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"
40 #ifdef LOADER_GELI_SUPPORT
43 static const size_t keybuf_size = sizeof(struct keybuf) +
44 (GELI_MAX_KEYS * sizeof(struct keybuf_ent));
47 static struct bootinfo bi;
50 * Copy module-related data into the load area, where it can be
51 * used as a directory for loaded modules.
53 * Module data is presented in a self-describing format. Each datum
54 * is preceded by a 32-bit identifier and a 32-bit size field.
56 * Currently, the following data are saved:
58 * MOD_NAME (variable) module name (string)
59 * MOD_TYPE (variable) module type (string)
60 * MOD_ARGS (variable) module parameters (string)
61 * MOD_ADDR sizeof(vm_offset_t) module load address
62 * MOD_SIZE sizeof(size_t) module size
63 * MOD_METADATA (variable) type-specific metadata
65 #define COPY32(v, a, c) { \
68 i386_copyin(&x, a, sizeof(x)); \
72 #define MOD_STR(t, a, s, c) { \
74 COPY32(strlen(s) + 1, a, c); \
76 i386_copyin(s, a, strlen(s) + 1); \
77 a += roundup(strlen(s) + 1, sizeof(u_long));\
80 #define MOD_NAME(a, s, c) MOD_STR(MODINFO_NAME, a, s, c)
81 #define MOD_TYPE(a, s, c) MOD_STR(MODINFO_TYPE, a, s, c)
82 #define MOD_ARGS(a, s, c) MOD_STR(MODINFO_ARGS, a, s, c)
84 #define MOD_VAR(t, a, s, c) { \
86 COPY32(sizeof(s), a, c); \
88 i386_copyin(&s, a, sizeof(s)); \
89 a += roundup(sizeof(s), sizeof(u_long)); \
92 #define MOD_ADDR(a, s, c) MOD_VAR(MODINFO_ADDR, a, s, c)
93 #define MOD_SIZE(a, s, c) MOD_VAR(MODINFO_SIZE, a, s, c)
95 #define MOD_METADATA(a, mm, c) { \
96 COPY32(MODINFO_METADATA | mm->md_type, a, c); \
97 COPY32(mm->md_size, a, c); \
99 i386_copyin(mm->md_data, a, mm->md_size); \
100 a += roundup(mm->md_size, sizeof(u_long));\
103 #define MOD_END(a, c) { \
104 COPY32(MODINFO_END, a, c); \
109 bi_copymodules32(vm_offset_t addr)
111 struct preloaded_file *fp;
112 struct file_metadata *md;
116 /* start with the first module on the list, should be the kernel */
117 for (fp = file_findfile(NULL, NULL); fp != NULL; fp = fp->f_next) {
119 MOD_NAME(addr, fp->f_name, c); /* this field must come first */
120 MOD_TYPE(addr, fp->f_type, c);
122 MOD_ARGS(addr, fp->f_args, c);
123 MOD_ADDR(addr, fp->f_addr, c);
124 MOD_SIZE(addr, fp->f_size, c);
125 for (md = fp->f_metadata; md != NULL; md = md->md_next)
126 if (!(md->md_type & MODINFOMD_NOCOPY))
127 MOD_METADATA(addr, md, c);
134 * Load the information expected by an i386 kernel.
136 * - The 'boothowto' argument is constructed
137 * - The 'bootdev' argument is constructed
138 * - The 'bootinfo' struct is constructed, and copied into the kernel space.
139 * - The kernel environment is copied into kernel space.
140 * - Module metadata are formatted and placed in kernel space.
143 bi_load32(char *args, int *howtop, int *bootdevp, vm_offset_t *bip, vm_offset_t *modulep, vm_offset_t *kernendp)
145 struct preloaded_file *xp, *kfp;
146 struct i386_devdesc *rootdev;
147 struct file_metadata *md;
152 vm_offset_t ssym, esym;
154 int bootdevnr, i, howto;
156 const char *kernelpath;
157 #ifdef LOADER_GELI_SUPPORT
158 char buf[keybuf_size];
159 struct keybuf *keybuf = (struct keybuf *)buf;
162 howto = bi_getboothowto(args);
165 * Allow the environment variable 'rootdev' to override the supplied device
166 * This should perhaps go to MI code and/or have $rootdev tested/set by
167 * MI code before launching the kernel.
169 rootdevname = getenv("rootdev");
170 i386_getdev((void **)(&rootdev), rootdevname, NULL);
171 if (rootdev == NULL) { /* bad $rootdev/$currdev */
172 printf("can't determine root device\n");
176 /* Try reading the /etc/fstab file to select the root device */
177 getrootmount(i386_fmtdev((void *)rootdev));
179 /* Do legacy rootdev guessing */
181 /* XXX - use a default bootdev of 0. Is this ok??? */
184 switch(rootdev->dd.d_dev->dv_type) {
186 /* Pass in BIOS device number. */
187 bi.bi_bios_dev = bc_unit2bios(rootdev->dd.d_unit);
188 bootdevnr = bc_getdev(rootdev);
192 /* pass in the BIOS device number of the current disk */
193 bi.bi_bios_dev = bd_unit2bios(rootdev->dd.d_unit);
194 bootdevnr = bd_getdev(rootdev);
202 printf("WARNING - don't know how to boot from device type %d\n",
203 rootdev->dd.d_dev->dv_type);
205 if (bootdevnr == -1) {
206 printf("root device %s invalid\n", i386_fmtdev(rootdev));
211 /* find the last module in the chain */
213 for (xp = file_findfile(NULL, NULL); xp != NULL; xp = xp->f_next) {
214 if (addr < (xp->f_addr + xp->f_size))
215 addr = xp->f_addr + xp->f_size;
217 /* pad to a page boundary */
218 addr = roundup(addr, PAGE_SIZE);
220 /* copy our environment */
222 addr = bi_copyenv(addr);
224 /* pad to a page boundary */
225 addr = roundup(addr, PAGE_SIZE);
227 kfp = file_findfile(NULL, "elf kernel");
229 kfp = file_findfile(NULL, "elf32 kernel");
231 panic("can't find kernel file");
232 kernend = 0; /* fill it in later */
233 file_addmetadata(kfp, MODINFOMD_HOWTO, sizeof howto, &howto);
234 file_addmetadata(kfp, MODINFOMD_ENVP, sizeof envp, &envp);
235 file_addmetadata(kfp, MODINFOMD_KERNEND, sizeof kernend, &kernend);
236 bios_addsmapdata(kfp);
237 #ifdef LOADER_GELI_SUPPORT
238 geli_fill_keybuf(keybuf);
239 file_addmetadata(kfp, MODINFOMD_KEYBUF, keybuf_size, buf);
240 bzero(buf, sizeof(buf));
243 /* Figure out the size and location of the metadata */
245 size = bi_copymodules32(0);
246 kernend = roundup(addr + size, PAGE_SIZE);
249 /* patch MODINFOMD_KERNEND */
250 md = file_findmetadata(kfp, MODINFOMD_KERNEND);
251 bcopy(&kernend, md->md_data, sizeof kernend);
253 /* copy module list and metadata */
254 (void)bi_copymodules32(addr);
257 md = file_findmetadata(kfp, MODINFOMD_SSYM);
259 ssym = *((vm_offset_t *)&(md->md_data));
260 md = file_findmetadata(kfp, MODINFOMD_ESYM);
262 esym = *((vm_offset_t *)&(md->md_data));
263 if (ssym == 0 || esym == 0)
264 ssym = esym = 0; /* sanity */
266 /* legacy bootinfo structure */
267 kernelname = getenv("kernelname");
268 i386_getdev(NULL, kernelname, &kernelpath);
269 bi.bi_version = BOOTINFO_VERSION;
270 bi.bi_kernelname = 0; /* XXX char * -> kernel name */
271 bi.bi_nfs_diskless = 0; /* struct nfs_diskless * */
272 bi.bi_n_bios_used = 0; /* XXX would have to hook biosdisk driver for these */
273 for (i = 0; i < N_BIOS_GEOM; i++)
274 bi.bi_bios_geom[i] = bd_getbigeom(i);
275 bi.bi_size = sizeof(bi);
276 bi.bi_memsizes_valid = 1;
277 bi.bi_basemem = bios_basemem / 1024;
278 bi.bi_extmem = bios_extmem / 1024;
280 bi.bi_modulep = *modulep;
281 bi.bi_kernend = kernend;
282 bi.bi_kernelname = VTOP(kernelpath);
283 bi.bi_symtab = ssym; /* XXX this is only the primary kernel symtab */
284 bi.bi_esymtab = esym;
286 /* legacy boot arguments */
287 *howtop = howto | RB_BOOTINFO;
288 *bootdevp = bootdevnr;