[people/ms/u-boot.git] / lib_ppc / ppc_linux.c

/*
 * (C) Copyright 2008 Semihalf
 *
 * (C) Copyright 2000-2006
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */

#include <common.h>
#include <watchdog.h>
#include <command.h>
#include <image.h>
#include <malloc.h>
#include <zlib.h>
#include <bzlib.h>
#include <environment.h>
#include <asm/byteorder.h>

#if defined(CONFIG_OF_LIBFDT)
#include <fdt.h>
#include <libfdt.h>
#include <fdt_support.h>
#elif defined(CONFIG_OF_FLAT_TREE)
#include <ft_build.h>
#endif

#ifdef CONFIG_LOGBUFFER
#include <logbuff.h>
#endif

#ifdef CFG_INIT_RAM_LOCK
#include <asm/cache.h>
#endif

DECLARE_GLOBAL_DATA_PTR;

extern int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);

#if defined(CONFIG_CMD_BDI)
extern int do_bdinfo(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
#endif

void  __attribute__((noinline))
do_bootm_linux(cmd_tbl_t *cmdtp, int flag,
		int	argc, char *argv[],
		image_header_t *hdr,
		int	verify)
{
	ulong	initrd_high;
	int	initrd_copy_to_ram = 1;
	ulong	initrd_start, initrd_end;
	ulong	rd_data, rd_len;
	image_header_t *rd_hdr;

	ulong	cmd_start, cmd_end;
	char    *cmdline;

	ulong	sp;
	char	*s;
	bd_t	*kbd;
	void	(*kernel)(bd_t *, ulong, ulong, ulong, ulong);

#if defined(CONFIG_OF_FLAT_TREE) || defined(CONFIG_OF_LIBFDT)
	image_header_t *fdt_hdr;
	char	*of_flat_tree = NULL;
	ulong	of_data = 0;
#endif

	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);

#if defined(CONFIG_CMD_BDI)
	do_bdinfo (NULL, 0, 0, NULL);
#endif
#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_MPC8220)
	kbd->bi_inpfreq /= 1000000L;
	kbd->bi_pcifreq /= 1000000L;
	kbd->bi_pevfreq /= 1000000L;
	kbd->bi_flbfreq /= 1000000L;
	kbd->bi_vcofreq /= 1000000L;
#endif
#if defined(CONFIG_CPM2)
		kbd->bi_cpmfreq /= 1000000L;
		kbd->bi_brgfreq /= 1000000L;
		kbd->bi_sccfreq /= 1000000L;
		kbd->bi_vco     /= 1000000L;
#endif
#if defined(CONFIG_MPC5xxx)
		kbd->bi_ipbfreq /= 1000000L;
		kbd->bi_pcifreq /= 1000000L;
#endif /* CONFIG_MPC5xxx */
	}

	kernel = (void (*)(bd_t *, ulong, ulong, ulong, ulong))image_get_ep (hdr);

	/*
	 * Check if there is an initrd image
	 */

#if defined(CONFIG_OF_FLAT_TREE) || defined(CONFIG_OF_LIBFDT)
	/* Look for a '-' which indicates to ignore the ramdisk argument */
	if (argc >= 3 && strcmp(argv[2], "-") ==  0) {
			debug ("Skipping initrd\n");
			rd_len = rd_data = 0;
		}
	else
#endif
	if (argc >= 3) {
		debug ("Not skipping initrd\n");
		show_boot_progress (9);

		rd_hdr = (image_header_t *)simple_strtoul (argv[2], NULL, 16);
		printf ("## Loading RAMDisk Image at %08lx ...\n", (ulong)rd_hdr);

		if (!image_check_magic (rd_hdr)) {
			puts ("Bad Magic Number\n");
			show_boot_progress (-10);
			do_reset (cmdtp, flag, argc, argv);
		}

		if (!image_check_hcrc (rd_hdr)) {
			puts ("Bad Header Checksum\n");
			show_boot_progress (-11);
			do_reset (cmdtp, flag, argc, argv);
		}
		show_boot_progress (10);

		print_image_hdr (rd_hdr);

		if (verify) {
			puts ("   Verifying Checksum ... ");

			if (!image_check_dcrc_wd (rd_hdr, CHUNKSZ)) {
				puts ("Bad Data CRC\n");
				show_boot_progress (-12);
				do_reset (cmdtp, flag, argc, argv);
			}
			puts ("OK\n");
		}

		show_boot_progress (11);

		if (!image_check_os (rd_hdr, IH_OS_LINUX) ||
		    !image_check_arch (rd_hdr, IH_ARCH_PPC) ||
		    !image_check_type (rd_hdr, IH_TYPE_RAMDISK)) {
			puts ("No Linux PPC Ramdisk Image\n");
			show_boot_progress (-13);
			do_reset (cmdtp, flag, argc, argv);
		}

		rd_data = image_get_data (rd_hdr);
		rd_len = image_get_data_size (rd_hdr);

		/*
		 * Now check if we have a multifile image
		 */
	} else if (image_check_type (hdr, IH_TYPE_MULTI)) {
		/*
		 * Get second entry data start address and len
		 */
		image_multi_getimg (hdr, 1, &rd_data, &rd_len);
		show_boot_progress (13);
	} else {
		/*
		 * No initrd image
		 */
		show_boot_progress (14);

		rd_len = rd_data = 0;
	}

#if defined(CONFIG_OF_FLAT_TREE) || defined(CONFIG_OF_LIBFDT)
	if(argc > 3) {
		of_flat_tree = (char *) simple_strtoul(argv[3], NULL, 16);
		fdt_hdr = (image_header_t *)of_flat_tree;
#if defined(CONFIG_OF_FLAT_TREE)
		if (*((ulong *)(of_flat_tree)) == OF_DT_HEADER) {
#elif defined(CONFIG_OF_LIBFDT)
		if (fdt_check_header (of_flat_tree) == 0) {
#endif
#ifndef CFG_NO_FLASH
			if (addr2info((ulong)of_flat_tree) != NULL)
				of_data = (ulong)of_flat_tree;
#endif
		} else if (image_check_magic (fdt_hdr)) {
			printf ("## Flat Device Tree at %08lX\n", fdt_hdr);
			print_image_hdr (fdt_hdr);

			if ((image_get_load (fdt_hdr) < image_get_image_end (fdt_hdr)) &&
			   ((image_get_load (fdt_hdr) + image_get_data_size (fdt_hdr)) > (unsigned long)fdt_hdr)) {
				puts ("ERROR: fdt overwritten - "
					"must RESET the board to recover.\n");
				do_reset (cmdtp, flag, argc, argv);
			}

			puts ("   Verifying Checksum ... ");
			if (!image_check_hcrc (fdt_hdr)) {
				puts ("ERROR: fdt header checksum invalid - "
					"must RESET the board to recover.\n");
				do_reset (cmdtp, flag, argc, argv);
			}

			if (!image_check_dcrc (fdt_hdr)) {
				puts ("ERROR: fdt checksum invalid - "
					"must RESET the board to recover.\n");
				do_reset (cmdtp, flag, argc, argv);
			}
			puts ("OK\n");

			if (!image_check_type (fdt_hdr, IH_TYPE_FLATDT)) {
				puts ("ERROR: uImage is not a fdt - "
					"must RESET the board to recover.\n");
				do_reset (cmdtp, flag, argc, argv);
			}
			if (image_get_comp (fdt_hdr) != IH_COMP_NONE) {
				puts ("ERROR: uImage is compressed - "
					"must RESET the board to recover.\n");
				do_reset (cmdtp, flag, argc, argv);
			}
#if defined(CONFIG_OF_FLAT_TREE)
			if (*((ulong *)(of_flat_tree + image_get_header_size ())) != OF_DT_HEADER) {
#elif defined(CONFIG_OF_LIBFDT)
			if (fdt_check_header (of_flat_tree + image_get_header_size ()) != 0) {
#endif
				puts ("ERROR: uImage data is not a fdt - "
					"must RESET the board to recover.\n");
				do_reset (cmdtp, flag, argc, argv);
			}

			memmove ((void *)image_get_load (fdt_hdr),
				(void *)(of_flat_tree + image_get_header_size ()),
				image_get_data_size (fdt_hdr));

			of_flat_tree = (char *)image_get_load (fdt_hdr);
		} else {
			puts ("Did not find a flat Flat Device Tree.\n"
				"Must RESET the board to recover.\n");
			do_reset (cmdtp, flag, argc, argv);
		}
		printf ("   Booting using the fdt at 0x%x\n",
				of_flat_tree);
	} else if (image_check_type (hdr, IH_TYPE_MULTI)) {
		ulong fdt_data, fdt_len;

		image_multi_getimg (hdr, 2, &fdt_data, &fdt_len);
		if (fdt_len) {

			of_flat_tree = (char *)fdt_data;

#ifndef CFG_NO_FLASH
			/* move the blob if it is in flash (set of_data to !null) */
			if (addr2info ((ulong)of_flat_tree) != NULL)
				of_data = (ulong)of_flat_tree;
#endif

#if defined(CONFIG_OF_FLAT_TREE)
			if (*((ulong *)(of_flat_tree)) != OF_DT_HEADER) {
#elif defined(CONFIG_OF_LIBFDT)
			if (fdt_check_header (of_flat_tree) != 0) {
#endif
				puts ("ERROR: image is not a fdt - "
					"must RESET the board to recover.\n");
				do_reset (cmdtp, flag, argc, argv);
			}

#if defined(CONFIG_OF_FLAT_TREE)
			if (((struct boot_param_header *)of_flat_tree)->totalsize != fdt_len) {
#elif defined(CONFIG_OF_LIBFDT)
			if (be32_to_cpu (fdt_totalsize (of_flat_tree)) != fdt_len) {
#endif
				puts ("ERROR: fdt size != image size - "
					"must RESET the board to recover.\n");
				do_reset (cmdtp, flag, argc, argv);
			}
		}
	}
#endif
	if (!rd_data) {
		debug ("No initrd\n");
	}

	if (rd_data) {
	    if (!initrd_copy_to_ram) {	/* zero-copy ramdisk support */
		initrd_start = rd_data;
		initrd_end = initrd_start + rd_len;
	    } else {
		initrd_start  = (ulong)kbd - rd_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 -= rd_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",
			rd_data, rd_data + rd_len - 1, rd_len, rd_len);

		initrd_end    = initrd_start + rd_len;
		printf ("   Loading Ramdisk to %08lx, end %08lx ... ",
			initrd_start, initrd_end);

		memmove_wd((void *)initrd_start,
			   (void *)rd_data, rd_len, CHUNKSZ);

		puts ("OK\n");
	    }
	} else {
		initrd_start = 0;
		initrd_end = 0;
	}

#if defined(CONFIG_OF_LIBFDT)

#ifdef CFG_BOOTMAPSZ
	/*
	 * The blob must be within CFG_BOOTMAPSZ,
	 * so we flag it to be copied if it is not.
	 */
	if (of_flat_tree >= (char *)CFG_BOOTMAPSZ)
		of_data = (ulong)of_flat_tree;
#endif

	/* move of_flat_tree if needed */
	if (of_data) {
		int err;
		ulong of_start, of_len;

		of_len = be32_to_cpu(fdt_totalsize(of_data));

		/* position on a 4K boundary before the kbd */
		of_start  = (ulong)kbd - of_len;
		of_start &= ~(4096 - 1);	/* align on page */
		debug ("## device tree at 0x%08lX ... 0x%08lX (len=%ld=0x%lX)\n",
			of_data, of_data + of_len - 1, of_len, of_len);

		of_flat_tree = (char *)of_start;
		printf ("   Loading Device Tree to %08lx, end %08lx ... ",
			of_start, of_start + of_len - 1);
		err = fdt_open_into((void *)of_data, (void *)of_start, of_len);
		if (err != 0) {
			puts ("ERROR: fdt move failed - "
				"must RESET the board to recover.\n");
			do_reset (cmdtp, flag, argc, argv);
		}
		puts ("OK\n");
	}
	/*
	 * Add the chosen node if it doesn't exist, add the env and bd_t
	 * if the user wants it (the logic is in the subroutines).
	 */
	if (of_flat_tree) {
		if (fdt_chosen(of_flat_tree, initrd_start, initrd_end, 0) < 0) {
			puts ("ERROR: /chosen node create failed - "
				"must RESET the board to recover.\n");
			do_reset (cmdtp, flag, argc, argv);
		}
#ifdef CONFIG_OF_HAS_UBOOT_ENV
		if (fdt_env(of_flat_tree) < 0) {
			puts ("ERROR: /u-boot-env node create failed - "
				"must RESET the board to recover.\n");
			do_reset (cmdtp, flag, argc, argv);
		}
#endif
#ifdef CONFIG_OF_HAS_BD_T
		if (fdt_bd_t(of_flat_tree) < 0) {
			puts ("ERROR: /bd_t node create failed - "
				"must RESET the board to recover.\n");
			do_reset (cmdtp, flag, argc, argv);
		}
#endif
#ifdef CONFIG_OF_BOARD_SETUP
		/* Call the board-specific fixup routine */
		ft_board_setup(of_flat_tree, gd->bd);
#endif
	}

#elif defined(CONFIG_OF_FLAT_TREE)

#ifdef CFG_BOOTMAPSZ
	/*
	 * The blob must be within CFG_BOOTMAPSZ,
	 * so we flag it to be copied if it is not.
	 */
	if (of_flat_tree >= (char *)CFG_BOOTMAPSZ)
		of_data = (ulong)of_flat_tree;
#endif

	/* move of_flat_tree if needed */
	if (of_data) {
		ulong of_start, of_len;
		of_len = ((struct boot_param_header *)of_data)->totalsize;

		/* provide extra 8k pad */
		of_start  = (ulong)kbd - of_len - 8192;
		of_start &= ~(4096 - 1);	/* align on page */
		debug ("## device tree at 0x%08lX ... 0x%08lX (len=%ld=0x%lX)\n",
			of_data, of_data + of_len - 1, of_len, of_len);

		of_flat_tree = (char *)of_start;
		printf ("   Loading Device Tree to %08lx, end %08lx ... ",
			of_start, of_start + of_len - 1);
		memmove ((void *)of_start, (void *)of_data, of_len);
		puts ("OK\n");
	}
	/*
	 * Create the /chosen node and modify the blob with board specific
	 * values as needed.
	 */
	ft_setup(of_flat_tree, kbd, initrd_start, initrd_end);
	/* ft_dump_blob(of_flat_tree); */

#endif	/* #if defined(CONFIG_OF_LIBFDT) #elif defined(CONFIG_OF_FLAT_TREE) */

	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

#if defined(CONFIG_OF_FLAT_TREE) || defined(CONFIG_OF_LIBFDT)
	if (of_flat_tree) {	/* device tree; boot new style */
		/*
		 * Linux Kernel Parameters (passing device tree):
		 *   r3: pointer to the fdt, followed by the board info data
		 *   r4: physical pointer to the kernel itself
		 *   r5: NULL
		 *   r6: NULL
		 *   r7: NULL
		 */
		(*kernel) ((bd_t *)of_flat_tree, (ulong)kernel, 0, 0, 0);
		/* does not return */
	}
#endif
	/*
	 * Linux Kernel Parameters (passing board info data):
	 *   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);
	/* does not return */
}
Commit	Line	Data
5d3cc55e MB	1	/*
	2	* (C) Copyright 2008 Semihalf
	3	*
	4	* (C) Copyright 2000-2006
	5	* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
	6	*
	7	* See file CREDITS for list of people who contributed to this
	8	* project.
	9	*
	10	* This program is free software; you can redistribute it and/or
	11	* modify it under the terms of the GNU General Public License as
	12	* published by the Free Software Foundation; either version 2 of
	13	* the License, or (at your option) any later version.
	14	*
	15	* This program is distributed in the hope that it will be useful,
	16	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	17	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	18	* GNU General Public License for more details.
	19	*
	20	* You should have received a copy of the GNU General Public License
	21	* along with this program; if not, write to the Free Software
	22	* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
	23	* MA 02111-1307 USA
	24	*/
	25
	26	#include <common.h>
	27	#include <watchdog.h>
	28	#include <command.h>
	29	#include <image.h>
	30	#include <malloc.h>
	31	#include <zlib.h>
	32	#include <bzlib.h>
	33	#include <environment.h>
	34	#include <asm/byteorder.h>
	35
	36	#if defined(CONFIG_OF_LIBFDT)
	37	#include <fdt.h>
	38	#include <libfdt.h>
	39	#include <fdt_support.h>
d45d5a18	40	#elif defined(CONFIG_OF_FLAT_TREE)
5d3cc55e MB	41	#include <ft_build.h>
	42	#endif
	43
	44	#ifdef CONFIG_LOGBUFFER
	45	#include <logbuff.h>
	46	#endif
	47
	48	#ifdef CFG_INIT_RAM_LOCK
	49	#include <asm/cache.h>
	50	#endif
	51
5d3cc55e	52	DECLARE_GLOBAL_DATA_PTR;
5d3cc55e	53
5d3cc55e MB	54	extern int do_reset (cmd_tbl_t cmdtp, int flag, int argc, char argv[]);
	55
	56	#if defined(CONFIG_CMD_BDI)
	57	extern int do_bdinfo(cmd_tbl_t cmdtp, int flag, int argc, char argv[]);
	58	#endif
	59
	60	void __attribute__((noinline))
f13e7b2e	61	do_bootm_linux(cmd_tbl_t *cmdtp, int flag,
5d3cc55e	62	int argc, char *argv[],
f13e7b2e	63	image_header_t *hdr,
5d3cc55e MB	64	int verify)
5d3cc55e MB	65	{
5d3cc55e	66	ulong initrd_high;
5d3cc55e	67	int initrd_copy_to_ram = 1;
f13e7b2e MB	68	ulong initrd_start, initrd_end;
	69	ulong rd_data, rd_len;
	70	image_header_t *rd_hdr;
	71
	72	ulong cmd_start, cmd_end;
5d3cc55e	73	char *cmdline;
f13e7b2e MB	74
f13e7b2e MB	75	ulong sp;
5d3cc55e MB	76	char *s;
	77	bd_t *kbd;
	78	void (kernel)(bd_t , ulong, ulong, ulong, ulong);
f13e7b2e	79
5d3cc55e	80	#if defined(CONFIG_OF_FLAT_TREE) \|\| defined(CONFIG_OF_LIBFDT)
f13e7b2e	81	image_header_t *fdt_hdr;
5d3cc55e MB	82	char *of_flat_tree = NULL;
	83	ulong of_data = 0;
	84	#endif
	85
	86	if ((s = getenv ("initrd_high")) != NULL) {
	87	/* a value of "no" or a similar string will act like 0,
	88	* turning the "load high" feature off. This is intentional.
	89	*/
	90	initrd_high = simple_strtoul(s, NULL, 16);
	91	if (initrd_high == ~0)
	92	initrd_copy_to_ram = 0;
	93	} else { /* not set, no restrictions to load high */
	94	initrd_high = ~0;
	95	}
	96
	97	#ifdef CONFIG_LOGBUFFER
	98	kbd=gd->bd;
	99	/* Prevent initrd from overwriting logbuffer */
	100	if (initrd_high < (kbd->bi_memsize-LOGBUFF_LEN-LOGBUFF_OVERHEAD))
	101	initrd_high = kbd->bi_memsize-LOGBUFF_LEN-LOGBUFF_OVERHEAD;
	102	debug ("## Logbuffer at 0x%08lX ", kbd->bi_memsize-LOGBUFF_LEN);
	103	#endif
	104
	105	/*
	106	* Booting a (Linux) kernel image
	107	*
	108	* Allocate space for command line and board info - the
	109	* address should be as high as possible within the reach of
	110	* the kernel (see CFG_BOOTMAPSZ settings), but in unused
	111	* memory, which means far enough below the current stack
	112	* pointer.
	113	*/
	114
	115	asm( "mr %0,1": "=r"(sp) : );
	116
	117	debug ("## Current stack ends at 0x%08lX ", sp);
	118
	119	sp -= 2048; /* just to be sure */
	120	if (sp > CFG_BOOTMAPSZ)
	121	sp = CFG_BOOTMAPSZ;
	122	sp &= ~0xF;
	123
	124	debug ("=> set upper limit to 0x%08lX\n", sp);
	125
	126	cmdline = (char *)((sp - CFG_BARGSIZE) & ~0xF);
	127	kbd = (bd_t *)(((ulong)cmdline - sizeof(bd_t)) & ~0xF);
	128
	129	if ((s = getenv("bootargs")) == NULL)
	130	s = "";
	131
	132	strcpy (cmdline, s);
	133
	134	cmd_start = (ulong)&cmdline[0];
	135	cmd_end = cmd_start + strlen(cmdline);
	136
	137	kbd = (gd->bd);
	138
	139	#ifdef DEBUG
	140	printf ("## cmdline at 0x%08lX ... 0x%08lX\n", cmd_start, cmd_end);
	141
	142	#if defined(CONFIG_CMD_BDI)
	143	do_bdinfo (NULL, 0, 0, NULL);
	144	#endif
	145	#endif
146
147	if ((s = getenv ("clocks_in_mhz")) != NULL) {
148	/* convert all clock information to MHz */
149	kbd->bi_intfreq /= 1000000L;
150	kbd->bi_busfreq /= 1000000L;
151	#if defined(CONFIG_MPC8220)
152	kbd->bi_inpfreq /= 1000000L;
153	kbd->bi_pcifreq /= 1000000L;
154	kbd->bi_pevfreq /= 1000000L;
155	kbd->bi_flbfreq /= 1000000L;
156	kbd->bi_vcofreq /= 1000000L;
157	#endif
158	#if defined(CONFIG_CPM2)
159	kbd->bi_cpmfreq /= 1000000L;
160	kbd->bi_brgfreq /= 1000000L;
161	kbd->bi_sccfreq /= 1000000L;
162	kbd->bi_vco /= 1000000L;
163	#endif
164	#if defined(CONFIG_MPC5xxx)
165	kbd->bi_ipbfreq /= 1000000L;
166	kbd->bi_pcifreq /= 1000000L;
167	#endif /* CONFIG_MPC5xxx */
168	}
169
170	kernel = (void ()(bd_t , ulong, ulong, ulong, ulong))image_get_ep (hdr);
171
172	/*
173	* Check if there is an initrd image
174	*/
175
176	#if defined(CONFIG_OF_FLAT_TREE) \|\| defined(CONFIG_OF_LIBFDT)
177	/* Look for a '-' which indicates to ignore the ramdisk argument */
178	if (argc >= 3 && strcmp(argv[2], "-") == 0) {
179	debug ("Skipping initrd\n");
f13e7b2e	180	rd_len = rd_data = 0;
5d3cc55e MB	181	}
	182	else
	183	#endif
	184	if (argc >= 3) {
	185	debug ("Not skipping initrd\n");
	186	show_boot_progress (9);
	187
f13e7b2e MB	188	rd_hdr = (image_header_t *)simple_strtoul (argv[2], NULL, 16);
f13e7b2e MB	189	printf ("## Loading RAMDisk Image at %08lx ...\n", (ulong)rd_hdr);
5d3cc55e	190
f13e7b2e	191	if (!image_check_magic (rd_hdr)) {
5d3cc55e MB	192	puts ("Bad Magic Number\n");
	193	show_boot_progress (-10);
	194	do_reset (cmdtp, flag, argc, argv);
	195	}
	196
f13e7b2e	197	if (!image_check_hcrc (rd_hdr)) {
5d3cc55e MB	198	puts ("Bad Header Checksum\n");
	199	show_boot_progress (-11);
	200	do_reset (cmdtp, flag, argc, argv);
	201	}
	202	show_boot_progress (10);
	203
f13e7b2e	204	print_image_hdr (rd_hdr);
5d3cc55e MB	205
	206	if (verify) {
	207	puts (" Verifying Checksum ... ");
	208
f13e7b2e	209	if (!image_check_dcrc_wd (rd_hdr, CHUNKSZ)) {
5d3cc55e MB	210	puts ("Bad Data CRC\n");
	211	show_boot_progress (-12);
	212	do_reset (cmdtp, flag, argc, argv);
	213	}
	214	puts ("OK\n");
	215	}
	216
	217	show_boot_progress (11);
	218
f13e7b2e MB	219	if (!image_check_os (rd_hdr, IH_OS_LINUX) \|\|
	220	!image_check_arch (rd_hdr, IH_ARCH_PPC) \|\|
	221	!image_check_type (rd_hdr, IH_TYPE_RAMDISK)) {
5d3cc55e MB	222	puts ("No Linux PPC Ramdisk Image\n");
	223	show_boot_progress (-13);
	224	do_reset (cmdtp, flag, argc, argv);
	225	}
	226
f13e7b2e MB	227	rd_data = image_get_data (rd_hdr);
f13e7b2e MB	228	rd_len = image_get_data_size (rd_hdr);
5d3cc55e MB	229
	230	/*
	231	* Now check if we have a multifile image
	232	*/
f13e7b2e MB	233	} else if (image_check_type (hdr, IH_TYPE_MULTI)) {
	234	/*
	235	* Get second entry data start address and len
	236	*/
	237	image_multi_getimg (hdr, 1, &rd_data, &rd_len);
5d3cc55e	238	show_boot_progress (13);
5d3cc55e MB	239	} else {
5d3cc55e MB	240	/*
f13e7b2e	241	* No initrd image
5d3cc55e MB	242	*/
	243	show_boot_progress (14);
	244
f13e7b2e	245	rd_len = rd_data = 0;
5d3cc55e MB	246	}
	247
	248	#if defined(CONFIG_OF_FLAT_TREE) \|\| defined(CONFIG_OF_LIBFDT)
	249	if(argc > 3) {
	250	of_flat_tree = (char *) simple_strtoul(argv[3], NULL, 16);
f13e7b2e	251	fdt_hdr = (image_header_t *)of_flat_tree;
5d3cc55e	252	#if defined(CONFIG_OF_FLAT_TREE)
958fc48a	253	if (((ulong )(of_flat_tree)) == OF_DT_HEADER) {
d45d5a18	254	#elif defined(CONFIG_OF_LIBFDT)
958fc48a	255	if (fdt_check_header (of_flat_tree) == 0) {
5d3cc55e MB	256	#endif
	257	#ifndef CFG_NO_FLASH
	258	if (addr2info((ulong)of_flat_tree) != NULL)
	259	of_data = (ulong)of_flat_tree;
	260	#endif
f13e7b2e MB	261	} else if (image_check_magic (fdt_hdr)) {
	262	printf ("## Flat Device Tree at %08lX\n", fdt_hdr);
	263	print_image_hdr (fdt_hdr);
5d3cc55e	264
f13e7b2e MB	265	if ((image_get_load (fdt_hdr) < image_get_image_end (fdt_hdr)) &&
f13e7b2e MB	266	((image_get_load (fdt_hdr) + image_get_data_size (fdt_hdr)) > (unsigned long)fdt_hdr)) {
5d3cc55e MB	267	puts ("ERROR: fdt overwritten - "
	268	"must RESET the board to recover.\n");
	269	do_reset (cmdtp, flag, argc, argv);
	270	}
	271
	272	puts (" Verifying Checksum ... ");
f13e7b2e	273	if (!image_check_hcrc (fdt_hdr)) {
5d3cc55e MB	274	puts ("ERROR: fdt header checksum invalid - "
	275	"must RESET the board to recover.\n");
	276	do_reset (cmdtp, flag, argc, argv);
	277	}
	278
f13e7b2e	279	if (!image_check_dcrc (fdt_hdr)) {
5d3cc55e MB	280	puts ("ERROR: fdt checksum invalid - "
	281	"must RESET the board to recover.\n");
	282	do_reset (cmdtp, flag, argc, argv);
	283	}
	284	puts ("OK\n");
	285
f13e7b2e	286	if (!image_check_type (fdt_hdr, IH_TYPE_FLATDT)) {
5d3cc55e MB	287	puts ("ERROR: uImage is not a fdt - "
	288	"must RESET the board to recover.\n");
	289	do_reset (cmdtp, flag, argc, argv);
	290	}
f13e7b2e	291	if (image_get_comp (fdt_hdr) != IH_COMP_NONE) {
5d3cc55e MB	292	puts ("ERROR: uImage is compressed - "
	293	"must RESET the board to recover.\n");
	294	do_reset (cmdtp, flag, argc, argv);
	295	}
	296	#if defined(CONFIG_OF_FLAT_TREE)
	297	if (((ulong )(of_flat_tree + image_get_header_size ())) != OF_DT_HEADER) {
d45d5a18	298	#elif defined(CONFIG_OF_LIBFDT)
5d3cc55e MB	299	if (fdt_check_header (of_flat_tree + image_get_header_size ()) != 0) {
	300	#endif
	301	puts ("ERROR: uImage data is not a fdt - "
	302	"must RESET the board to recover.\n");
	303	do_reset (cmdtp, flag, argc, argv);
	304	}
	305
f13e7b2e	306	memmove ((void *)image_get_load (fdt_hdr),
5d3cc55e	307	(void *)(of_flat_tree + image_get_header_size ()),
f13e7b2e	308	image_get_data_size (fdt_hdr));
5d3cc55e	309
f13e7b2e	310	of_flat_tree = (char *)image_get_load (fdt_hdr);
5d3cc55e MB	311	} else {
	312	puts ("Did not find a flat Flat Device Tree.\n"
	313	"Must RESET the board to recover.\n");
	314	do_reset (cmdtp, flag, argc, argv);
	315	}
	316	printf (" Booting using the fdt at 0x%x\n",
	317	of_flat_tree);
f13e7b2e MB	318	} else if (image_check_type (hdr, IH_TYPE_MULTI)) {
f13e7b2e MB	319	ulong fdt_data, fdt_len;
5d3cc55e	320
f13e7b2e MB	321	image_multi_getimg (hdr, 2, &fdt_data, &fdt_len);
	322	if (fdt_len) {
	323
	324	of_flat_tree = (char *)fdt_data;
5d3cc55e MB	325
5d3cc55e MB	326	#ifndef CFG_NO_FLASH
f13e7b2e MB	327	/* move the blob if it is in flash (set of_data to !null) */
	328	if (addr2info ((ulong)of_flat_tree) != NULL)
	329	of_data = (ulong)of_flat_tree;
5d3cc55e MB	330	#endif
5d3cc55e MB	331
5d3cc55e	332	#if defined(CONFIG_OF_FLAT_TREE)
f13e7b2e	333	if (((ulong )(of_flat_tree)) != OF_DT_HEADER) {
d45d5a18	334	#elif defined(CONFIG_OF_LIBFDT)
f13e7b2e	335	if (fdt_check_header (of_flat_tree) != 0) {
5d3cc55e	336	#endif
f13e7b2e MB	337	puts ("ERROR: image is not a fdt - "
	338	"must RESET the board to recover.\n");
	339	do_reset (cmdtp, flag, argc, argv);
	340	}
5d3cc55e MB	341
5d3cc55e MB	342	#if defined(CONFIG_OF_FLAT_TREE)
f13e7b2e	343	if (((struct boot_param_header *)of_flat_tree)->totalsize != fdt_len) {
d45d5a18	344	#elif defined(CONFIG_OF_LIBFDT)
f13e7b2e	345	if (be32_to_cpu (fdt_totalsize (of_flat_tree)) != fdt_len) {
5d3cc55e	346	#endif
f13e7b2e MB	347	puts ("ERROR: fdt size != image size - "
	348	"must RESET the board to recover.\n");
	349	do_reset (cmdtp, flag, argc, argv);
	350	}
5d3cc55e MB	351	}
	352	}
	353	#endif
f13e7b2e	354	if (!rd_data) {
5d3cc55e MB	355	debug ("No initrd\n");
	356	}
	357
f13e7b2e	358	if (rd_data) {
5d3cc55e	359	if (!initrd_copy_to_ram) { /* zero-copy ramdisk support */
f13e7b2e MB	360	initrd_start = rd_data;
f13e7b2e MB	361	initrd_end = initrd_start + rd_len;
5d3cc55e	362	} else {
f13e7b2e	363	initrd_start = (ulong)kbd - rd_len;
5d3cc55e MB	364	initrd_start &= ~(4096 - 1); /* align on page */
	365
	366	if (initrd_high) {
	367	ulong nsp;
	368
	369	/*
	370	* the inital ramdisk does not need to be within
	371	* CFG_BOOTMAPSZ as it is not accessed until after
	372	* the mm system is initialised.
	373	*
	374	* do the stack bottom calculation again and see if
	375	* the initrd will fit just below the monitor stack
	376	* bottom without overwriting the area allocated
	377	* above for command line args and board info.
	378	*/
	379	asm( "mr %0,1": "=r"(nsp) : );
	380	nsp -= 2048; /* just to be sure */
	381	nsp &= ~0xF;
	382	if (nsp > initrd_high) /* limit as specified */
	383	nsp = initrd_high;
f13e7b2e	384	nsp -= rd_len;
5d3cc55e MB	385	nsp &= ~(4096 - 1); /* align on page */
	386	if (nsp >= sp)
	387	initrd_start = nsp;
	388	}
	389
	390	show_boot_progress (12);
	391
	392	debug ("## initrd at 0x%08lX ... 0x%08lX (len=%ld=0x%lX)\n",
f13e7b2e	393	rd_data, rd_data + rd_len - 1, rd_len, rd_len);
5d3cc55e	394
f13e7b2e	395	initrd_end = initrd_start + rd_len;
5d3cc55e MB	396	printf (" Loading Ramdisk to %08lx, end %08lx ... ",
5d3cc55e MB	397	initrd_start, initrd_end);
af13cdbc MB	398
af13cdbc MB	399	memmove_wd((void *)initrd_start,
f13e7b2e	400	(void *)rd_data, rd_len, CHUNKSZ);
af13cdbc	401
5d3cc55e MB	402	puts ("OK\n");
	403	}
	404	} else {
	405	initrd_start = 0;
	406	initrd_end = 0;
	407	}
	408
	409	#if defined(CONFIG_OF_LIBFDT)
	410
	411	#ifdef CFG_BOOTMAPSZ
	412	/*
	413	* The blob must be within CFG_BOOTMAPSZ,
	414	* so we flag it to be copied if it is not.
	415	*/
	416	if (of_flat_tree >= (char *)CFG_BOOTMAPSZ)
	417	of_data = (ulong)of_flat_tree;
	418	#endif
	419
	420	/* move of_flat_tree if needed */
	421	if (of_data) {
	422	int err;
	423	ulong of_start, of_len;
	424
	425	of_len = be32_to_cpu(fdt_totalsize(of_data));
	426
	427	/* position on a 4K boundary before the kbd */
	428	of_start = (ulong)kbd - of_len;
	429	of_start &= ~(4096 - 1); /* align on page */
	430	debug ("## device tree at 0x%08lX ... 0x%08lX (len=%ld=0x%lX)\n",
	431	of_data, of_data + of_len - 1, of_len, of_len);
	432
	433	of_flat_tree = (char *)of_start;
	434	printf (" Loading Device Tree to %08lx, end %08lx ... ",
	435	of_start, of_start + of_len - 1);
	436	err = fdt_open_into((void )of_data, (void )of_start, of_len);
	437	if (err != 0) {
	438	puts ("ERROR: fdt move failed - "
	439	"must RESET the board to recover.\n");
	440	do_reset (cmdtp, flag, argc, argv);
	441	}
	442	puts ("OK\n");
	443	}
	444	/*
	445	* Add the chosen node if it doesn't exist, add the env and bd_t
	446	* if the user wants it (the logic is in the subroutines).
	447	*/
	448	if (of_flat_tree) {
	449	if (fdt_chosen(of_flat_tree, initrd_start, initrd_end, 0) < 0) {
	450	puts ("ERROR: /chosen node create failed - "
	451	"must RESET the board to recover.\n");
	452	do_reset (cmdtp, flag, argc, argv);
	453	}
	454	#ifdef CONFIG_OF_HAS_UBOOT_ENV
	455	if (fdt_env(of_flat_tree) < 0) {
	456	puts ("ERROR: /u-boot-env node create failed - "
	457	"must RESET the board to recover.\n");
	458	do_reset (cmdtp, flag, argc, argv);
	459	}
	460	#endif
	461	#ifdef CONFIG_OF_HAS_BD_T
	462	if (fdt_bd_t(of_flat_tree) < 0) {
	463	puts ("ERROR: /bd_t node create failed - "
	464	"must RESET the board to recover.\n");
	465	do_reset (cmdtp, flag, argc, argv);
466	}
467	#endif
468	#ifdef CONFIG_OF_BOARD_SETUP
469	/* Call the board-specific fixup routine */
470	ft_board_setup(of_flat_tree, gd->bd);
471	#endif
472	}
d45d5a18 MB	473
	474	#elif defined(CONFIG_OF_FLAT_TREE)
	475
5d3cc55e MB	476	#ifdef CFG_BOOTMAPSZ
	477	/*
	478	* The blob must be within CFG_BOOTMAPSZ,
	479	* so we flag it to be copied if it is not.
	480	*/
	481	if (of_flat_tree >= (char *)CFG_BOOTMAPSZ)
	482	of_data = (ulong)of_flat_tree;
	483	#endif
	484
	485	/* move of_flat_tree if needed */
	486	if (of_data) {
	487	ulong of_start, of_len;
	488	of_len = ((struct boot_param_header *)of_data)->totalsize;
	489
	490	/* provide extra 8k pad */
	491	of_start = (ulong)kbd - of_len - 8192;
	492	of_start &= ~(4096 - 1); /* align on page */
	493	debug ("## device tree at 0x%08lX ... 0x%08lX (len=%ld=0x%lX)\n",
	494	of_data, of_data + of_len - 1, of_len, of_len);
	495
	496	of_flat_tree = (char *)of_start;
	497	printf (" Loading Device Tree to %08lx, end %08lx ... ",
	498	of_start, of_start + of_len - 1);
	499	memmove ((void )of_start, (void )of_data, of_len);
	500	puts ("OK\n");
	501	}
	502	/*
	503	* Create the /chosen node and modify the blob with board specific
	504	* values as needed.
	505	*/
	506	ft_setup(of_flat_tree, kbd, initrd_start, initrd_end);
	507	/* ft_dump_blob(of_flat_tree); */
d45d5a18 MB	508
	509	#endif /* #if defined(CONFIG_OF_LIBFDT) #elif defined(CONFIG_OF_FLAT_TREE) */
	510
5d3cc55e MB	511	debug ("## Transferring control to Linux (at address %08lx) ...\n",
	512	(ulong)kernel);
	513
	514	show_boot_progress (15);
	515
	516	#if defined(CFG_INIT_RAM_LOCK) && !defined(CONFIG_E500)
	517	unlock_ram_in_cache();
	518	#endif
	519
	520	#if defined(CONFIG_OF_FLAT_TREE) \|\| defined(CONFIG_OF_LIBFDT)
	521	if (of_flat_tree) { /* device tree; boot new style */
	522	/*
	523	* Linux Kernel Parameters (passing device tree):
	524	* r3: pointer to the fdt, followed by the board info data
	525	* r4: physical pointer to the kernel itself
	526	* r5: NULL
	527	* r6: NULL
	528	* r7: NULL
	529	*/
	530	(kernel) ((bd_t )of_flat_tree, (ulong)kernel, 0, 0, 0);
	531	/* does not return */
	532	}
	533	#endif
	534	/*
	535	* Linux Kernel Parameters (passing board info data):
	536	* r3: ptr to board info data
	537	* r4: initrd_start or 0 if no initrd
	538	* r5: initrd_end - unused if r4 is 0
	539	* r6: Start of command line string
	540	* r7: End of command line string
	541	*/
	542	(*kernel) (kbd, initrd_start, initrd_end, cmd_start, cmd_end);
	543	/* does not return */
	544	}