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 /* Allow ports to override the default behavior */
35 unsigned long do_bootelf_exec (ulong (*entry)(int, char *[]), int argc, char *argv[])
40 * QNX images require the data cache is disabled.
41 * Data cache is already flushed, so just turn it off.
43 int dcache = dcache_status ();
48 * pass address parameter as argv[0] (aka command name),
49 * and all remaining args
51 ret = entry (argc, argv);
59 /* ======================================================================
60 * Interpreter command to boot an arbitrary ELF image from memory.
61 * ====================================================================== */
62 int do_bootelf (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
64 unsigned long addr; /* Address of the ELF image */
65 unsigned long rc; /* Return value from user code */
67 /* -------------------------------------------------- */
73 addr = simple_strtoul (argv[1], NULL, 16);
75 if (!valid_elf_image (addr))
78 addr = load_elf_image (addr);
80 printf ("## Starting application at 0x%08lx ...\n", addr);
83 * pass address parameter as argv[0] (aka command name),
84 * and all remaining args
86 rc = do_bootelf_exec ((void *)addr, argc - 1, argv + 1);
90 printf ("## Application terminated, rc = 0x%lx\n", rc);
94 /* ======================================================================
95 * Interpreter command to boot VxWorks from a memory image. The image can
96 * be either an ELF image or a raw binary. Will attempt to setup the
97 * bootline and other parameters correctly.
98 * ====================================================================== */
99 int do_bootvx (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
101 unsigned long addr; /* Address of image */
102 unsigned long bootaddr; /* Address to put the bootline */
103 char *bootline; /* Text of the bootline */
104 char *tmp; /* Temporary char pointer */
106 #if defined(CONFIG_4xx) || defined(CONFIG_IOP480)
107 char build_buf[80]; /* Buffer for building the bootline */
109 /* -------------------------------------------------- */
112 * Check the loadaddr variable.
113 * If we don't know where the image is then we're done.
119 addr = simple_strtoul (argv[1], NULL, 16);
121 #if defined(CONFIG_CMD_NET)
122 /* Check to see if we need to tftp the image ourselves before starting */
124 if ((argc == 2) && (strcmp (argv[1], "tftp") == 0)) {
125 if (NetLoop (TFTP) <= 0)
127 printf ("Automatic boot of VxWorks image at address 0x%08lx ... \n", addr);
131 /* This should equate
132 * to NV_RAM_ADRS + NV_BOOT_OFFSET + NV_ENET_OFFSET
133 * from the VxWorks BSP header files.
134 * This will vary from board to board
137 #if defined(CONFIG_WALNUT)
138 tmp = (char *) CFG_NVRAM_BASE_ADDR + 0x500;
139 memcpy ((char *) tmp, (char *) &gd->bd->bi_enetaddr[3], 3);
140 #elif defined(CFG_VXWORKS_MAC_PTR)
141 tmp = (char *) CFG_VXWORKS_MAC_PTR;
142 memcpy ((char *) tmp, (char *) &gd->bd->bi_enetaddr[0], 6);
144 puts ("## Ethernet MAC address not copied to NV RAM\n");
148 * Use bootaddr to find the location in memory that VxWorks
149 * will look for the bootline string. The default value for
150 * PowerPC is LOCAL_MEM_LOCAL_ADRS + BOOT_LINE_OFFSET which
154 if ((tmp = getenv ("bootaddr")) == NULL)
157 bootaddr = simple_strtoul (tmp, NULL, 16);
160 * Check to see if the bootline is defined in the 'bootargs'
161 * parameter. If it is not defined, we may be able to
165 if ((bootline = getenv ("bootargs")) != NULL) {
166 memcpy ((void *) bootaddr, bootline, MAX(strlen(bootline), 255));
167 flush_cache (bootaddr, MAX(strlen(bootline), 255));
169 #if defined(CONFIG_4xx)
170 sprintf (build_buf, "ibmEmac(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));
186 #elif defined(CONFIG_IOP480)
187 sprintf (build_buf, "dc(0,0)");
189 if ((tmp = getenv ("hostname")) != NULL) {
190 sprintf (&build_buf[strlen (build_buf - 1)],
193 sprintf (&build_buf[strlen (build_buf - 1)],
197 if ((tmp = getenv ("ipaddr")) != NULL) {
198 sprintf (&build_buf[strlen (build_buf - 1)],
201 memcpy ((void *) bootaddr, build_buf, MAX(strlen(build_buf), 255));
202 flush_cache (bootaddr, MAX(strlen(build_buf), 255));
206 * I'm not sure what the device should be for other
207 * PPC flavors, the hostname and ipaddr should be ok
211 puts ("No bootargs defined\n");
217 * If the data at the load address is an elf image, then
218 * treat it like an elf image. Otherwise, assume that it is a
222 if (valid_elf_image (addr)) {
223 addr = load_elf_image (addr);
225 puts ("## Not an ELF image, assuming binary\n");
226 /* leave addr as load_addr */
229 printf ("## Using bootline (@ 0x%lx): %s\n", bootaddr,
231 printf ("## Starting vxWorks at 0x%08lx ...\n", addr);
233 ((void (*)(void)) addr) ();
235 puts ("## vxWorks terminated\n");
239 /* ======================================================================
240 * Determine if a valid ELF image exists at the given memory location.
241 * First looks at the ELF header magic field, the makes sure that it is
242 * executable and makes sure that it is for a PowerPC.
243 * ====================================================================== */
244 int valid_elf_image (unsigned long addr)
246 Elf32_Ehdr *ehdr; /* Elf header structure pointer */
248 /* -------------------------------------------------- */
250 ehdr = (Elf32_Ehdr *) addr;
252 if (!IS_ELF (*ehdr)) {
253 printf ("## No elf image at address 0x%08lx\n", addr);
257 if (ehdr->e_type != ET_EXEC) {
258 printf ("## Not a 32-bit elf image at address 0x%08lx\n",
264 if (ehdr->e_machine != EM_PPC) {
265 printf ("## Not a PowerPC elf image at address 0x%08lx\n",
275 /* ======================================================================
276 * A very simple elf loader, assumes the image is valid, returns the
277 * entry point address.
278 * ====================================================================== */
279 unsigned long load_elf_image (unsigned long addr)
281 Elf32_Ehdr *ehdr; /* Elf header structure pointer */
282 Elf32_Shdr *shdr; /* Section header structure pointer */
283 unsigned char *strtab = 0; /* String table pointer */
284 unsigned char *image; /* Binary image pointer */
285 int i; /* Loop counter */
287 /* -------------------------------------------------- */
289 ehdr = (Elf32_Ehdr *) addr;
291 /* Find the section header string table for output info */
292 shdr = (Elf32_Shdr *) (addr + ehdr->e_shoff +
293 (ehdr->e_shstrndx * sizeof (Elf32_Shdr)));
295 if (shdr->sh_type == SHT_STRTAB)
296 strtab = (unsigned char *) (addr + shdr->sh_offset);
298 /* Load each appropriate section */
299 for (i = 0; i < ehdr->e_shnum; ++i) {
300 shdr = (Elf32_Shdr *) (addr + ehdr->e_shoff +
301 (i * sizeof (Elf32_Shdr)));
303 if (!(shdr->sh_flags & SHF_ALLOC)
304 || shdr->sh_addr == 0 || shdr->sh_size == 0) {
309 printf ("%sing %s @ 0x%08lx (%ld bytes)\n",
310 (shdr->sh_type == SHT_NOBITS) ?
312 &strtab[shdr->sh_name],
313 (unsigned long) shdr->sh_addr,
314 (long) shdr->sh_size);
317 if (shdr->sh_type == SHT_NOBITS) {
318 memset ((void *)shdr->sh_addr, 0, shdr->sh_size);
320 image = (unsigned char *) addr + shdr->sh_offset;
321 memcpy ((void *) shdr->sh_addr,
322 (const void *) image,
325 flush_cache (shdr->sh_addr, shdr->sh_size);
328 return ehdr->e_entry;
331 /* ====================================================================== */
333 bootelf, 2, 0, do_bootelf,
334 "bootelf - Boot from an ELF image in memory\n",
335 " [address] - load address of ELF image.\n"
339 bootvx, 2, 0, do_bootvx,
340 "bootvx - Boot vxWorks from an ELF image\n",
341 " [address] - load address of vxWorks ELF image.\n"