[U-Boot-Users] [PATCH 03/13] [new uImage] Move PPC do_bootm_linux() to lib_ppc/ppc_linux.c

Marian Balakowicz
2008-01-11T14:28:51Z

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>
---

common/cmd_bootm.c | 543 -----------------------------------------------
lib_ppc/Makefile | 3
lib_ppc/ppc_linux.c | 589 +++++++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 592 insertions(+), 543 deletions(-)
create mode 100644 lib_ppc/ppc_linux.c

diff --git a/common/cmd_bootm.c b/common/cmd_bootm.c
index ba07e4e..a4952fd 100644
--- a/common/cmd_bootm.c
+++ b/common/cmd_bootm.c
@@ -58,14 +58,6 @@ extern int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
#include <hush.h>
#endif

-#ifdef CFG_INIT_RAM_LOCK
-#include <asm/cache.h>
-#endif
-
-#ifdef CONFIG_LOGBUFFER
-#include <logbuff.h>
-#endif
-
#ifdef CONFIG_HAS_DATAFLASH
#include <dataflash.h>
#endif
@@ -112,15 +104,8 @@ typedef void boot_os_Fcn (cmd_tbl_t *cmdtp, int flag,
ulong *len_ptr, /* multi-file image length table */
int verify); /* getenv("verify")[0] != 'n' */

-#ifdef DEBUG
-extern int do_bdinfo ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
-#endif
-
-#ifdef CONFIG_PPC
-static boot_os_Fcn do_bootm_linux;
-#else
extern boot_os_Fcn do_bootm_linux;
-#endif
+
#ifdef CONFIG_SILENT_CONSOLE
static void fixup_silent_linux (void);
#endif
@@ -475,532 +460,6 @@ fixup_silent_linux ()
}
#endif /* CONFIG_SILENT_CONSOLE */

-#ifdef CONFIG_PPC
-static 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);
-
- 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_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 */
-}
-#endif /* CONFIG_PPC */
-
static void
do_bootm_netbsd (cmd_tbl_t *cmdtp, int flag,
int argc, char *argv[],
diff --git a/lib_ppc/Makefile b/lib_ppc/Makefile
index 2ba034f..2aa0154 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 0000000..823758c
--- /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 at 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[]);
+
+#ifdef DEBUG
+extern int do_bdinfo(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
+#endif
+
+#ifdef CONFIG_PPC
+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);
+
+ 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_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 */
+}
+#endif /* CONFIG_PPC */