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-rw-r--r--lib_ppc/bootm.c554
1 files changed, 554 insertions, 0 deletions
diff --git a/lib_ppc/bootm.c b/lib_ppc/bootm.c
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--- /dev/null
+++ b/lib_ppc/bootm.c
@@ -0,0 +1,554 @@
+/*
+ * (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
+ */
+
+#define DEBUG
+
+#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)) {
+ ulong image_start, image_end;
+ ulong load_start, load_end;
+
+ printf ("## Flat Device Tree at %08lX\n", fdt_hdr);
+ print_image_hdr (fdt_hdr);
+
+ image_start = (ulong)fdt_hdr;
+ image_end = image_get_image_end (fdt_hdr);
+
+ load_start = image_get_load (fdt_hdr);
+ load_end = load_start + image_get_data_size (fdt_hdr);
+
+ if ((load_start < image_end) && (load_end > image_start)) {
+ 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 */
+}
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