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
;
27 #define MAX(a,b) ((a) > (b) ? (a) : (b))
30 int valid_elf_image (unsigned long addr
);
31 unsigned long load_elf_image (unsigned long addr
);
33 /* ======================================================================
34 * Interpreter command to boot an arbitrary ELF image from memory.
35 * ====================================================================== */
36 int do_bootelf (cmd_tbl_t
*cmdtp
, int flag
, int argc
, char *argv
[])
38 unsigned long addr
; /* Address of the ELF image */
39 unsigned long rc
; /* Return value from user code */
41 /* -------------------------------------------------- */
47 addr
= simple_strtoul (argv
[1], NULL
, 16);
49 if (!valid_elf_image (addr
))
52 addr
= load_elf_image (addr
);
54 printf ("## Starting application at 0x%08lx ...\n", addr
);
57 * QNX images require the data cache is disabled.
58 * Data cache is already flushed, so just turn it off.
64 * pass address parameter as argv[0] (aka command name),
65 * and all remaining args
67 rc
= ((ulong (*)(int, char *[])) addr
) (--argc
, &argv
[1]);
71 printf ("## Application terminated, rc = 0x%lx\n", rc
);
75 /* ======================================================================
76 * Interpreter command to boot VxWorks from a memory image. The image can
77 * be either an ELF image or a raw binary. Will attempt to setup the
78 * bootline and other parameters correctly.
79 * ====================================================================== */
80 int do_bootvx (cmd_tbl_t
*cmdtp
, int flag
, int argc
, char *argv
[])
82 unsigned long addr
; /* Address of image */
83 unsigned long bootaddr
; /* Address to put the bootline */
84 char *bootline
; /* Text of the bootline */
85 char *tmp
; /* Temporary char pointer */
87 #if defined(CONFIG_4xx) || defined(CONFIG_IOP480)
88 char build_buf
[80]; /* Buffer for building the bootline */
90 /* -------------------------------------------------- */
93 * Check the loadaddr variable.
94 * If we don't know where the image is then we're done.
100 addr
= simple_strtoul (argv
[1], NULL
, 16);
102 #if defined(CONFIG_CMD_NET)
103 /* Check to see if we need to tftp the image ourselves before starting */
105 if ((argc
== 2) && (strcmp (argv
[1], "tftp") == 0)) {
106 if (NetLoop (TFTP
) <= 0)
108 printf ("Automatic boot of VxWorks image at address 0x%08lx ... \n", addr
);
112 /* This should equate
113 * to NV_RAM_ADRS + NV_BOOT_OFFSET + NV_ENET_OFFSET
114 * from the VxWorks BSP header files.
115 * This will vary from board to board
118 #if defined(CONFIG_WALNUT)
119 tmp
= (char *) CFG_NVRAM_BASE_ADDR
+ 0x500;
120 memcpy ((char *) tmp
, (char *) &gd
->bd
->bi_enetaddr
[3], 3);
121 #elif defined(CFG_VXWORKS_MAC_PTR)
122 tmp
= (char *) CFG_VXWORKS_MAC_PTR
;
123 memcpy ((char *) tmp
, (char *) &gd
->bd
->bi_enetaddr
[0], 6);
125 puts ("## Ethernet MAC address not copied to NV RAM\n");
129 * Use bootaddr to find the location in memory that VxWorks
130 * will look for the bootline string. The default value for
131 * PowerPC is LOCAL_MEM_LOCAL_ADRS + BOOT_LINE_OFFSET which
135 if ((tmp
= getenv ("bootaddr")) == NULL
)
138 bootaddr
= simple_strtoul (tmp
, NULL
, 16);
141 * Check to see if the bootline is defined in the 'bootargs'
142 * parameter. If it is not defined, we may be able to
146 if ((bootline
= getenv ("bootargs")) != NULL
) {
147 memcpy ((void *) bootaddr
, bootline
, MAX(strlen(bootline
), 255));
148 flush_cache (bootaddr
, MAX(strlen(bootline
), 255));
150 #if defined(CONFIG_4xx)
151 sprintf (build_buf
, "ibmEmac(0,0)");
153 if ((tmp
= getenv ("hostname")) != NULL
) {
154 sprintf (&build_buf
[strlen (build_buf
- 1)],
157 sprintf (&build_buf
[strlen (build_buf
- 1)],
161 if ((tmp
= getenv ("ipaddr")) != NULL
) {
162 sprintf (&build_buf
[strlen (build_buf
- 1)],
165 memcpy ((void *)bootaddr
, build_buf
, MAX(strlen(build_buf
), 255));
166 flush_cache (bootaddr
, MAX(strlen(build_buf
), 255));
167 #elif defined(CONFIG_IOP480)
168 sprintf (build_buf
, "dc(0,0)");
170 if ((tmp
= getenv ("hostname")) != NULL
) {
171 sprintf (&build_buf
[strlen (build_buf
- 1)],
174 sprintf (&build_buf
[strlen (build_buf
- 1)],
178 if ((tmp
= getenv ("ipaddr")) != NULL
) {
179 sprintf (&build_buf
[strlen (build_buf
- 1)],
182 memcpy ((void *) bootaddr
, build_buf
, MAX(strlen(build_buf
), 255));
183 flush_cache (bootaddr
, MAX(strlen(build_buf
), 255));
187 * I'm not sure what the device should be for other
188 * PPC flavors, the hostname and ipaddr should be ok
192 puts ("No bootargs defined\n");
198 * If the data at the load address is an elf image, then
199 * treat it like an elf image. Otherwise, assume that it is a
203 if (valid_elf_image (addr
)) {
204 addr
= load_elf_image (addr
);
206 puts ("## Not an ELF image, assuming binary\n");
207 /* leave addr as load_addr */
210 printf ("## Using bootline (@ 0x%lx): %s\n", bootaddr
,
212 printf ("## Starting vxWorks at 0x%08lx ...\n", addr
);
214 ((void (*)(void)) addr
) ();
216 puts ("## vxWorks terminated\n");
220 /* ======================================================================
221 * Determine if a valid ELF image exists at the given memory location.
222 * First looks at the ELF header magic field, the makes sure that it is
223 * executable and makes sure that it is for a PowerPC.
224 * ====================================================================== */
225 int valid_elf_image (unsigned long addr
)
227 Elf32_Ehdr
*ehdr
; /* Elf header structure pointer */
229 /* -------------------------------------------------- */
231 ehdr
= (Elf32_Ehdr
*) addr
;
233 if (!IS_ELF (*ehdr
)) {
234 printf ("## No elf image at address 0x%08lx\n", addr
);
238 if (ehdr
->e_type
!= ET_EXEC
) {
239 printf ("## Not a 32-bit elf image at address 0x%08lx\n",
245 if (ehdr
->e_machine
!= EM_PPC
) {
246 printf ("## Not a PowerPC elf image at address 0x%08lx\n",
256 /* ======================================================================
257 * A very simple elf loader, assumes the image is valid, returns the
258 * entry point address.
259 * ====================================================================== */
260 unsigned long load_elf_image (unsigned long addr
)
262 Elf32_Ehdr
*ehdr
; /* Elf header structure pointer */
263 Elf32_Shdr
*shdr
; /* Section header structure pointer */
264 unsigned char *strtab
= 0; /* String table pointer */
265 unsigned char *image
; /* Binary image pointer */
266 int i
; /* Loop counter */
268 /* -------------------------------------------------- */
270 ehdr
= (Elf32_Ehdr
*) addr
;
272 /* Find the section header string table for output info */
273 shdr
= (Elf32_Shdr
*) (addr
+ ehdr
->e_shoff
+
274 (ehdr
->e_shstrndx
* sizeof (Elf32_Shdr
)));
276 if (shdr
->sh_type
== SHT_STRTAB
)
277 strtab
= (unsigned char *) (addr
+ shdr
->sh_offset
);
279 /* Load each appropriate section */
280 for (i
= 0; i
< ehdr
->e_shnum
; ++i
) {
281 shdr
= (Elf32_Shdr
*) (addr
+ ehdr
->e_shoff
+
282 (i
* sizeof (Elf32_Shdr
)));
284 if (!(shdr
->sh_flags
& SHF_ALLOC
)
285 || shdr
->sh_addr
== 0 || shdr
->sh_size
== 0) {
290 printf ("%sing %s @ 0x%08lx (%ld bytes)\n",
291 (shdr
->sh_type
== SHT_NOBITS
) ?
293 &strtab
[shdr
->sh_name
],
294 (unsigned long) shdr
->sh_addr
,
295 (long) shdr
->sh_size
);
298 if (shdr
->sh_type
== SHT_NOBITS
) {
299 memset ((void *)shdr
->sh_addr
, 0, shdr
->sh_size
);
301 image
= (unsigned char *) addr
+ shdr
->sh_offset
;
302 memcpy ((void *) shdr
->sh_addr
,
303 (const void *) image
,
306 flush_cache (shdr
->sh_addr
, shdr
->sh_size
);
309 return ehdr
->e_entry
;
312 /* ====================================================================== */
314 bootelf
, 2, 0, do_bootelf
,
315 "bootelf - Boot from an ELF image in memory\n",
316 " [address] - load address of ELF image.\n"
320 bootvx
, 2, 0, do_bootvx
,
321 "bootvx - Boot vxWorks from an ELF image\n",
322 " [address] - load address of vxWorks ELF image.\n"