[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 image_header_t header;

/*cmd_boot.c*/
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[],
		ulong	addr,
		ulong	*len_ptr,
		int	verify)
{
	ulong	sp;
	ulong	len;
	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 defined(CONFIG_OF_FLAT_TREE) || defined(CONFIG_OF_LIBFDT)
	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");
			len = data = 0;
		}
	else
#endif
	if (argc >= 3) {
		debug ("Not skipping initrd\n");
		show_boot_progress (9);

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

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

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

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

		print_image_hdr (hdr);

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

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

		data = image_get_data (hdr);
		len = image_get_data_size (hdr);

		/*
		 * Now check if we have a multifile image
		 */
	} else if (image_check_type (hdr, IH_TYPE_MULTI) && (len_ptr[1])) {
		u_long tail    = image_to_cpu (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 += image_to_cpu (len_ptr[0]);
		if (tail) {
			data += 4 - tail;
		}

		len   = image_to_cpu (len_ptr[1]);

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

		len = 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);
		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 (hdr)) {
			printf("## Flat Device Tree at %08lX\n", hdr);
			print_image_hdr (hdr);

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

			if (!image_check_dcrc (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 (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 (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 (hdr),
				(void *)(of_flat_tree + image_get_header_size ()),
				image_get_data_size (hdr));

			of_flat_tree = (char *)image_get_load (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) && (len_ptr[1]) && (len_ptr[2])) {
		u_long tail    = image_to_cpu (len_ptr[0]) % 4;
		int i;

		/* skip kernel length, initrd length, and terminator */
		of_flat_tree = (char *)(&len_ptr[3]);
		/* skip any additional image length fields */
		for (i=2; len_ptr[i]; ++i)
			of_flat_tree += 4;
		/* add kernel length, and align */
		of_flat_tree += image_to_cpu (len_ptr[0]);
		if (tail) {
			of_flat_tree += 4 - tail;
		}

		/* add initrd length, and align */
		tail = image_to_cpu (len_ptr[1]) % 4;
		of_flat_tree += image_to_cpu (len_ptr[1]);
		if (tail) {
			of_flat_tree += 4 - tail;
		}

#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 !=
			image_to_cpu (len_ptr[2])) {
#elif defined(CONFIG_OF_LIBFDT)
		if (be32_to_cpu (fdt_totalsize (of_flat_tree)) !=
			image_to_cpu (len_ptr[2])) {
#endif
			puts ("ERROR: fdt size != image size - "
				"must RESET the board to recover.\n");
			do_reset (cmdtp, flag, argc, argv);
		}
	}
#endif
	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);

		memmove_wd((void *)initrd_start,
			   (void *)data, 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 MB	52	DECLARE_GLOBAL_DATA_PTR;
	53	extern image_header_t header;
	54
	55	/cmd_boot.c/
	56	extern int do_reset (cmd_tbl_t cmdtp, int flag, int argc, char argv[]);
	57
	58	#if defined(CONFIG_CMD_BDI)
	59	extern int do_bdinfo(cmd_tbl_t cmdtp, int flag, int argc, char argv[]);
	60	#endif
	61
	62	void __attribute__((noinline))
	63	do_bootm_linux (cmd_tbl_t *cmdtp, int flag,
	64	int argc, char *argv[],
	65	ulong addr,
	66	ulong *len_ptr,
	67	int verify)
	68	{
	69	ulong sp;
	70	ulong len;
	71	ulong initrd_start, initrd_end;
	72	ulong cmd_start, cmd_end;
	73	ulong initrd_high;
	74	ulong data;
	75	int initrd_copy_to_ram = 1;
	76	char *cmdline;
	77	char *s;
	78	bd_t *kbd;
	79	void (kernel)(bd_t , ulong, ulong, ulong, ulong);
	80	image_header_t *hdr = &header;
	81	#if defined(CONFIG_OF_FLAT_TREE) \|\| defined(CONFIG_OF_LIBFDT)
	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");
180	len = data = 0;
181	}
182	else
183	#endif
184	if (argc >= 3) {
185	debug ("Not skipping initrd\n");
186	show_boot_progress (9);
187
188	addr = simple_strtoul(argv[2], NULL, 16);
189
190	printf ("## Loading RAMDisk Image at %08lx ...\n", addr);
191	hdr = (image_header_t *)addr;
192
193	if (!image_check_magic (hdr)) {
194	puts ("Bad Magic Number\n");
195	show_boot_progress (-10);
196	do_reset (cmdtp, flag, argc, argv);
197	}
198
199	if (!image_check_hcrc (hdr)) {
200	puts ("Bad Header Checksum\n");
201	show_boot_progress (-11);
202	do_reset (cmdtp, flag, argc, argv);
203	}
204	show_boot_progress (10);
205
206	print_image_hdr (hdr);
207
208	if (verify) {
209	puts (" Verifying Checksum ... ");
210
211	if (!image_check_dcrc_wd (hdr, CHUNKSZ)) {
212	puts ("Bad Data CRC\n");
213	show_boot_progress (-12);
214	do_reset (cmdtp, flag, argc, argv);
215	}
216	puts ("OK\n");
217	}
218
219	show_boot_progress (11);
220
221	if (!image_check_os (hdr, IH_OS_LINUX) \|\|
222	!image_check_arch (hdr, IH_ARCH_PPC) \|\|
223	!image_check_type (hdr, IH_TYPE_RAMDISK)) {
224	puts ("No Linux PPC Ramdisk Image\n");
225	show_boot_progress (-13);
226	do_reset (cmdtp, flag, argc, argv);
227	}
228
229	data = image_get_data (hdr);
230	len = image_get_data_size (hdr);
231
232	/*
233	* Now check if we have a multifile image
234	*/
235	} else if (image_check_type (hdr, IH_TYPE_MULTI) && (len_ptr[1])) {
236	u_long tail = image_to_cpu (len_ptr[0]) % 4;
237	int i;
238
239	show_boot_progress (13);
240
241	/* skip kernel length and terminator */
242	data = (ulong)(&len_ptr[2]);
243	/* skip any additional image length fields */
244	for (i=1; len_ptr[i]; ++i)
245	data += 4;
246	/* add kernel length, and align */
247	data += image_to_cpu (len_ptr[0]);
248	if (tail) {
249	data += 4 - tail;
250	}
251
252	len = image_to_cpu (len_ptr[1]);
253
254	} else {
255	/*
256	* no initrd image
257	*/
258	show_boot_progress (14);
259
260	len = data = 0;
261	}
262
263	#if defined(CONFIG_OF_FLAT_TREE) \|\| defined(CONFIG_OF_LIBFDT)
264	if(argc > 3) {
265	of_flat_tree = (char *) simple_strtoul(argv[3], NULL, 16);
266	hdr = (image_header_t *)of_flat_tree;
267	#if defined(CONFIG_OF_FLAT_TREE)
958fc48a	268	if (((ulong )(of_flat_tree)) == OF_DT_HEADER) {
d45d5a18	269	#elif defined(CONFIG_OF_LIBFDT)
958fc48a	270	if (fdt_check_header (of_flat_tree) == 0) {
5d3cc55e MB	271	#endif
	272	#ifndef CFG_NO_FLASH
	273	if (addr2info((ulong)of_flat_tree) != NULL)
	274	of_data = (ulong)of_flat_tree;
	275	#endif
	276	} else if (image_check_magic (hdr)) {
	277	printf("## Flat Device Tree at %08lX\n", hdr);
	278	print_image_hdr (hdr);
	279
	280	if ((image_get_load (hdr) < ((unsigned long)hdr + image_get_image_size (hdr))) &&
	281	((image_get_load (hdr) + image_get_data_size (hdr)) > (unsigned long)hdr)) {
	282	puts ("ERROR: fdt overwritten - "
	283	"must RESET the board to recover.\n");
	284	do_reset (cmdtp, flag, argc, argv);
	285	}
	286
	287	puts (" Verifying Checksum ... ");
	288	if (!image_check_hcrc (hdr)) {
	289	puts ("ERROR: fdt header checksum invalid - "
	290	"must RESET the board to recover.\n");
	291	do_reset (cmdtp, flag, argc, argv);
	292	}
	293
	294	if (!image_check_dcrc (hdr)) {
	295	puts ("ERROR: fdt checksum invalid - "
	296	"must RESET the board to recover.\n");
	297	do_reset (cmdtp, flag, argc, argv);
	298	}
	299	puts ("OK\n");
	300
	301	if (!image_check_type (hdr, IH_TYPE_FLATDT)) {
	302	puts ("ERROR: uImage is not a fdt - "
	303	"must RESET the board to recover.\n");
	304	do_reset (cmdtp, flag, argc, argv);
	305	}
	306	if (image_get_comp (hdr) != IH_COMP_NONE) {
	307	puts ("ERROR: uImage is compressed - "
	308	"must RESET the board to recover.\n");
	309	do_reset (cmdtp, flag, argc, argv);
	310	}
	311	#if defined(CONFIG_OF_FLAT_TREE)
	312	if (((ulong )(of_flat_tree + image_get_header_size ())) != OF_DT_HEADER) {
d45d5a18	313	#elif defined(CONFIG_OF_LIBFDT)
5d3cc55e MB	314	if (fdt_check_header (of_flat_tree + image_get_header_size ()) != 0) {
	315	#endif
	316	puts ("ERROR: uImage data is not a fdt - "
	317	"must RESET the board to recover.\n");
	318	do_reset (cmdtp, flag, argc, argv);
	319	}
	320
	321	memmove ((void *)image_get_load (hdr),
	322	(void *)(of_flat_tree + image_get_header_size ()),
	323	image_get_data_size (hdr));
	324
	325	of_flat_tree = (char *)image_get_load (hdr);
	326	} else {
	327	puts ("Did not find a flat Flat Device Tree.\n"
	328	"Must RESET the board to recover.\n");
	329	do_reset (cmdtp, flag, argc, argv);
	330	}
	331	printf (" Booting using the fdt at 0x%x\n",
	332	of_flat_tree);
	333	} else if (image_check_type (hdr, IH_TYPE_MULTI) && (len_ptr[1]) && (len_ptr[2])) {
	334	u_long tail = image_to_cpu (len_ptr[0]) % 4;
	335	int i;
	336
	337	/* skip kernel length, initrd length, and terminator */
	338	of_flat_tree = (char *)(&len_ptr[3]);
	339	/* skip any additional image length fields */
	340	for (i=2; len_ptr[i]; ++i)
	341	of_flat_tree += 4;
	342	/* add kernel length, and align */
	343	of_flat_tree += image_to_cpu (len_ptr[0]);
	344	if (tail) {
	345	of_flat_tree += 4 - tail;
	346	}
	347
	348	/* add initrd length, and align */
	349	tail = image_to_cpu (len_ptr[1]) % 4;
	350	of_flat_tree += image_to_cpu (len_ptr[1]);
	351	if (tail) {
	352	of_flat_tree += 4 - tail;
	353	}
	354
	355	#ifndef CFG_NO_FLASH
	356	/* move the blob if it is in flash (set of_data to !null) */
	357	if (addr2info ((ulong)of_flat_tree) != NULL)
	358	of_data = (ulong)of_flat_tree;
	359	#endif
	360
	361
	362	#if defined(CONFIG_OF_FLAT_TREE)
	363	if (((ulong )(of_flat_tree)) != OF_DT_HEADER) {
d45d5a18	364	#elif defined(CONFIG_OF_LIBFDT)
5d3cc55e MB	365	if (fdt_check_header (of_flat_tree) != 0) {
	366	#endif
	367	puts ("ERROR: image is not a fdt - "
	368	"must RESET the board to recover.\n");
	369	do_reset (cmdtp, flag, argc, argv);
	370	}
	371
	372	#if defined(CONFIG_OF_FLAT_TREE)
	373	if (((struct boot_param_header *)of_flat_tree)->totalsize !=
	374	image_to_cpu (len_ptr[2])) {
d45d5a18	375	#elif defined(CONFIG_OF_LIBFDT)
5d3cc55e MB	376	if (be32_to_cpu (fdt_totalsize (of_flat_tree)) !=
	377	image_to_cpu (len_ptr[2])) {
	378	#endif
	379	puts ("ERROR: fdt size != image size - "
	380	"must RESET the board to recover.\n");
	381	do_reset (cmdtp, flag, argc, argv);
	382	}
	383	}
	384	#endif
	385	if (!data) {
	386	debug ("No initrd\n");
	387	}
	388
	389	if (data) {
	390	if (!initrd_copy_to_ram) { /* zero-copy ramdisk support */
	391	initrd_start = data;
	392	initrd_end = initrd_start + len;
	393	} else {
	394	initrd_start = (ulong)kbd - len;
	395	initrd_start &= ~(4096 - 1); /* align on page */
	396
	397	if (initrd_high) {
	398	ulong nsp;
	399
	400	/*
	401	* the inital ramdisk does not need to be within
	402	* CFG_BOOTMAPSZ as it is not accessed until after
	403	* the mm system is initialised.
	404	*
	405	* do the stack bottom calculation again and see if
	406	* the initrd will fit just below the monitor stack
	407	* bottom without overwriting the area allocated
	408	* above for command line args and board info.
	409	*/
	410	asm( "mr %0,1": "=r"(nsp) : );
	411	nsp -= 2048; /* just to be sure */
	412	nsp &= ~0xF;
	413	if (nsp > initrd_high) /* limit as specified */
	414	nsp = initrd_high;
	415	nsp -= len;
	416	nsp &= ~(4096 - 1); /* align on page */
	417	if (nsp >= sp)
	418	initrd_start = nsp;
	419	}
	420
	421	show_boot_progress (12);
	422
	423	debug ("## initrd at 0x%08lX ... 0x%08lX (len=%ld=0x%lX)\n",
	424	data, data + len - 1, len, len);
	425
	426	initrd_end = initrd_start + len;
	427	printf (" Loading Ramdisk to %08lx, end %08lx ... ",
	428	initrd_start, initrd_end);
af13cdbc MB	429
	430	memmove_wd((void *)initrd_start,
	431	(void *)data, len, CHUNKSZ);
	432
5d3cc55e MB	433	puts ("OK\n");
	434	}
	435	} else {
	436	initrd_start = 0;
	437	initrd_end = 0;
	438	}
	439
	440	#if defined(CONFIG_OF_LIBFDT)
	441
	442	#ifdef CFG_BOOTMAPSZ
	443	/*
	444	* The blob must be within CFG_BOOTMAPSZ,
	445	* so we flag it to be copied if it is not.
	446	*/
	447	if (of_flat_tree >= (char *)CFG_BOOTMAPSZ)
	448	of_data = (ulong)of_flat_tree;
	449	#endif
	450
	451	/* move of_flat_tree if needed */
	452	if (of_data) {
	453	int err;
	454	ulong of_start, of_len;
	455
	456	of_len = be32_to_cpu(fdt_totalsize(of_data));
	457
	458	/* position on a 4K boundary before the kbd */
	459	of_start = (ulong)kbd - of_len;
	460	of_start &= ~(4096 - 1); /* align on page */
	461	debug ("## device tree at 0x%08lX ... 0x%08lX (len=%ld=0x%lX)\n",
	462	of_data, of_data + of_len - 1, of_len, of_len);
	463
	464	of_flat_tree = (char *)of_start;
	465	printf (" Loading Device Tree to %08lx, end %08lx ... ",
	466	of_start, of_start + of_len - 1);
	467	err = fdt_open_into((void )of_data, (void )of_start, of_len);
	468	if (err != 0) {
	469	puts ("ERROR: fdt move failed - "
	470	"must RESET the board to recover.\n");
	471	do_reset (cmdtp, flag, argc, argv);
	472	}
	473	puts ("OK\n");
	474	}
	475	/*
	476	* Add the chosen node if it doesn't exist, add the env and bd_t
	477	* if the user wants it (the logic is in the subroutines).
	478	*/
	479	if (of_flat_tree) {
	480	if (fdt_chosen(of_flat_tree, initrd_start, initrd_end, 0) < 0) {
	481	puts ("ERROR: /chosen node create failed - "
	482	"must RESET the board to recover.\n");
	483	do_reset (cmdtp, flag, argc, argv);
	484	}
	485	#ifdef CONFIG_OF_HAS_UBOOT_ENV
	486	if (fdt_env(of_flat_tree) < 0) {
	487	puts ("ERROR: /u-boot-env node create failed - "
	488	"must RESET the board to recover.\n");
	489	do_reset (cmdtp, flag, argc, argv);
	490	}
	491	#endif
	492	#ifdef CONFIG_OF_HAS_BD_T
	493	if (fdt_bd_t(of_flat_tree) < 0) {
	494	puts ("ERROR: /bd_t node create failed - "
	495	"must RESET the board to recover.\n");
	496	do_reset (cmdtp, flag, argc, argv);
497	}
498	#endif
499	#ifdef CONFIG_OF_BOARD_SETUP
500	/* Call the board-specific fixup routine */
501	ft_board_setup(of_flat_tree, gd->bd);
502	#endif
503	}
d45d5a18 MB	504
	505	#elif defined(CONFIG_OF_FLAT_TREE)
	506
5d3cc55e MB	507	#ifdef CFG_BOOTMAPSZ
	508	/*
	509	* The blob must be within CFG_BOOTMAPSZ,
	510	* so we flag it to be copied if it is not.
	511	*/
	512	if (of_flat_tree >= (char *)CFG_BOOTMAPSZ)
	513	of_data = (ulong)of_flat_tree;
	514	#endif
	515
	516	/* move of_flat_tree if needed */
	517	if (of_data) {
	518	ulong of_start, of_len;
	519	of_len = ((struct boot_param_header *)of_data)->totalsize;
	520
	521	/* provide extra 8k pad */
	522	of_start = (ulong)kbd - of_len - 8192;
	523	of_start &= ~(4096 - 1); /* align on page */
	524	debug ("## device tree at 0x%08lX ... 0x%08lX (len=%ld=0x%lX)\n",
	525	of_data, of_data + of_len - 1, of_len, of_len);
	526
	527	of_flat_tree = (char *)of_start;
	528	printf (" Loading Device Tree to %08lx, end %08lx ... ",
	529	of_start, of_start + of_len - 1);
	530	memmove ((void )of_start, (void )of_data, of_len);
	531	puts ("OK\n");
	532	}
	533	/*
	534	* Create the /chosen node and modify the blob with board specific
	535	* values as needed.
	536	*/
	537	ft_setup(of_flat_tree, kbd, initrd_start, initrd_end);
	538	/* ft_dump_blob(of_flat_tree); */
d45d5a18 MB	539
	540	#endif /* #if defined(CONFIG_OF_LIBFDT) #elif defined(CONFIG_OF_FLAT_TREE) */
	541
5d3cc55e MB	542	debug ("## Transferring control to Linux (at address %08lx) ...\n",
	543	(ulong)kernel);
	544
	545	show_boot_progress (15);
	546
	547	#if defined(CFG_INIT_RAM_LOCK) && !defined(CONFIG_E500)
	548	unlock_ram_in_cache();
	549	#endif
	550
	551	#if defined(CONFIG_OF_FLAT_TREE) \|\| defined(CONFIG_OF_LIBFDT)
	552	if (of_flat_tree) { /* device tree; boot new style */
	553	/*
	554	* Linux Kernel Parameters (passing device tree):
	555	* r3: pointer to the fdt, followed by the board info data
	556	* r4: physical pointer to the kernel itself
	557	* r5: NULL
	558	* r6: NULL
	559	* r7: NULL
	560	*/
	561	(kernel) ((bd_t )of_flat_tree, (ulong)kernel, 0, 0, 0);
	562	/* does not return */
	563	}
	564	#endif
	565	/*
	566	* Linux Kernel Parameters (passing board info data):
	567	* r3: ptr to board info data
	568	* r4: initrd_start or 0 if no initrd
	569	* r5: initrd_end - unused if r4 is 0
	570	* r6: Start of command line string
	571	* r7: End of command line string
	572	*/
	573	(*kernel) (kbd, initrd_start, initrd_end, cmd_start, cmd_end);
	574	/* does not return */
	575	}