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
26 * from: FreeBSD: src/sys/boot/sparc64/loader/metadata.c,v 1.6
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
33 #include <sys/param.h>
34 #include <sys/reboot.h>
35 #include <sys/linker.h>
37 #include <machine/metadata.h>
39 #include "bootstrap.h"
43 * Return a 'boothowto' value corresponding to the kernel arguments in
44 * (kargs) and any relevant environment variables.
51 {"boot_askname", RB_ASKNAME},
52 {"boot_cdrom", RB_CDROM},
54 {"boot_dfltroot", RB_DFLTROOT},
56 {"boot_multicons", RB_MULTIPLE},
57 {"boot_mute", RB_MUTE},
58 {"boot_pause", RB_PAUSE},
59 {"boot_serial", RB_SERIAL},
60 {"boot_single", RB_SINGLE},
61 {"boot_verbose", RB_VERBOSE},
66 md_getboothowto(char *kargs)
79 if (!active && (*cp == '-')) {
108 howto |= RB_DFLTROOT;
123 /* get equivalents from the environment */
124 for (i = 0; howto_names[i].ev != NULL; i++)
125 if (getenv(howto_names[i].ev) != NULL)
126 howto |= howto_names[i].mask;
127 if (!strcmp(getenv("console"), "comconsole"))
129 if (!strcmp(getenv("console"), "nullconsole"))
135 * Copy the environment into the load area starting at (addr).
136 * Each variable is formatted as <name>=<value>, with a single nul
137 * separating each variable, and a double nul terminating the environment.
140 md_copyenv(vm_offset_t addr)
144 /* traverse the environment */
145 for (ep = environ; ep != NULL; ep = ep->ev_next) {
146 archsw.arch_copyin(ep->ev_name, addr, strlen(ep->ev_name));
147 addr += strlen(ep->ev_name);
148 archsw.arch_copyin("=", addr, 1);
150 if (ep->ev_value != NULL) {
151 archsw.arch_copyin(ep->ev_value, addr, strlen(ep->ev_value));
152 addr += strlen(ep->ev_value);
154 archsw.arch_copyin("", addr, 1);
157 archsw.arch_copyin("", addr, 1);
163 * Copy module-related data into the load area, where it can be
164 * used as a directory for loaded modules.
166 * Module data is presented in a self-describing format. Each datum
167 * is preceded by a 32-bit identifier and a 32-bit size field.
169 * Currently, the following data are saved:
171 * MOD_NAME (variable) module name (string)
172 * MOD_TYPE (variable) module type (string)
173 * MOD_ARGS (variable) module parameters (string)
174 * MOD_ADDR sizeof(vm_offset_t) module load address
175 * MOD_SIZE sizeof(size_t) module size
176 * MOD_METADATA (variable) type-specific metadata
178 #define COPY32(v, a, c) { \
181 archsw.arch_copyin(&x, a, sizeof(x)); \
185 #define MOD_STR(t, a, s, c) { \
187 COPY32(strlen(s) + 1, a, c) \
189 archsw.arch_copyin(s, a, strlen(s) + 1);\
190 a += roundup(strlen(s) + 1, sizeof(u_long));\
193 #define MOD_NAME(a, s, c) MOD_STR(MODINFO_NAME, a, s, c)
194 #define MOD_TYPE(a, s, c) MOD_STR(MODINFO_TYPE, a, s, c)
195 #define MOD_ARGS(a, s, c) MOD_STR(MODINFO_ARGS, a, s, c)
197 #define MOD_VAR(t, a, s, c) { \
199 COPY32(sizeof(s), a, c); \
201 archsw.arch_copyin(&s, a, sizeof(s)); \
202 a += roundup(sizeof(s), sizeof(u_long)); \
205 #define MOD_ADDR(a, s, c) MOD_VAR(MODINFO_ADDR, a, s, c)
206 #define MOD_SIZE(a, s, c) MOD_VAR(MODINFO_SIZE, a, s, c)
208 #define MOD_METADATA(a, mm, c) { \
209 COPY32(MODINFO_METADATA | mm->md_type, a, c);\
210 COPY32(mm->md_size, a, c); \
212 archsw.arch_copyin(mm->md_data, a, mm->md_size);\
213 a += roundup(mm->md_size, sizeof(u_long)); \
216 #define MOD_END(a, c) { \
217 COPY32(MODINFO_END, a, c); \
222 md_copymodules(vm_offset_t addr)
224 struct preloaded_file *fp;
225 struct file_metadata *md;
229 /* start with the first module on the list, should be the kernel */
230 for (fp = file_findfile(NULL, NULL); fp != NULL; fp = fp->f_next) {
232 MOD_NAME(addr, fp->f_name, c); /* this field must come first */
233 MOD_TYPE(addr, fp->f_type, c);
235 MOD_ARGS(addr, fp->f_args, c);
236 MOD_ADDR(addr, fp->f_addr, c);
237 MOD_SIZE(addr, fp->f_size, c);
238 for (md = fp->f_metadata; md != NULL; md = md->md_next) {
239 if (!(md->md_type & MODINFOMD_NOCOPY)) {
240 MOD_METADATA(addr, md, c);
249 * Load the information expected by a powerpc kernel.
251 * - The 'boothowto' argument is constructed
252 * - The 'bootdev' argument is constructed
253 * - The kernel environment is copied into kernel space.
254 * - Module metadata are formatted and placed in kernel space.
257 md_load(char *args, vm_offset_t *modulep)
259 struct preloaded_file *kfp;
260 struct preloaded_file *xp;
261 struct file_metadata *md;
271 howto = md_getboothowto(args);
274 * Allow the environment variable 'rootdev' to override the supplied device
275 * This should perhaps go to MI code and/or have $rootdev tested/set by
276 * MI code before launching the kernel.
278 rootdevname = getenv("rootdev");
279 if (rootdevname == NULL)
280 rootdevname = getenv("currdev");
281 /* Try reading the /etc/fstab file to select the root device */
282 getrootmount(rootdevname);
284 /* find the last module in the chain */
286 for (xp = file_findfile(NULL, NULL); xp != NULL; xp = xp->f_next) {
287 if (addr < (xp->f_addr + xp->f_size))
288 addr = xp->f_addr + xp->f_size;
290 /* pad to a page boundary */
291 addr = roundup(addr, PAGE_SIZE);
293 /* copy our environment */
295 addr = md_copyenv(addr);
297 /* pad to a page boundary */
298 addr = roundup(addr, PAGE_SIZE);
301 kfp = file_findfile(NULL, "elf32 kernel");
303 kfp = file_findfile(NULL, "elf kernel");
305 panic("can't find kernel file");
306 file_addmetadata(kfp, MODINFOMD_HOWTO, sizeof howto, &howto);
307 file_addmetadata(kfp, MODINFOMD_ENVP, sizeof envp, &envp);
308 file_addmetadata(kfp, MODINFOMD_KERNEND, sizeof kernend, &kernend);
311 size = md_copymodules(0);
312 kernend = roundup(addr + size, PAGE_SIZE);
314 md = file_findmetadata(kfp, MODINFOMD_KERNEND);
315 bcopy(&kernend, md->md_data, sizeof kernend);
317 (void)md_copymodules(addr);