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/linker.h>
36 #include <sys/reboot.h>
37 #if defined(LOADER_FDT_SUPPORT)
38 #include <fdt_platform.h>
42 #include <machine/elf.h>
44 #include <machine/metadata.h>
46 #include "bootstrap.h"
49 #ifdef LOADER_GELI_SUPPORT
54 md_getboothowto(char *kargs)
59 howto = boot_parse_cmdline(kargs);
60 howto |= boot_env_to_howto();
61 if (!strcmp(getenv("console"), "comconsole"))
63 if (!strcmp(getenv("console"), "nullconsole"))
69 * Load the information expected by a kernel.
71 * - The 'boothowto' argument is constructed
72 * - The 'bootdev' argument is constructed
73 * - The kernel environment is copied into kernel space.
74 * - Module metadata are formatted and placed in kernel space.
77 md_load_dual(char *args, vm_offset_t *modulep, vm_offset_t *dtb, int kern64)
79 struct preloaded_file *kfp;
80 struct preloaded_file *xp;
81 struct file_metadata *md;
85 #if defined(LOADER_FDT_SUPPORT)
97 * These metadata addreses must be converted for kernel after
101 MODINFOMD_SSYM, MODINFOMD_ESYM, MODINFOMD_KERNEND,
103 #if defined(LOADER_FDT_SUPPORT)
109 howto = md_getboothowto(args);
112 * Allow the environment variable 'rootdev' to override the supplied
113 * device. This should perhaps go to MI code and/or have $rootdev
114 * tested/set by MI code before launching the kernel.
116 rootdevname = getenv("rootdev");
117 if (rootdevname == NULL)
118 rootdevname = getenv("currdev");
119 /* Try reading the /etc/fstab file to select the root device */
120 getrootmount(rootdevname);
122 /* Find the last module in the chain */
124 for (xp = file_findfile(NULL, NULL); xp != NULL; xp = xp->f_next) {
125 if (addr < (xp->f_addr + xp->f_size))
126 addr = xp->f_addr + xp->f_size;
128 /* Pad to a page boundary */
129 addr = roundup(addr, PAGE_SIZE);
131 /* Copy our environment */
133 addr = md_copyenv(addr);
135 /* Pad to a page boundary */
136 addr = roundup(addr, PAGE_SIZE);
138 #if defined(LOADER_FDT_SUPPORT)
141 #if defined(__powerpc__)
142 if (getenv("usefdt") != NULL)
145 size = fdt_copy(addr);
147 addr = roundup(addr + size, PAGE_SIZE);
152 kfp = file_findfile(NULL, kern64 ? "elf64 kernel" : "elf32 kernel");
154 kfp = file_findfile(NULL, "elf kernel");
156 panic("can't find kernel file");
157 file_addmetadata(kfp, MODINFOMD_HOWTO, sizeof howto, &howto);
160 file_addmetadata(kfp, MODINFOMD_ENVP, sizeof scratch64, &scratch64);
161 #if defined(LOADER_FDT_SUPPORT)
164 file_addmetadata(kfp, MODINFOMD_DTBP, sizeof scratch64, &scratch64);
168 file_addmetadata(kfp, MODINFOMD_KERNEND,
169 sizeof scratch64, &scratch64);
171 file_addmetadata(kfp, MODINFOMD_ENVP, sizeof envp, &envp);
172 #if defined(LOADER_FDT_SUPPORT)
174 file_addmetadata(kfp, MODINFOMD_DTBP, sizeof fdtp, &fdtp);
176 file_addmetadata(kfp, MODINFOMD_KERNEND, sizeof kernend, &kernend);
178 #ifdef LOADER_GELI_SUPPORT
179 geli_export_key_metadata(kfp);
183 size = md_copymodules(0, kern64);
184 kernend = roundup(addr + size, PAGE_SIZE);
186 md = file_findmetadata(kfp, MODINFOMD_KERNEND);
189 bcopy(&scratch64, md->md_data, sizeof scratch64);
191 bcopy(&kernend, md->md_data, sizeof kernend);
195 /* Convert addresses to the final VA */
196 *modulep -= __elfN(relocation_offset);
198 /* Do relocation fixup on metadata of each module. */
199 for (xp = file_findfile(NULL, NULL); xp != NULL; xp = xp->f_next) {
200 for (i = 0; i < nitems(mdt); i++) {
201 md = file_findmetadata(xp, mdt[i]);
203 bcopy(md->md_data, &vaddr, sizeof vaddr);
204 vaddr -= __elfN(relocation_offset);
205 bcopy(&vaddr, md->md_data, sizeof vaddr);
211 (void)md_copymodules(addr, kern64);
212 #if defined(LOADER_FDT_SUPPORT)
221 md_load(char *args, vm_offset_t *modulep, vm_offset_t *dtb)
223 return (md_load_dual(args, modulep, dtb, 0));
226 #if defined(__powerpc__)
228 md_load64(char *args, vm_offset_t *modulep, vm_offset_t *dtb)
230 return (md_load_dual(args, modulep, dtb, 1));