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Annotation of Net2/arch/i386/stand/breadas.c, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright (c) 1989, 1990, 1991, 1992 William F. Jolitz, TeleMuse
                      3:  * All rights reserved.
                      4:  *
                      5:  * Redistribution and use in source and binary forms, with or without
                      6:  * modification, are permitted provided that the following conditions
                      7:  * are met:
                      8:  * 1. Redistributions of source code must retain the above copyright
                      9:  *    notice, this list of conditions and the following disclaimer.
                     10:  * 2. Redistributions in binary form must reproduce the above copyright
                     11:  *    notice, this list of conditions and the following disclaimer in the
                     12:  *    documentation and/or other materials provided with the distribution.
                     13:  * 3. All advertising materials mentioning features or use of this software
                     14:  *    must display the following acknowledgement:
                     15:  *     This software is a component of "386BSD" developed by 
                     16:        William F. Jolitz, TeleMuse.
                     17:  * 4. Neither the name of the developer nor the name "386BSD"
                     18:  *    may be used to endorse or promote products derived from this software
                     19:  *    without specific prior written permission.
                     20:  *
                     21:  * THIS SOFTWARE IS A COMPONENT OF 386BSD DEVELOPED BY WILLIAM F. JOLITZ 
                     22:  * AND IS INTENDED FOR RESEARCH AND EDUCATIONAL PURPOSES ONLY. THIS 
                     23:  * SOFTWARE SHOULD NOT BE CONSIDERED TO BE A COMMERCIAL PRODUCT. 
                     24:  * THE DEVELOPER URGES THAT USERS WHO REQUIRE A COMMERCIAL PRODUCT 
                     25:  * NOT MAKE USE THIS WORK.
                     26:  *
                     27:  * FOR USERS WHO WISH TO UNDERSTAND THE 386BSD SYSTEM DEVELOPED
                     28:  * BY WILLIAM F. JOLITZ, WE RECOMMEND THE USER STUDY WRITTEN 
                     29:  * REFERENCES SUCH AS THE  "PORTING UNIX TO THE 386" SERIES 
                     30:  * (BEGINNING JANUARY 1991 "DR. DOBBS JOURNAL", USA AND BEGINNING 
                     31:  * JUNE 1991 "UNIX MAGAZIN", GERMANY) BY WILLIAM F. JOLITZ AND 
                     32:  * LYNNE GREER JOLITZ, AS WELL AS OTHER BOOKS ON UNIX AND THE 
                     33:  * ON-LINE 386BSD USER MANUAL BEFORE USE. A BOOK DISCUSSING THE INTERNALS 
                     34:  * OF 386BSD ENTITLED "386BSD FROM THE INSIDE OUT" WILL BE AVAILABLE LATE 1992.
                     35:  *
                     36:  * THIS SOFTWARE IS PROVIDED BY THE DEVELOPER ``AS IS'' AND
                     37:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     38:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     39:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE DEVELOPER BE LIABLE
                     40:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     41:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     42:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     43:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     44:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     45:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     46:  * SUCH DAMAGE.
                     47:  *
                     48:  */
                     49: 
                     50: /*
                     51:  * Interface to driver to obtain a block off the disk drive.
                     52:  */
                     53: #include "param.h"
                     54: #include "saio.h"
                     55: 
                     56: 
                     57: char *devname = "as";
                     58: static ss = 1;
                     59: struct iob iobuf;
                     60: bread(bdev, off, addr, sz)
                     61:        char *addr;
                     62: {
                     63: 
                     64: /*printf("bread %d %d %x %d\n", bdev, off, addr, sz);*/
                     65:        iobuf.i_dev = 0;
                     66:        iobuf.i_adapt = 0;
                     67:        iobuf.i_ctlr = 0;
                     68:        iobuf.i_part = 0;
                     69:        iobuf.i_unit = 0;
                     70:        iobuf.i_cc = sz;
                     71:        iobuf.i_bn = off;
                     72:        iobuf.i_ma = addr;
                     73:        /*io.i_boff= 0;*/
                     74:        iobuf.i_flgs = F_FILE | F_READ;
                     75:        if(ss) { ss=0; asopen(&iobuf); }
                     76:        asstrategy(&iobuf, F_READ);
                     77:        scankbd();
                     78:        return(0);
                     79: }
                     80: 

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