cmd_bootm.c.svn-base

u-boot loader common files, like cpu, clock, environment...etc...

{
	DECLARE_GLOBAL_DATA_PTR;
	char buf[256], *start, *end;
	char *cmdline = getenv ("bootargs");

	/* Only fix cmdline when requested */
	if (!(gd->flags & GD_FLG_SILENT))
		return;

	debug ("before silent fix-up: %s\n", cmdline);
	if (cmdline) {
		if ((start = strstr (cmdline, "console=")) != NULL) {
			end = strchr (start, ' ');
			strncpy (buf, cmdline, (start - cmdline + 8));
			if (end)
				strcpy (buf + (start - cmdline + 8), end);
			else
				buf[start - cmdline + 8] = '\0';
		} else {
			strcpy (buf, cmdline);
			strcat (buf, " console=");
		}
	} else {
		strcpy (buf, "console=");
	}

	setenv ("bootargs", buf);
	debug ("after silent fix-up: %s\n", buf);
}
#endif /* CONFIG_SILENT_CONSOLE */

#ifdef CONFIG_PPC
static void
do_bootm_linux (cmd_tbl_t *cmdtp, int flag,
		int	argc, char *argv[],
		ulong	addr,
		ulong	*len_ptr,
		int	verify)
{
	DECLARE_GLOBAL_DATA_PTR;

	ulong	sp;
	ulong	len, checksum;
	ulong	initrd_start, initrd_end;
	ulong	cmd_start, cmd_end;
	ulong	initrd_high;
	ulong	data;
	int	initrd_copy_to_ram = 1;
	char    *cmdline;
	char	*s;
	bd_t	*kbd;
	void	(*kernel)(bd_t *, ulong, ulong, ulong, ulong);
	image_header_t *hdr = &header;

	if ((s = getenv ("initrd_high")) != NULL) {
		/* a value of "no" or a similar string will act like 0,
		 * turning the "load high" feature off. This is intentional.
		 */
		initrd_high = simple_strtoul(s, NULL, 16);
		if (initrd_high == ~0)
			initrd_copy_to_ram = 0;
	} else {	/* not set, no restrictions to load high */
		initrd_high = ~0;
	}

#ifdef CONFIG_LOGBUFFER
	kbd=gd->bd;
	/* Prevent initrd from overwriting logbuffer */
	if (initrd_high < (kbd->bi_memsize-LOGBUFF_LEN-LOGBUFF_OVERHEAD))
		initrd_high = kbd->bi_memsize-LOGBUFF_LEN-LOGBUFF_OVERHEAD;
	debug ("## Logbuffer at 0x%08lX ", kbd->bi_memsize-LOGBUFF_LEN);
#endif

	/*
	 * Booting a (Linux) kernel image
	 *
	 * Allocate space for command line and board info - the
	 * address should be as high as possible within the reach of
	 * the kernel (see CFG_BOOTMAPSZ settings), but in unused
	 * memory, which means far enough below the current stack
	 * pointer.
	 */

	asm( "mr %0,1": "=r"(sp) : );

	debug ("## Current stack ends at 0x%08lX ", sp);

	sp -= 2048;		/* just to be sure */
	if (sp > CFG_BOOTMAPSZ)
		sp = CFG_BOOTMAPSZ;
	sp &= ~0xF;

	debug ("=> set upper limit to 0x%08lX\n", sp);

	cmdline = (char *)((sp - CFG_BARGSIZE) & ~0xF);
	kbd = (bd_t *)(((ulong)cmdline - sizeof(bd_t)) & ~0xF);

	if ((s = getenv("bootargs")) == NULL)
		s = "";

	strcpy (cmdline, s);

	cmd_start    = (ulong)&cmdline[0];
	cmd_end      = cmd_start + strlen(cmdline);

	*kbd = *(gd->bd);

#ifdef	DEBUG
	printf ("## cmdline at 0x%08lX ... 0x%08lX\n", cmd_start, cmd_end);

	do_bdinfo (NULL, 0, 0, NULL);
#endif

	if ((s = getenv ("clocks_in_mhz")) != NULL) {
		/* convert all clock information to MHz */
		kbd->bi_intfreq /= 1000000L;
		kbd->bi_busfreq /= 1000000L;
#if defined(CONFIG_8260) || defined(CONFIG_MPC8560)
		kbd->bi_cpmfreq /= 1000000L;
		kbd->bi_brgfreq /= 1000000L;
		kbd->bi_sccfreq /= 1000000L;
		kbd->bi_vco     /= 1000000L;
#endif /* CONFIG_8260 */
#if defined(CONFIG_MPC5xxx)
		kbd->bi_ipbfreq /= 1000000L;
		kbd->bi_pcifreq /= 1000000L;
#endif /* CONFIG_MPC5xxx */
	}

	kernel = (void (*)(bd_t *, ulong, ulong, ulong, ulong))hdr->ih_ep;

	/*
	 * Check if there is an initrd image
	 */
	if (argc >= 3) {
		SHOW_BOOT_PROGRESS (9);

		addr = simple_strtoul(argv[2], NULL, 16);

		printf ("## Loading RAMDisk Image at %08lx ...\n", addr);

		/* Copy header so we can blank CRC field for re-calculation */
		memmove (&header, (char *)addr, sizeof(image_header_t));

		if (hdr->ih_magic  != IH_MAGIC) {
			puts ("Bad Magic Number\n");
			SHOW_BOOT_PROGRESS (-10);
			do_reset (cmdtp, flag, argc, argv);
		}

		data = (ulong)&header;
		len  = sizeof(image_header_t);

		checksum = hdr->ih_hcrc;
		hdr->ih_hcrc = 0;

		if (crc32 (0, (char *)data, len) != checksum) {
			puts ("Bad Header Checksum\n");
			SHOW_BOOT_PROGRESS (-11);
			do_reset (cmdtp, flag, argc, argv);
		}

		SHOW_BOOT_PROGRESS (10);

		print_image_hdr (hdr);

		data = addr + sizeof(image_header_t);
		len  = hdr->ih_size;

		if (verify) {
			ulong csum = 0;
#if defined(CONFIG_HW_WATCHDOG) || defined(CONFIG_WATCHDOG)
			ulong cdata = data, edata = cdata + len;
#endif	/* CONFIG_HW_WATCHDOG || CONFIG_WATCHDOG */

			puts ("   Verifying Checksum ... ");

#if defined(CONFIG_HW_WATCHDOG) || defined(CONFIG_WATCHDOG)

			while (cdata < edata) {
				ulong chunk = edata - cdata;

				if (chunk > CHUNKSZ)
					chunk = CHUNKSZ;
				csum = crc32 (csum, (char *)cdata, chunk);
				cdata += chunk;

				WATCHDOG_RESET();
			}
#else	/* !(CONFIG_HW_WATCHDOG || CONFIG_WATCHDOG) */
			csum = crc32 (0, (char *)data, len);
#endif	/* CONFIG_HW_WATCHDOG || CONFIG_WATCHDOG */

			if (csum != hdr->ih_dcrc) {
				puts ("Bad Data CRC\n");
				SHOW_BOOT_PROGRESS (-12);
				do_reset (cmdtp, flag, argc, argv);
			}
			puts ("OK\n");
		}

		SHOW_BOOT_PROGRESS (11);

		if ((hdr->ih_os   != IH_OS_LINUX)	||
		    (hdr->ih_arch != IH_CPU_PPC)	||
		    (hdr->ih_type != IH_TYPE_RAMDISK)	) {
			puts ("No Linux PPC Ramdisk Image\n");
			SHOW_BOOT_PROGRESS (-13);
			do_reset (cmdtp, flag, argc, argv);
		}

		/*
		 * Now check if we have a multifile image
		 */
	} else if ((hdr->ih_type==IH_TYPE_MULTI) && (len_ptr[1])) {
		u_long tail    = ntohl(len_ptr[0]) % 4;
		int i;

		SHOW_BOOT_PROGRESS (13);

		/* skip kernel length and terminator */
		data = (ulong)(&len_ptr[2]);
		/* skip any additional image length fields */
		for (i=1; len_ptr[i]; ++i)
			data += 4;
		/* add kernel length, and align */
		data += ntohl(len_ptr[0]);
		if (tail) {
			data += 4 - tail;
		}

		len   = ntohl(len_ptr[1]);

	} else {
		/*
		 * no initrd image
		 */
		SHOW_BOOT_PROGRESS (14);

		len = data = 0;
	}

	if (!data) {
		debug ("No initrd\n");
	}

	if (data) {
	    if (!initrd_copy_to_ram) {	/* zero-copy ramdisk support */
		initrd_start = data;
		initrd_end = initrd_start + len;
	    } else {
		initrd_start  = (ulong)kbd - len;
		initrd_start &= ~(4096 - 1);	/* align on page */

		if (initrd_high) {
			ulong nsp;

			/*
			 * the inital ramdisk does not need to be within
			 * CFG_BOOTMAPSZ as it is not accessed until after
			 * the mm system is initialised.
			 *
			 * do the stack bottom calculation again and see if
			 * the initrd will fit just below the monitor stack
			 * bottom without overwriting the area allocated
			 * above for command line args and board info.
			 */
			asm( "mr %0,1": "=r"(nsp) : );
			nsp -= 2048;		/* just to be sure */
			nsp &= ~0xF;
			if (nsp > initrd_high)	/* limit as specified */
				nsp = initrd_high;
			nsp -= len;
			nsp &= ~(4096 - 1);	/* align on page */
			if (nsp >= sp)
				initrd_start = nsp;
		}

		SHOW_BOOT_PROGRESS (12);

		debug ("## initrd at 0x%08lX ... 0x%08lX (len=%ld=0x%lX)\n",
			data, data + len - 1, len, len);

		initrd_end    = initrd_start + len;
		printf ("   Loading Ramdisk to %08lx, end %08lx ... ",
			initrd_start, initrd_end);
#if defined(CONFIG_HW_WATCHDOG) || defined(CONFIG_WATCHDOG)
		{
			size_t l = len;
			void *to = (void *)initrd_start;
			void *from = (void *)data;

			while (l > 0) {
				size_t tail = (l > CHUNKSZ) ? CHUNKSZ : l;
				WATCHDOG_RESET();
				memmove (to, from, tail);
				to += tail;
				from += tail;
				l -= tail;
			}
		}
#else	/* !(CONFIG_HW_WATCHDOG || CONFIG_WATCHDOG) */
		memmove ((void *)initrd_start, (void *)data, len);
#endif	/* CONFIG_HW_WATCHDOG || CONFIG_WATCHDOG */
		puts ("OK\n");
	    }
	} else {
		initrd_start = 0;
		initrd_end = 0;
	}


	debug ("## Transferring control to Linux (at address %08lx) ...\n",
		(ulong)kernel);

	SHOW_BOOT_PROGRESS (15);

#if defined(CFG_INIT_RAM_LOCK) && !defined(CONFIG_E500)
	unlock_ram_in_cache();
#endif
	/*
	 * Linux Kernel Parameters:
	 *   r3: ptr to board info data
	 *   r4: initrd_start or 0 if no initrd
	 *   r5: initrd_end - unused if r4 is 0
	 *   r6: Start of command line string
	 *   r7: End   of command line string
	 */
	(*kernel) (kbd, initrd_start, initrd_end, cmd_start, cmd_end);
}
#endif /* CONFIG_PPC */

static void
do_bootm_netbsd (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	(*loader)(bd_t *, image_header_t *, char *, char *);
	image_header_t *img_addr;
	char     *consdev;
	char     *cmdline;


	/*
	 * Booting a (NetBSD) kernel image
	 *
	 * This process is pretty similar to a standalone application:
	 * The (first part of an multi-) image must be a stage-2 loader,
	 * which in turn is responsible for loading & invoking the actual
	 * kernel.  The only differences are the parameters being passed:
	 * besides the board info strucure, the loader expects a command
	 * line, the name of the console device, and (optionally) the
	 * address of the original image header.
	 */

	img_addr = 0;
	if ((hdr->ih_type==IH_TYPE_MULTI) && (len_ptr[1]))
		img_addr = (image_header_t *) addr;


	consdev = "";
#if   defined (CONFIG_8xx_CONS_SMC1)
	consdev = "smc1";
#elif defined (CONFIG_8xx_CONS_SMC2)
	consdev = "smc2";
#elif defined (CONFIG_8xx_CONS_SCC2)
	consdev = "scc2";
#elif defined (CONFIG_8xx_CONS_SCC3)
	consdev = "scc3";
#endif

	if (argc > 2) {
		ulong len;
		int   i;

		for (i=2, len=0 ; i<argc ; i+=1)
			len += strlen (argv[i]) + 1;
		cmdline = malloc (len);

		for (i=2, len=0 ; i<argc ; i+=1) {
			if (i > 2)
				cmdline[len++] = ' ';
			strcpy (&cmdline[len], argv[i]);
			len += strlen (argv[i]);
		}
	} else if ((cmdline = getenv("bootargs")) == NULL) {
		cmdline = "";
	}

	loader = (void (*)(bd_t *, image_header_t *, char *, char *)) hdr->ih_ep;

	printf ("## Transferring control to NetBSD stage-2 loader (at address %08lx) ...\n",
		(ulong)loader);

	SHOW_BOOT_PROGRESS (15);

	/*
	 * NetBSD Stage-2 Loader Parameters:
	 *   r3: ptr to board info data
	 *   r4: image address
	 *   r5: console device
	 *   r6: boot args string
	 */
	(*loader) (gd->bd, img_addr, consdev, cmdline);
}

#if defined(CONFIG_ARTOS) && defined(CONFIG_PPC)

/* Function that returns a character from the environment */
extern uchar (*env_get_char)(int);

static void
do_bootm_artos (cmd_tbl_t *cmdtp, int flag,
		int	argc, char *argv[],
		ulong	addr,
		ulong	*len_ptr,
		int	verify)
{
	DECLARE_GLOBAL_DATA_PTR;
	ulong top;
	char *s, *cmdline;
	char **fwenv, **ss;
	int i, j, nxt, len, envno, envsz;
	bd_t *kbd;
	void (*entry)(bd_t *bd, char *cmdline, char **fwenv, ulong top);
	image_header_t *hdr = &header;

	/*
	 * Booting an ARTOS kernel image + application
	 */

	/* this used to be the top of memory, but was wrong... */
#ifdef CONFIG_PPC
	/* get stack pointer */
	asm volatile ("mr %0,1" : "=r"(top) );
#endif
	debug ("## Current stack ends at 0x%08lX ", top);

	top -= 2048;		/* just to be sure */
	if (top > CFG_BOOTMAPSZ)
		top = CFG_BOOTMAPSZ;
	top &= ~0xF;

	debug ("=> set upper limit to 0x%08lX\n", top);

	/* first check the artos specific boot args, then the linux args*/
	if ((s = getenv("abootargs")) == NULL && (s = getenv("bootargs")) == NULL)
		s = "";

	/* get length of cmdline, and place it */