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wdenk458ded32002-09-20 10:59:08 +00001/*
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>
wdenk458ded32002-09-20 10:59:08 +000020#include <elf.h>
21
Wolfgang Denkd87080b2006-03-31 18:32:53 +020022#if defined(CONFIG_WALNUT) || defined(CFG_VXWORKS_MAC_PTR)
23DECLARE_GLOBAL_DATA_PTR;
24#endif
wdenk458ded32002-09-20 10:59:08 +000025
wdenk458ded32002-09-20 10:59:08 +000026#ifndef MAX
27#define MAX(a,b) ((a) > (b) ? (a) : (b))
28#endif
29
Mike Frysinger017e9b72008-04-13 19:42:18 -040030int valid_elf_image (unsigned long addr);
31unsigned long load_elf_image (unsigned long addr);
32
33/* Allow ports to override the default behavior */
34__attribute__((weak))
35unsigned long do_bootelf_exec (ulong (*entry)(int, char *[]), int argc, char *argv[])
Mike Frysinger1f1d88d2008-01-29 18:21:05 -050036{
Mike Frysinger017e9b72008-04-13 19:42:18 -040037 unsigned long ret;
38
Mike Frysinger1f1d88d2008-01-29 18:21:05 -050039 /*
40 * QNX images require the data cache is disabled.
41 * Data cache is already flushed, so just turn it off.
42 */
Mike Frysinger017e9b72008-04-13 19:42:18 -040043 int dcache = dcache_status ();
44 if (dcache)
Mike Frysinger1f1d88d2008-01-29 18:21:05 -050045 dcache_disable ();
46
Mike Frysinger017e9b72008-04-13 19:42:18 -040047 /*
48 * pass address parameter as argv[0] (aka command name),
49 * and all remaining args
50 */
51 ret = entry (argc, argv);
Mike Frysinger1f1d88d2008-01-29 18:21:05 -050052
Mike Frysinger017e9b72008-04-13 19:42:18 -040053 if (dcache)
54 dcache_enable ();
55
56 return ret;
57}
wdenk458ded32002-09-20 10:59:08 +000058
59/* ======================================================================
60 * Interpreter command to boot an arbitrary ELF image from memory.
61 * ====================================================================== */
62int do_bootelf (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
63{
64 unsigned long addr; /* Address of the ELF image */
65 unsigned long rc; /* Return value from user code */
66
67 /* -------------------------------------------------- */
68 int rcode = 0;
69
70 if (argc < 2)
71 addr = load_addr;
72 else
73 addr = simple_strtoul (argv[1], NULL, 16);
74
75 if (!valid_elf_image (addr))
76 return 1;
77
78 addr = load_elf_image (addr);
79
80 printf ("## Starting application at 0x%08lx ...\n", addr);
81
wdenk458ded32002-09-20 10:59:08 +000082 /*
83 * pass address parameter as argv[0] (aka command name),
84 * and all remaining args
85 */
Mike Frysinger017e9b72008-04-13 19:42:18 -040086 rc = do_bootelf_exec ((void *)addr, argc - 1, argv + 1);
wdenk458ded32002-09-20 10:59:08 +000087 if (rc != 0)
88 rcode = 1;
89
90 printf ("## Application terminated, rc = 0x%lx\n", rc);
91 return rcode;
92}
93
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 * ====================================================================== */
Stefan Roese1bdd4682006-11-29 12:53:15 +010099int do_bootvx (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
wdenk458ded32002-09-20 10:59:08 +0000100{
wdenk458ded32002-09-20 10:59:08 +0000101 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 */
105
106#if defined(CONFIG_4xx) || defined(CONFIG_IOP480)
107 char build_buf[80]; /* Buffer for building the bootline */
108#endif
109 /* -------------------------------------------------- */
110
111 /*
112 * Check the loadaddr variable.
113 * If we don't know where the image is then we're done.
114 */
115
Stefan Roese1bdd4682006-11-29 12:53:15 +0100116 if (argc < 2)
117 addr = load_addr;
118 else
119 addr = simple_strtoul (argv[1], NULL, 16);
wdenk458ded32002-09-20 10:59:08 +0000120
Jon Loeligerbaa26db2007-07-08 17:51:39 -0500121#if defined(CONFIG_CMD_NET)
wdenk458ded32002-09-20 10:59:08 +0000122 /* Check to see if we need to tftp the image ourselves before starting */
123
124 if ((argc == 2) && (strcmp (argv[1], "tftp") == 0)) {
wdenkeb9401e2002-11-11 02:11:37 +0000125 if (NetLoop (TFTP) <= 0)
wdenk458ded32002-09-20 10:59:08 +0000126 return 1;
127 printf ("Automatic boot of VxWorks image at address 0x%08lx ... \n", addr);
128 }
129#endif
130
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
135 */
136
Stefan Roesec157d8e2005-08-01 16:41:48 +0200137#if defined(CONFIG_WALNUT)
wdenk458ded32002-09-20 10:59:08 +0000138 tmp = (char *) CFG_NVRAM_BASE_ADDR + 0x500;
139 memcpy ((char *) tmp, (char *) &gd->bd->bi_enetaddr[3], 3);
stroese1cdf5d92004-12-16 17:37:54 +0000140#elif defined(CFG_VXWORKS_MAC_PTR)
141 tmp = (char *) CFG_VXWORKS_MAC_PTR;
wdenk458ded32002-09-20 10:59:08 +0000142 memcpy ((char *) tmp, (char *) &gd->bd->bi_enetaddr[0], 6);
143#else
wdenk4b9206e2004-03-23 22:14:11 +0000144 puts ("## Ethernet MAC address not copied to NV RAM\n");
wdenk458ded32002-09-20 10:59:08 +0000145#endif
146
wdenk8bde7f72003-06-27 21:31:46 +0000147 /*
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
151 * defaults to 0x4200
wdenk458ded32002-09-20 10:59:08 +0000152 */
153
154 if ((tmp = getenv ("bootaddr")) == NULL)
155 bootaddr = 0x4200;
156 else
157 bootaddr = simple_strtoul (tmp, NULL, 16);
158
wdenk8bde7f72003-06-27 21:31:46 +0000159 /*
160 * Check to see if the bootline is defined in the 'bootargs'
161 * parameter. If it is not defined, we may be able to
162 * construct the info
wdenk458ded32002-09-20 10:59:08 +0000163 */
164
165 if ((bootline = getenv ("bootargs")) != NULL) {
166 memcpy ((void *) bootaddr, bootline, MAX(strlen(bootline), 255));
167 flush_cache (bootaddr, MAX(strlen(bootline), 255));
168 } else {
169#if defined(CONFIG_4xx)
170 sprintf (build_buf, "ibmEmac(0,0)");
171
172 if ((tmp = getenv ("hostname")) != NULL) {
173 sprintf (&build_buf[strlen (build_buf - 1)],
174 "host:%s ", tmp);
175 } else {
176 sprintf (&build_buf[strlen (build_buf - 1)],
177 ": ");
178 }
179
180 if ((tmp = getenv ("ipaddr")) != NULL) {
181 sprintf (&build_buf[strlen (build_buf - 1)],
182 "e=%s ", tmp);
183 }
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)");
188
189 if ((tmp = getenv ("hostname")) != NULL) {
190 sprintf (&build_buf[strlen (build_buf - 1)],
191 "host:%s ", tmp);
192 } else {
193 sprintf (&build_buf[strlen (build_buf - 1)],
194 ": ");
195 }
196
197 if ((tmp = getenv ("ipaddr")) != NULL) {
198 sprintf (&build_buf[strlen (build_buf - 1)],
199 "e=%s ", tmp);
200 }
201 memcpy ((void *) bootaddr, build_buf, MAX(strlen(build_buf), 255));
202 flush_cache (bootaddr, MAX(strlen(build_buf), 255));
203#else
204
wdenk8bde7f72003-06-27 21:31:46 +0000205 /*
206 * I'm not sure what the device should be for other
207 * PPC flavors, the hostname and ipaddr should be ok
208 * to just copy
wdenk458ded32002-09-20 10:59:08 +0000209 */
210
wdenk4b9206e2004-03-23 22:14:11 +0000211 puts ("No bootargs defined\n");
wdenk458ded32002-09-20 10:59:08 +0000212 return 1;
213#endif
214 }
215
wdenk8bde7f72003-06-27 21:31:46 +0000216 /*
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
wdenk458ded32002-09-20 10:59:08 +0000220 */
221
222 if (valid_elf_image (addr)) {
223 addr = load_elf_image (addr);
224 } else {
wdenk4b9206e2004-03-23 22:14:11 +0000225 puts ("## Not an ELF image, assuming binary\n");
wdenk458ded32002-09-20 10:59:08 +0000226 /* 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
wdenk4b9206e2004-03-23 22:14:11 +0000235 puts ("## vxWorks terminated\n");
wdenk458ded32002-09-20 10:59:08 +0000236 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 * ====================================================================== */
244int 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) {
258 printf ("## Not a 32-bit elf image at address 0x%08lx\n",
259 addr);
260 return 0;
261 }
262
wdenk6069ff22003-02-28 00:49:47 +0000263#if 0
wdenk458ded32002-09-20 10:59:08 +0000264 if (ehdr->e_machine != EM_PPC) {
265 printf ("## Not a PowerPC elf image at address 0x%08lx\n",
266 addr);
267 return 0;
268 }
wdenk6069ff22003-02-28 00:49:47 +0000269#endif
wdenk458ded32002-09-20 10:59:08 +0000270
271 return 1;
272}
273
274
275/* ======================================================================
276 * A very simple elf loader, assumes the image is valid, returns the
277 * entry point address.
278 * ====================================================================== */
279unsigned long load_elf_image (unsigned long addr)
280{
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 */
286
287 /* -------------------------------------------------- */
288
289 ehdr = (Elf32_Ehdr *) addr;
290
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)));
294
295 if (shdr->sh_type == SHT_STRTAB)
296 strtab = (unsigned char *) (addr + shdr->sh_offset);
297
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)));
302
303 if (!(shdr->sh_flags & SHF_ALLOC)
304 || shdr->sh_addr == 0 || shdr->sh_size == 0) {
305 continue;
306 }
307
308 if (strtab) {
309 printf ("%sing %s @ 0x%08lx (%ld bytes)\n",
310 (shdr->sh_type == SHT_NOBITS) ?
311 "Clear" : "Load",
312 &strtab[shdr->sh_name],
313 (unsigned long) shdr->sh_addr,
314 (long) shdr->sh_size);
315 }
316
317 if (shdr->sh_type == SHT_NOBITS) {
318 memset ((void *)shdr->sh_addr, 0, shdr->sh_size);
319 } else {
320 image = (unsigned char *) addr + shdr->sh_offset;
321 memcpy ((void *) shdr->sh_addr,
322 (const void *) image,
323 shdr->sh_size);
324 }
325 flush_cache (shdr->sh_addr, shdr->sh_size);
326 }
327
328 return ehdr->e_entry;
329}
330
331/* ====================================================================== */
wdenk0d498392003-07-01 21:06:45 +0000332U_BOOT_CMD(
333 bootelf, 2, 0, do_bootelf,
wdenk8bde7f72003-06-27 21:31:46 +0000334 "bootelf - Boot from an ELF image in memory\n",
335 " [address] - load address of ELF image.\n"
336);
337
wdenk0d498392003-07-01 21:06:45 +0000338U_BOOT_CMD(
339 bootvx, 2, 0, do_bootvx,
wdenk8bde7f72003-06-27 21:31:46 +0000340 "bootvx - Boot vxWorks from an ELF image\n",
341 " [address] - load address of vxWorks ELF image.\n"
342);