| 1 | /* $NetBSD: md_root.c,v 1.19 2015/08/30 05:24:03 uebayasi 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 | * |
| 19 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
| 20 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
| 21 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 22 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
| 23 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 24 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 25 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 26 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 27 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 28 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 29 | * POSSIBILITY OF SUCH DAMAGE. |
| 30 | */ |
| 31 | |
| 32 | #include <sys/cdefs.h> |
| 33 | __KERNEL_RCSID(0, "$NetBSD: md_root.c,v 1.19 2015/08/30 05:24:03 uebayasi Exp $" ); |
| 34 | |
| 35 | #include "opt_md.h" |
| 36 | #include "opt_memory_disk_image.h" |
| 37 | |
| 38 | #include <sys/param.h> |
| 39 | #include <sys/systm.h> |
| 40 | #include <sys/reboot.h> |
| 41 | |
| 42 | #include <dev/md.h> |
| 43 | |
| 44 | #ifdef MEMORY_DISK_DYNAMIC |
| 45 | #ifdef makeoptions_MEMORY_DISK_IMAGE |
| 46 | #error MEMORY_DISK_DYNAMIC is not compatible with MEMORY_DISK_IMAGE |
| 47 | #endif |
| 48 | size_t md_root_size; |
| 49 | char *md_root_image; |
| 50 | #else /* MEMORY_DISK_DYNAMIC */ |
| 51 | |
| 52 | #ifdef makeoptions_MEMORY_DISK_IMAGE |
| 53 | #ifdef MEMORY_DISK_ROOT_SIZE |
| 54 | #error MEMORY_DISK_ROOT_SIZE is not compatible with MEMORY_DISK_IMAGE |
| 55 | #endif |
| 56 | char md_root_image[] = { |
| 57 | #include "md_root_image.h" |
| 58 | }; |
| 59 | uint32_t md_root_size = sizeof(md_root_image) & ~(DEV_BSIZE - 1); |
| 60 | |
| 61 | #else /* makeoptions_MEMORY_DISK_IMAGE */ |
| 62 | |
| 63 | #ifndef MEMORY_DISK_ROOT_SIZE |
| 64 | #define MEMORY_DISK_ROOT_SIZE 512 |
| 65 | #endif |
| 66 | #define ROOTBYTES (MEMORY_DISK_ROOT_SIZE << DEV_BSHIFT) |
| 67 | |
| 68 | /* |
| 69 | * This array will be patched to contain a file-system image. |
| 70 | * See the program mdsetimage(8) for details. |
| 71 | */ |
| 72 | uint32_t md_root_size = ROOTBYTES; |
| 73 | char md_root_image[ROOTBYTES] = "|This is the root ramdisk!\n" ; |
| 74 | #endif /* makeoptions_MEMORY_DISK_IMAGE */ |
| 75 | #endif /* MEMORY_DISK_DYNAMIC */ |
| 76 | |
| 77 | #ifndef MEMORY_DISK_RBFLAGS |
| 78 | #define MEMORY_DISK_RBFLAGS RB_AUTOBOOT /* default boot mode */ |
| 79 | #endif |
| 80 | |
| 81 | #ifdef MEMORY_DISK_DYNAMIC |
| 82 | void |
| 83 | md_root_setconf(char *addr, size_t size) |
| 84 | { |
| 85 | |
| 86 | md_is_root = 1; |
| 87 | md_root_image = addr; |
| 88 | md_root_size = size; |
| 89 | } |
| 90 | #endif /* MEMORY_DISK_DYNAMIC */ |
| 91 | |
| 92 | /* |
| 93 | * This is called during pseudo-device attachment. |
| 94 | */ |
| 95 | #define PBUFLEN sizeof("99999 KB") |
| 96 | |
| 97 | void |
| 98 | md_attach_hook(int unit, struct md_conf *md) |
| 99 | { |
| 100 | char pbuf[PBUFLEN]; |
| 101 | |
| 102 | if (unit == 0 && md_is_root) { |
| 103 | /* Setup root ramdisk */ |
| 104 | md->md_addr = (void *)md_root_image; |
| 105 | md->md_size = (size_t)md_root_size; |
| 106 | md->md_type = MD_KMEM_FIXED; |
| 107 | format_bytes(pbuf, sizeof(pbuf), md->md_size); |
| 108 | aprint_verbose("md%d: internal %s image area\n" , unit, pbuf); |
| 109 | } |
| 110 | } |
| 111 | |
| 112 | /* |
| 113 | * This is called during open (i.e. mountroot) |
| 114 | */ |
| 115 | void |
| 116 | md_open_hook(int unit, struct md_conf *md) |
| 117 | { |
| 118 | |
| 119 | if (unit == 0 && md_is_root) { |
| 120 | boothowto |= MEMORY_DISK_RBFLAGS; |
| 121 | } |
| 122 | } |
| 123 | |