xref: /freebsd/stand/powerpc/ofw/ppc64_elf_freebsd.c (revision 22cf89c938886d14f5796fc49f9f020c23ea8eaf)
1 /*-
2  * Copyright (c) 2001 Benno Rice <benno@FreeBSD.org>
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
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.
13  *
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
24  * SUCH DAMAGE.
25  */
26 
27 #include <sys/cdefs.h>
28 #define __ELF_WORD_SIZE 64
29 
30 #include <sys/param.h>
31 #include <sys/linker.h>
32 
33 #include <machine/metadata.h>
34 #include <machine/elf.h>
35 #include <machine/md_var.h>
36 
37 #include <stand.h>
38 
39 #include "bootstrap.h"
40 #include "libofw.h"
41 #include "openfirm.h"
42 #include "modinfo.h"
43 
44 extern char		end[];
45 extern vm_offset_t	reloc;	/* From <arch>/conf.c */
46 
47 int
48 ppc64_ofw_elf_loadfile(char *filename, uint64_t dest,
49     struct preloaded_file **result)
50 {
51 	int	r;
52 
53 	r = __elfN(loadfile)(filename, dest, result);
54 	if (r != 0)
55 		return (r);
56 
57 	/*
58 	 * No need to sync the icache for modules: this will
59 	 * be done by the kernel after relocation.
60 	 */
61 	if (!strcmp((*result)->f_type, "elf kernel"))
62 		__syncicache((void *) (*result)->f_addr, (*result)->f_size);
63 	return (0);
64 }
65 
66 int
67 ppc64_ofw_elf_exec(struct preloaded_file *fp)
68 {
69 	struct file_metadata	*fmp;
70 	vm_offset_t		mdp, dtbp;
71 	Elf_Ehdr		*e;
72 	int			error;
73 	intptr_t		entry;
74 
75 	if ((fmp = file_findmetadata(fp, MODINFOMD_ELFHDR)) == NULL) {
76 		return(EFTYPE);
77 	}
78 	e = (Elf_Ehdr *)&fmp->md_data;
79 
80 	/* Handle function descriptor for ELFv1 kernels */
81 	if ((e->e_flags & 3) == 2)
82 		entry = e->e_entry;
83 	else
84 		entry = *(uint64_t *)(intptr_t)e->e_entry;
85 
86 	if ((error = md_load64(fp->f_args, &mdp, &dtbp)) != 0)
87 		return (error);
88 
89 	printf("Kernel entry at 0x%x ...\n", entry);
90 
91 	dev_cleanup();
92 
93 	if (dtbp != 0) {
94 		OF_quiesce();
95 		((int (*)(u_long, u_long, u_long, void *, u_long))entry)(dtbp,
96 		    0, 0, (void *)mdp, 0xfb5d104d);
97 	} else {
98 		OF_chain((void *)reloc, end - (char *)reloc, (void *)entry,
99 		    (void *)mdp, 0xfb5d104d);
100 	}
101 
102 	panic("exec returned");
103 }
104 
105 struct file_format	ofw_elf64 =
106 {
107 	ppc64_ofw_elf_loadfile,
108 	ppc64_ofw_elf_exec
109 };
110