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git.ipfire.org Git - people/ms/u-boot.git/blob - common/cmd_elf.c
2 * Copyright (c) 2001 William L. Pitts
5 * Redistribution and use in source and binary forms are freely
6 * permitted provided that the above copyright notice and this
7 * paragraph and the following disclaimer are duplicated in all
10 * This software is provided "AS IS" and without any express or
11 * implied warranties, including, without limitation, the implied
12 * warranties of merchantability and fitness for a particular
18 #include <linux/ctype.h>
22 #if defined(CONFIG_WALNUT) || defined(CFG_VXWORKS_MAC_PTR)
23 DECLARE_GLOBAL_DATA_PTR
;
26 #if (CONFIG_COMMANDS & CFG_CMD_ELF)
29 #define MAX(a,b) ((a) > (b) ? (a) : (b))
32 int valid_elf_image (unsigned long addr
);
33 unsigned long load_elf_image (unsigned long addr
);
35 /* ======================================================================
36 * Interpreter command to boot an arbitrary ELF image from memory.
37 * ====================================================================== */
38 int do_bootelf (cmd_tbl_t
*cmdtp
, int flag
, int argc
, char *argv
[])
40 unsigned long addr
; /* Address of the ELF image */
41 unsigned long rc
; /* Return value from user code */
43 /* -------------------------------------------------- */
49 addr
= simple_strtoul (argv
[1], NULL
, 16);
51 if (!valid_elf_image (addr
))
54 addr
= load_elf_image (addr
);
56 printf ("## Starting application at 0x%08lx ...\n", addr
);
59 * QNX images require the data cache is disabled.
60 * Data cache is already flushed, so just turn it off.
66 * pass address parameter as argv[0] (aka command name),
67 * and all remaining args
69 rc
= ((ulong (*)(int, char *[])) addr
) (--argc
, &argv
[1]);
73 printf ("## Application terminated, rc = 0x%lx\n", rc
);
77 /* ======================================================================
78 * Interpreter command to boot VxWorks from a memory image. The image can
79 * be either an ELF image or a raw binary. Will attempt to setup the
80 * bootline and other parameters correctly.
81 * ====================================================================== */
82 int do_bootvx (cmd_tbl_t
*cmdtp
, int flag
, int argc
, char *argv
[])
84 unsigned long addr
; /* Address of image */
85 unsigned long bootaddr
; /* Address to put the bootline */
86 char *bootline
; /* Text of the bootline */
87 char *tmp
; /* Temporary char pointer */
89 #if defined(CONFIG_4xx) || defined(CONFIG_IOP480)
90 char build_buf
[80]; /* Buffer for building the bootline */
92 /* -------------------------------------------------- */
95 * Check the loadaddr variable.
96 * If we don't know where the image is then we're done.
102 addr
= simple_strtoul (argv
[1], NULL
, 16);
104 #if (CONFIG_COMMANDS & CFG_CMD_NET)
105 /* Check to see if we need to tftp the image ourselves before starting */
107 if ((argc
== 2) && (strcmp (argv
[1], "tftp") == 0)) {
108 if (NetLoop (TFTP
) <= 0)
110 printf ("Automatic boot of VxWorks image at address 0x%08lx ... \n", addr
);
114 /* This should equate
115 * to NV_RAM_ADRS + NV_BOOT_OFFSET + NV_ENET_OFFSET
116 * from the VxWorks BSP header files.
117 * This will vary from board to board
120 #if defined(CONFIG_WALNUT)
121 tmp
= (char *) CFG_NVRAM_BASE_ADDR
+ 0x500;
122 memcpy ((char *) tmp
, (char *) &gd
->bd
->bi_enetaddr
[3], 3);
123 #elif defined(CFG_VXWORKS_MAC_PTR)
124 tmp
= (char *) CFG_VXWORKS_MAC_PTR
;
125 memcpy ((char *) tmp
, (char *) &gd
->bd
->bi_enetaddr
[0], 6);
127 puts ("## Ethernet MAC address not copied to NV RAM\n");
131 * Use bootaddr to find the location in memory that VxWorks
132 * will look for the bootline string. The default value for
133 * PowerPC is LOCAL_MEM_LOCAL_ADRS + BOOT_LINE_OFFSET which
137 if ((tmp
= getenv ("bootaddr")) == NULL
)
140 bootaddr
= simple_strtoul (tmp
, NULL
, 16);
143 * Check to see if the bootline is defined in the 'bootargs'
144 * parameter. If it is not defined, we may be able to
148 if ((bootline
= getenv ("bootargs")) != NULL
) {
149 memcpy ((void *) bootaddr
, bootline
, MAX(strlen(bootline
), 255));
150 flush_cache (bootaddr
, MAX(strlen(bootline
), 255));
152 #if defined(CONFIG_4xx)
153 sprintf (build_buf
, "ibmEmac(0,0)");
155 if ((tmp
= getenv ("hostname")) != NULL
) {
156 sprintf (&build_buf
[strlen (build_buf
- 1)],
159 sprintf (&build_buf
[strlen (build_buf
- 1)],
163 if ((tmp
= getenv ("ipaddr")) != NULL
) {
164 sprintf (&build_buf
[strlen (build_buf
- 1)],
167 memcpy ((void *)bootaddr
, build_buf
, MAX(strlen(build_buf
), 255));
168 flush_cache (bootaddr
, MAX(strlen(build_buf
), 255));
169 #elif defined(CONFIG_IOP480)
170 sprintf (build_buf
, "dc(0,0)");
172 if ((tmp
= getenv ("hostname")) != NULL
) {
173 sprintf (&build_buf
[strlen (build_buf
- 1)],
176 sprintf (&build_buf
[strlen (build_buf
- 1)],
180 if ((tmp
= getenv ("ipaddr")) != NULL
) {
181 sprintf (&build_buf
[strlen (build_buf
- 1)],
184 memcpy ((void *) bootaddr
, build_buf
, MAX(strlen(build_buf
), 255));
185 flush_cache (bootaddr
, MAX(strlen(build_buf
), 255));
189 * I'm not sure what the device should be for other
190 * PPC flavors, the hostname and ipaddr should be ok
194 puts ("No bootargs defined\n");
200 * If the data at the load address is an elf image, then
201 * treat it like an elf image. Otherwise, assume that it is a
205 if (valid_elf_image (addr
)) {
206 addr
= load_elf_image (addr
);
208 puts ("## Not an ELF image, assuming binary\n");
209 /* leave addr as load_addr */
212 printf ("## Using bootline (@ 0x%lx): %s\n", bootaddr
,
214 printf ("## Starting vxWorks at 0x%08lx ...\n", addr
);
216 ((void (*)(void)) addr
) ();
218 puts ("## vxWorks terminated\n");
222 /* ======================================================================
223 * Determine if a valid ELF image exists at the given memory location.
224 * First looks at the ELF header magic field, the makes sure that it is
225 * executable and makes sure that it is for a PowerPC.
226 * ====================================================================== */
227 int valid_elf_image (unsigned long addr
)
229 Elf32_Ehdr
*ehdr
; /* Elf header structure pointer */
231 /* -------------------------------------------------- */
233 ehdr
= (Elf32_Ehdr
*) addr
;
235 if (!IS_ELF (*ehdr
)) {
236 printf ("## No elf image at address 0x%08lx\n", addr
);
240 if (ehdr
->e_type
!= ET_EXEC
) {
241 printf ("## Not a 32-bit elf image at address 0x%08lx\n",
247 if (ehdr
->e_machine
!= EM_PPC
) {
248 printf ("## Not a PowerPC elf image at address 0x%08lx\n",
258 /* ======================================================================
259 * A very simple elf loader, assumes the image is valid, returns the
260 * entry point address.
261 * ====================================================================== */
262 unsigned long load_elf_image (unsigned long addr
)
264 Elf32_Ehdr
*ehdr
; /* Elf header structure pointer */
265 Elf32_Shdr
*shdr
; /* Section header structure pointer */
266 unsigned char *strtab
= 0; /* String table pointer */
267 unsigned char *image
; /* Binary image pointer */
268 int i
; /* Loop counter */
270 /* -------------------------------------------------- */
272 ehdr
= (Elf32_Ehdr
*) addr
;
274 /* Find the section header string table for output info */
275 shdr
= (Elf32_Shdr
*) (addr
+ ehdr
->e_shoff
+
276 (ehdr
->e_shstrndx
* sizeof (Elf32_Shdr
)));
278 if (shdr
->sh_type
== SHT_STRTAB
)
279 strtab
= (unsigned char *) (addr
+ shdr
->sh_offset
);
281 /* Load each appropriate section */
282 for (i
= 0; i
< ehdr
->e_shnum
; ++i
) {
283 shdr
= (Elf32_Shdr
*) (addr
+ ehdr
->e_shoff
+
284 (i
* sizeof (Elf32_Shdr
)));
286 if (!(shdr
->sh_flags
& SHF_ALLOC
)
287 || shdr
->sh_addr
== 0 || shdr
->sh_size
== 0) {
292 printf ("%sing %s @ 0x%08lx (%ld bytes)\n",
293 (shdr
->sh_type
== SHT_NOBITS
) ?
295 &strtab
[shdr
->sh_name
],
296 (unsigned long) shdr
->sh_addr
,
297 (long) shdr
->sh_size
);
300 if (shdr
->sh_type
== SHT_NOBITS
) {
301 memset ((void *)shdr
->sh_addr
, 0, shdr
->sh_size
);
303 image
= (unsigned char *) addr
+ shdr
->sh_offset
;
304 memcpy ((void *) shdr
->sh_addr
,
305 (const void *) image
,
308 flush_cache (shdr
->sh_addr
, shdr
->sh_size
);
311 return ehdr
->e_entry
;
314 /* ====================================================================== */
316 bootelf
, 2, 0, do_bootelf
,
317 "bootelf - Boot from an ELF image in memory\n",
318 " [address] - load address of ELF image.\n"
322 bootvx
, 2, 0, do_bootvx
,
323 "bootvx - Boot vxWorks from an ELF image\n",
324 " [address] - load address of vxWorks ELF image.\n"
327 #endif /* CFG_CMD_ELF */