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 | |