cmd_bootm.c

	switch (hdr->ih_comp) {
	case IH_COMP_NONE:	comp = "uncompressed";		break;
	case IH_COMP_GZIP:	comp = "gzip compressed";	break;
	case IH_COMP_BZIP2:	comp = "bzip2 compressed";	break;
	default:		comp = "unknown compression";	break;
	}

	printf ("%s %s %s (%s)", arch, os, type, comp);
}

#define	ZALLOC_ALIGNMENT	16

static void *zalloc(void *x, unsigned items, unsigned size)
{
	void *p;

	size *= items;
	size = (size + ZALLOC_ALIGNMENT - 1) & ~(ZALLOC_ALIGNMENT - 1);

	p = malloc (size);

	return (p);
}

static void zfree(void *x, void *addr, unsigned nb)
{
	free (addr);
}

#define HEAD_CRC	2
#define EXTRA_FIELD	4
#define ORIG_NAME	8
#define COMMENT		0x10
#define RESERVED	0xe0

#define DEFLATED	8

int gunzip(void *dst, int dstlen, unsigned char *src, int *lenp)
{
	z_stream s;
	int r, i, flags;

	/* skip header */
	i = 10;
	flags = src[3];
	if (src[2] != DEFLATED || (flags & RESERVED) != 0) {
		printf ("Error: Bad gzipped data\n");
		return (-1);
	}
	if ((flags & EXTRA_FIELD) != 0)
		i = 12 + src[10] + (src[11] << 8);
	if ((flags & ORIG_NAME) != 0)
		while (src[i++] != 0)
			;
	if ((flags & COMMENT) != 0)
		while (src[i++] != 0)
			;
	if ((flags & HEAD_CRC) != 0)
		i += 2;
	if (i >= *lenp) {
		printf ("Error: gunzip out of data in header\n");
		return (-1);
	}

	s.zalloc = zalloc;
	s.zfree = zfree;
#if defined(CONFIG_HW_WATCHDOG) || defined(CONFIG_WATCHDOG)
	s.outcb = (cb_func)WATCHDOG_RESET;
#else
	s.outcb = Z_NULL;
#endif	/* CONFIG_HW_WATCHDOG */

	r = inflateInit2(&s, -MAX_WBITS);
	if (r != Z_OK) {
		printf ("Error: inflateInit2() returned %d\n", r);
		return (-1);
	}
	s.next_in = src + i;
	s.avail_in = *lenp - i;
	s.next_out = dst;
	s.avail_out = dstlen;
	r = inflate(&s, Z_FINISH);
	if (r != Z_OK && r != Z_STREAM_END) {
		printf ("Error: inflate() returned %d\n", r);
		return (-1);
	}
	*lenp = s.next_out - (unsigned char *) dst;
	inflateEnd(&s);

	return (0);
}

static void
do_bootm_rtems (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
		ulong addr, ulong *len_ptr, int verify)
{
	DECLARE_GLOBAL_DATA_PTR;
	image_header_t *hdr = &header;
	void	(*entry_point)(bd_t *);

	entry_point = (void (*)(bd_t *)) hdr->ih_ep;

	printf ("## Transferring control to RTEMS (at address %08lx) ...\n",
		(ulong)entry_point);

	SHOW_BOOT_PROGRESS (15);

	/*
	 * RTEMS Parameters:
	 *   r3: ptr to board info data
	 */

	(*entry_point ) ( gd->bd );
}

#if (CONFIG_COMMANDS & CFG_CMD_ELF)
static void
do_bootm_vxworks (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
		  ulong addr, ulong *len_ptr, int verify)
{
	image_header_t *hdr = &header;
	char str[80];

	sprintf(str, "%x", hdr->ih_ep); /* write entry-point into string */
	setenv("loadaddr", str);
	do_bootvx(cmdtp, 0, 0, NULL);
}

static void
do_bootm_qnxelf (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
		 ulong addr, ulong *len_ptr, int verify)
{
	image_header_t *hdr = &header;
	char *local_args[2];
	char str[16];

	sprintf(str, "%x", hdr->ih_ep); /* write entry-point into string */
	local_args[0] = argv[0];
	local_args[1] = str;	/* and provide it via the arguments */
	do_bootelf(cmdtp, 0, 2, local_args);
}
#endif /* CFG_CMD_ELF */