1 /*- 2 * Copyright (c) 1992 Berkeley Software Design, Inc. All rights reserved. 3 * The Berkeley Software Design Inc. software License Agreement specifies 4 * the terms and conditions for redistribution. 5 * 6 * BSDI $Id: isavar.h,v 1.5 1993/10/26 12:16:35 mycroft Exp $ 7 */ 8 9 /* 10 * ISA driver attach arguments 11 */ 12 struct isa_attach_args { 13 u_short ia_iobase; /* base i/o address */ 14 u_short ia_iosize; /* span of ports used */ 15 u_short ia_irq; /* interrupt request */ 16 u_short ia_drq; /* DMA request */ 17 caddr_t ia_maddr; /* physical i/o mem addr */ 18 u_int ia_msize; /* size of i/o memory */ 19 void *ia_aux; /* driver specific */ 20 }; 21 22 #define IOBASEUNK 0xffff /* i/o address is unknown */ 23 #define DRQUNK 0xffff /* DMA request line is unknown */ 24 #define MADDRUNK (caddr_t)-1 /* shared memory address is unknown */ 25 26 /* 27 * per-device ISA variables 28 */ 29 struct isadev { 30 struct device *id_dev; /* back pointer to generic */ 31 struct isadev *id_bchain; /* forward link in bus chain */ 32 }; 33 34 /* 35 * ISA masterbus 36 */ 37 struct isa_softc { 38 struct device sc_dev; /* base device */ 39 struct isadev *sc_isadev; /* list of all children */ 40 }; 41 42 #define cf_iobase cf_loc[0] 43 #define cf_iosize cf_loc[1] 44 #define cf_maddr cf_loc[2] 45 #define cf_msize cf_loc[3] 46 #define cf_irq cf_loc[4] 47 #define cf_drq cf_loc[5] 48 49 /* 50 * Interrupt handler chains. Interrupt handlers should return 0 for 51 * `not I', 1 (`I took care of it'), or -1 (`I guess it was mine, but 52 * I wasn't expecting it'). intr_establish() inserts a handler into 53 * the list. The handler is called with its (single) argument. 54 */ 55 struct intrhand { 56 int (*ih_fun)(); 57 void *ih_arg; 58 u_long ih_count; 59 struct intrhand *ih_next; 60 } *intrhand[16]; 61 62 void intr_establish __P((int intr, struct intrhand *, enum devclass)); 63 void isa_establish __P((struct isadev *, struct device *)); 64 65 /* 66 * software conventions 67 */ 68 typedef enum { BUS_ISA, BUS_EISA, BUS_MCA } isa_type; 69 70 extern int atdevbase; /* kernel virtual address of "hole" */ 71 extern isa_type isa_bustype; /* type of bus */ 72 73 /* 74 * Given a kernel virtual address for some location 75 * in the "hole" I/O space, return a physical address. 76 */ 77 #define ISA_PHYSADDR(v) ((caddr_t) ((u_long)(v) - atdevbase + IOM_BEGIN)) 78 /* 79 * Given a physical address in the "hole", 80 * return a kernel virtual address. 81 */ 82 #define ISA_HOLE_VADDR(p) ((caddr_t) ((u_long)(p) - IOM_BEGIN + atdevbase)) 83