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 */