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"
42 * Return a 'boothowto' value corresponding to the kernel arguments in
43 * (kargs) and any relevant environment variables.
50 {"boot_askname", RB_ASKNAME},
51 {"boot_cdrom", RB_CDROM},
53 {"boot_dfltroot", RB_DFLTROOT},
55 {"boot_multicons", RB_MULTIPLE},
56 {"boot_mute", RB_MUTE},
57 {"boot_pause", RB_PAUSE},
58 {"boot_serial", RB_SERIAL},
59 {"boot_single", RB_SINGLE},
60 {"boot_verbose", RB_VERBOSE},
65 md_getboothowto(char *kargs)
78 if (!active && (*cp == '-')) {
107 howto |= RB_DFLTROOT;
122 /* get equivalents from the environment */
123 for (i = 0; howto_names[i].ev != NULL; i++)
124 if (getenv(howto_names[i].ev) != NULL)
125 howto |= howto_names[i].mask;
126 if (!strcmp(getenv("console"), "comconsole"))
128 if (!strcmp(getenv("console"), "nullconsole"))
134 * Copy the environment into the load area starting at (addr).
135 * Each variable is formatted as <name>=<value>, with a single nul
136 * separating each variable, and a double nul terminating the environment.
139 md_copyenv(vm_offset_t addr)
143 /* traverse the environment */
144 for (ep = environ; ep != NULL; ep = ep->ev_next) {
145 archsw.arch_copyin(ep->ev_name, addr, strlen(ep->ev_name));
146 addr += strlen(ep->ev_name);
147 archsw.arch_copyin("=", addr, 1);
149 if (ep->ev_value != NULL) {
150 archsw.arch_copyin(ep->ev_value, addr, strlen(ep->ev_value));
151 addr += strlen(ep->ev_value);
153 archsw.arch_copyin("", addr, 1);
156 archsw.arch_copyin("", addr, 1);
162 * Copy module-related data into the load area, where it can be
163 * used as a directory for loaded modules.
165 * Module data is presented in a self-describing format. Each datum
166 * is preceded by a 32-bit identifier and a 32-bit size field.
168 * Currently, the following data are saved:
170 * MOD_NAME (variable) module name (string)
171 * MOD_TYPE (variable) module type (string)
172 * MOD_ARGS (variable) module parameters (string)
173 * MOD_ADDR sizeof(vm_offset_t) module load address
174 * MOD_SIZE sizeof(size_t) module size
175 * MOD_METADATA (variable) type-specific metadata
180 #define COPY32(v, a, c) { \
183 archsw.arch_copyin(&x, a, sizeof(x)); \
187 #define MOD_STR(t, a, s, c) { \
189 COPY32(strlen(s) + 1, a, c) \
191 archsw.arch_copyin(s, a, strlen(s) + 1);\
192 a += roundup(strlen(s) + 1, align); \
195 #define MOD_NAME(a, s, c) MOD_STR(MODINFO_NAME, a, s, c)
196 #define MOD_TYPE(a, s, c) MOD_STR(MODINFO_TYPE, a, s, c)
197 #define MOD_ARGS(a, s, c) MOD_STR(MODINFO_ARGS, a, s, c)
199 #define MOD_VAR(t, a, s, c) { \
201 COPY32(sizeof(s), a, c); \
203 archsw.arch_copyin(&s, a, sizeof(s)); \
204 a += roundup(sizeof(s), align); \
207 #define MOD_ADDR(a, s, c) MOD_VAR(MODINFO_ADDR, a, s, c)
208 #define MOD_SIZE(a, s, c) MOD_VAR(MODINFO_SIZE, a, s, c)
210 #define MOD_METADATA(a, mm, c) { \
211 COPY32(MODINFO_METADATA | mm->md_type, a, c);\
212 COPY32(mm->md_size, a, c); \
214 archsw.arch_copyin(mm->md_data, a, mm->md_size);\
215 a += roundup(mm->md_size, align); \
218 #define MOD_END(a, c) { \
219 COPY32(MODINFO_END, a, c); \
224 md_copymodules(vm_offset_t addr, int kern64)
226 struct preloaded_file *fp;
227 struct file_metadata *md;
232 /* start with the first module on the list, should be the kernel */
233 for (fp = file_findfile(NULL, NULL); fp != NULL; fp = fp->f_next) {
235 MOD_NAME(addr, fp->f_name, c); /* this field must come first */
236 MOD_TYPE(addr, fp->f_type, c);
238 MOD_ARGS(addr, fp->f_args, c);
240 scratch64 = fp->f_addr;
241 MOD_ADDR(addr, scratch64, c);
242 scratch64 = fp->f_size;
243 MOD_SIZE(addr, scratch64, c);
245 MOD_ADDR(addr, fp->f_addr, c);
246 MOD_SIZE(addr, fp->f_size, c);
248 for (md = fp->f_metadata; md != NULL; md = md->md_next) {
249 if (!(md->md_type & MODINFOMD_NOCOPY)) {
250 MOD_METADATA(addr, md, c);
259 * Load the information expected by a powerpc kernel.
261 * - The 'boothowto' argument is constructed
262 * - The 'bootdev' argument is constructed
263 * - The kernel environment is copied into kernel space.
264 * - Module metadata are formatted and placed in kernel space.
267 md_load_dual(char *args, vm_offset_t *modulep, int kern64)
269 struct preloaded_file *kfp;
270 struct preloaded_file *xp;
271 struct file_metadata *md;
280 align = kern64 ? 8 : 4;
281 howto = md_getboothowto(args);
284 * Allow the environment variable 'rootdev' to override the supplied device
285 * This should perhaps go to MI code and/or have $rootdev tested/set by
286 * MI code before launching the kernel.
288 rootdevname = getenv("rootdev");
289 if (rootdevname == NULL)
290 rootdevname = getenv("currdev");
291 /* Try reading the /etc/fstab file to select the root device */
292 getrootmount(rootdevname);
294 /* find the last module in the chain */
296 for (xp = file_findfile(NULL, NULL); xp != NULL; xp = xp->f_next) {
297 if (addr < (xp->f_addr + xp->f_size))
298 addr = xp->f_addr + xp->f_size;
300 /* pad to a page boundary */
301 addr = roundup(addr, PAGE_SIZE);
303 /* copy our environment */
305 addr = md_copyenv(addr);
307 /* pad to a page boundary */
308 addr = roundup(addr, PAGE_SIZE);
311 kfp = file_findfile(NULL, kern64 ? "elf64 kernel" : "elf32 kernel");
313 kfp = file_findfile(NULL, "elf kernel");
315 panic("can't find kernel file");
316 file_addmetadata(kfp, MODINFOMD_HOWTO, sizeof howto, &howto);
319 file_addmetadata(kfp, MODINFOMD_ENVP, sizeof scratch64, &scratch64);
321 file_addmetadata(kfp, MODINFOMD_KERNEND, sizeof scratch64, &scratch64);
323 file_addmetadata(kfp, MODINFOMD_ENVP, sizeof envp, &envp);
324 file_addmetadata(kfp, MODINFOMD_KERNEND, sizeof kernend, &kernend);
328 size = md_copymodules(0, kern64);
329 kernend = roundup(addr + size, PAGE_SIZE);
331 md = file_findmetadata(kfp, MODINFOMD_KERNEND);
334 bcopy(&scratch64, md->md_data, sizeof scratch64);
336 bcopy(&kernend, md->md_data, sizeof kernend);
339 (void)md_copymodules(addr, kern64);
345 md_load(char *args, vm_offset_t *modulep)
347 return (md_load_dual(args, modulep, 0));
351 md_load64(char *args, vm_offset_t *modulep)
353 return (md_load_dual(args, modulep, 1));