1 /*-
2 * Copyright (c) 2001 Benno Rice <benno@FreeBSD.org>
3 * Copyright (c) 2007 Semihalf, Rafal Jaworowski <raj@semihalf.com>
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28 #include <sys/param.h>
29 #include <sys/linker.h>
30
31 #include <machine/md_var.h>
32 #include <machine/metadata.h>
33 #include <machine/elf.h>
34
35 #include <stand.h>
36
37 #include "bootstrap.h"
38 #include "libuboot.h"
39 #include "modinfo.h"
40
41 int
__elfN(uboot_load)42 __elfN(uboot_load)(char *filename, uint64_t dest,
43 struct preloaded_file **result)
44 {
45 int r;
46
47 r = __elfN(loadfile)(filename, dest, result);
48 if (r != 0)
49 return (r);
50
51 #if defined(__powerpc__)
52 /*
53 * No need to sync the icache for modules: this will
54 * be done by the kernel after relocation.
55 */
56 if (!strcmp((*result)->f_type, md_kerntype))
57 __syncicache((void *) (*result)->f_addr, (*result)->f_size);
58 #endif
59 return (0);
60 }
61
62 int
__elfN(uboot_exec)63 __elfN(uboot_exec)(struct preloaded_file *fp)
64 {
65 struct file_metadata *fmp;
66 vm_offset_t mdp;
67 Elf_Ehdr *e;
68 int error;
69 void (*entry)(void *);
70
71 if ((fmp = file_findmetadata(fp, MODINFOMD_ELFHDR)) == NULL)
72 return (EFTYPE);
73
74 e = (Elf_Ehdr *)&fmp->md_data;
75
76 if ((error = md_load(fp->f_args, &mdp, NULL)) != 0)
77 return (error);
78
79 entry = (void *)e->e_entry;
80 printf("Kernel entry at %p...\n", entry);
81
82 dev_cleanup();
83 printf("Kernel args: %s\n", fp->f_args);
84
85 (*entry)((void *)mdp);
86 panic("exec returned");
87 }
88
89 struct file_format uboot_elf = {
90 __elfN(uboot_load),
91 __elfN(uboot_exec)
92 };
93