[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 <elf.h>

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

#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 defined(CONFIG_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"
);
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	25
458ded34 WD	26	#ifndef MAX
	27	#define MAX(a,b) ((a) > (b) ? (a) : (b))
	28	#endif
	29
8bde7f77 WD	30	int valid_elf_image (unsigned long addr);
8bde7f77 WD	31	unsigned long load_elf_image (unsigned long addr);
458ded34 WD	32
	33	/* ======================================================================
	34	* Interpreter command to boot an arbitrary ELF image from memory.
	35	* ====================================================================== */
	36	int do_bootelf (cmd_tbl_t cmdtp, int flag, int argc, char argv[])
	37	{
	38	unsigned long addr; /* Address of the ELF image */
	39	unsigned long rc; /* Return value from user code */
	40
	41	/* -------------------------------------------------- */
	42	int rcode = 0;
	43
	44	if (argc < 2)
	45	addr = load_addr;
	46	else
	47	addr = simple_strtoul (argv[1], NULL, 16);
	48
	49	if (!valid_elf_image (addr))
	50	return 1;
	51
	52	addr = load_elf_image (addr);
	53
	54	printf ("## Starting application at 0x%08lx ...\n", addr);
	55
	56	/*
	57	* QNX images require the data cache is disabled.
	58	* Data cache is already flushed, so just turn it off.
	59	*/
	60	if (dcache_status ())
	61	dcache_disable ();
	62
	63	/*
	64	* pass address parameter as argv[0] (aka command name),
	65	* and all remaining args
	66	*/
	67	rc = ((ulong ()(int, char [])) addr) (--argc, &argv[1]);
	68	if (rc != 0)
	69	rcode = 1;
	70
	71	printf ("## Application terminated, rc = 0x%lx\n", rc);
	72	return rcode;
	73	}
	74
	75	/* ======================================================================
	76	* Interpreter command to boot VxWorks from a memory image. The image can
	77	* be either an ELF image or a raw binary. Will attempt to setup the
	78	* bootline and other parameters correctly.
	79	* ====================================================================== */
1bdd4683	80	int do_bootvx (cmd_tbl_t cmdtp, int flag, int argc, char argv[])
458ded34	81	{
458ded34 WD	82	unsigned long addr; /* Address of image */
	83	unsigned long bootaddr; /* Address to put the bootline */
	84	char bootline; / Text of the bootline */
	85	char tmp; / Temporary char pointer */
	86
	87	#if defined(CONFIG_4xx) \|\| defined(CONFIG_IOP480)
	88	char build_buf[80]; /* Buffer for building the bootline */
	89	#endif
	90	/* -------------------------------------------------- */
	91
	92	/*
	93	* Check the loadaddr variable.
	94	* If we don't know where the image is then we're done.
	95	*/
	96
1bdd4683 SR	97	if (argc < 2)
	98	addr = load_addr;
	99	else
	100	addr = simple_strtoul (argv[1], NULL, 16);
458ded34	101
baa26db4	102	#if defined(CONFIG_CMD_NET)
458ded34 WD	103	/* Check to see if we need to tftp the image ourselves before starting */
	104
	105	if ((argc == 2) && (strcmp (argv[1], "tftp") == 0)) {
eb9401e3	106	if (NetLoop (TFTP) <= 0)
458ded34 WD	107	return 1;
	108	printf ("Automatic boot of VxWorks image at address 0x%08lx ... \n", addr);
	109	}
	110	#endif
	111
	112	/* This should equate
	113	* to NV_RAM_ADRS + NV_BOOT_OFFSET + NV_ENET_OFFSET
	114	* from the VxWorks BSP header files.
	115	* This will vary from board to board
	116	*/
	117
c157d8e2	118	#if defined(CONFIG_WALNUT)
458ded34 WD	119	tmp = (char *) CFG_NVRAM_BASE_ADDR + 0x500;
458ded34 WD	120	memcpy ((char ) tmp, (char ) &gd->bd->bi_enetaddr[3], 3);
1cdf5d92 SR	121	#elif defined(CFG_VXWORKS_MAC_PTR)
1cdf5d92 SR	122	tmp = (char *) CFG_VXWORKS_MAC_PTR;
458ded34 WD	123	memcpy ((char ) tmp, (char ) &gd->bd->bi_enetaddr[0], 6);
458ded34 WD	124	#else
4b9206ed	125	puts ("## Ethernet MAC address not copied to NV RAM\n");
458ded34 WD	126	#endif
458ded34 WD	127
8bde7f77 WD	128	/*
	129	* Use bootaddr to find the location in memory that VxWorks
	130	* will look for the bootline string. The default value for
	131	* PowerPC is LOCAL_MEM_LOCAL_ADRS + BOOT_LINE_OFFSET which
	132	* defaults to 0x4200
458ded34 WD	133	*/
	134
	135	if ((tmp = getenv ("bootaddr")) == NULL)
	136	bootaddr = 0x4200;
	137	else
	138	bootaddr = simple_strtoul (tmp, NULL, 16);
	139
8bde7f77 WD	140	/*
	141	* Check to see if the bootline is defined in the 'bootargs'
	142	* parameter. If it is not defined, we may be able to
	143	* construct the info
458ded34 WD	144	*/
	145
	146	if ((bootline = getenv ("bootargs")) != NULL) {
	147	memcpy ((void *) bootaddr, bootline, MAX(strlen(bootline), 255));
	148	flush_cache (bootaddr, MAX(strlen(bootline), 255));
	149	} else {
	150	#if defined(CONFIG_4xx)
	151	sprintf (build_buf, "ibmEmac(0,0)");
	152
	153	if ((tmp = getenv ("hostname")) != NULL) {
	154	sprintf (&build_buf[strlen (build_buf - 1)],
	155	"host:%s ", tmp);
	156	} else {
	157	sprintf (&build_buf[strlen (build_buf - 1)],
	158	": ");
	159	}
	160
	161	if ((tmp = getenv ("ipaddr")) != NULL) {
	162	sprintf (&build_buf[strlen (build_buf - 1)],
	163	"e=%s ", tmp);
	164	}
	165	memcpy ((void *)bootaddr, build_buf, MAX(strlen(build_buf), 255));
	166	flush_cache (bootaddr, MAX(strlen(build_buf), 255));
	167	#elif defined(CONFIG_IOP480)
	168	sprintf (build_buf, "dc(0,0)");
	169
	170	if ((tmp = getenv ("hostname")) != NULL) {
	171	sprintf (&build_buf[strlen (build_buf - 1)],
	172	"host:%s ", tmp);
	173	} else {
	174	sprintf (&build_buf[strlen (build_buf - 1)],
	175	": ");
	176	}
	177
	178	if ((tmp = getenv ("ipaddr")) != NULL) {
	179	sprintf (&build_buf[strlen (build_buf - 1)],
	180	"e=%s ", tmp);
	181	}
	182	memcpy ((void *) bootaddr, build_buf, MAX(strlen(build_buf), 255));
	183	flush_cache (bootaddr, MAX(strlen(build_buf), 255));
	184	#else
	185
8bde7f77 WD	186	/*
	187	* I'm not sure what the device should be for other
	188	* PPC flavors, the hostname and ipaddr should be ok
	189	* to just copy
458ded34 WD	190	*/
458ded34 WD	191
4b9206ed	192	puts ("No bootargs defined\n");
458ded34 WD	193	return 1;
	194	#endif
	195	}
	196
8bde7f77 WD	197	/*
	198	* If the data at the load address is an elf image, then
	199	* treat it like an elf image. Otherwise, assume that it is a
	200	* binary image
458ded34 WD	201	*/
	202
	203	if (valid_elf_image (addr)) {
	204	addr = load_elf_image (addr);
	205	} else {
4b9206ed	206	puts ("## Not an ELF image, assuming binary\n");
458ded34 WD	207	/* leave addr as load_addr */
	208	}
	209
	210	printf ("## Using bootline (@ 0x%lx): %s\n", bootaddr,
	211	(char *) bootaddr);
	212	printf ("## Starting vxWorks at 0x%08lx ...\n", addr);
	213
	214	((void (*)(void)) addr) ();
	215
4b9206ed	216	puts ("## vxWorks terminated\n");
458ded34 WD	217	return 1;
	218	}
	219
	220	/* ======================================================================
	221	* Determine if a valid ELF image exists at the given memory location.
	222	* First looks at the ELF header magic field, the makes sure that it is
	223	* executable and makes sure that it is for a PowerPC.
	224	* ====================================================================== */
	225	int valid_elf_image (unsigned long addr)
	226	{
	227	Elf32_Ehdr ehdr; / Elf header structure pointer */
	228
	229	/* -------------------------------------------------- */
	230
	231	ehdr = (Elf32_Ehdr *) addr;
	232
	233	if (!IS_ELF (*ehdr)) {
	234	printf ("## No elf image at address 0x%08lx\n", addr);
	235	return 0;
	236	}
	237
	238	if (ehdr->e_type != ET_EXEC) {
	239	printf ("## Not a 32-bit elf image at address 0x%08lx\n",
	240	addr);
	241	return 0;
	242	}
	243
6069ff26	244	#if 0
458ded34 WD	245	if (ehdr->e_machine != EM_PPC) {
	246	printf ("## Not a PowerPC elf image at address 0x%08lx\n",
	247	addr);
	248	return 0;
	249	}
6069ff26	250	#endif
458ded34 WD	251
	252	return 1;
	253	}
	254
	255
	256	/* ======================================================================
	257	* A very simple elf loader, assumes the image is valid, returns the
	258	* entry point address.
	259	* ====================================================================== */
	260	unsigned long load_elf_image (unsigned long addr)
	261	{
	262	Elf32_Ehdr ehdr; / Elf header structure pointer */
	263	Elf32_Shdr shdr; / Section header structure pointer */
	264	unsigned char strtab = 0; / String table pointer */
	265	unsigned char image; / Binary image pointer */
	266	int i; /* Loop counter */
	267
	268	/* -------------------------------------------------- */
	269
	270	ehdr = (Elf32_Ehdr *) addr;
	271
	272	/* Find the section header string table for output info */
	273	shdr = (Elf32_Shdr *) (addr + ehdr->e_shoff +
	274	(ehdr->e_shstrndx * sizeof (Elf32_Shdr)));
	275
	276	if (shdr->sh_type == SHT_STRTAB)
	277	strtab = (unsigned char *) (addr + shdr->sh_offset);
	278
	279	/* Load each appropriate section */
	280	for (i = 0; i < ehdr->e_shnum; ++i) {
	281	shdr = (Elf32_Shdr *) (addr + ehdr->e_shoff +
	282	(i * sizeof (Elf32_Shdr)));
	283
	284	if (!(shdr->sh_flags & SHF_ALLOC)
	285	\|\| shdr->sh_addr == 0 \|\| shdr->sh_size == 0) {
	286	continue;
	287	}
	288
	289	if (strtab) {
	290	printf ("%sing %s @ 0x%08lx (%ld bytes)\n",
	291	(shdr->sh_type == SHT_NOBITS) ?
	292	"Clear" : "Load",
	293	&strtab[shdr->sh_name],
	294	(unsigned long) shdr->sh_addr,
	295	(long) shdr->sh_size);
	296	}
	297
	298	if (shdr->sh_type == SHT_NOBITS) {
	299	memset ((void *)shdr->sh_addr, 0, shdr->sh_size);
	300	} else {
	301	image = (unsigned char *) addr + shdr->sh_offset;
	302	memcpy ((void *) shdr->sh_addr,
	303	(const void *) image,
	304	shdr->sh_size);
	305	}
	306	flush_cache (shdr->sh_addr, shdr->sh_size);
	307	}
	308
	309	return ehdr->e_entry;
	310	}
	311
	312	/* ====================================================================== */
0d498393 WD	313	U_BOOT_CMD(
0d498393 WD	314	bootelf, 2, 0, do_bootelf,
8bde7f77 WD	315	"bootelf - Boot from an ELF image in memory\n",
	316	" [address] - load address of ELF image.\n"
	317	);
	318
0d498393 WD	319	U_BOOT_CMD(
0d498393 WD	320	bootvx, 2, 0, do_bootvx,
8bde7f77 WD	321	"bootvx - Boot vxWorks from an ELF image\n",
	322	" [address] - load address of vxWorks ELF image.\n"
	323	);