[new uImage] Move PPC do_bootm_linux() to lib_ppc/ppc_linux.c

PPC implementation of do_bootm_linux() routine is moved to
a dedicated file lib_ppc/ppc_linux.c

Signed-off-by: Marian Balakowicz <m8@semihalf.com>

2 files changed, 591 insertions, 1 deletions

diff --git a/lib_ppc/Makefile b/lib_ppc/Makefile
index 2ba034f1ee..2aa0154856 100644
--- a/lib_ppc/Makefile
+++ b/lib_ppc/Makefile
@@ -28,7 +28,8 @@ LIB	= $(obj)lib$(ARCH).a
 SOBJS	= ppcstring.o ticks.o
 
 COBJS	= board.o \
-	  bat_rw.o cache.o extable.o kgdb.o time.o interrupts.o
+	  bat_rw.o cache.o extable.o kgdb.o time.o interrupts.o \
+	  ppc_linux.o
 
 SRCS 	:= $(SOBJS:.o=.S) $(COBJS:.o=.c)
 OBJS	:= $(addprefix $(obj),$(SOBJS) $(COBJS))
diff --git a/lib_ppc/ppc_linux.c b/lib_ppc/ppc_linux.c
new file mode 100644
index 0000000000..ff2a3e56ff
--- /dev/null
+++ b/lib_ppc/ppc_linux.c
@@ -0,0 +1,589 @@
+/*
+ * (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>
+#endif
+#if 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
+
+#define CHUNKSZ (64 * 1024)
+
+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 + image_get_header_size ())) != OF_DT_HEADER) {
+#else
+		if (fdt_check_header (of_flat_tree + image_get_header_size ()) != 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) {
+#else
+			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) {
+#else
+		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])) {
+#else
+		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);
+#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;
+	}
+
+#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
+	}
+#endif /* CONFIG_OF_LIBFDT */
+#if 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
+	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 */
+}