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>
23 #if defined(CONFIG_WALNUT) || defined(CONFIG_SYS_VXWORKS_MAC_PTR)
24 DECLARE_GLOBAL_DATA_PTR;
27 static unsigned long load_elf_image_phdr(unsigned long addr);
28 static unsigned long load_elf_image_shdr(unsigned long addr);
30 /* Allow ports to override the default behavior */
32 unsigned long do_bootelf_exec(ulong (*entry)(int, char * const[]),
33 int argc, char * const argv[])
38 * QNX images require the data cache is disabled.
39 * Data cache is already flushed, so just turn it off.
41 int dcache = dcache_status();
46 * pass address parameter as argv[0] (aka command name),
47 * and all remaining args
49 ret = entry(argc, argv);
57 /* ======================================================================
58 * Determine if a valid ELF image exists at the given memory location.
59 * First looks at the ELF header magic field, the makes sure that it is
60 * executable and makes sure that it is for a PowerPC.
61 * ====================================================================== */
62 int valid_elf_image(unsigned long addr)
64 Elf32_Ehdr *ehdr; /* Elf header structure pointer */
66 /* -------------------------------------------------- */
68 ehdr = (Elf32_Ehdr *) addr;
71 printf("## No elf image at address 0x%08lx\n", addr);
75 if (ehdr->e_type != ET_EXEC) {
76 printf("## Not a 32-bit elf image at address 0x%08lx\n", addr);
81 if (ehdr->e_machine != EM_PPC) {
82 printf("## Not a PowerPC elf image at address 0x%08lx\n", addr);
90 /* ======================================================================
91 * Interpreter command to boot an arbitrary ELF image from memory.
92 * ====================================================================== */
93 int do_bootelf(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
95 unsigned long addr; /* Address of the ELF image */
96 unsigned long rc; /* Return value from user code */
99 /* -------------------------------------------------- */
102 sload = saddr = NULL;
106 } else if (argc == 2) {
107 if (argv[1][0] == '-')
114 addr = simple_strtoul(saddr, NULL, 16);
118 if (!valid_elf_image(addr))
121 if (sload && sload[1] == 'p')
122 addr = load_elf_image_phdr(addr);
124 addr = load_elf_image_shdr(addr);
126 printf("## Starting application at 0x%08lx ...\n", addr);
129 * pass address parameter as argv[0] (aka command name),
130 * and all remaining args
132 rc = do_bootelf_exec((void *)addr, argc - 1, argv + 1);
136 printf("## Application terminated, rc = 0x%lx\n", rc);
140 /* ======================================================================
141 * Interpreter command to boot VxWorks from a memory image. The image can
142 * be either an ELF image or a raw binary. Will attempt to setup the
143 * bootline and other parameters correctly.
144 * ====================================================================== */
145 int do_bootvx(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
147 unsigned long addr; /* Address of image */
148 unsigned long bootaddr; /* Address to put the bootline */
149 char *bootline; /* Text of the bootline */
150 char *tmp; /* Temporary char pointer */
151 char build_buf[128]; /* Buffer for building the bootline */
153 /* ---------------------------------------------------
155 * Check the loadaddr variable.
156 * If we don't know where the image is then we're done.
162 addr = simple_strtoul(argv[0], NULL, 16);
164 #if defined(CONFIG_CMD_NET)
166 * Check to see if we need to tftp the image ourselves before starting
168 if ((argc == 1) && (strcmp(argv[0], "tftp") == 0)) {
169 if (NetLoop(TFTPGET) <= 0)
171 printf("Automatic boot of VxWorks image at address 0x%08lx ...\n",
176 /* This should equate
177 * to NV_RAM_ADRS + NV_BOOT_OFFSET + NV_ENET_OFFSET
178 * from the VxWorks BSP header files.
179 * This will vary from board to board
182 #if defined(CONFIG_WALNUT)
183 tmp = (char *) CONFIG_SYS_NVRAM_BASE_ADDR + 0x500;
184 eth_getenv_enetaddr("ethaddr", (uchar *)build_buf);
185 memcpy(tmp, &build_buf[3], 3);
186 #elif defined(CONFIG_SYS_VXWORKS_MAC_PTR)
187 tmp = (char *) CONFIG_SYS_VXWORKS_MAC_PTR;
188 eth_getenv_enetaddr("ethaddr", (uchar *)build_buf);
189 memcpy(tmp, build_buf, 6);
191 puts("## Ethernet MAC address not copied to NV RAM\n");
195 * Use bootaddr to find the location in memory that VxWorks
196 * will look for the bootline string. The default value for
197 * PowerPC is LOCAL_MEM_LOCAL_ADRS + BOOT_LINE_OFFSET which
200 tmp = getenv("bootaddr");
202 bootaddr = CONFIG_SYS_VXWORKS_BOOT_ADDR;
204 bootaddr = simple_strtoul(tmp, NULL, 16);
207 * Check to see if the bootline is defined in the 'bootargs'
208 * parameter. If it is not defined, we may be able to
211 bootline = getenv("bootargs");
213 memcpy((void *) bootaddr, bootline,
214 max(strlen(bootline), 255));
215 flush_cache(bootaddr, max(strlen(bootline), 255));
217 sprintf(build_buf, CONFIG_SYS_VXWORKS_BOOT_DEVICE);
218 tmp = getenv("bootfile");
220 sprintf(&build_buf[strlen(build_buf)],
221 "%s:%s ", CONFIG_SYS_VXWORKS_SERVERNAME, tmp);
223 sprintf(&build_buf[strlen(build_buf)],
224 "%s:file ", CONFIG_SYS_VXWORKS_SERVERNAME);
226 tmp = getenv("ipaddr");
228 sprintf(&build_buf[strlen(build_buf)], "e=%s ", tmp);
230 tmp = getenv("serverip");
232 sprintf(&build_buf[strlen(build_buf)], "h=%s ", tmp);
234 tmp = getenv("hostname");
236 sprintf(&build_buf[strlen(build_buf)], "tn=%s ", tmp);
238 #ifdef CONFIG_SYS_VXWORKS_ADD_PARAMS
239 sprintf(&build_buf[strlen(build_buf)],
240 CONFIG_SYS_VXWORKS_ADD_PARAMS);
243 memcpy((void *) bootaddr, build_buf,
244 max(strlen(build_buf), 255));
245 flush_cache(bootaddr, max(strlen(build_buf), 255));
249 * If the data at the load address is an elf image, then
250 * treat it like an elf image. Otherwise, assume that it is a
254 if (valid_elf_image(addr)) {
255 addr = load_elf_image_shdr(addr);
257 puts("## Not an ELF image, assuming binary\n");
258 /* leave addr as load_addr */
261 printf("## Using bootline (@ 0x%lx): %s\n", bootaddr,
263 printf("## Starting vxWorks at 0x%08lx ...\n", addr);
266 ((void (*)(int)) addr) (0);
268 puts("## vxWorks terminated\n");
272 /* ======================================================================
273 * A very simple elf loader, assumes the image is valid, returns the
274 * entry point address.
275 * ====================================================================== */
276 static unsigned long load_elf_image_phdr(unsigned long addr)
278 Elf32_Ehdr *ehdr; /* Elf header structure pointer */
279 Elf32_Phdr *phdr; /* Program header structure pointer */
282 ehdr = (Elf32_Ehdr *) addr;
283 phdr = (Elf32_Phdr *) (addr + ehdr->e_phoff);
285 /* Load each program header */
286 for (i = 0; i < ehdr->e_phnum; ++i) {
287 void *dst = (void *)(uintptr_t) phdr->p_paddr;
288 void *src = (void *) addr + phdr->p_offset;
289 debug("Loading phdr %i to 0x%p (%i bytes)\n",
290 i, dst, phdr->p_filesz);
292 memcpy(dst, src, phdr->p_filesz);
293 if (phdr->p_filesz != phdr->p_memsz)
294 memset(dst + phdr->p_filesz, 0x00,
295 phdr->p_memsz - phdr->p_filesz);
296 flush_cache((unsigned long)dst, phdr->p_filesz);
300 return ehdr->e_entry;
303 static unsigned long load_elf_image_shdr(unsigned long addr)
305 Elf32_Ehdr *ehdr; /* Elf header structure pointer */
306 Elf32_Shdr *shdr; /* Section header structure pointer */
307 unsigned char *strtab = 0; /* String table pointer */
308 unsigned char *image; /* Binary image pointer */
309 int i; /* Loop counter */
311 /* -------------------------------------------------- */
313 ehdr = (Elf32_Ehdr *) addr;
315 /* Find the section header string table for output info */
316 shdr = (Elf32_Shdr *) (addr + ehdr->e_shoff +
317 (ehdr->e_shstrndx * sizeof(Elf32_Shdr)));
319 if (shdr->sh_type == SHT_STRTAB)
320 strtab = (unsigned char *) (addr + shdr->sh_offset);
322 /* Load each appropriate section */
323 for (i = 0; i < ehdr->e_shnum; ++i) {
324 shdr = (Elf32_Shdr *) (addr + ehdr->e_shoff +
325 (i * sizeof(Elf32_Shdr)));
327 if (!(shdr->sh_flags & SHF_ALLOC)
328 || shdr->sh_addr == 0 || shdr->sh_size == 0) {
333 debug("%sing %s @ 0x%08lx (%ld bytes)\n",
334 (shdr->sh_type == SHT_NOBITS) ?
336 &strtab[shdr->sh_name],
337 (unsigned long) shdr->sh_addr,
338 (long) shdr->sh_size);
341 if (shdr->sh_type == SHT_NOBITS) {
342 memset((void *)(uintptr_t) shdr->sh_addr, 0,
345 image = (unsigned char *) addr + shdr->sh_offset;
346 memcpy((void *)(uintptr_t) shdr->sh_addr,
347 (const void *) image,
350 flush_cache(shdr->sh_addr, shdr->sh_size);
353 return ehdr->e_entry;
356 /* ====================================================================== */
358 bootelf, 3, 0, do_bootelf,
359 "Boot from an ELF image in memory",
360 "[-p|-s] [address]\n"
361 "\t- load ELF image at [address] via program headers (-p)\n"
362 "\t or via section headers (-s)"
366 bootvx, 2, 0, do_bootvx,
367 "Boot vxWorks from an ELF image",
368 " [address] - load address of vxWorks ELF image."