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"