1 /* $NetBSD: md_root.c,v 1.1 2000/10/02 15:22:32 tsutsui Exp $ */ 2 3 /*- 4 * Copyright (c) 1996 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Gordon W. Ross. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #include <sys/param.h> 40 #include <sys/systm.h> 41 #include <sys/reboot.h> 42 43 #include <dev/md.h> 44 45 #include "opt_mdsize.h" 46 47 extern int boothowto; 48 49 #ifndef MINIROOTSIZE 50 #define MINIROOTSIZE 512 51 #endif 52 53 #define ROOTBYTES (MINIROOTSIZE << DEV_BSHIFT) 54 55 /* 56 * This array will be patched to contain a file-system image. 57 * See the program mdsetimage(8) for details. 58 */ 59 u_int32_t md_root_size = ROOTBYTES; 60 char md_root_image[ROOTBYTES] = "|This is the root ramdisk!\n"; 61 62 /* 63 * This is called during pseudo-device attachment. 64 */ 65 void 66 md_attach_hook(unit, md) 67 int unit; 68 struct md_conf *md; 69 { 70 char pbuf[9]; 71 72 if (unit == 0) { 73 /* Setup root ramdisk */ 74 md->md_addr = (caddr_t)md_root_image; 75 md->md_size = (size_t)md_root_size; 76 md->md_type = MD_KMEM_FIXED; 77 format_bytes(pbuf, sizeof(pbuf), ROOTBYTES); 78 printf("md%d: internal %s image area\n", unit, pbuf); 79 } 80 } 81 82 /* 83 * This is called during open (i.e. mountroot) 84 */ 85 void 86 md_open_hook(unit, md) 87 int unit; 88 struct md_conf *md; 89 { 90 91 if (unit == 0) { 92 /* The root ramdisk only works single-user. */ 93 boothowto |= RB_SINGLE; 94 } 95 } 96