passed to bus_dmamap_create() to indicate that fact. 237 */ 238 #define ISABUS_DMA_32BIT BUS_DMA_BUS1 239 240 #endif /* _DEV_ISA_ISAVAR_H_ */ 241
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