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458ded34 WD |
1 | /* |
2 | * Copyright (c) 2001 William L. Pitts | |
3 | * All rights reserved. | |
4 | * | |
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 | |
8 | * such forms. | |
9 | * | |
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 | |
13 | * purpose. | |
14 | */ | |
15 | ||
16 | #include <common.h> | |
17 | #include <command.h> | |
18 | #include <linux/ctype.h> | |
19 | #include <net.h> | |
458ded34 | 20 | #include <elf.h> |
29a4c24d | 21 | #include <vxworks.h> |
458ded34 | 22 | |
6d0f6bcf | 23 | #if defined(CONFIG_WALNUT) || defined(CONFIG_SYS_VXWORKS_MAC_PTR) |
d87080b7 WD |
24 | DECLARE_GLOBAL_DATA_PTR; |
25 | #endif | |
458ded34 | 26 | |
017e9b79 | 27 | int valid_elf_image (unsigned long addr); |
f44a928e MF |
28 | static unsigned long load_elf_image_phdr(unsigned long addr); |
29 | static unsigned long load_elf_image_shdr(unsigned long addr); | |
017e9b79 MF |
30 | |
31 | /* Allow ports to override the default behavior */ | |
32 | __attribute__((weak)) | |
54841ab5 WD |
33 | unsigned long do_bootelf_exec (ulong (*entry)(int, char * const[]), |
34 | int argc, char * const argv[]) | |
1f1d88dd | 35 | { |
017e9b79 MF |
36 | unsigned long ret; |
37 | ||
1f1d88dd MF |
38 | /* |
39 | * QNX images require the data cache is disabled. | |
40 | * Data cache is already flushed, so just turn it off. | |
41 | */ | |
017e9b79 MF |
42 | int dcache = dcache_status (); |
43 | if (dcache) | |
1f1d88dd MF |
44 | dcache_disable (); |
45 | ||
017e9b79 MF |
46 | /* |
47 | * pass address parameter as argv[0] (aka command name), | |
48 | * and all remaining args | |
49 | */ | |
50 | ret = entry (argc, argv); | |
1f1d88dd | 51 | |
017e9b79 MF |
52 | if (dcache) |
53 | dcache_enable (); | |
54 | ||
55 | return ret; | |
56 | } | |
458ded34 WD |
57 | |
58 | /* ====================================================================== | |
59 | * Interpreter command to boot an arbitrary ELF image from memory. | |
60 | * ====================================================================== */ | |
54841ab5 | 61 | int do_bootelf (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) |
458ded34 WD |
62 | { |
63 | unsigned long addr; /* Address of the ELF image */ | |
64 | unsigned long rc; /* Return value from user code */ | |
f44a928e | 65 | char *sload, *saddr; |
458ded34 WD |
66 | |
67 | /* -------------------------------------------------- */ | |
68 | int rcode = 0; | |
69 | ||
f44a928e MF |
70 | sload = saddr = NULL; |
71 | if (argc == 3) { | |
72 | sload = argv[1]; | |
73 | saddr = argv[2]; | |
74 | } else if (argc == 2) { | |
75 | if (argv[1][0] == '-') | |
76 | sload = argv[1]; | |
77 | else | |
78 | saddr = argv[1]; | |
79 | } | |
80 | ||
81 | if (saddr) | |
82 | addr = simple_strtoul(saddr, NULL, 16); | |
458ded34 | 83 | else |
f44a928e | 84 | addr = load_addr; |
458ded34 WD |
85 | |
86 | if (!valid_elf_image (addr)) | |
87 | return 1; | |
88 | ||
f44a928e MF |
89 | if (sload && sload[1] == 'p') |
90 | addr = load_elf_image_phdr(addr); | |
91 | else | |
92 | addr = load_elf_image_shdr(addr); | |
458ded34 WD |
93 | |
94 | printf ("## Starting application at 0x%08lx ...\n", addr); | |
95 | ||
458ded34 WD |
96 | /* |
97 | * pass address parameter as argv[0] (aka command name), | |
98 | * and all remaining args | |
99 | */ | |
017e9b79 | 100 | rc = do_bootelf_exec ((void *)addr, argc - 1, argv + 1); |
458ded34 WD |
101 | if (rc != 0) |
102 | rcode = 1; | |
103 | ||
104 | printf ("## Application terminated, rc = 0x%lx\n", rc); | |
105 | return rcode; | |
106 | } | |
107 | ||
108 | /* ====================================================================== | |
109 | * Interpreter command to boot VxWorks from a memory image. The image can | |
110 | * be either an ELF image or a raw binary. Will attempt to setup the | |
111 | * bootline and other parameters correctly. | |
112 | * ====================================================================== */ | |
54841ab5 | 113 | int do_bootvx (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) |
458ded34 | 114 | { |
458ded34 WD |
115 | unsigned long addr; /* Address of image */ |
116 | unsigned long bootaddr; /* Address to put the bootline */ | |
117 | char *bootline; /* Text of the bootline */ | |
118 | char *tmp; /* Temporary char pointer */ | |
29a4c24d | 119 | char build_buf[128]; /* Buffer for building the bootline */ |
458ded34 | 120 | |
29a4c24d NG |
121 | /* --------------------------------------------------- |
122 | * | |
458ded34 WD |
123 | * Check the loadaddr variable. |
124 | * If we don't know where the image is then we're done. | |
125 | */ | |
126 | ||
1bdd4683 SR |
127 | if (argc < 2) |
128 | addr = load_addr; | |
129 | else | |
130 | addr = simple_strtoul (argv[1], NULL, 16); | |
458ded34 | 131 | |
baa26db4 | 132 | #if defined(CONFIG_CMD_NET) |
458ded34 WD |
133 | /* Check to see if we need to tftp the image ourselves before starting */ |
134 | ||
135 | if ((argc == 2) && (strcmp (argv[1], "tftp") == 0)) { | |
e4bf0c5c | 136 | if (NetLoop(TFTPGET) <= 0) |
458ded34 | 137 | return 1; |
e4bf0c5c SG |
138 | printf("Automatic boot of VxWorks image at address 0x%08lx " |
139 | "...\n", addr); | |
458ded34 WD |
140 | } |
141 | #endif | |
142 | ||
143 | /* This should equate | |
144 | * to NV_RAM_ADRS + NV_BOOT_OFFSET + NV_ENET_OFFSET | |
145 | * from the VxWorks BSP header files. | |
146 | * This will vary from board to board | |
147 | */ | |
148 | ||
c157d8e2 | 149 | #if defined(CONFIG_WALNUT) |
6d0f6bcf | 150 | tmp = (char *) CONFIG_SYS_NVRAM_BASE_ADDR + 0x500; |
76756e41 | 151 | eth_getenv_enetaddr("ethaddr", (uchar *)build_buf); |
62c93d92 | 152 | memcpy(tmp, &build_buf[3], 3); |
6d0f6bcf JCPV |
153 | #elif defined(CONFIG_SYS_VXWORKS_MAC_PTR) |
154 | tmp = (char *) CONFIG_SYS_VXWORKS_MAC_PTR; | |
76756e41 | 155 | eth_getenv_enetaddr("ethaddr", (uchar *)build_buf); |
62c93d92 | 156 | memcpy(tmp, build_buf, 6); |
458ded34 | 157 | #else |
4b9206ed | 158 | puts ("## Ethernet MAC address not copied to NV RAM\n"); |
458ded34 WD |
159 | #endif |
160 | ||
8bde7f77 WD |
161 | /* |
162 | * Use bootaddr to find the location in memory that VxWorks | |
163 | * will look for the bootline string. The default value for | |
164 | * PowerPC is LOCAL_MEM_LOCAL_ADRS + BOOT_LINE_OFFSET which | |
165 | * defaults to 0x4200 | |
458ded34 WD |
166 | */ |
167 | ||
168 | if ((tmp = getenv ("bootaddr")) == NULL) | |
29a4c24d | 169 | bootaddr = CONFIG_SYS_VXWORKS_BOOT_ADDR; |
458ded34 WD |
170 | else |
171 | bootaddr = simple_strtoul (tmp, NULL, 16); | |
172 | ||
8bde7f77 WD |
173 | /* |
174 | * Check to see if the bootline is defined in the 'bootargs' | |
175 | * parameter. If it is not defined, we may be able to | |
176 | * construct the info | |
458ded34 WD |
177 | */ |
178 | ||
179 | if ((bootline = getenv ("bootargs")) != NULL) { | |
29a4c24d NG |
180 | memcpy ((void *) bootaddr, bootline, |
181 | max (strlen (bootline), 255)); | |
182 | flush_cache (bootaddr, max (strlen (bootline), 255)); | |
458ded34 | 183 | } else { |
458ded34 | 184 | |
29a4c24d NG |
185 | |
186 | sprintf (build_buf, CONFIG_SYS_VXWORKS_BOOT_DEVICE); | |
187 | if ((tmp = getenv ("bootfile")) != NULL) { | |
188 | sprintf (&build_buf[strlen (build_buf)], | |
189 | "%s:%s ", CONFIG_SYS_VXWORKS_SERVERNAME, tmp); | |
458ded34 | 190 | } else { |
29a4c24d NG |
191 | sprintf (&build_buf[strlen (build_buf)], |
192 | "%s:file ", CONFIG_SYS_VXWORKS_SERVERNAME); | |
458ded34 WD |
193 | } |
194 | ||
195 | if ((tmp = getenv ("ipaddr")) != NULL) { | |
29a4c24d | 196 | sprintf (&build_buf[strlen (build_buf)], "e=%s ", tmp); |
458ded34 | 197 | } |
458ded34 | 198 | |
29a4c24d NG |
199 | if ((tmp = getenv ("serverip")) != NULL) { |
200 | sprintf (&build_buf[strlen (build_buf)], "h=%s ", tmp); | |
458ded34 WD |
201 | } |
202 | ||
29a4c24d NG |
203 | if ((tmp = getenv ("hostname")) != NULL) { |
204 | sprintf (&build_buf[strlen (build_buf)], "tn=%s ", tmp); | |
458ded34 | 205 | } |
29a4c24d NG |
206 | #ifdef CONFIG_SYS_VXWORKS_ADD_PARAMS |
207 | sprintf (&build_buf[strlen (build_buf)], | |
208 | CONFIG_SYS_VXWORKS_ADD_PARAMS); | |
458ded34 | 209 | #endif |
29a4c24d NG |
210 | |
211 | memcpy ((void *) bootaddr, build_buf, | |
212 | max (strlen (build_buf), 255)); | |
213 | flush_cache (bootaddr, max (strlen (build_buf), 255)); | |
458ded34 WD |
214 | } |
215 | ||
8bde7f77 WD |
216 | /* |
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 | |
219 | * binary image | |
458ded34 WD |
220 | */ |
221 | ||
222 | if (valid_elf_image (addr)) { | |
f44a928e | 223 | addr = load_elf_image_shdr (addr); |
458ded34 | 224 | } else { |
4b9206ed | 225 | puts ("## Not an ELF image, assuming binary\n"); |
458ded34 WD |
226 | /* leave addr as load_addr */ |
227 | } | |
228 | ||
229 | printf ("## Using bootline (@ 0x%lx): %s\n", bootaddr, | |
230 | (char *) bootaddr); | |
231 | printf ("## Starting vxWorks at 0x%08lx ...\n", addr); | |
232 | ||
233 | ((void (*)(void)) addr) (); | |
234 | ||
4b9206ed | 235 | puts ("## vxWorks terminated\n"); |
458ded34 WD |
236 | return 1; |
237 | } | |
238 | ||
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) | |
245 | { | |
246 | Elf32_Ehdr *ehdr; /* Elf header structure pointer */ | |
247 | ||
248 | /* -------------------------------------------------- */ | |
249 | ||
250 | ehdr = (Elf32_Ehdr *) addr; | |
251 | ||
252 | if (!IS_ELF (*ehdr)) { | |
253 | printf ("## No elf image at address 0x%08lx\n", addr); | |
254 | return 0; | |
255 | } | |
256 | ||
257 | if (ehdr->e_type != ET_EXEC) { | |
29a4c24d | 258 | printf ("## Not a 32-bit elf image at address 0x%08lx\n", addr); |
458ded34 WD |
259 | return 0; |
260 | } | |
261 | ||
6069ff26 | 262 | #if 0 |
458ded34 WD |
263 | if (ehdr->e_machine != EM_PPC) { |
264 | printf ("## Not a PowerPC elf image at address 0x%08lx\n", | |
265 | addr); | |
266 | return 0; | |
267 | } | |
6069ff26 | 268 | #endif |
458ded34 WD |
269 | |
270 | return 1; | |
271 | } | |
272 | ||
458ded34 WD |
273 | /* ====================================================================== |
274 | * A very simple elf loader, assumes the image is valid, returns the | |
275 | * entry point address. | |
276 | * ====================================================================== */ | |
f44a928e MF |
277 | static unsigned long load_elf_image_phdr(unsigned long addr) |
278 | { | |
279 | Elf32_Ehdr *ehdr; /* Elf header structure pointer */ | |
280 | Elf32_Phdr *phdr; /* Program header structure pointer */ | |
281 | int i; | |
282 | ||
283 | ehdr = (Elf32_Ehdr *) addr; | |
284 | phdr = (Elf32_Phdr *) (addr + ehdr->e_phoff); | |
285 | ||
286 | /* Load each program header */ | |
287 | for (i = 0; i < ehdr->e_phnum; ++i) { | |
288 | void *dst = (void *) phdr->p_paddr; | |
289 | void *src = (void *) addr + phdr->p_offset; | |
290 | debug("Loading phdr %i to 0x%p (%i bytes)\n", | |
291 | i, dst, phdr->p_filesz); | |
292 | if (phdr->p_filesz) | |
293 | memcpy(dst, src, phdr->p_filesz); | |
294 | if (phdr->p_filesz != phdr->p_memsz) | |
295 | memset(dst + phdr->p_filesz, 0x00, phdr->p_memsz - phdr->p_filesz); | |
296 | flush_cache((unsigned long)dst, phdr->p_filesz); | |
297 | ++phdr; | |
298 | } | |
299 | ||
300 | return ehdr->e_entry; | |
301 | } | |
302 | ||
303 | static unsigned long load_elf_image_shdr(unsigned long addr) | |
458ded34 WD |
304 | { |
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 */ | |
310 | ||
311 | /* -------------------------------------------------- */ | |
312 | ||
313 | ehdr = (Elf32_Ehdr *) addr; | |
314 | ||
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))); | |
318 | ||
319 | if (shdr->sh_type == SHT_STRTAB) | |
320 | strtab = (unsigned char *) (addr + shdr->sh_offset); | |
321 | ||
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))); | |
326 | ||
327 | if (!(shdr->sh_flags & SHF_ALLOC) | |
328 | || shdr->sh_addr == 0 || shdr->sh_size == 0) { | |
329 | continue; | |
330 | } | |
331 | ||
332 | if (strtab) { | |
3c972849 | 333 | debug("%sing %s @ 0x%08lx (%ld bytes)\n", |
458ded34 WD |
334 | (shdr->sh_type == SHT_NOBITS) ? |
335 | "Clear" : "Load", | |
336 | &strtab[shdr->sh_name], | |
337 | (unsigned long) shdr->sh_addr, | |
338 | (long) shdr->sh_size); | |
339 | } | |
340 | ||
341 | if (shdr->sh_type == SHT_NOBITS) { | |
342 | memset ((void *)shdr->sh_addr, 0, shdr->sh_size); | |
343 | } else { | |
344 | image = (unsigned char *) addr + shdr->sh_offset; | |
345 | memcpy ((void *) shdr->sh_addr, | |
346 | (const void *) image, | |
347 | shdr->sh_size); | |
348 | } | |
349 | flush_cache (shdr->sh_addr, shdr->sh_size); | |
350 | } | |
351 | ||
352 | return ehdr->e_entry; | |
353 | } | |
354 | ||
355 | /* ====================================================================== */ | |
0d498393 | 356 | U_BOOT_CMD( |
f44a928e | 357 | bootelf, 3, 0, do_bootelf, |
2fb2604d | 358 | "Boot from an ELF image in memory", |
f44a928e MF |
359 | "[-p|-s] [address]\n" |
360 | "\t- load ELF image at [address] via program headers (-p)\n" | |
361 | "\t or via section headers (-s)" | |
8bde7f77 WD |
362 | ); |
363 | ||
0d498393 WD |
364 | U_BOOT_CMD( |
365 | bootvx, 2, 0, do_bootvx, | |
2fb2604d | 366 | "Boot vxWorks from an ELF image", |
a89c33db | 367 | " [address] - load address of vxWorks ELF image." |
8bde7f77 | 368 | ); |