[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>
#include <vxworks.h>

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

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

/* Allow ports to override the default behavior */
__attribute__((weak))
unsigned long do_bootelf_exec (ulong (*entry)(int, char *[]), int argc, char *argv[])
{
	unsigned long ret;

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

	/*
	 * pass address parameter as argv[0] (aka command name),
	 * and all remaining args
	 */
	ret = entry (argc, argv);

	if (dcache)
		dcache_enable ();

	return ret;
}

/* ======================================================================
 * 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);

	/*
	 * pass address parameter as argv[0] (aka command name),
	 * and all remaining args
	 */
	rc = do_bootelf_exec ((void *)addr, argc - 1, 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      */
	char build_buf[128];		/* Buffer for building the bootline */

	/* ---------------------------------------------------
	 *
	 * 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 *) CONFIG_SYS_NVRAM_BASE_ADDR + 0x500;
	eth_getenv_enetaddr("ethaddr", (uchar *)build_buf);
	memcpy(tmp, &build_buf[3], 3);
#elif defined(CONFIG_SYS_VXWORKS_MAC_PTR)
	tmp = (char *) CONFIG_SYS_VXWORKS_MAC_PTR;
	eth_getenv_enetaddr("ethaddr", (uchar *)build_buf);
	memcpy(tmp, build_buf, 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 = CONFIG_SYS_VXWORKS_BOOT_ADDR;
	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 {


		sprintf (build_buf, CONFIG_SYS_VXWORKS_BOOT_DEVICE);
		if ((tmp = getenv ("bootfile")) != NULL) {
			sprintf (&build_buf[strlen (build_buf)],
				 "%s:%s ", CONFIG_SYS_VXWORKS_SERVERNAME, tmp);
		} else {
			sprintf (&build_buf[strlen (build_buf)],
				 "%s:file ", CONFIG_SYS_VXWORKS_SERVERNAME);
		}

		if ((tmp = getenv ("ipaddr")) != NULL) {
			sprintf (&build_buf[strlen (build_buf)], "e=%s ", tmp);
		}

		if ((tmp = getenv ("serverip")) != NULL) {
			sprintf (&build_buf[strlen (build_buf)], "h=%s ", tmp);
		}

		if ((tmp = getenv ("hostname")) != NULL) {
			sprintf (&build_buf[strlen (build_buf)], "tn=%s ", tmp);
		}
#ifdef CONFIG_SYS_VXWORKS_ADD_PARAMS
		sprintf (&build_buf[strlen (build_buf)],
			 CONFIG_SYS_VXWORKS_ADD_PARAMS);
#endif

		memcpy ((void *) bootaddr, build_buf,
			max (strlen (build_buf), 255));
		flush_cache (bootaddr, max (strlen (build_buf), 255));
	}

	/*
	 * 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) {
			debug("%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,
	"Boot from an ELF image in memory",
	" [address] - load address of ELF image."
);

U_BOOT_CMD(
	bootvx,      2,      0,      do_bootvx,
	"Boot vxWorks from an ELF image",
	" [address] - load address of vxWorks ELF image."
);
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	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;
d87080b7 WD	25	#endif
458ded34	26
017e9b79 MF	27	int valid_elf_image (unsigned long addr);
	28	unsigned long load_elf_image (unsigned long addr);
	29
	30	/* Allow ports to override the default behavior */
	31	__attribute__((weak))
	32	unsigned long do_bootelf_exec (ulong (entry)(int, char []), int argc, char *argv[])
1f1d88dd	33	{
017e9b79 MF	34	unsigned long ret;
017e9b79 MF	35
1f1d88dd MF	36	/*
	37	* QNX images require the data cache is disabled.
	38	* Data cache is already flushed, so just turn it off.
	39	*/
017e9b79 MF	40	int dcache = dcache_status ();
017e9b79 MF	41	if (dcache)
1f1d88dd MF	42	dcache_disable ();
1f1d88dd MF	43
017e9b79 MF	44	/*
	45	* pass address parameter as argv[0] (aka command name),
	46	* and all remaining args
	47	*/
	48	ret = entry (argc, argv);
1f1d88dd	49
017e9b79 MF	50	if (dcache)
	51	dcache_enable ();
	52
	53	return ret;
	54	}
458ded34 WD	55
	56	/* ======================================================================
	57	* Interpreter command to boot an arbitrary ELF image from memory.
	58	* ====================================================================== */
	59	int do_bootelf (cmd_tbl_t cmdtp, int flag, int argc, char argv[])
	60	{
	61	unsigned long addr; /* Address of the ELF image */
	62	unsigned long rc; /* Return value from user code */
	63
	64	/* -------------------------------------------------- */
	65	int rcode = 0;
	66
	67	if (argc < 2)
	68	addr = load_addr;
	69	else
	70	addr = simple_strtoul (argv[1], NULL, 16);
	71
	72	if (!valid_elf_image (addr))
	73	return 1;
	74
	75	addr = load_elf_image (addr);
	76
	77	printf ("## Starting application at 0x%08lx ...\n", addr);
	78
458ded34 WD	79	/*
	80	* pass address parameter as argv[0] (aka command name),
	81	* and all remaining args
	82	*/
017e9b79	83	rc = do_bootelf_exec ((void *)addr, argc - 1, argv + 1);
458ded34 WD	84	if (rc != 0)
	85	rcode = 1;
	86
	87	printf ("## Application terminated, rc = 0x%lx\n", rc);
	88	return rcode;
	89	}
	90
	91	/* ======================================================================
	92	* Interpreter command to boot VxWorks from a memory image. The image can
	93	* be either an ELF image or a raw binary. Will attempt to setup the
	94	* bootline and other parameters correctly.
	95	* ====================================================================== */
1bdd4683	96	int do_bootvx (cmd_tbl_t cmdtp, int flag, int argc, char argv[])
458ded34	97	{
458ded34 WD	98	unsigned long addr; /* Address of image */
	99	unsigned long bootaddr; /* Address to put the bootline */
	100	char bootline; / Text of the bootline */
	101	char tmp; / Temporary char pointer */
29a4c24d	102	char build_buf[128]; /* Buffer for building the bootline */
458ded34	103
29a4c24d NG	104	/* ---------------------------------------------------
29a4c24d NG	105	*
458ded34 WD	106	* Check the loadaddr variable.
	107	* If we don't know where the image is then we're done.
	108	*/
	109
1bdd4683 SR	110	if (argc < 2)
	111	addr = load_addr;
	112	else
	113	addr = simple_strtoul (argv[1], NULL, 16);
458ded34	114
baa26db4	115	#if defined(CONFIG_CMD_NET)
458ded34 WD	116	/* Check to see if we need to tftp the image ourselves before starting */
	117
	118	if ((argc == 2) && (strcmp (argv[1], "tftp") == 0)) {
eb9401e3	119	if (NetLoop (TFTP) <= 0)
458ded34	120	return 1;
29a4c24d NG	121	printf ("Automatic boot of VxWorks image at address 0x%08lx ... \n",
29a4c24d NG	122	addr);
458ded34 WD	123	}
	124	#endif
	125
	126	/* This should equate
	127	* to NV_RAM_ADRS + NV_BOOT_OFFSET + NV_ENET_OFFSET
	128	* from the VxWorks BSP header files.
	129	* This will vary from board to board
	130	*/
	131
c157d8e2	132	#if defined(CONFIG_WALNUT)
6d0f6bcf	133	tmp = (char *) CONFIG_SYS_NVRAM_BASE_ADDR + 0x500;
76756e41	134	eth_getenv_enetaddr("ethaddr", (uchar *)build_buf);
62c93d92	135	memcpy(tmp, &build_buf[3], 3);
6d0f6bcf JCPV	136	#elif defined(CONFIG_SYS_VXWORKS_MAC_PTR)
6d0f6bcf JCPV	137	tmp = (char *) CONFIG_SYS_VXWORKS_MAC_PTR;
76756e41	138	eth_getenv_enetaddr("ethaddr", (uchar *)build_buf);
62c93d92	139	memcpy(tmp, build_buf, 6);
458ded34	140	#else
4b9206ed	141	puts ("## Ethernet MAC address not copied to NV RAM\n");
458ded34 WD	142	#endif
458ded34 WD	143
8bde7f77 WD	144	/*
	145	* Use bootaddr to find the location in memory that VxWorks
	146	* will look for the bootline string. The default value for
	147	* PowerPC is LOCAL_MEM_LOCAL_ADRS + BOOT_LINE_OFFSET which
	148	* defaults to 0x4200
458ded34 WD	149	*/
	150
	151	if ((tmp = getenv ("bootaddr")) == NULL)
29a4c24d	152	bootaddr = CONFIG_SYS_VXWORKS_BOOT_ADDR;
458ded34 WD	153	else
	154	bootaddr = simple_strtoul (tmp, NULL, 16);
	155
8bde7f77 WD	156	/*
	157	* Check to see if the bootline is defined in the 'bootargs'
	158	* parameter. If it is not defined, we may be able to
	159	* construct the info
458ded34 WD	160	*/
	161
	162	if ((bootline = getenv ("bootargs")) != NULL) {
29a4c24d NG	163	memcpy ((void *) bootaddr, bootline,
	164	max (strlen (bootline), 255));
	165	flush_cache (bootaddr, max (strlen (bootline), 255));
458ded34	166	} else {
458ded34	167
29a4c24d NG	168
	169	sprintf (build_buf, CONFIG_SYS_VXWORKS_BOOT_DEVICE);
	170	if ((tmp = getenv ("bootfile")) != NULL) {
	171	sprintf (&build_buf[strlen (build_buf)],
	172	"%s:%s ", CONFIG_SYS_VXWORKS_SERVERNAME, tmp);
458ded34	173	} else {
29a4c24d NG	174	sprintf (&build_buf[strlen (build_buf)],
29a4c24d NG	175	"%s:file ", CONFIG_SYS_VXWORKS_SERVERNAME);
458ded34 WD	176	}
	177
	178	if ((tmp = getenv ("ipaddr")) != NULL) {
29a4c24d	179	sprintf (&build_buf[strlen (build_buf)], "e=%s ", tmp);
458ded34	180	}
458ded34	181
29a4c24d NG	182	if ((tmp = getenv ("serverip")) != NULL) {
29a4c24d NG	183	sprintf (&build_buf[strlen (build_buf)], "h=%s ", tmp);
458ded34 WD	184	}
458ded34 WD	185
29a4c24d NG	186	if ((tmp = getenv ("hostname")) != NULL) {
29a4c24d NG	187	sprintf (&build_buf[strlen (build_buf)], "tn=%s ", tmp);
458ded34	188	}
29a4c24d NG	189	#ifdef CONFIG_SYS_VXWORKS_ADD_PARAMS
	190	sprintf (&build_buf[strlen (build_buf)],
	191	CONFIG_SYS_VXWORKS_ADD_PARAMS);
458ded34	192	#endif
29a4c24d NG	193
	194	memcpy ((void *) bootaddr, build_buf,
	195	max (strlen (build_buf), 255));
	196	flush_cache (bootaddr, max (strlen (build_buf), 255));
458ded34 WD	197	}
458ded34 WD	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) {
29a4c24d	241	printf ("## Not a 32-bit elf image at address 0x%08lx\n", addr);
458ded34 WD	242	return 0;
	243	}
	244
6069ff26	245	#if 0
458ded34 WD	246	if (ehdr->e_machine != EM_PPC) {
	247	printf ("## Not a PowerPC elf image at address 0x%08lx\n",
	248	addr);
	249	return 0;
	250	}
6069ff26	251	#endif
458ded34 WD	252
	253	return 1;
	254	}
	255
458ded34 WD	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) {
3c972849	290	debug("%sing %s @ 0x%08lx (%ld bytes)\n",
458ded34 WD	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,
2fb2604d	315	"Boot from an ELF image in memory",
a89c33db	316	" [address] - load address of ELF image."
8bde7f77 WD	317	);
8bde7f77 WD	318
0d498393 WD	319	U_BOOT_CMD(
0d498393 WD	320	bootvx, 2, 0, do_bootvx,
2fb2604d	321	"Boot vxWorks from an ELF image",
a89c33db	322	" [address] - load address of vxWorks ELF image."
8bde7f77	323	);