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/cpufunc.h>
36 #include <machine/metadata.h>
37 #include <machine/psl.h>
38 #include <machine/specialreg.h>
39 #include "bootstrap.h"
43 #ifdef LOADER_GELI_SUPPORT
46 static const size_t keybuf_size = sizeof(struct keybuf) +
47 (GELI_MAX_KEYS * sizeof(struct keybuf_ent));
51 * Copy module-related data into the load area, where it can be
52 * used as a directory for loaded modules.
54 * Module data is presented in a self-describing format. Each datum
55 * is preceded by a 32-bit identifier and a 32-bit size field.
57 * Currently, the following data are saved:
59 * MOD_NAME (variable) module name (string)
60 * MOD_TYPE (variable) module type (string)
61 * MOD_ARGS (variable) module parameters (string)
62 * MOD_ADDR sizeof(vm_offset_t) module load address
63 * MOD_SIZE sizeof(size_t) module size
64 * MOD_METADATA (variable) type-specific metadata
66 #define COPY32(v, a, c) { \
69 i386_copyin(&x, a, sizeof(x)); \
73 #define MOD_STR(t, a, s, c) { \
75 COPY32(strlen(s) + 1, a, c); \
77 i386_copyin(s, a, strlen(s) + 1); \
78 a += roundup(strlen(s) + 1, sizeof(u_int64_t));\
81 #define MOD_NAME(a, s, c) MOD_STR(MODINFO_NAME, a, s, c)
82 #define MOD_TYPE(a, s, c) MOD_STR(MODINFO_TYPE, a, s, c)
83 #define MOD_ARGS(a, s, c) MOD_STR(MODINFO_ARGS, a, s, c)
85 #define MOD_VAR(t, a, s, c) { \
87 COPY32(sizeof(s), a, c); \
89 i386_copyin(&s, a, sizeof(s)); \
90 a += roundup(sizeof(s), sizeof(u_int64_t)); \
93 #define MOD_ADDR(a, s, c) MOD_VAR(MODINFO_ADDR, a, s, c)
94 #define MOD_SIZE(a, s, c) MOD_VAR(MODINFO_SIZE, a, s, c)
96 #define MOD_METADATA(a, mm, c) { \
97 COPY32(MODINFO_METADATA | mm->md_type, a, c); \
98 COPY32(mm->md_size, a, c); \
100 i386_copyin(mm->md_data, a, mm->md_size); \
101 a += roundup(mm->md_size, sizeof(u_int64_t));\
104 #define MOD_END(a, c) { \
105 COPY32(MODINFO_END, a, c); \
110 bi_copymodules64(vm_offset_t addr)
112 struct preloaded_file *fp;
113 struct file_metadata *md;
118 /* start with the first module on the list, should be the kernel */
119 for (fp = file_findfile(NULL, NULL); fp != NULL; fp = fp->f_next) {
121 MOD_NAME(addr, fp->f_name, c); /* this field must come first */
122 MOD_TYPE(addr, fp->f_type, c);
124 MOD_ARGS(addr, fp->f_args, c);
126 MOD_ADDR(addr, v, c);
128 MOD_SIZE(addr, v, c);
129 for (md = fp->f_metadata; md != NULL; md = md->md_next)
130 if (!(md->md_type & MODINFOMD_NOCOPY))
131 MOD_METADATA(addr, md, c);
138 * Check to see if this CPU supports long mode.
146 unsigned int regs[4];
148 /* Check for presence of "cpuid". */
149 eflags = read_eflags();
150 write_eflags(eflags ^ PSL_ID);
151 if (!((eflags ^ read_eflags()) & PSL_ID))
154 /* Fetch the vendor string. */
159 cpu_vendor = (char *)vendor;
161 /* Check for vendors that support AMD features. */
162 if (strncmp(cpu_vendor, INTEL_VENDOR_ID, 12) != 0 &&
163 strncmp(cpu_vendor, AMD_VENDOR_ID, 12) != 0 &&
164 strncmp(cpu_vendor, CENTAUR_VENDOR_ID, 12) != 0)
167 /* Has to support AMD features. */
168 do_cpuid(0x80000000, regs);
169 if (!(regs[0] >= 0x80000001))
172 /* Check for long mode. */
173 do_cpuid(0x80000001, regs);
174 return (regs[3] & AMDID_LM);
178 * Load the information expected by an amd64 kernel.
180 * - The 'boothowto' argument is constructed
181 * - The 'bootdev' argument is constructed
182 * - The 'bootinfo' struct is constructed, and copied into the kernel space.
183 * - The kernel environment is copied into kernel space.
184 * - Module metadata are formatted and placed in kernel space.
187 bi_load64(char *args, vm_offset_t addr, vm_offset_t *modulep,
188 vm_offset_t *kernendp, int add_smap)
190 struct preloaded_file *xp, *kfp;
191 struct i386_devdesc *rootdev;
192 struct file_metadata *md;
199 #ifdef LOADER_GELI_SUPPORT
200 char buf[keybuf_size];
201 struct keybuf *keybuf = (struct keybuf *)buf;
204 if (!bi_checkcpu()) {
205 printf("CPU doesn't support long mode\n");
209 howto = bi_getboothowto(args);
212 * Allow the environment variable 'rootdev' to override the supplied device
213 * This should perhaps go to MI code and/or have $rootdev tested/set by
214 * MI code before launching the kernel.
216 rootdevname = getenv("rootdev");
217 i386_getdev((void **)(&rootdev), rootdevname, NULL);
218 if (rootdev == NULL) { /* bad $rootdev/$currdev */
219 printf("can't determine root device\n");
223 /* Try reading the /etc/fstab file to select the root device */
224 getrootmount(i386_fmtdev((void *)rootdev));
227 /* find the last module in the chain */
228 for (xp = file_findfile(NULL, NULL); xp != NULL; xp = xp->f_next) {
229 if (addr < (xp->f_addr + xp->f_size))
230 addr = xp->f_addr + xp->f_size;
233 /* pad to a page boundary */
234 addr = roundup(addr, PAGE_SIZE);
236 /* place the metadata before anything */
237 module = *modulep = addr;
239 kfp = file_findfile(NULL, "elf kernel");
241 kfp = file_findfile(NULL, "elf64 kernel");
243 panic("can't find kernel file");
244 kernend = 0; /* fill it in later */
245 file_addmetadata(kfp, MODINFOMD_HOWTO, sizeof howto, &howto);
246 file_addmetadata(kfp, MODINFOMD_ENVP, sizeof envp, &envp);
247 file_addmetadata(kfp, MODINFOMD_KERNEND, sizeof kernend, &kernend);
248 file_addmetadata(kfp, MODINFOMD_MODULEP, sizeof module, &module);
250 bios_addsmapdata(kfp);
252 #ifdef LOADER_GELI_SUPPORT
253 geli_fill_keybuf(keybuf);
254 file_addmetadata(kfp, MODINFOMD_KEYBUF, keybuf_size, buf);
255 bzero(buf, sizeof(buf));
258 size = bi_copymodules64(0);
260 /* copy our environment */
261 envp = roundup(addr + size, PAGE_SIZE);
262 addr = bi_copyenv(envp);
265 kernend = roundup(addr, PAGE_SIZE);
268 /* patch MODINFOMD_KERNEND */
269 md = file_findmetadata(kfp, MODINFOMD_KERNEND);
270 bcopy(&kernend, md->md_data, sizeof kernend);
272 /* patch MODINFOMD_ENVP */
273 md = file_findmetadata(kfp, MODINFOMD_ENVP);
274 bcopy(&envp, md->md_data, sizeof envp);
276 /* copy module list and metadata */
277 (void)bi_copymodules64(*modulep);