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>
38 #include <machine/metadata.h>
40 #include "bootstrap.h"
44 md_getboothowto(char *kargs)
57 if (!active && (*cp == '-')) {
101 /* get equivalents from the environment */
102 for (i = 0; howto_names[i].ev != NULL; i++)
103 if (getenv(howto_names[i].ev) != NULL)
104 howto |= howto_names[i].mask;
105 if (!strcmp(getenv("console"), "comconsole"))
107 if (!strcmp(getenv("console"), "nullconsole"))
113 * Copy the environment into the load area starting at (addr).
114 * Each variable is formatted as <name>=<value>, with a single nul
115 * separating each variable, and a double nul terminating the environment.
118 md_copyenv(vm_offset_t addr)
122 /* traverse the environment */
123 for (ep = environ; ep != NULL; ep = ep->ev_next) {
124 archsw.arch_copyin(ep->ev_name, addr, strlen(ep->ev_name));
125 addr += strlen(ep->ev_name);
126 archsw.arch_copyin("=", addr, 1);
128 if (ep->ev_value != NULL) {
129 archsw.arch_copyin(ep->ev_value, addr, strlen(ep->ev_value));
130 addr += strlen(ep->ev_value);
132 archsw.arch_copyin("", addr, 1);
135 archsw.arch_copyin("", addr, 1);
141 * Copy module-related data into the load area, where it can be
142 * used as a directory for loaded modules.
144 * Module data is presented in a self-describing format. Each datum
145 * is preceded by a 32-bit identifier and a 32-bit size field.
147 * Currently, the following data are saved:
149 * MOD_NAME (variable) module name (string)
150 * MOD_TYPE (variable) module type (string)
151 * MOD_ARGS (variable) module parameters (string)
152 * MOD_ADDR sizeof(vm_offset_t) module load address
153 * MOD_SIZE sizeof(size_t) module size
154 * MOD_METADATA (variable) type-specific metadata
159 #define COPY32(v, a, c) { \
162 archsw.arch_copyin(&x, a, sizeof(x)); \
166 #define MOD_STR(t, a, s, c) { \
168 COPY32(strlen(s) + 1, a, c) \
170 archsw.arch_copyin(s, a, strlen(s) + 1);\
171 a += roundup(strlen(s) + 1, align); \
174 #define MOD_NAME(a, s, c) MOD_STR(MODINFO_NAME, a, s, c)
175 #define MOD_TYPE(a, s, c) MOD_STR(MODINFO_TYPE, a, s, c)
176 #define MOD_ARGS(a, s, c) MOD_STR(MODINFO_ARGS, a, s, c)
178 #define MOD_VAR(t, a, s, c) { \
180 COPY32(sizeof(s), a, c); \
182 archsw.arch_copyin(&s, a, sizeof(s)); \
183 a += roundup(sizeof(s), align); \
186 #define MOD_ADDR(a, s, c) MOD_VAR(MODINFO_ADDR, a, s, c)
187 #define MOD_SIZE(a, s, c) MOD_VAR(MODINFO_SIZE, a, s, c)
189 #define MOD_METADATA(a, mm, c) { \
190 COPY32(MODINFO_METADATA | mm->md_type, a, c);\
191 COPY32(mm->md_size, a, c); \
193 archsw.arch_copyin(mm->md_data, a, mm->md_size);\
194 a += roundup(mm->md_size, align); \
197 #define MOD_END(a, c) { \
198 COPY32(MODINFO_END, a, c); \
203 md_copymodules(vm_offset_t addr, int kern64)
205 struct preloaded_file *fp;
206 struct file_metadata *md;
211 /* start with the first module on the list, should be the kernel */
212 for (fp = file_findfile(NULL, NULL); fp != NULL; fp = fp->f_next) {
214 MOD_NAME(addr, fp->f_name, c); /* this field must come first */
215 MOD_TYPE(addr, fp->f_type, c);
217 MOD_ARGS(addr, fp->f_args, c);
219 scratch64 = fp->f_addr;
220 MOD_ADDR(addr, scratch64, c);
221 scratch64 = fp->f_size;
222 MOD_SIZE(addr, scratch64, c);
224 MOD_ADDR(addr, fp->f_addr, c);
225 MOD_SIZE(addr, fp->f_size, c);
227 for (md = fp->f_metadata; md != NULL; md = md->md_next) {
228 if (!(md->md_type & MODINFOMD_NOCOPY)) {
229 MOD_METADATA(addr, md, c);
238 * Load the information expected by a powerpc kernel.
240 * - The 'boothowto' argument is constructed
241 * - The 'bootdev' argument is constructed
242 * - The kernel environment is copied into kernel space.
243 * - Module metadata are formatted and placed in kernel space.
246 md_load_dual(char *args, vm_offset_t *modulep, int kern64)
248 struct preloaded_file *kfp;
249 struct preloaded_file *xp;
250 struct file_metadata *md;
259 align = kern64 ? 8 : 4;
260 howto = md_getboothowto(args);
263 * Allow the environment variable 'rootdev' to override the supplied device
264 * This should perhaps go to MI code and/or have $rootdev tested/set by
265 * MI code before launching the kernel.
267 rootdevname = getenv("rootdev");
268 if (rootdevname == NULL)
269 rootdevname = getenv("currdev");
270 /* Try reading the /etc/fstab file to select the root device */
271 getrootmount(rootdevname);
273 /* find the last module in the chain */
275 for (xp = file_findfile(NULL, NULL); xp != NULL; xp = xp->f_next) {
276 if (addr < (xp->f_addr + xp->f_size))
277 addr = xp->f_addr + xp->f_size;
279 /* pad to a page boundary */
280 addr = roundup(addr, PAGE_SIZE);
282 /* copy our environment */
284 addr = md_copyenv(addr);
286 /* pad to a page boundary */
287 addr = roundup(addr, PAGE_SIZE);
290 kfp = file_findfile(NULL, kern64 ? "elf64 kernel" : "elf32 kernel");
292 kfp = file_findfile(NULL, "elf kernel");
294 panic("can't find kernel file");
295 file_addmetadata(kfp, MODINFOMD_HOWTO, sizeof howto, &howto);
298 file_addmetadata(kfp, MODINFOMD_ENVP, sizeof scratch64, &scratch64);
300 file_addmetadata(kfp, MODINFOMD_KERNEND, sizeof scratch64, &scratch64);
302 file_addmetadata(kfp, MODINFOMD_ENVP, sizeof envp, &envp);
303 file_addmetadata(kfp, MODINFOMD_KERNEND, sizeof kernend, &kernend);
307 size = md_copymodules(0, kern64);
308 kernend = roundup(addr + size, PAGE_SIZE);
310 md = file_findmetadata(kfp, MODINFOMD_KERNEND);
313 bcopy(&scratch64, md->md_data, sizeof scratch64);
315 bcopy(&kernend, md->md_data, sizeof kernend);
318 (void)md_copymodules(addr, kern64);
324 md_load(char *args, vm_offset_t *modulep)
326 return (md_load_dual(args, modulep, 0));
330 md_load64(char *args, vm_offset_t *modulep)
332 return (md_load_dual(args, modulep, 1));