1 /*- 2 * Copyright (c) 1990 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * William Jolitz. 7 * 8 * %sccs.include.redist.c% 9 * 10 * @(#)confxx.c 7.2 (Berkeley) 04/28/91 11 */ 12 13 #include "param.h" 14 #include "saio.h" 15 16 devread(io) 17 register struct iob *io; 18 { 19 int cc; 20 21 io->i_flgs |= F_RDDATA; 22 io->i_error = 0; 23 cc = (*devsw[0].dv_strategy)(io, READ); 24 io->i_flgs &= ~F_TYPEMASK; 25 return (cc); 26 } 27 28 devwrite(io) 29 register struct iob *io; 30 { 31 int cc; 32 33 io->i_flgs |= F_WRDATA; 34 io->i_error = 0; 35 cc = (*devsw[0].dv_strategy)(io, WRITE); 36 io->i_flgs &= ~F_TYPEMASK; 37 return (cc); 38 } 39 40 devopen(io) 41 register struct iob *io; 42 { 43 44 (*devsw[0].dv_open)(io); 45 } 46 47 devclose(io) 48 register struct iob *io; 49 { 50 51 (*devsw[0].dv_close)(io); 52 } 53 54 devioctl(io, cmd, arg) 55 register struct iob *io; 56 int cmd; 57 caddr_t arg; 58 { 59 60 return ((*devsw[0].dv_ioctl)(io, cmd, arg)); 61 } 62 63 /*ARGSUSED*/ 64 nullsys(io) 65 struct iob *io; 66 { 67 68 ; 69 } 70 71 /*ARGSUSED*/ 72 nullioctl(io, cmd, arg) 73 struct iob *io; 74 int cmd; 75 caddr_t arg; 76 { 77 78 return (ECMD); 79 } 80 81 int nullsys(), nullioctl(); 82 int xxstrategy(), xxopen()/*, xxioctl()*/; 83 84 struct devsw devsw[] = { 85 { "XX", xxstrategy, xxopen, nullsys, /*xxioctl*/ } 86 }; 87 int ndevs = 1 ; 88