2 * Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
31 #include <sys/param.h>
32 #include <sys/reboot.h>
33 #include <sys/linker.h>
34 #include <machine/bootinfo.h>
35 #include <machine/metadata.h>
36 #include "bootstrap.h"
41 #ifdef LOADER_GELI_SUPPORT
45 static struct bootinfo *bi;
48 * Load the information expected by an i386 kernel.
50 * - The 'boothowto' argument is constructed
51 * - The 'bootdev' argument is constructed
52 * - The 'bootinfo' struct is constructed, and copied into the kernel space.
53 * - The kernel environment is copied into kernel space.
54 * - Module metadata are formatted and placed in kernel space.
57 bi_load32(char *args, int *howtop, int *bootdevp, vm_offset_t *bip, vm_offset_t *modulep, vm_offset_t *kernendp)
59 struct preloaded_file *xp, *kfp;
60 struct i386_devdesc *rootdev;
61 struct file_metadata *md;
66 vm_offset_t ssym, esym;
68 int bootdevnr, i, howto;
70 const char *kernelpath;
72 howto = bi_getboothowto(args);
75 * Allow the environment variable 'rootdev' to override the supplied device
76 * This should perhaps go to MI code and/or have $rootdev tested/set by
77 * MI code before launching the kernel.
79 rootdevname = getenv("rootdev");
80 i386_getdev((void **)(&rootdev), rootdevname, NULL);
81 if (rootdev == NULL) { /* bad $rootdev/$currdev */
82 printf("can't determine root device\n");
86 /* Try reading the /etc/fstab file to select the root device */
87 getrootmount(devformat(&rootdev->dd));
89 /* Do legacy rootdev guessing */
91 /* XXX - use a default bootdev of 0. Is this ok??? */
94 bi = calloc(sizeof(*bi), 1);
95 switch(rootdev->dd.d_dev->dv_type) {
98 /* pass in the BIOS device number of the current disk */
99 bi->bi_bios_dev = bd_unit2bios(rootdev);
100 bootdevnr = bd_getdev(rootdev);
108 printf("WARNING - don't know how to boot from device type %d\n",
109 rootdev->dd.d_dev->dv_type);
111 if (bootdevnr == -1) {
112 printf("root device %s invalid\n", devformat(&rootdev->dd));
117 /* find the last module in the chain */
119 for (xp = file_findfile(NULL, NULL); xp != NULL; xp = xp->f_next) {
120 if (addr < (xp->f_addr + xp->f_size))
121 addr = xp->f_addr + xp->f_size;
123 /* pad to a page boundary */
124 addr = roundup(addr, PAGE_SIZE);
126 addr = build_font_module(addr);
128 /* copy our environment */
130 addr = md_copyenv(addr);
132 /* pad to a page boundary */
133 addr = roundup(addr, PAGE_SIZE);
135 kfp = file_findfile(NULL, "elf kernel");
137 kfp = file_findfile(NULL, "elf32 kernel");
139 panic("can't find kernel file");
140 kernend = 0; /* fill it in later */
141 file_addmetadata(kfp, MODINFOMD_HOWTO, sizeof howto, &howto);
142 file_addmetadata(kfp, MODINFOMD_ENVP, sizeof envp, &envp);
143 file_addmetadata(kfp, MODINFOMD_KERNEND, sizeof kernend, &kernend);
144 bios_addsmapdata(kfp);
145 #ifdef LOADER_GELI_SUPPORT
146 geli_export_key_metadata(kfp);
148 bi_load_vbe_data(kfp);
150 /* Figure out the size and location of the metadata */
152 size = md_copymodules(0, false);
153 kernend = roundup(addr + size, PAGE_SIZE);
156 /* patch MODINFOMD_KERNEND */
157 md = file_findmetadata(kfp, MODINFOMD_KERNEND);
158 bcopy(&kernend, md->md_data, sizeof kernend);
160 /* copy module list and metadata */
161 (void)md_copymodules(addr, false);
164 md = file_findmetadata(kfp, MODINFOMD_SSYM);
166 ssym = *((vm_offset_t *)&(md->md_data));
167 md = file_findmetadata(kfp, MODINFOMD_ESYM);
169 esym = *((vm_offset_t *)&(md->md_data));
170 if (ssym == 0 || esym == 0)
171 ssym = esym = 0; /* sanity */
173 /* legacy bootinfo structure */
174 kernelname = getenv("kernelname");
175 i386_getdev(NULL, kernelname, &kernelpath);
176 bi->bi_version = BOOTINFO_VERSION;
177 bi->bi_size = sizeof(*bi);
178 bi->bi_memsizes_valid = 1;
179 bi->bi_basemem = bios_basemem / 1024;
180 bi->bi_extmem = bios_extmem / 1024;
182 bi->bi_modulep = *modulep;
183 bi->bi_kernend = kernend;
184 bi->bi_kernelname = VTOP(kernelpath);
185 bi->bi_symtab = ssym; /* XXX this is only the primary kernel symtab */
186 bi->bi_esymtab = esym;
188 /* legacy boot arguments */
189 *howtop = howto | RB_BOOTINFO;
190 *bootdevp = bootdevnr;