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Annotation of sys/dev/rd.c, Revision 1.1

1.1     ! nbrk        1: /*     $OpenBSD: rd.c,v 1.1 2001/05/11 07:04:47 deraadt Exp $  */
        !             2:
        !             3: /*
        !             4:  * Copyright (c) 1995 Gordon W. Ross
        !             5:  * All rights reserved.
        !             6:  *
        !             7:  * Redistribution and use in source and binary forms, with or without
        !             8:  * modification, are permitted provided that the following conditions
        !             9:  * are met:
        !            10:  * 1. Redistributions of source code must retain the above copyright
        !            11:  *    notice, this list of conditions and the following disclaimer.
        !            12:  * 2. Redistributions in binary form must reproduce the above copyright
        !            13:  *    notice, this list of conditions and the following disclaimer in the
        !            14:  *    documentation and/or other materials provided with the distribution.
        !            15:  * 3. The name of the author may not be used to endorse or promote products
        !            16:  *    derived from this software without specific prior written permission.
        !            17:  *
        !            18:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
        !            19:  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
        !            20:  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
        !            21:  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
        !            22:  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
        !            23:  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
        !            24:  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
        !            25:  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
        !            26:  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
        !            27:  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
        !            28:  */
        !            29:
        !            30: #include <sys/param.h>
        !            31: #include <sys/systm.h>
        !            32: #include <sys/reboot.h>
        !            33:
        !            34: #include <dev/ramdisk.h>
        !            35:
        !            36: extern int boothowto;
        !            37:
        !            38: #ifndef MINIROOTSIZE
        !            39: #define MINIROOTSIZE 512
        !            40: #endif
        !            41:
        !            42: #define ROOTBYTES (MINIROOTSIZE << DEV_BSHIFT)
        !            43:
        !            44: /*
        !            45:  * This array will be patched to contain a file-system image.
        !            46:  * See the program:  src/distrib/common/rdsetroot.c
        !            47:  */
        !            48: u_int32_t rd_root_size = ROOTBYTES;
        !            49: char rd_root_image[ROOTBYTES] = "|This is the root ramdisk!\n";
        !            50:
        !            51: /*
        !            52:  * This is called during autoconfig.
        !            53:  */
        !            54: void
        !            55: rd_attach_hook(unit, rd)
        !            56:        int unit;
        !            57:        struct rd_conf *rd;
        !            58: {
        !            59:        if (unit == 0) {
        !            60:                /* Setup root ramdisk */
        !            61:                rd->rd_addr = (caddr_t) rd_root_image;
        !            62:                rd->rd_size = (size_t)  rd_root_size;
        !            63:                rd->rd_type = RD_KMEM_FIXED;
        !            64:                printf("rd%d: fixed, %d blocks\n", unit, MINIROOTSIZE);
        !            65:        }
        !            66: }
        !            67:
        !            68: /*
        !            69:  * This is called during open (i.e. mountroot)
        !            70:  */
        !            71: void
        !            72: rd_open_hook(unit, rd)
        !            73:        int unit;
        !            74:        struct rd_conf *rd;
        !            75: {
        !            76: }