[J-u-boot.git] / common / cmd_elf.c

/*
 * Copyright (c) 2001 William L. Pitts
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are freely
 * permitted provided that the above copyright notice and this
 * paragraph and the following disclaimer are duplicated in all
 * such forms.
 *
 * This software is provided "AS IS" and without any express or
 * implied warranties, including, without limitation, the implied
 * warranties of merchantability and fitness for a particular
 * purpose.
 */

#include <common.h>
#include <command.h>
#include <linux/ctype.h>
#include <net.h>

#include <cmd_elf.h>
#include <elf.h>


#if (CONFIG_COMMANDS & CFG_CMD_ELF)

#ifndef MAX
#define MAX(a,b) ((a) > (b) ? (a) : (b))
#endif


/* ======================================================================
 * Interpreter command to boot an arbitrary ELF image from memory.
 * ====================================================================== */
int do_bootelf (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
	unsigned long addr;		/* Address of the ELF image     */
	unsigned long rc;		/* Return value from user code  */

	/* -------------------------------------------------- */
	int rcode = 0;

	if (argc < 2)
		addr = load_addr;
	else
		addr = simple_strtoul (argv[1], NULL, 16);

	if (!valid_elf_image (addr))
		return 1;

	addr = load_elf_image (addr);

	printf ("## Starting application at 0x%08lx ...\n", addr);

	/*
	 * QNX images require the data cache is disabled.
	 * Data cache is already flushed, so just turn it off.
	 */
	if (dcache_status ())
		dcache_disable ();

	/*
	 * pass address parameter as argv[0] (aka command name),
	 * and all remaining args
	 */
	rc = ((ulong (*)(int, char *[])) addr) (--argc, &argv[1]);
	if (rc != 0)
		rcode = 1;

	printf ("## Application terminated, rc = 0x%lx\n", rc);
	return rcode;
}

/* ======================================================================
 * Interpreter command to boot VxWorks from a memory image.  The image can
 * be either an ELF image or a raw binary.  Will attempt to setup the
 * bootline and other parameters correctly.
 * ====================================================================== */
int do_bootvx ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
#if defined(CONFIG_WALNUT405)	|| \
    defined(CONFIG_CPCI405)	|| \
    defined(CONFIG_OCRTC)	|| \
    defined(CONFIG_ORSG)
	DECLARE_GLOBAL_DATA_PTR;
#endif

	unsigned long addr;		/* Address of image            */
	unsigned long bootaddr;		/* Address to put the bootline */
	char *bootline;			/* Text of the bootline        */
	char *tmp;			/* Temporary char pointer      */

#if defined(CONFIG_4xx) || defined(CONFIG_IOP480)
	char build_buf[80];		/* Buffer for building the bootline */
#endif
	/* -------------------------------------------------- */

	/*
	 * Check the loadaddr variable.
	 * If we don't know where the image is then we're done.
	 */

	if ((tmp = getenv ("loadaddr")) != NULL) {
		addr = simple_strtoul (tmp, NULL, 16);
	} else {
		printf ("No load address provided\n");
		return 1;
	}

#if (CONFIG_COMMANDS & CFG_CMD_NET)
	/* Check to see if we need to tftp the image ourselves before starting */

	if ((argc == 2) && (strcmp (argv[1], "tftp") == 0)) {
		if (NetLoop (TFTP) <= 0)
			return 1;
		printf ("Automatic boot of VxWorks image at address 0x%08lx ... \n", addr);
	}
#endif

	/* This should equate
	 * to NV_RAM_ADRS + NV_BOOT_OFFSET + NV_ENET_OFFSET
	 * from the VxWorks BSP header files.
	 * This will vary from board to board
	 */

#if defined(CONFIG_WALNUT405)
	tmp = (char *) CFG_NVRAM_BASE_ADDR + 0x500;
	memcpy ((char *) tmp, (char *) &gd->bd->bi_enetaddr[3], 3);
#elif defined(CONFIG_CPCI405)
	tmp = (char *) CFG_NVRAM_BASE_ADDR + CFG_NVRAM_VXWORKS_OFFS;
	memcpy ((char *) tmp, (char *) &gd->bd->bi_enetaddr[0], 6);
#elif defined(CONFIG_OCRTC) || defined(CONFIG_ORSG)
	tmp = (char *) CFG_ETHERNET_MAC_ADDR;
	memcpy ((char *) tmp, (char *) &gd->bd->bi_enetaddr[0], 6);
#else
	printf ("## Ethernet MAC address not copied to NV RAM\n");
#endif

        /*
         * Use bootaddr to find the location in memory that VxWorks
         * will look for the bootline string. The default value for
         * PowerPC is LOCAL_MEM_LOCAL_ADRS + BOOT_LINE_OFFSET which
         * defaults to 0x4200
	 */

	if ((tmp = getenv ("bootaddr")) == NULL)
		bootaddr = 0x4200;
	else
		bootaddr = simple_strtoul (tmp, NULL, 16);

        /*
         * Check to see if the bootline is defined in the 'bootargs'
         * parameter. If it is not defined, we may be able to
         * construct the info
	 */

	if ((bootline = getenv ("bootargs")) != NULL) {
		memcpy ((void *) bootaddr, bootline, MAX(strlen(bootline), 255));
		flush_cache (bootaddr, MAX(strlen(bootline), 255));
	} else {
#if defined(CONFIG_4xx)
		sprintf (build_buf, "ibmEmac(0,0)");

		if ((tmp = getenv ("hostname")) != NULL) {
			sprintf (&build_buf[strlen (build_buf - 1)],
				"host:%s ", tmp);
		} else {
			sprintf (&build_buf[strlen (build_buf - 1)],
				": ");
		}

		if ((tmp = getenv ("ipaddr")) != NULL) {
			sprintf (&build_buf[strlen (build_buf - 1)],
				"e=%s ", tmp);
		}
		memcpy ((void *)bootaddr, build_buf, MAX(strlen(build_buf), 255));
		flush_cache (bootaddr, MAX(strlen(build_buf), 255));
#elif defined(CONFIG_IOP480)
		sprintf (build_buf, "dc(0,0)");

		if ((tmp = getenv ("hostname")) != NULL) {
			sprintf (&build_buf[strlen (build_buf - 1)],
				"host:%s ", tmp);
		} else {
			sprintf (&build_buf[strlen (build_buf - 1)],
				": ");
		}

		if ((tmp = getenv ("ipaddr")) != NULL) {
			sprintf (&build_buf[strlen (build_buf - 1)],
				"e=%s ", tmp);
		}
		memcpy ((void *) bootaddr, build_buf, MAX(strlen(build_buf), 255));
		flush_cache (bootaddr, MAX(strlen(build_buf), 255));
#else

                /*
                 * I'm not sure what the device should be for other
                 * PPC flavors, the hostname and ipaddr should be ok
                 * to just copy
		 */

		printf ("No bootargs defined\n");
		return 1;
#endif
	}

        /*
         * If the data at the load address is an elf image, then
         * treat it like an elf image. Otherwise, assume that it is a
         * binary image
	 */

	if (valid_elf_image (addr)) {
		addr = load_elf_image (addr);
	} else {
		printf ("## Not an ELF image, assuming binary\n");
		/* leave addr as load_addr */
	}

	printf ("## Using bootline (@ 0x%lx): %s\n", bootaddr,
			(char *) bootaddr);
	printf ("## Starting vxWorks at 0x%08lx ...\n", addr);

	((void (*)(void)) addr) ();

	printf ("## vxWorks terminated\n");
	return 1;
}

/* ======================================================================
 * Determine if a valid ELF image exists at the given memory location.
 * First looks at the ELF header magic field, the makes sure that it is
 * executable and makes sure that it is for a PowerPC.
 * ====================================================================== */
int valid_elf_image (unsigned long addr)
{
	Elf32_Ehdr *ehdr;		/* Elf header structure pointer */

	/* -------------------------------------------------- */

	ehdr = (Elf32_Ehdr *) addr;

	if (!IS_ELF (*ehdr)) {
		printf ("## No elf image at address 0x%08lx\n", addr);
		return 0;
	}

	if (ehdr->e_type != ET_EXEC) {
		printf ("## Not a 32-bit elf image at address 0x%08lx\n",
			addr);
		return 0;
	}

	if (ehdr->e_machine != EM_PPC) {
		printf ("## Not a PowerPC elf image at address 0x%08lx\n",
			addr);
		return 0;
	}

	return 1;
}


/* ======================================================================
 * A very simple elf loader, assumes the image is valid, returns the
 * entry point address.
 * ====================================================================== */
unsigned long load_elf_image (unsigned long addr)
{
	Elf32_Ehdr *ehdr;		/* Elf header structure pointer     */
	Elf32_Shdr *shdr;		/* Section header structure pointer */
	unsigned char *strtab = 0;	/* String table pointer             */
	unsigned char *image;		/* Binary image pointer             */
	int i;				/* Loop counter                     */

	/* -------------------------------------------------- */

	ehdr = (Elf32_Ehdr *) addr;

	/* Find the section header string table for output info */
	shdr = (Elf32_Shdr *) (addr + ehdr->e_shoff +
			       (ehdr->e_shstrndx * sizeof (Elf32_Shdr)));

	if (shdr->sh_type == SHT_STRTAB)
		strtab = (unsigned char *) (addr + shdr->sh_offset);

	/* Load each appropriate section */
	for (i = 0; i < ehdr->e_shnum; ++i) {
		shdr = (Elf32_Shdr *) (addr + ehdr->e_shoff +
				       (i * sizeof (Elf32_Shdr)));

		if (!(shdr->sh_flags & SHF_ALLOC)
		   || shdr->sh_addr == 0 || shdr->sh_size == 0) {
			continue;
		}

		if (strtab) {
			printf ("%sing %s @ 0x%08lx (%ld bytes)\n",
				(shdr->sh_type == SHT_NOBITS) ?
					"Clear" : "Load",
				&strtab[shdr->sh_name],
				(unsigned long) shdr->sh_addr,
				(long) shdr->sh_size);
		}

		if (shdr->sh_type == SHT_NOBITS) {
			memset ((void *)shdr->sh_addr, 0, shdr->sh_size);
		} else {
			image = (unsigned char *) addr + shdr->sh_offset;
			memcpy ((void *) shdr->sh_addr,
				(const void *) image,
				shdr->sh_size);
		}
		flush_cache (shdr->sh_addr, shdr->sh_size);
	}

	return ehdr->e_entry;
}

/* ====================================================================== */
#endif	/* CFG_CMD_ELF */
Commit	Line	Data
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>
	20
	21	#include <cmd_elf.h>
	22	#include <elf.h>
	23
	24
	25	#if (CONFIG_COMMANDS & CFG_CMD_ELF)
	26
	27	#ifndef MAX
	28	#define MAX(a,b) ((a) > (b) ? (a) : (b))
	29	#endif
	30
	31
	32	/* ======================================================================
	33	* Interpreter command to boot an arbitrary ELF image from memory.
	34	* ====================================================================== */
	35	int do_bootelf (cmd_tbl_t cmdtp, int flag, int argc, char argv[])
	36	{
	37	unsigned long addr; /* Address of the ELF image */
	38	unsigned long rc; /* Return value from user code */
	39
	40	/* -------------------------------------------------- */
	41	int rcode = 0;
	42
	43	if (argc < 2)
	44	addr = load_addr;
	45	else
	46	addr = simple_strtoul (argv[1], NULL, 16);
	47
	48	if (!valid_elf_image (addr))
	49	return 1;
	50
	51	addr = load_elf_image (addr);
	52
	53	printf ("## Starting application at 0x%08lx ...\n", addr);
	54
	55	/*
	56	* QNX images require the data cache is disabled.
	57	* Data cache is already flushed, so just turn it off.
	58	*/
	59	if (dcache_status ())
	60	dcache_disable ();
	61
	62	/*
	63	* pass address parameter as argv[0] (aka command name),
	64	* and all remaining args
65	*/
66	rc = ((ulong ()(int, char [])) addr) (--argc, &argv[1]);
67	if (rc != 0)
68	rcode = 1;
69
70	printf ("## Application terminated, rc = 0x%lx\n", rc);
71	return rcode;
72	}
73
74	/* ======================================================================
75	* Interpreter command to boot VxWorks from a memory image. The image can
76	* be either an ELF image or a raw binary. Will attempt to setup the
77	* bootline and other parameters correctly.
78	* ====================================================================== */
79	int do_bootvx ( cmd_tbl_t cmdtp, int flag, int argc, char argv[])
80	{
81	#if defined(CONFIG_WALNUT405) \|\| \
82	defined(CONFIG_CPCI405) \|\| \
83	defined(CONFIG_OCRTC) \|\| \
84	defined(CONFIG_ORSG)
85	DECLARE_GLOBAL_DATA_PTR;
86	#endif
87
88	unsigned long addr; /* Address of image */
89	unsigned long bootaddr; /* Address to put the bootline */
90	char bootline; / Text of the bootline */
91	char tmp; / Temporary char pointer */
92
93	#if defined(CONFIG_4xx) \|\| defined(CONFIG_IOP480)
94	char build_buf[80]; /* Buffer for building the bootline */
95	#endif
96	/* -------------------------------------------------- */
97
98	/*
99	* Check the loadaddr variable.
100	* If we don't know where the image is then we're done.
101	*/
102
103	if ((tmp = getenv ("loadaddr")) != NULL) {
104	addr = simple_strtoul (tmp, NULL, 16);
105	} else {
106	printf ("No load address provided\n");
107	return 1;
108	}
109
110	#if (CONFIG_COMMANDS & CFG_CMD_NET)
111	/* Check to see if we need to tftp the image ourselves before starting */
112
113	if ((argc == 2) && (strcmp (argv[1], "tftp") == 0)) {
eb9401e3	114	if (NetLoop (TFTP) <= 0)
458ded34 WD	115	return 1;
	116	printf ("Automatic boot of VxWorks image at address 0x%08lx ... \n", addr);
	117	}
	118	#endif
	119
	120	/* This should equate
	121	* to NV_RAM_ADRS + NV_BOOT_OFFSET + NV_ENET_OFFSET
	122	* from the VxWorks BSP header files.
	123	* This will vary from board to board
	124	*/
	125
	126	#if defined(CONFIG_WALNUT405)
	127	tmp = (char *) CFG_NVRAM_BASE_ADDR + 0x500;
	128	memcpy ((char ) tmp, (char ) &gd->bd->bi_enetaddr[3], 3);
	129	#elif defined(CONFIG_CPCI405)
	130	tmp = (char *) CFG_NVRAM_BASE_ADDR + CFG_NVRAM_VXWORKS_OFFS;
	131	memcpy ((char ) tmp, (char ) &gd->bd->bi_enetaddr[0], 6);
	132	#elif defined(CONFIG_OCRTC) \|\| defined(CONFIG_ORSG)
	133	tmp = (char *) CFG_ETHERNET_MAC_ADDR;
	134	memcpy ((char ) tmp, (char ) &gd->bd->bi_enetaddr[0], 6);
	135	#else
	136	printf ("## Ethernet MAC address not copied to NV RAM\n");
	137	#endif
	138
	139	/*
	140	* Use bootaddr to find the location in memory that VxWorks
	141	* will look for the bootline string. The default value for
	142	* PowerPC is LOCAL_MEM_LOCAL_ADRS + BOOT_LINE_OFFSET which
	143	* defaults to 0x4200
	144	*/
	145
	146	if ((tmp = getenv ("bootaddr")) == NULL)
	147	bootaddr = 0x4200;
	148	else
	149	bootaddr = simple_strtoul (tmp, NULL, 16);
	150
	151	/*
	152	* Check to see if the bootline is defined in the 'bootargs'
	153	* parameter. If it is not defined, we may be able to
	154	* construct the info
	155	*/
	156
	157	if ((bootline = getenv ("bootargs")) != NULL) {
	158	memcpy ((void *) bootaddr, bootline, MAX(strlen(bootline), 255));
	159	flush_cache (bootaddr, MAX(strlen(bootline), 255));
	160	} else {
	161	#if defined(CONFIG_4xx)
	162	sprintf (build_buf, "ibmEmac(0,0)");
	163
	164	if ((tmp = getenv ("hostname")) != NULL) {
	165	sprintf (&build_buf[strlen (build_buf - 1)],
	166	"host:%s ", tmp);
	167	} else {
	168	sprintf (&build_buf[strlen (build_buf - 1)],
	169	": ");
	170	}
	171
	172	if ((tmp = getenv ("ipaddr")) != NULL) {
	173	sprintf (&build_buf[strlen (build_buf - 1)],
	174	"e=%s ", tmp);
	175	}
	176	memcpy ((void *)bootaddr, build_buf, MAX(strlen(build_buf), 255));
	177	flush_cache (bootaddr, MAX(strlen(build_buf), 255));
	178	#elif defined(CONFIG_IOP480)
179	sprintf (build_buf, "dc(0,0)");
180
181	if ((tmp = getenv ("hostname")) != NULL) {
182	sprintf (&build_buf[strlen (build_buf - 1)],
183	"host:%s ", tmp);
184	} else {
185	sprintf (&build_buf[strlen (build_buf - 1)],
186	": ");
187	}
188
189	if ((tmp = getenv ("ipaddr")) != NULL) {
190	sprintf (&build_buf[strlen (build_buf - 1)],
191	"e=%s ", tmp);
192	}
193	memcpy ((void *) bootaddr, build_buf, MAX(strlen(build_buf), 255));
194	flush_cache (bootaddr, MAX(strlen(build_buf), 255));
195	#else
196
197	/*
198	* I'm not sure what the device should be for other
199	* PPC flavors, the hostname and ipaddr should be ok
200	* to just copy
201	*/
202
203	printf ("No bootargs defined\n");
204	return 1;
205	#endif
206	}
207
208	/*
209	* If the data at the load address is an elf image, then
210	* treat it like an elf image. Otherwise, assume that it is a
211	* binary image
212	*/
213
214	if (valid_elf_image (addr)) {
215	addr = load_elf_image (addr);
216	} else {
217	printf ("## Not an ELF image, assuming binary\n");
218	/* leave addr as load_addr */
219	}
220
221	printf ("## Using bootline (@ 0x%lx): %s\n", bootaddr,
222	(char *) bootaddr);
223	printf ("## Starting vxWorks at 0x%08lx ...\n", addr);
224
225	((void (*)(void)) addr) ();
226
227	printf ("## vxWorks terminated\n");
228	return 1;
229	}
230
231	/* ======================================================================
232	* Determine if a valid ELF image exists at the given memory location.
233	* First looks at the ELF header magic field, the makes sure that it is
234	* executable and makes sure that it is for a PowerPC.
235	* ====================================================================== */
236	int valid_elf_image (unsigned long addr)
237	{
238	Elf32_Ehdr ehdr; / Elf header structure pointer */
239
240	/* -------------------------------------------------- */
241
242	ehdr = (Elf32_Ehdr *) addr;
243
244	if (!IS_ELF (*ehdr)) {
245	printf ("## No elf image at address 0x%08lx\n", addr);
246	return 0;
247	}
248
249	if (ehdr->e_type != ET_EXEC) {
250	printf ("## Not a 32-bit elf image at address 0x%08lx\n",
251	addr);
252	return 0;
253	}
254
255	if (ehdr->e_machine != EM_PPC) {
256	printf ("## Not a PowerPC elf image at address 0x%08lx\n",
257	addr);
258	return 0;
259	}
260
261	return 1;
262	}
263
264
265	/* ======================================================================
266	* A very simple elf loader, assumes the image is valid, returns the
267	* entry point address.
268	* ====================================================================== */
269	unsigned long load_elf_image (unsigned long addr)
270	{
271	Elf32_Ehdr ehdr; / Elf header structure pointer */
272	Elf32_Shdr shdr; / Section header structure pointer */
273	unsigned char strtab = 0; / String table pointer */
274	unsigned char image; / Binary image pointer */
275	int i; /* Loop counter */
276
277	/* -------------------------------------------------- */
278
279	ehdr = (Elf32_Ehdr *) addr;
280
281	/* Find the section header string table for output info */
282	shdr = (Elf32_Shdr *) (addr + ehdr->e_shoff +
283	(ehdr->e_shstrndx * sizeof (Elf32_Shdr)));
284
285	if (shdr->sh_type == SHT_STRTAB)
286	strtab = (unsigned char *) (addr + shdr->sh_offset);
287
288	/* Load each appropriate section */
289	for (i = 0; i < ehdr->e_shnum; ++i) {
290	shdr = (Elf32_Shdr *) (addr + ehdr->e_shoff +
291	(i * sizeof (Elf32_Shdr)));
292
293	if (!(shdr->sh_flags & SHF_ALLOC)
294	\|\| shdr->sh_addr == 0 \|\| shdr->sh_size == 0) {
295	continue;
296	}
297
298	if (strtab) {
299	printf ("%sing %s @ 0x%08lx (%ld bytes)\n",
300	(shdr->sh_type == SHT_NOBITS) ?
301	"Clear" : "Load",
302	&strtab[shdr->sh_name],
303	(unsigned long) shdr->sh_addr,
304	(long) shdr->sh_size);
305	}
306
307	if (shdr->sh_type == SHT_NOBITS) {
308	memset ((void *)shdr->sh_addr, 0, shdr->sh_size);
309	} else {
310	image = (unsigned char *) addr + shdr->sh_offset;
311	memcpy ((void *) shdr->sh_addr,
312	(const void *) image,
313	shdr->sh_size);
314	}
315	flush_cache (shdr->sh_addr, shdr->sh_size);
316	}
317
318	return ehdr->e_entry;
319	}
320
321	/* ====================================================================== */
322	#endif /* CFG_CMD_ELF */