[people/ms/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 <elf.h>

#if defined(CONFIG_WALNUT) || defined(CFG_VXWORKS_MAC_PTR)
DECLARE_GLOBAL_DATA_PTR;
#endif

#if (CONFIG_COMMANDS & CFG_CMD_ELF)

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

int valid_elf_image (unsigned long addr);
unsigned long load_elf_image (unsigned long addr);

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

#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_WALNUT)
	tmp = (char *) CFG_NVRAM_BASE_ADDR + 0x500;
	memcpy ((char *) tmp, (char *) &gd->bd->bi_enetaddr[3], 3);
#elif defined(CFG_VXWORKS_MAC_PTR)
	tmp = (char *) CFG_VXWORKS_MAC_PTR;
	memcpy ((char *) tmp, (char *) &gd->bd->bi_enetaddr[0], 6);
#else
	puts ("## 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
		 */

		puts ("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 {
		puts ("## 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) ();

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

	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;
}

/* ====================================================================== */
U_BOOT_CMD(
	bootelf,      2,      0,      do_bootelf,
	"bootelf - Boot from an ELF image in memory\n",
	" [address] - load address of ELF image.\n"
);

U_BOOT_CMD(
	bootvx,      2,      0,      do_bootvx,
	"bootvx  - Boot vxWorks from an ELF image\n",
	" [address] - load address of vxWorks ELF image.\n"
);

#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>
458ded34 WD	20	#include <elf.h>
458ded34 WD	21
d87080b7 WD	22	#if defined(CONFIG_WALNUT) \|\| defined(CFG_VXWORKS_MAC_PTR)
	23	DECLARE_GLOBAL_DATA_PTR;
	24	#endif
458ded34 WD	25
	26	#if (CONFIG_COMMANDS & CFG_CMD_ELF)
	27
	28	#ifndef MAX
	29	#define MAX(a,b) ((a) > (b) ? (a) : (b))
	30	#endif
	31
8bde7f77 WD	32	int valid_elf_image (unsigned long addr);
8bde7f77 WD	33	unsigned long load_elf_image (unsigned long addr);
458ded34 WD	34
	35	/* ======================================================================
	36	* Interpreter command to boot an arbitrary ELF image from memory.
	37	* ====================================================================== */
	38	int do_bootelf (cmd_tbl_t cmdtp, int flag, int argc, char argv[])
	39	{
	40	unsigned long addr; /* Address of the ELF image */
	41	unsigned long rc; /* Return value from user code */
	42
	43	/* -------------------------------------------------- */
	44	int rcode = 0;
	45
	46	if (argc < 2)
	47	addr = load_addr;
	48	else
	49	addr = simple_strtoul (argv[1], NULL, 16);
	50
	51	if (!valid_elf_image (addr))
	52	return 1;
	53
	54	addr = load_elf_image (addr);
	55
	56	printf ("## Starting application at 0x%08lx ...\n", addr);
	57
	58	/*
	59	* QNX images require the data cache is disabled.
	60	* Data cache is already flushed, so just turn it off.
	61	*/
	62	if (dcache_status ())
	63	dcache_disable ();
	64
	65	/*
	66	* pass address parameter as argv[0] (aka command name),
	67	* and all remaining args
	68	*/
	69	rc = ((ulong ()(int, char [])) addr) (--argc, &argv[1]);
	70	if (rc != 0)
	71	rcode = 1;
	72
	73	printf ("## Application terminated, rc = 0x%lx\n", rc);
	74	return rcode;
	75	}
	76
	77	/* ======================================================================
	78	* Interpreter command to boot VxWorks from a memory image. The image can
	79	* be either an ELF image or a raw binary. Will attempt to setup the
	80	* bootline and other parameters correctly.
	81	* ====================================================================== */
1bdd4683	82	int do_bootvx (cmd_tbl_t cmdtp, int flag, int argc, char argv[])
458ded34	83	{
458ded34 WD	84	unsigned long addr; /* Address of image */
	85	unsigned long bootaddr; /* Address to put the bootline */
	86	char bootline; / Text of the bootline */
	87	char tmp; / Temporary char pointer */
	88
	89	#if defined(CONFIG_4xx) \|\| defined(CONFIG_IOP480)
	90	char build_buf[80]; /* Buffer for building the bootline */
	91	#endif
	92	/* -------------------------------------------------- */
	93
	94	/*
	95	* Check the loadaddr variable.
	96	* If we don't know where the image is then we're done.
	97	*/
	98
1bdd4683 SR	99	if (argc < 2)
	100	addr = load_addr;
	101	else
	102	addr = simple_strtoul (argv[1], NULL, 16);
458ded34 WD	103
	104	#if (CONFIG_COMMANDS & CFG_CMD_NET)
	105	/* Check to see if we need to tftp the image ourselves before starting */
	106
	107	if ((argc == 2) && (strcmp (argv[1], "tftp") == 0)) {
eb9401e3	108	if (NetLoop (TFTP) <= 0)
458ded34 WD	109	return 1;
	110	printf ("Automatic boot of VxWorks image at address 0x%08lx ... \n", addr);
	111	}
	112	#endif
	113
	114	/* This should equate
	115	* to NV_RAM_ADRS + NV_BOOT_OFFSET + NV_ENET_OFFSET
	116	* from the VxWorks BSP header files.
	117	* This will vary from board to board
	118	*/
	119
c157d8e2	120	#if defined(CONFIG_WALNUT)
458ded34 WD	121	tmp = (char *) CFG_NVRAM_BASE_ADDR + 0x500;
458ded34 WD	122	memcpy ((char ) tmp, (char ) &gd->bd->bi_enetaddr[3], 3);
1cdf5d92 SR	123	#elif defined(CFG_VXWORKS_MAC_PTR)
1cdf5d92 SR	124	tmp = (char *) CFG_VXWORKS_MAC_PTR;
458ded34 WD	125	memcpy ((char ) tmp, (char ) &gd->bd->bi_enetaddr[0], 6);
458ded34 WD	126	#else
4b9206ed	127	puts ("## Ethernet MAC address not copied to NV RAM\n");
458ded34 WD	128	#endif
458ded34 WD	129
8bde7f77 WD	130	/*
	131	* Use bootaddr to find the location in memory that VxWorks
	132	* will look for the bootline string. The default value for
	133	* PowerPC is LOCAL_MEM_LOCAL_ADRS + BOOT_LINE_OFFSET which
	134	* defaults to 0x4200
458ded34 WD	135	*/
	136
	137	if ((tmp = getenv ("bootaddr")) == NULL)
	138	bootaddr = 0x4200;
	139	else
	140	bootaddr = simple_strtoul (tmp, NULL, 16);
	141
8bde7f77 WD	142	/*
	143	* Check to see if the bootline is defined in the 'bootargs'
	144	* parameter. If it is not defined, we may be able to
	145	* construct the info
458ded34 WD	146	*/
	147
	148	if ((bootline = getenv ("bootargs")) != NULL) {
	149	memcpy ((void *) bootaddr, bootline, MAX(strlen(bootline), 255));
	150	flush_cache (bootaddr, MAX(strlen(bootline), 255));
	151	} else {
	152	#if defined(CONFIG_4xx)
	153	sprintf (build_buf, "ibmEmac(0,0)");
	154
	155	if ((tmp = getenv ("hostname")) != NULL) {
	156	sprintf (&build_buf[strlen (build_buf - 1)],
	157	"host:%s ", tmp);
	158	} else {
	159	sprintf (&build_buf[strlen (build_buf - 1)],
	160	": ");
	161	}
	162
	163	if ((tmp = getenv ("ipaddr")) != NULL) {
	164	sprintf (&build_buf[strlen (build_buf - 1)],
	165	"e=%s ", tmp);
	166	}
	167	memcpy ((void *)bootaddr, build_buf, MAX(strlen(build_buf), 255));
	168	flush_cache (bootaddr, MAX(strlen(build_buf), 255));
	169	#elif defined(CONFIG_IOP480)
	170	sprintf (build_buf, "dc(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	#else
	187
8bde7f77 WD	188	/*
	189	* I'm not sure what the device should be for other
	190	* PPC flavors, the hostname and ipaddr should be ok
	191	* to just copy
458ded34 WD	192	*/
458ded34 WD	193
4b9206ed	194	puts ("No bootargs defined\n");
458ded34 WD	195	return 1;
	196	#endif
	197	}
	198
8bde7f77 WD	199	/*
	200	* If the data at the load address is an elf image, then
	201	* treat it like an elf image. Otherwise, assume that it is a
	202	* binary image
458ded34 WD	203	*/
	204
	205	if (valid_elf_image (addr)) {
	206	addr = load_elf_image (addr);
	207	} else {
4b9206ed	208	puts ("## Not an ELF image, assuming binary\n");
458ded34 WD	209	/* leave addr as load_addr */
	210	}
	211
	212	printf ("## Using bootline (@ 0x%lx): %s\n", bootaddr,
	213	(char *) bootaddr);
	214	printf ("## Starting vxWorks at 0x%08lx ...\n", addr);
	215
	216	((void (*)(void)) addr) ();
	217
4b9206ed	218	puts ("## vxWorks terminated\n");
458ded34 WD	219	return 1;
	220	}
	221
	222	/* ======================================================================
	223	* Determine if a valid ELF image exists at the given memory location.
	224	* First looks at the ELF header magic field, the makes sure that it is
	225	* executable and makes sure that it is for a PowerPC.
	226	* ====================================================================== */
	227	int valid_elf_image (unsigned long addr)
	228	{
	229	Elf32_Ehdr ehdr; / Elf header structure pointer */
	230
	231	/* -------------------------------------------------- */
	232
	233	ehdr = (Elf32_Ehdr *) addr;
	234
	235	if (!IS_ELF (*ehdr)) {
	236	printf ("## No elf image at address 0x%08lx\n", addr);
	237	return 0;
	238	}
	239
	240	if (ehdr->e_type != ET_EXEC) {
	241	printf ("## Not a 32-bit elf image at address 0x%08lx\n",
	242	addr);
	243	return 0;
	244	}
	245
6069ff26	246	#if 0
458ded34 WD	247	if (ehdr->e_machine != EM_PPC) {
	248	printf ("## Not a PowerPC elf image at address 0x%08lx\n",
	249	addr);
	250	return 0;
	251	}
6069ff26	252	#endif
458ded34 WD	253
	254	return 1;
	255	}
	256
	257
	258	/* ======================================================================
	259	* A very simple elf loader, assumes the image is valid, returns the
	260	* entry point address.
	261	* ====================================================================== */
	262	unsigned long load_elf_image (unsigned long addr)
	263	{
	264	Elf32_Ehdr ehdr; / Elf header structure pointer */
	265	Elf32_Shdr shdr; / Section header structure pointer */
	266	unsigned char strtab = 0; / String table pointer */
	267	unsigned char image; / Binary image pointer */
	268	int i; /* Loop counter */
	269
	270	/* -------------------------------------------------- */
	271
	272	ehdr = (Elf32_Ehdr *) addr;
	273
	274	/* Find the section header string table for output info */
	275	shdr = (Elf32_Shdr *) (addr + ehdr->e_shoff +
	276	(ehdr->e_shstrndx * sizeof (Elf32_Shdr)));
	277
	278	if (shdr->sh_type == SHT_STRTAB)
	279	strtab = (unsigned char *) (addr + shdr->sh_offset);
	280
	281	/* Load each appropriate section */
	282	for (i = 0; i < ehdr->e_shnum; ++i) {
	283	shdr = (Elf32_Shdr *) (addr + ehdr->e_shoff +
	284	(i * sizeof (Elf32_Shdr)));
	285
	286	if (!(shdr->sh_flags & SHF_ALLOC)
	287	\|\| shdr->sh_addr == 0 \|\| shdr->sh_size == 0) {
	288	continue;
	289	}
	290
	291	if (strtab) {
	292	printf ("%sing %s @ 0x%08lx (%ld bytes)\n",
	293	(shdr->sh_type == SHT_NOBITS) ?
	294	"Clear" : "Load",
	295	&strtab[shdr->sh_name],
	296	(unsigned long) shdr->sh_addr,
	297	(long) shdr->sh_size);
	298	}
	299
	300	if (shdr->sh_type == SHT_NOBITS) {
	301	memset ((void *)shdr->sh_addr, 0, shdr->sh_size);
	302	} else {
	303	image = (unsigned char *) addr + shdr->sh_offset;
	304	memcpy ((void *) shdr->sh_addr,
	305	(const void *) image,
	306	shdr->sh_size);
	307	}
	308	flush_cache (shdr->sh_addr, shdr->sh_size);
	309	}
	310
	311	return ehdr->e_entry;
	312	}
	313
	314	/* ====================================================================== */
0d498393 WD	315	U_BOOT_CMD(
0d498393 WD	316	bootelf, 2, 0, do_bootelf,
8bde7f77 WD	317	"bootelf - Boot from an ELF image in memory\n",
	318	" [address] - load address of ELF image.\n"
	319	);
	320
0d498393 WD	321	U_BOOT_CMD(
0d498393 WD	322	bootvx, 2, 0, do_bootvx,
8bde7f77 WD	323	"bootvx - Boot vxWorks from an ELF image\n",
	324	" [address] - load address of vxWorks ELF image.\n"
	325	);
	326
458ded34	327	#endif /* CFG_CMD_ELF */