[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 <elf.h>
#include <net.h>
#include <vxworks.h>
#ifdef CONFIG_X86
#include <asm/e820.h>
#endif

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

	return ehdr->e_entry;
}

/* Allow ports to override the default behavior */
static 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;
}

/*
 * Determine if a valid ELF image exists at the given memory location.
 * First look at the ELF header magic field, then make sure that it is
 * executable.
 */
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;
	}

	return 1;
}

/* 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;
	const char *ep = getenv("autostart");

	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);

	if (ep && !strcmp(ep, "no"))
		return rcode;

	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 */
	int ptr = 0;
#ifdef CONFIG_X86
	struct e820info *info;
	struct e820entry *data;
#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 (net_loop(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 is
	 * (LOCAL_MEM_LOCAL_ADRS + BOOT_LINE_OFFSET) as defined by
	 * VxWorks BSP. For example, on PowerPC it defaults to 0x4200.
	 */
	tmp = getenv("bootaddr");
	if (!tmp) {
		printf("## VxWorks bootline address not specified\n");
	} 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.
		 */
		bootline = getenv("bootargs");
		if (bootline) {
			memcpy((void *)bootaddr, bootline,
			       max(strlen(bootline), (size_t)255));
			flush_cache(bootaddr, max(strlen(bootline),
						  (size_t)255));
		} else {
			tmp = getenv("bootdev");
			if (tmp)
				ptr = sprintf(build_buf, tmp);
			else
				printf("## VxWorks boot device not specified\n");

			tmp = getenv("bootfile");
			if (tmp)
				ptr += sprintf(build_buf + ptr,
					       "host:%s ", tmp);
			else
				ptr += sprintf(build_buf + ptr,
					       "host:vxWorks ");

			/*
			 * The following parameters are only needed if 'bootdev'
			 * is an ethernet device, otherwise they are optional.
			 */
			tmp = getenv("ipaddr");
			if (tmp) {
				ptr += sprintf(build_buf + ptr, "e=%s", tmp);
				tmp = getenv("netmask");
				if (tmp) {
					u32 mask = getenv_ip("netmask").s_addr;
					ptr += sprintf(build_buf + ptr,
						       ":%08x ", ntohl(mask));
				} else {
					ptr += sprintf(build_buf + ptr, " ");
				}
			}

			tmp = getenv("serverip");
			if (tmp)
				ptr += sprintf(build_buf + ptr, "h=%s ", tmp);

			tmp = getenv("gatewayip");
			if (tmp)
				ptr += sprintf(build_buf + ptr, "g=%s ", tmp);

			tmp = getenv("hostname");
			if (tmp)
				ptr += sprintf(build_buf + ptr, "tn=%s ", tmp);

			tmp = getenv("othbootargs");
			if (tmp)
				ptr += sprintf(build_buf + ptr, tmp);

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

		printf("## Using bootline (@ 0x%lx): %s\n", bootaddr,
		       (char *)bootaddr);
	}

#ifdef CONFIG_X86
	/*
	 * Since E820 information is critical to the kernel, if we don't
	 * specify these in the environments, use a default one.
	 */
	tmp = getenv("e820data");
	if (tmp)
		data = (struct e820entry *)simple_strtoul(tmp, NULL, 16);
	else
		data = (struct e820entry *)VXWORKS_E820_DATA_ADDR;
	tmp = getenv("e820info");
	if (tmp)
		info = (struct e820info *)simple_strtoul(tmp, NULL, 16);
	else
		info = (struct e820info *)VXWORKS_E820_INFO_ADDR;

	memset(info, 0, sizeof(struct e820info));
	info->sign = E820_SIGNATURE;
	info->entries = install_e820_map(E820MAX, data);
	info->addr = (info->entries - 1) * sizeof(struct e820entry) +
		     VXWORKS_E820_DATA_ADDR;
#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_shdr(addr);
	else
		puts("## Not an ELF image, assuming binary\n");

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

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

	puts("## vxWorks terminated\n");

	return 1;
}

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>
458ded34	18	#include <elf.h>
ebca3df7	19	#include <net.h>
29a4c24d	20	#include <vxworks.h>
b90ff0fd BM	21	#ifdef CONFIG_X86
	22	#include <asm/e820.h>
	23	#endif
458ded34	24
9dffa52d BM	25	/*
	26	* A very simple elf loader, assumes the image is valid, returns the
	27	* entry point address.
	28	*/
	29	static unsigned long load_elf_image_phdr(unsigned long addr)
	30	{
	31	Elf32_Ehdr ehdr; / Elf header structure pointer */
	32	Elf32_Phdr phdr; / Program header structure pointer */
	33	int i;
	34
	35	ehdr = (Elf32_Ehdr *)addr;
	36	phdr = (Elf32_Phdr *)(addr + ehdr->e_phoff);
	37
	38	/* Load each program header */
	39	for (i = 0; i < ehdr->e_phnum; ++i) {
	40	void dst = (void )(uintptr_t)phdr->p_paddr;
	41	void src = (void )addr + phdr->p_offset;
	42	debug("Loading phdr %i to 0x%p (%i bytes)\n",
	43	i, dst, phdr->p_filesz);
	44	if (phdr->p_filesz)
	45	memcpy(dst, src, phdr->p_filesz);
	46	if (phdr->p_filesz != phdr->p_memsz)
	47	memset(dst + phdr->p_filesz, 0x00,
	48	phdr->p_memsz - phdr->p_filesz);
	49	flush_cache((unsigned long)dst, phdr->p_filesz);
	50	++phdr;
	51	}
	52
	53	return ehdr->e_entry;
	54	}
	55
	56	static unsigned long load_elf_image_shdr(unsigned long addr)
	57	{
	58	Elf32_Ehdr ehdr; / Elf header structure pointer */
	59	Elf32_Shdr shdr; / Section header structure pointer */
	60	unsigned char strtab = 0; / String table pointer */
	61	unsigned char image; / Binary image pointer */
	62	int i; /* Loop counter */
	63
	64	ehdr = (Elf32_Ehdr *)addr;
	65
	66	/* Find the section header string table for output info */
	67	shdr = (Elf32_Shdr *)(addr + ehdr->e_shoff +
	68	(ehdr->e_shstrndx * sizeof(Elf32_Shdr)));
	69
	70	if (shdr->sh_type == SHT_STRTAB)
	71	strtab = (unsigned char *)(addr + shdr->sh_offset);
	72
	73	/* Load each appropriate section */
	74	for (i = 0; i < ehdr->e_shnum; ++i) {
	75	shdr = (Elf32_Shdr *)(addr + ehdr->e_shoff +
	76	(i * sizeof(Elf32_Shdr)));
	77
	78	if (!(shdr->sh_flags & SHF_ALLOC) \|\|
	79	shdr->sh_addr == 0 \|\| shdr->sh_size == 0) {
	80	continue;
	81	}
	82
	83	if (strtab) {
	84	debug("%sing %s @ 0x%08lx (%ld bytes)\n",
	85	(shdr->sh_type == SHT_NOBITS) ? "Clear" : "Load",
	86	&strtab[shdr->sh_name],
	87	(unsigned long)shdr->sh_addr,
	88	(long)shdr->sh_size);
89	}
90
91	if (shdr->sh_type == SHT_NOBITS) {
92	memset((void *)(uintptr_t)shdr->sh_addr, 0,
93	shdr->sh_size);
94	} else {
95	image = (unsigned char *)addr + shdr->sh_offset;
96	memcpy((void *)(uintptr_t)shdr->sh_addr,
97	(const void *)image, shdr->sh_size);
98	}
99	flush_cache(shdr->sh_addr, shdr->sh_size);
100	}
101
102	return ehdr->e_entry;
103	}
017e9b79 MF	104
017e9b79 MF	105	/* Allow ports to override the default behavior */
553d8c3a	106	static unsigned long do_bootelf_exec(ulong (entry)(int, char const[]),
ebca3df7	107	int argc, char * const argv[])
1f1d88dd	108	{
017e9b79 MF	109	unsigned long ret;
017e9b79 MF	110
1f1d88dd MF	111	/*
	112	* QNX images require the data cache is disabled.
	113	* Data cache is already flushed, so just turn it off.
	114	*/
62e03d33	115	int dcache = dcache_status();
017e9b79	116	if (dcache)
62e03d33	117	dcache_disable();
1f1d88dd	118
017e9b79 MF	119	/*
	120	* pass address parameter as argv[0] (aka command name),
	121	* and all remaining args
	122	*/
62e03d33	123	ret = entry(argc, argv);
1f1d88dd	124
017e9b79	125	if (dcache)
62e03d33	126	dcache_enable();
017e9b79 MF	127
	128	return ret;
	129	}
458ded34	130
ebca3df7	131	/*
62e03d33	132	* Determine if a valid ELF image exists at the given memory location.
ebca3df7 BM	133	* First look at the ELF header magic field, then make sure that it is
	134	* executable.
	135	*/
62e03d33 DS	136	int valid_elf_image(unsigned long addr)
62e03d33 DS	137	{
ebca3df7	138	Elf32_Ehdr ehdr; / Elf header structure pointer */
62e03d33	139
ebca3df7	140	ehdr = (Elf32_Ehdr *)addr;
62e03d33 DS	141
	142	if (!IS_ELF(*ehdr)) {
	143	printf("## No elf image at address 0x%08lx\n", addr);
	144	return 0;
	145	}
	146
	147	if (ehdr->e_type != ET_EXEC) {
	148	printf("## Not a 32-bit elf image at address 0x%08lx\n", addr);
	149	return 0;
	150	}
	151
62e03d33 DS	152	return 1;
	153	}
	154
ebca3df7	155	/* Interpreter command to boot an arbitrary ELF image from memory */
62e03d33	156	int do_bootelf(cmd_tbl_t cmdtp, int flag, int argc, char const argv[])
458ded34	157	{
ebca3df7 BM	158	unsigned long addr; /* Address of the ELF image */
ebca3df7 BM	159	unsigned long rc; /* Return value from user code */
f44a928e	160	char sload, saddr;
44c8fd3a	161	const char *ep = getenv("autostart");
458ded34	162
458ded34 WD	163	int rcode = 0;
458ded34 WD	164
f44a928e MF	165	sload = saddr = NULL;
	166	if (argc == 3) {
	167	sload = argv[1];
	168	saddr = argv[2];
	169	} else if (argc == 2) {
	170	if (argv[1][0] == '-')
	171	sload = argv[1];
	172	else
	173	saddr = argv[1];
	174	}
	175
	176	if (saddr)
	177	addr = simple_strtoul(saddr, NULL, 16);
458ded34	178	else
f44a928e	179	addr = load_addr;
458ded34	180
62e03d33	181	if (!valid_elf_image(addr))
458ded34 WD	182	return 1;
458ded34 WD	183
f44a928e MF	184	if (sload && sload[1] == 'p')
	185	addr = load_elf_image_phdr(addr);
	186	else
	187	addr = load_elf_image_shdr(addr);
458ded34	188
44c8fd3a SDPP	189	if (ep && !strcmp(ep, "no"))
	190	return rcode;
	191
62e03d33	192	printf("## Starting application at 0x%08lx ...\n", addr);
458ded34	193
458ded34 WD	194	/*
	195	* pass address parameter as argv[0] (aka command name),
	196	* and all remaining args
	197	*/
62e03d33	198	rc = do_bootelf_exec((void *)addr, argc - 1, argv + 1);
458ded34 WD	199	if (rc != 0)
	200	rcode = 1;
	201
62e03d33	202	printf("## Application terminated, rc = 0x%lx\n", rc);
ebca3df7	203
458ded34 WD	204	return rcode;
	205	}
	206
ebca3df7	207	/*
458ded34 WD	208	* Interpreter command to boot VxWorks from a memory image. The image can
	209	* be either an ELF image or a raw binary. Will attempt to setup the
	210	* bootline and other parameters correctly.
ebca3df7	211	*/
62e03d33	212	int do_bootvx(cmd_tbl_t cmdtp, int flag, int argc, char const argv[])
458ded34	213	{
ebca3df7 BM	214	unsigned long addr; /* Address of image */
	215	unsigned long bootaddr; /* Address to put the bootline */
	216	char bootline; / Text of the bootline */
	217	char tmp; / Temporary char pointer */
	218	char build_buf[128]; /* Buffer for building the bootline */
7f0c3c51	219	int ptr = 0;
b90ff0fd BM	220	#ifdef CONFIG_X86
	221	struct e820info *info;
	222	struct e820entry *data;
	223	#endif
ebca3df7 BM	224
ebca3df7 BM	225	/*
458ded34 WD	226	* Check the loadaddr variable.
	227	* If we don't know where the image is then we're done.
	228	*/
07a1a0c9	229	if (argc < 2)
1bdd4683 SR	230	addr = load_addr;
1bdd4683 SR	231	else
07a1a0c9	232	addr = simple_strtoul(argv[1], NULL, 16);
458ded34	233
baa26db4	234	#if defined(CONFIG_CMD_NET)
62e03d33	235	/*
ebca3df7 BM	236	* Check to see if we need to tftp the image ourselves
ebca3df7 BM	237	* before starting
62e03d33	238	*/
07a1a0c9	239	if ((argc == 2) && (strcmp(argv[1], "tftp") == 0)) {
bc0571fc	240	if (net_loop(TFTPGET) <= 0)
458ded34	241	return 1;
62e03d33 DS	242	printf("Automatic boot of VxWorks image at address 0x%08lx ...\n",
62e03d33 DS	243	addr);
458ded34 WD	244	}
	245	#endif
	246
ebca3df7 BM	247	/*
	248	* This should equate to
	249	* NV_RAM_ADRS + NV_BOOT_OFFSET + NV_ENET_OFFSET
458ded34 WD	250	* from the VxWorks BSP header files.
	251	* This will vary from board to board
	252	*/
c157d8e2	253	#if defined(CONFIG_WALNUT)
ebca3df7	254	tmp = (char *)CONFIG_SYS_NVRAM_BASE_ADDR + 0x500;
76756e41	255	eth_getenv_enetaddr("ethaddr", (uchar *)build_buf);
62c93d92	256	memcpy(tmp, &build_buf[3], 3);
6d0f6bcf	257	#elif defined(CONFIG_SYS_VXWORKS_MAC_PTR)
ebca3df7	258	tmp = (char *)CONFIG_SYS_VXWORKS_MAC_PTR;
76756e41	259	eth_getenv_enetaddr("ethaddr", (uchar *)build_buf);
62c93d92	260	memcpy(tmp, build_buf, 6);
458ded34	261	#else
62e03d33	262	puts("## Ethernet MAC address not copied to NV RAM\n");
458ded34 WD	263	#endif
458ded34 WD	264
8bde7f77 WD	265	/*
8bde7f77 WD	266	* Use bootaddr to find the location in memory that VxWorks
9e98b7e3 BM	267	* will look for the bootline string. The default value is
	268	* (LOCAL_MEM_LOCAL_ADRS + BOOT_LINE_OFFSET) as defined by
	269	* VxWorks BSP. For example, on PowerPC it defaults to 0x4200.
458ded34	270	*/
62e03d33	271	tmp = getenv("bootaddr");
9e98b7e3 BM	272	if (!tmp) {
9e98b7e3 BM	273	printf("## VxWorks bootline address not specified\n");
458ded34	274	} else {
9e98b7e3	275	bootaddr = simple_strtoul(tmp, NULL, 16);
458ded34	276
9e98b7e3 BM	277	/*
	278	* Check to see if the bootline is defined in the 'bootargs'
	279	* parameter. If it is not defined, we may be able to
	280	* construct the info.
	281	*/
	282	bootline = getenv("bootargs");
	283	if (bootline) {
	284	memcpy((void *)bootaddr, bootline,
	285	max(strlen(bootline), (size_t)255));
	286	flush_cache(bootaddr, max(strlen(bootline),
	287	(size_t)255));
	288	} else {
	289	tmp = getenv("bootdev");
	290	if (tmp)
	291	ptr = sprintf(build_buf, tmp);
	292	else
	293	printf("## VxWorks boot device not specified\n");
	294
	295	tmp = getenv("bootfile");
	296	if (tmp)
	297	ptr += sprintf(build_buf + ptr,
	298	"host:%s ", tmp);
	299	else
	300	ptr += sprintf(build_buf + ptr,
	301	"host:vxWorks ");
	302
	303	/*
	304	* The following parameters are only needed if 'bootdev'
	305	* is an ethernet device, otherwise they are optional.
	306	*/
	307	tmp = getenv("ipaddr");
a4092dbd	308	if (tmp) {
9e98b7e3 BM	309	ptr += sprintf(build_buf + ptr, "e=%s", tmp);
	310	tmp = getenv("netmask");
	311	if (tmp) {
	312	u32 mask = getenv_ip("netmask").s_addr;
	313	ptr += sprintf(build_buf + ptr,
	314	":%08x ", ntohl(mask));
	315	} else {
	316	ptr += sprintf(build_buf + ptr, " ");
	317	}
a4092dbd	318	}
458ded34	319
9e98b7e3 BM	320	tmp = getenv("serverip");
	321	if (tmp)
	322	ptr += sprintf(build_buf + ptr, "h=%s ", tmp);
62e03d33	323
9e98b7e3 BM	324	tmp = getenv("gatewayip");
	325	if (tmp)
	326	ptr += sprintf(build_buf + ptr, "g=%s ", tmp);
a4092dbd	327
9e98b7e3 BM	328	tmp = getenv("hostname");
	329	if (tmp)
	330	ptr += sprintf(build_buf + ptr, "tn=%s ", tmp);
458ded34	331
9e98b7e3 BM	332	tmp = getenv("othbootargs");
	333	if (tmp)
	334	ptr += sprintf(build_buf + ptr, tmp);
	335
	336	memcpy((void *)bootaddr, build_buf,
	337	max(strlen(build_buf), (size_t)255));
	338	flush_cache(bootaddr, max(strlen(build_buf),
	339	(size_t)255));
	340	}
29a4c24d	341
9e98b7e3 BM	342	printf("## Using bootline (@ 0x%lx): %s\n", bootaddr,
9e98b7e3 BM	343	(char *)bootaddr);
458ded34 WD	344	}
458ded34 WD	345
b90ff0fd BM	346	#ifdef CONFIG_X86
	347	/*
	348	* Since E820 information is critical to the kernel, if we don't
	349	* specify these in the environments, use a default one.
	350	*/
	351	tmp = getenv("e820data");
	352	if (tmp)
	353	data = (struct e820entry *)simple_strtoul(tmp, NULL, 16);
	354	else
	355	data = (struct e820entry *)VXWORKS_E820_DATA_ADDR;
	356	tmp = getenv("e820info");
	357	if (tmp)
	358	info = (struct e820info *)simple_strtoul(tmp, NULL, 16);
	359	else
	360	info = (struct e820info *)VXWORKS_E820_INFO_ADDR;
	361
	362	memset(info, 0, sizeof(struct e820info));
	363	info->sign = E820_SIGNATURE;
	364	info->entries = install_e820_map(E820MAX, data);
	365	info->addr = (info->entries - 1) * sizeof(struct e820entry) +
	366	VXWORKS_E820_DATA_ADDR;
	367	#endif
	368
8bde7f77 WD	369	/*
	370	* If the data at the load address is an elf image, then
	371	* treat it like an elf image. Otherwise, assume that it is a
ebca3df7	372	* binary image.
458ded34	373	*/
ebca3df7	374	if (valid_elf_image(addr))
62e03d33	375	addr = load_elf_image_shdr(addr);
ebca3df7	376	else
62e03d33	377	puts("## Not an ELF image, assuming binary\n");
458ded34	378
62e03d33	379	printf("## Starting vxWorks at 0x%08lx ...\n", addr);
458ded34	380
6eee21da	381	dcache_disable();
ebca3df7	382	((void (*)(int))addr)(0);
458ded34	383
62e03d33	384	puts("## vxWorks terminated\n");
ebca3df7	385
458ded34 WD	386	return 1;
	387	}
	388
0d498393	389	U_BOOT_CMD(
ebca3df7	390	bootelf, 3, 0, do_bootelf,
2fb2604d	391	"Boot from an ELF image in memory",
f44a928e MF	392	"[-p\|-s] [address]\n"
	393	"\t- load ELF image at [address] via program headers (-p)\n"
	394	"\t or via section headers (-s)"
8bde7f77 WD	395	);
8bde7f77 WD	396
0d498393	397	U_BOOT_CMD(
ebca3df7	398	bootvx, 2, 0, do_bootvx,
2fb2604d	399	"Boot vxWorks from an ELF image",
a89c33db	400	" [address] - load address of vxWorks ELF image."
8bde7f77	401	);