[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);
static unsigned long load_elf_image_phdr(unsigned long addr);
static unsigned long load_elf_image_shdr(unsigned long addr);

/* Allow ports to override the default behavior */
__attribute__((weak))
unsigned long do_bootelf_exec (ulong (*entry)(int, char * const[]),
			       int argc, char * const 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 * const argv[])
{
	unsigned long addr;		/* Address of the ELF image     */
	unsigned long rc;		/* Return value from user code  */
	char *sload, *saddr;

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

	sload = saddr = NULL;
	if (argc == 3) {
		sload = argv[1];
		saddr = argv[2];
	} else if (argc == 2) {
		if (argv[1][0] == '-')
			sload = argv[1];
		else
			saddr = argv[1];
	}

	if (saddr)
		addr = simple_strtoul(saddr, NULL, 16);
	else
		addr = load_addr;

	if (!valid_elf_image (addr))
		return 1;

	if (sload && sload[1] == 'p')
		addr = load_elf_image_phdr(addr);
	else
		addr = load_elf_image_shdr(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 * const 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(TFTPGET) <= 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_shdr (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);

	dcache_disable();
	((void (*)(int)) addr) (0);

	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.
 * ====================================================================== */
static unsigned long load_elf_image_phdr(unsigned long addr)
{
	Elf32_Ehdr *ehdr;		/* Elf header structure pointer     */
	Elf32_Phdr *phdr;		/* Program header structure pointer */
	int i;

	ehdr = (Elf32_Ehdr *) addr;
	phdr = (Elf32_Phdr *) (addr + ehdr->e_phoff);

	/* Load each program header */
	for (i = 0; i < ehdr->e_phnum; ++i) {
		void *dst = (void *) phdr->p_paddr;
		void *src = (void *) addr + phdr->p_offset;
		debug("Loading phdr %i to 0x%p (%i bytes)\n",
			i, dst, phdr->p_filesz);
		if (phdr->p_filesz)
			memcpy(dst, src, phdr->p_filesz);
		if (phdr->p_filesz != phdr->p_memsz)
			memset(dst + phdr->p_filesz, 0x00, phdr->p_memsz - phdr->p_filesz);
		flush_cache((unsigned long)dst, phdr->p_filesz);
		++phdr;
	}

	return ehdr->e_entry;
}

static unsigned long load_elf_image_shdr(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,      3,      0,      do_bootelf,
	"Boot from an ELF image in memory",
	"[-p|-s] [address]\n"
	"\t- load ELF image at [address] via program headers (-p)\n"
	"\t  or via section headers (-s)"
);

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	27	int valid_elf_image (unsigned long addr);
f44a928e MF	28	static unsigned long load_elf_image_phdr(unsigned long addr);
f44a928e MF	29	static unsigned long load_elf_image_shdr(unsigned long addr);
017e9b79 MF	30
	31	/* Allow ports to override the default behavior */
	32	__attribute__((weak))
54841ab5 WD	33	unsigned long do_bootelf_exec (ulong (entry)(int, char const[]),
54841ab5 WD	34	int argc, char * const argv[])
1f1d88dd	35	{
017e9b79 MF	36	unsigned long ret;
017e9b79 MF	37
1f1d88dd MF	38	/*
	39	* QNX images require the data cache is disabled.
	40	* Data cache is already flushed, so just turn it off.
	41	*/
017e9b79 MF	42	int dcache = dcache_status ();
017e9b79 MF	43	if (dcache)
1f1d88dd MF	44	dcache_disable ();
1f1d88dd MF	45
017e9b79 MF	46	/*
	47	* pass address parameter as argv[0] (aka command name),
	48	* and all remaining args
	49	*/
	50	ret = entry (argc, argv);
1f1d88dd	51
017e9b79 MF	52	if (dcache)
	53	dcache_enable ();
	54
	55	return ret;
	56	}
458ded34 WD	57
	58	/* ======================================================================
	59	* Interpreter command to boot an arbitrary ELF image from memory.
	60	* ====================================================================== */
54841ab5	61	int do_bootelf (cmd_tbl_t cmdtp, int flag, int argc, char const argv[])
458ded34 WD	62	{
	63	unsigned long addr; /* Address of the ELF image */
	64	unsigned long rc; /* Return value from user code */
f44a928e	65	char sload, saddr;
458ded34 WD	66
	67	/* -------------------------------------------------- */
	68	int rcode = 0;
	69
f44a928e MF	70	sload = saddr = NULL;
	71	if (argc == 3) {
	72	sload = argv[1];
	73	saddr = argv[2];
	74	} else if (argc == 2) {
	75	if (argv[1][0] == '-')
	76	sload = argv[1];
	77	else
	78	saddr = argv[1];
	79	}
	80
	81	if (saddr)
	82	addr = simple_strtoul(saddr, NULL, 16);
458ded34	83	else
f44a928e	84	addr = load_addr;
458ded34 WD	85
	86	if (!valid_elf_image (addr))
	87	return 1;
	88
f44a928e MF	89	if (sload && sload[1] == 'p')
	90	addr = load_elf_image_phdr(addr);
	91	else
	92	addr = load_elf_image_shdr(addr);
458ded34 WD	93
	94	printf ("## Starting application at 0x%08lx ...\n", addr);
	95
458ded34 WD	96	/*
	97	* pass address parameter as argv[0] (aka command name),
	98	* and all remaining args
	99	*/
017e9b79	100	rc = do_bootelf_exec ((void *)addr, argc - 1, argv + 1);
458ded34 WD	101	if (rc != 0)
	102	rcode = 1;
	103
	104	printf ("## Application terminated, rc = 0x%lx\n", rc);
	105	return rcode;
	106	}
	107
	108	/* ======================================================================
	109	* Interpreter command to boot VxWorks from a memory image. The image can
	110	* be either an ELF image or a raw binary. Will attempt to setup the
	111	* bootline and other parameters correctly.
	112	* ====================================================================== */
54841ab5	113	int do_bootvx (cmd_tbl_t cmdtp, int flag, int argc, char const argv[])
458ded34	114	{
458ded34 WD	115	unsigned long addr; /* Address of image */
	116	unsigned long bootaddr; /* Address to put the bootline */
	117	char bootline; / Text of the bootline */
	118	char tmp; / Temporary char pointer */
29a4c24d	119	char build_buf[128]; /* Buffer for building the bootline */
458ded34	120
29a4c24d NG	121	/* ---------------------------------------------------
29a4c24d NG	122	*
458ded34 WD	123	* Check the loadaddr variable.
	124	* If we don't know where the image is then we're done.
	125	*/
	126
1bdd4683 SR	127	if (argc < 2)
	128	addr = load_addr;
	129	else
	130	addr = simple_strtoul (argv[1], NULL, 16);
458ded34	131
baa26db4	132	#if defined(CONFIG_CMD_NET)
458ded34 WD	133	/* Check to see if we need to tftp the image ourselves before starting */
	134
	135	if ((argc == 2) && (strcmp (argv[1], "tftp") == 0)) {
e4bf0c5c	136	if (NetLoop(TFTPGET) <= 0)
458ded34	137	return 1;
e4bf0c5c SG	138	printf("Automatic boot of VxWorks image at address 0x%08lx "
e4bf0c5c SG	139	"...\n", addr);
458ded34 WD	140	}
	141	#endif
	142
	143	/* This should equate
	144	* to NV_RAM_ADRS + NV_BOOT_OFFSET + NV_ENET_OFFSET
	145	* from the VxWorks BSP header files.
	146	* This will vary from board to board
	147	*/
	148
c157d8e2	149	#if defined(CONFIG_WALNUT)
6d0f6bcf	150	tmp = (char *) CONFIG_SYS_NVRAM_BASE_ADDR + 0x500;
76756e41	151	eth_getenv_enetaddr("ethaddr", (uchar *)build_buf);
62c93d92	152	memcpy(tmp, &build_buf[3], 3);
6d0f6bcf JCPV	153	#elif defined(CONFIG_SYS_VXWORKS_MAC_PTR)
6d0f6bcf JCPV	154	tmp = (char *) CONFIG_SYS_VXWORKS_MAC_PTR;
76756e41	155	eth_getenv_enetaddr("ethaddr", (uchar *)build_buf);
62c93d92	156	memcpy(tmp, build_buf, 6);
458ded34	157	#else
4b9206ed	158	puts ("## Ethernet MAC address not copied to NV RAM\n");
458ded34 WD	159	#endif
458ded34 WD	160
8bde7f77 WD	161	/*
	162	* Use bootaddr to find the location in memory that VxWorks
	163	* will look for the bootline string. The default value for
	164	* PowerPC is LOCAL_MEM_LOCAL_ADRS + BOOT_LINE_OFFSET which
	165	* defaults to 0x4200
458ded34 WD	166	*/
	167
	168	if ((tmp = getenv ("bootaddr")) == NULL)
29a4c24d	169	bootaddr = CONFIG_SYS_VXWORKS_BOOT_ADDR;
458ded34 WD	170	else
	171	bootaddr = simple_strtoul (tmp, NULL, 16);
	172
8bde7f77 WD	173	/*
	174	* Check to see if the bootline is defined in the 'bootargs'
	175	* parameter. If it is not defined, we may be able to
	176	* construct the info
458ded34 WD	177	*/
	178
	179	if ((bootline = getenv ("bootargs")) != NULL) {
29a4c24d NG	180	memcpy ((void *) bootaddr, bootline,
	181	max (strlen (bootline), 255));
	182	flush_cache (bootaddr, max (strlen (bootline), 255));
458ded34	183	} else {
458ded34	184
29a4c24d NG	185
	186	sprintf (build_buf, CONFIG_SYS_VXWORKS_BOOT_DEVICE);
	187	if ((tmp = getenv ("bootfile")) != NULL) {
	188	sprintf (&build_buf[strlen (build_buf)],
	189	"%s:%s ", CONFIG_SYS_VXWORKS_SERVERNAME, tmp);
458ded34	190	} else {
29a4c24d NG	191	sprintf (&build_buf[strlen (build_buf)],
29a4c24d NG	192	"%s:file ", CONFIG_SYS_VXWORKS_SERVERNAME);
458ded34 WD	193	}
	194
	195	if ((tmp = getenv ("ipaddr")) != NULL) {
29a4c24d	196	sprintf (&build_buf[strlen (build_buf)], "e=%s ", tmp);
458ded34	197	}
458ded34	198
29a4c24d NG	199	if ((tmp = getenv ("serverip")) != NULL) {
29a4c24d NG	200	sprintf (&build_buf[strlen (build_buf)], "h=%s ", tmp);
458ded34 WD	201	}
458ded34 WD	202
29a4c24d NG	203	if ((tmp = getenv ("hostname")) != NULL) {
29a4c24d NG	204	sprintf (&build_buf[strlen (build_buf)], "tn=%s ", tmp);
458ded34	205	}
29a4c24d NG	206	#ifdef CONFIG_SYS_VXWORKS_ADD_PARAMS
	207	sprintf (&build_buf[strlen (build_buf)],
	208	CONFIG_SYS_VXWORKS_ADD_PARAMS);
458ded34	209	#endif
29a4c24d NG	210
	211	memcpy ((void *) bootaddr, build_buf,
	212	max (strlen (build_buf), 255));
	213	flush_cache (bootaddr, max (strlen (build_buf), 255));
458ded34 WD	214	}
458ded34 WD	215
8bde7f77 WD	216	/*
	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
458ded34 WD	220	*/
	221
	222	if (valid_elf_image (addr)) {
f44a928e	223	addr = load_elf_image_shdr (addr);
458ded34	224	} else {
4b9206ed	225	puts ("## Not an ELF image, assuming binary\n");
458ded34 WD	226	/* 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
6eee21da RA	233	dcache_disable();
6eee21da RA	234	((void (*)(int)) addr) (0);
458ded34	235
4b9206ed	236	puts ("## vxWorks terminated\n");
458ded34 WD	237	return 1;
	238	}
	239
	240	/* ======================================================================
	241	* Determine if a valid ELF image exists at the given memory location.
	242	* First looks at the ELF header magic field, the makes sure that it is
	243	* executable and makes sure that it is for a PowerPC.
	244	* ====================================================================== */
	245	int valid_elf_image (unsigned long addr)
	246	{
	247	Elf32_Ehdr ehdr; / Elf header structure pointer */
	248
	249	/* -------------------------------------------------- */
	250
	251	ehdr = (Elf32_Ehdr *) addr;
	252
	253	if (!IS_ELF (*ehdr)) {
	254	printf ("## No elf image at address 0x%08lx\n", addr);
	255	return 0;
	256	}
	257
	258	if (ehdr->e_type != ET_EXEC) {
29a4c24d	259	printf ("## Not a 32-bit elf image at address 0x%08lx\n", addr);
458ded34 WD	260	return 0;
	261	}
	262
6069ff26	263	#if 0
458ded34 WD	264	if (ehdr->e_machine != EM_PPC) {
	265	printf ("## Not a PowerPC elf image at address 0x%08lx\n",
	266	addr);
	267	return 0;
	268	}
6069ff26	269	#endif
458ded34 WD	270
	271	return 1;
	272	}
	273
458ded34 WD	274	/* ======================================================================
	275	* A very simple elf loader, assumes the image is valid, returns the
	276	* entry point address.
	277	* ====================================================================== */
f44a928e MF	278	static unsigned long load_elf_image_phdr(unsigned long addr)
	279	{
	280	Elf32_Ehdr ehdr; / Elf header structure pointer */
	281	Elf32_Phdr phdr; / Program header structure pointer */
	282	int i;
	283
	284	ehdr = (Elf32_Ehdr *) addr;
	285	phdr = (Elf32_Phdr *) (addr + ehdr->e_phoff);
	286
	287	/* Load each program header */
	288	for (i = 0; i < ehdr->e_phnum; ++i) {
	289	void dst = (void ) phdr->p_paddr;
	290	void src = (void ) addr + phdr->p_offset;
	291	debug("Loading phdr %i to 0x%p (%i bytes)\n",
	292	i, dst, phdr->p_filesz);
	293	if (phdr->p_filesz)
	294	memcpy(dst, src, phdr->p_filesz);
	295	if (phdr->p_filesz != phdr->p_memsz)
	296	memset(dst + phdr->p_filesz, 0x00, phdr->p_memsz - phdr->p_filesz);
	297	flush_cache((unsigned long)dst, phdr->p_filesz);
	298	++phdr;
	299	}
	300
	301	return ehdr->e_entry;
	302	}
	303
	304	static unsigned long load_elf_image_shdr(unsigned long addr)
458ded34 WD	305	{
	306	Elf32_Ehdr ehdr; / Elf header structure pointer */
	307	Elf32_Shdr shdr; / Section header structure pointer */
	308	unsigned char strtab = 0; / String table pointer */
	309	unsigned char image; / Binary image pointer */
	310	int i; /* Loop counter */
	311
	312	/* -------------------------------------------------- */
	313
	314	ehdr = (Elf32_Ehdr *) addr;
	315
	316	/* Find the section header string table for output info */
	317	shdr = (Elf32_Shdr *) (addr + ehdr->e_shoff +
	318	(ehdr->e_shstrndx * sizeof (Elf32_Shdr)));
	319
	320	if (shdr->sh_type == SHT_STRTAB)
	321	strtab = (unsigned char *) (addr + shdr->sh_offset);
	322
	323	/* Load each appropriate section */
	324	for (i = 0; i < ehdr->e_shnum; ++i) {
	325	shdr = (Elf32_Shdr *) (addr + ehdr->e_shoff +
	326	(i * sizeof (Elf32_Shdr)));
	327
	328	if (!(shdr->sh_flags & SHF_ALLOC)
	329	\|\| shdr->sh_addr == 0 \|\| shdr->sh_size == 0) {
	330	continue;
	331	}
	332
	333	if (strtab) {
3c972849	334	debug("%sing %s @ 0x%08lx (%ld bytes)\n",
458ded34 WD	335	(shdr->sh_type == SHT_NOBITS) ?
	336	"Clear" : "Load",
	337	&strtab[shdr->sh_name],
	338	(unsigned long) shdr->sh_addr,
	339	(long) shdr->sh_size);
	340	}
	341
	342	if (shdr->sh_type == SHT_NOBITS) {
	343	memset ((void *)shdr->sh_addr, 0, shdr->sh_size);
	344	} else {
	345	image = (unsigned char *) addr + shdr->sh_offset;
	346	memcpy ((void *) shdr->sh_addr,
	347	(const void *) image,
	348	shdr->sh_size);
	349	}
	350	flush_cache (shdr->sh_addr, shdr->sh_size);
	351	}
	352
	353	return ehdr->e_entry;
	354	}
	355
	356	/* ====================================================================== */
0d498393	357	U_BOOT_CMD(
f44a928e	358	bootelf, 3, 0, do_bootelf,
2fb2604d	359	"Boot from an ELF image in memory",
f44a928e MF	360	"[-p\|-s] [address]\n"
	361	"\t- load ELF image at [address] via program headers (-p)\n"
	362	"\t or via section headers (-s)"
8bde7f77 WD	363	);
8bde7f77 WD	364
0d498393 WD	365	U_BOOT_CMD(
0d498393 WD	366	bootvx, 2, 0, do_bootvx,
2fb2604d	367	"Boot vxWorks from an ELF image",
a89c33db	368	" [address] - load address of vxWorks ELF image."
8bde7f77	369	);