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 static inline void bootelf_setup(int argc, char *argv[])
33 * QNX images require the data cache is disabled.
34 * Data cache is already flushed, so just turn it off.
39 #ifdef CONFIG_BLACKFIN
45 int valid_elf_image (unsigned long addr);
46 unsigned long load_elf_image (unsigned long addr);
48 /* ======================================================================
49 * Interpreter command to boot an arbitrary ELF image from memory.
50 * ====================================================================== */
51 int do_bootelf (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
53 unsigned long addr; /* Address of the ELF image */
54 unsigned long rc; /* Return value from user code */
56 /* -------------------------------------------------- */
62 addr = simple_strtoul (argv[1], NULL, 16);
64 if (!valid_elf_image (addr))
67 addr = load_elf_image (addr);
69 printf ("## Starting application at 0x%08lx ...\n", addr);
71 bootelf_setup(argc, argv);
74 * pass address parameter as argv[0] (aka command name),
75 * and all remaining args
77 rc = ((ulong (*)(int, char *[])) addr) (--argc, &argv[1]);
81 printf ("## Application terminated, rc = 0x%lx\n", rc);
85 /* ======================================================================
86 * Interpreter command to boot VxWorks from a memory image. The image can
87 * be either an ELF image or a raw binary. Will attempt to setup the
88 * bootline and other parameters correctly.
89 * ====================================================================== */
90 int do_bootvx (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
92 unsigned long addr; /* Address of image */
93 unsigned long bootaddr; /* Address to put the bootline */
94 char *bootline; /* Text of the bootline */
95 char *tmp; /* Temporary char pointer */
97 #if defined(CONFIG_4xx) || defined(CONFIG_IOP480)
98 char build_buf[80]; /* Buffer for building the bootline */
100 /* -------------------------------------------------- */
103 * Check the loadaddr variable.
104 * If we don't know where the image is then we're done.
110 addr = simple_strtoul (argv[1], NULL, 16);
112 #if defined(CONFIG_CMD_NET)
113 /* Check to see if we need to tftp the image ourselves before starting */
115 if ((argc == 2) && (strcmp (argv[1], "tftp") == 0)) {
116 if (NetLoop (TFTP) <= 0)
118 printf ("Automatic boot of VxWorks image at address 0x%08lx ... \n", addr);
122 /* This should equate
123 * to NV_RAM_ADRS + NV_BOOT_OFFSET + NV_ENET_OFFSET
124 * from the VxWorks BSP header files.
125 * This will vary from board to board
128 #if defined(CONFIG_WALNUT)
129 tmp = (char *) CFG_NVRAM_BASE_ADDR + 0x500;
130 memcpy ((char *) tmp, (char *) &gd->bd->bi_enetaddr[3], 3);
131 #elif defined(CFG_VXWORKS_MAC_PTR)
132 tmp = (char *) CFG_VXWORKS_MAC_PTR;
133 memcpy ((char *) tmp, (char *) &gd->bd->bi_enetaddr[0], 6);
135 puts ("## Ethernet MAC address not copied to NV RAM\n");
139 * Use bootaddr to find the location in memory that VxWorks
140 * will look for the bootline string. The default value for
141 * PowerPC is LOCAL_MEM_LOCAL_ADRS + BOOT_LINE_OFFSET which
145 if ((tmp = getenv ("bootaddr")) == NULL)
148 bootaddr = simple_strtoul (tmp, NULL, 16);
151 * Check to see if the bootline is defined in the 'bootargs'
152 * parameter. If it is not defined, we may be able to
156 if ((bootline = getenv ("bootargs")) != NULL) {
157 memcpy ((void *) bootaddr, bootline, MAX(strlen(bootline), 255));
158 flush_cache (bootaddr, MAX(strlen(bootline), 255));
160 #if defined(CONFIG_4xx)
161 sprintf (build_buf, "ibmEmac(0,0)");
163 if ((tmp = getenv ("hostname")) != NULL) {
164 sprintf (&build_buf[strlen (build_buf - 1)],
167 sprintf (&build_buf[strlen (build_buf - 1)],
171 if ((tmp = getenv ("ipaddr")) != NULL) {
172 sprintf (&build_buf[strlen (build_buf - 1)],
175 memcpy ((void *)bootaddr, build_buf, MAX(strlen(build_buf), 255));
176 flush_cache (bootaddr, MAX(strlen(build_buf), 255));
177 #elif defined(CONFIG_IOP480)
178 sprintf (build_buf, "dc(0,0)");
180 if ((tmp = getenv ("hostname")) != NULL) {
181 sprintf (&build_buf[strlen (build_buf - 1)],
184 sprintf (&build_buf[strlen (build_buf - 1)],
188 if ((tmp = getenv ("ipaddr")) != NULL) {
189 sprintf (&build_buf[strlen (build_buf - 1)],
192 memcpy ((void *) bootaddr, build_buf, MAX(strlen(build_buf), 255));
193 flush_cache (bootaddr, MAX(strlen(build_buf), 255));
197 * I'm not sure what the device should be for other
198 * PPC flavors, the hostname and ipaddr should be ok
202 puts ("No bootargs defined\n");
208 * If the data at the load address is an elf image, then
209 * treat it like an elf image. Otherwise, assume that it is a
213 if (valid_elf_image (addr)) {
214 addr = load_elf_image (addr);
216 puts ("## Not an ELF image, assuming binary\n");
217 /* leave addr as load_addr */
220 printf ("## Using bootline (@ 0x%lx): %s\n", bootaddr,
222 printf ("## Starting vxWorks at 0x%08lx ...\n", addr);
224 ((void (*)(void)) addr) ();
226 puts ("## vxWorks terminated\n");
230 /* ======================================================================
231 * Determine if a valid ELF image exists at the given memory location.
232 * First looks at the ELF header magic field, the makes sure that it is
233 * executable and makes sure that it is for a PowerPC.
234 * ====================================================================== */
235 int valid_elf_image (unsigned long addr)
237 Elf32_Ehdr *ehdr; /* Elf header structure pointer */
239 /* -------------------------------------------------- */
241 ehdr = (Elf32_Ehdr *) addr;
243 if (!IS_ELF (*ehdr)) {
244 printf ("## No elf image at address 0x%08lx\n", addr);
248 if (ehdr->e_type != ET_EXEC) {
249 printf ("## Not a 32-bit elf image at address 0x%08lx\n",
255 if (ehdr->e_machine != EM_PPC) {
256 printf ("## Not a PowerPC elf image at address 0x%08lx\n",
266 /* ======================================================================
267 * A very simple elf loader, assumes the image is valid, returns the
268 * entry point address.
269 * ====================================================================== */
270 unsigned long load_elf_image (unsigned long addr)
272 Elf32_Ehdr *ehdr; /* Elf header structure pointer */
273 Elf32_Shdr *shdr; /* Section header structure pointer */
274 unsigned char *strtab = 0; /* String table pointer */
275 unsigned char *image; /* Binary image pointer */
276 int i; /* Loop counter */
278 /* -------------------------------------------------- */
280 ehdr = (Elf32_Ehdr *) addr;
282 /* Find the section header string table for output info */
283 shdr = (Elf32_Shdr *) (addr + ehdr->e_shoff +
284 (ehdr->e_shstrndx * sizeof (Elf32_Shdr)));
286 if (shdr->sh_type == SHT_STRTAB)
287 strtab = (unsigned char *) (addr + shdr->sh_offset);
289 /* Load each appropriate section */
290 for (i = 0; i < ehdr->e_shnum; ++i) {
291 shdr = (Elf32_Shdr *) (addr + ehdr->e_shoff +
292 (i * sizeof (Elf32_Shdr)));
294 if (!(shdr->sh_flags & SHF_ALLOC)
295 || shdr->sh_addr == 0 || shdr->sh_size == 0) {
300 printf ("%sing %s @ 0x%08lx (%ld bytes)\n",
301 (shdr->sh_type == SHT_NOBITS) ?
303 &strtab[shdr->sh_name],
304 (unsigned long) shdr->sh_addr,
305 (long) shdr->sh_size);
308 if (shdr->sh_type == SHT_NOBITS) {
309 memset ((void *)shdr->sh_addr, 0, shdr->sh_size);
311 image = (unsigned char *) addr + shdr->sh_offset;
312 memcpy ((void *) shdr->sh_addr,
313 (const void *) image,
316 flush_cache (shdr->sh_addr, shdr->sh_size);
319 return ehdr->e_entry;
322 /* ====================================================================== */
324 bootelf, 2, 0, do_bootelf,
325 "bootelf - Boot from an ELF image in memory\n",
326 " [address] - load address of ELF image.\n"
330 bootvx, 2, 0, do_bootvx,
331 "bootvx - Boot vxWorks from an ELF image\n",
332 " [address] - load address of vxWorks ELF image.\n"