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