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>
31 #include <sys/param.h>
32 #include <sys/linker.h>
34 #include <sys/reboot.h>
35 #if defined(LOADER_FDT_SUPPORT)
36 #include <fdt_platform.h>
40 #include <machine/elf.h>
42 #include <machine/metadata.h>
44 #include "bootstrap.h"
47 #ifdef LOADER_GELI_SUPPORT
52 md_getboothowto(char *kargs)
57 howto = boot_parse_cmdline(kargs);
58 howto |= boot_env_to_howto();
59 if (!strcmp(getenv("console"), "comconsole"))
61 if (!strcmp(getenv("console"), "nullconsole"))
67 * Load the information expected by a kernel.
69 * - The 'boothowto' argument is constructed
70 * - The 'bootdev' argument is constructed
71 * - The kernel environment is copied into kernel space.
72 * - Module metadata are formatted and placed in kernel space.
75 md_load_dual(char *args, vm_offset_t *modulep, vm_offset_t *dtb, int kern64)
77 struct preloaded_file *kfp;
78 struct preloaded_file *xp;
79 struct file_metadata *md;
83 #if defined(LOADER_FDT_SUPPORT)
95 * These metadata addreses must be converted for kernel after
99 MODINFOMD_SSYM, MODINFOMD_ESYM, MODINFOMD_KERNEND,
101 #if defined(LOADER_FDT_SUPPORT)
107 howto = md_getboothowto(args);
110 * Allow the environment variable 'rootdev' to override the supplied
111 * device. This should perhaps go to MI code and/or have $rootdev
112 * tested/set by MI code before launching the kernel.
114 rootdevname = getenv("rootdev");
115 if (rootdevname == NULL)
116 rootdevname = getenv("currdev");
117 /* Try reading the /etc/fstab file to select the root device */
118 getrootmount(rootdevname);
120 /* Find the last module in the chain */
122 for (xp = file_findfile(NULL, NULL); xp != NULL; xp = xp->f_next) {
123 if (addr < (xp->f_addr + xp->f_size))
124 addr = xp->f_addr + xp->f_size;
126 /* Pad to a page boundary */
127 addr = roundup(addr, PAGE_SIZE);
129 /* Copy our environment */
131 addr = md_copyenv(addr);
133 /* Pad to a page boundary */
134 addr = roundup(addr, PAGE_SIZE);
136 #if defined(LOADER_FDT_SUPPORT)
139 #if defined(__powerpc__)
140 if (getenv("usefdt") != NULL)
143 size = fdt_copy(addr);
145 addr = roundup(addr + size, PAGE_SIZE);
150 kfp = file_findfile(NULL, kern64 ? "elf64 kernel" : "elf32 kernel");
152 kfp = file_findfile(NULL, "elf kernel");
154 panic("can't find kernel file");
155 file_addmetadata(kfp, MODINFOMD_HOWTO, sizeof howto, &howto);
158 file_addmetadata(kfp, MODINFOMD_ENVP, sizeof scratch64, &scratch64);
159 #if defined(LOADER_FDT_SUPPORT)
162 file_addmetadata(kfp, MODINFOMD_DTBP, sizeof scratch64, &scratch64);
166 file_addmetadata(kfp, MODINFOMD_KERNEND,
167 sizeof scratch64, &scratch64);
169 file_addmetadata(kfp, MODINFOMD_ENVP, sizeof envp, &envp);
170 #if defined(LOADER_FDT_SUPPORT)
172 file_addmetadata(kfp, MODINFOMD_DTBP, sizeof fdtp, &fdtp);
174 file_addmetadata(kfp, MODINFOMD_KERNEND, sizeof kernend, &kernend);
176 #ifdef LOADER_GELI_SUPPORT
177 geli_export_key_metadata(kfp);
181 size = md_copymodules(0, kern64);
182 kernend = roundup(addr + size, PAGE_SIZE);
184 md = file_findmetadata(kfp, MODINFOMD_KERNEND);
187 bcopy(&scratch64, md->md_data, sizeof scratch64);
189 bcopy(&kernend, md->md_data, sizeof kernend);
193 /* Convert addresses to the final VA */
194 *modulep -= __elfN(relocation_offset);
196 /* Do relocation fixup on metadata of each module. */
197 for (xp = file_findfile(NULL, NULL); xp != NULL; xp = xp->f_next) {
198 for (i = 0; i < nitems(mdt); i++) {
199 md = file_findmetadata(xp, mdt[i]);
201 bcopy(md->md_data, &vaddr, sizeof vaddr);
202 vaddr -= __elfN(relocation_offset);
203 bcopy(&vaddr, md->md_data, sizeof vaddr);
209 (void)md_copymodules(addr, kern64);
210 #if defined(LOADER_FDT_SUPPORT)
219 md_load(char *args, vm_offset_t *modulep, vm_offset_t *dtb)
221 return (md_load_dual(args, modulep, dtb, 0));
224 #if defined(__powerpc__)
226 md_load64(char *args, vm_offset_t *modulep, vm_offset_t *dtb)
228 return (md_load_dual(args, modulep, dtb, 1));