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-rw-r--r--lib_ppc/bootm.c601
1 files changed, 601 insertions, 0 deletions
diff --git a/lib_ppc/bootm.c b/lib_ppc/bootm.c
new file mode 100644
index 000000000..1afef46df
--- /dev/null
+++ b/lib_ppc/bootm.c
@@ -0,0 +1,601 @@
+/*
+ * (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>
+
+static void fdt_error (const char *msg);
+static int get_fdt (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
+ bootm_headers_t *images, char **of_flat_tree, ulong *of_size);
+static int fdt_relocate (struct lmb *lmb, ulong bootmap_base,
+ cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
+ char **of_flat_tree, ulong *of_size);
+#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[]);
+extern ulong get_effective_memsize(void);
+static ulong get_sp (void);
+static void set_clocks_in_mhz (bd_t *kbd);
+
+#ifndef CFG_LINUX_LOWMEM_MAX_SIZE
+#define CFG_LINUX_LOWMEM_MAX_SIZE (768*1024*1024)
+#endif
+
+void __attribute__((noinline))
+do_bootm_linux(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
+ bootm_headers_t *images)
+{
+ ulong sp;
+
+ ulong initrd_start, initrd_end;
+ ulong rd_data_start, rd_data_end, rd_len;
+ ulong size;
+
+ ulong cmd_start, cmd_end, bootmap_base;
+ bd_t *kbd;
+ ulong ep = 0;
+ void (*kernel)(bd_t *, ulong, ulong, ulong, ulong);
+ int ret;
+ ulong of_size = 0;
+ struct lmb *lmb = images->lmb;
+
+#if defined(CONFIG_OF_LIBFDT)
+ char *of_flat_tree = NULL;
+#endif
+
+ bootmap_base = getenv_bootm_low();
+ size = getenv_bootm_size();
+
+#ifdef DEBUG
+ if (((u64)bootmap_base + size) > (CFG_SDRAM_BASE + (u64)gd->ram_size))
+ puts("WARNING: bootm_low + bootm_size exceed total memory\n");
+ if ((bootmap_base + size) > get_effective_memsize())
+ puts("WARNING: bootm_low + bootm_size exceed eff. memory\n");
+#endif
+
+ size = min(size, get_effective_memsize());
+ size = min(size, CFG_LINUX_LOWMEM_MAX_SIZE);
+
+ if (size < getenv_bootm_size()) {
+ ulong base = bootmap_base + size;
+ printf("WARNING: adjusting available memory to %x\n", size);
+ lmb_reserve(lmb, base, getenv_bootm_size() - size);
+ }
+
+ /*
+ * 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.
+ */
+ sp = get_sp();
+ debug ("## Current stack ends at 0x%08lx\n", sp);
+
+ /* adjust sp by 1K to be safe */
+ sp -= 1024;
+ lmb_reserve(lmb, sp, (CFG_SDRAM_BASE + get_effective_memsize() - sp));
+
+#if defined(CONFIG_OF_LIBFDT)
+ /* find flattened device tree */
+ ret = get_fdt (cmdtp, flag, argc, argv, images, &of_flat_tree, &of_size);
+
+ if (ret)
+ goto error;
+#endif
+
+ if (!of_size) {
+ /* allocate space and init command line */
+ ret = get_boot_cmdline (lmb, &cmd_start, &cmd_end, bootmap_base);
+ if (ret) {
+ puts("ERROR with allocation of cmdline\n");
+ goto error;
+ }
+
+ /* allocate space for kernel copy of board info */
+ ret = get_boot_kbd (lmb, &kbd, bootmap_base);
+ if (ret) {
+ puts("ERROR with allocation of kernel bd\n");
+ goto error;
+ }
+ set_clocks_in_mhz(kbd);
+ }
+
+ /* find kernel entry point */
+ if (images->legacy_hdr_valid) {
+ ep = image_get_ep (images->legacy_hdr_os);
+#if defined(CONFIG_FIT)
+ } else if (images->fit_uname_os) {
+ fit_unsupported_reset ("PPC linux bootm");
+ goto error;
+#endif
+ } else {
+ puts ("Could not find kernel entry point!\n");
+ goto error;
+ }
+ kernel = (void (*)(bd_t *, ulong, ulong, ulong, ulong))ep;
+
+ /* find ramdisk */
+ ret = get_ramdisk (cmdtp, flag, argc, argv, images,
+ IH_ARCH_PPC, &rd_data_start, &rd_data_end);
+
+ if (ret)
+ goto error;
+
+ rd_len = rd_data_end - rd_data_start;
+
+#if defined(CONFIG_OF_LIBFDT)
+ ret = fdt_relocate (lmb, bootmap_base,
+ cmdtp, flag, argc, argv, &of_flat_tree, &of_size);
+
+ /*
+ * 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_size) {
+ /* pass in dummy initrd info, we'll fix up later */
+ if (fdt_chosen(of_flat_tree, rd_data_start, rd_data_end, 0) < 0) {
+ fdt_error ("/chosen node create failed");
+ goto error;
+ }
+#ifdef CONFIG_OF_HAS_UBOOT_ENV
+ if (fdt_env(of_flat_tree) < 0) {
+ fdt_error ("/u-boot-env node create failed");
+ goto error;
+ }
+#endif
+#ifdef CONFIG_OF_HAS_BD_T
+ if (fdt_bd_t(of_flat_tree) < 0) {
+ fdt_error ("/bd_t node create failed");
+ goto error;
+ }
+#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 */
+
+ ret = ramdisk_high (lmb, rd_data_start, rd_len, &initrd_start, &initrd_end);
+ if (ret)
+ goto error;
+
+#if defined(CONFIG_OF_LIBFDT)
+ /* fixup the initrd now that we know where it should be */
+ if ((of_flat_tree) && (initrd_start && initrd_end)) {
+ uint64_t addr, size;
+ int total = fdt_num_mem_rsv(of_flat_tree);
+ int j;
+
+ /* Look for the dummy entry and delete it */
+ for (j = 0; j < total; j++) {
+ fdt_get_mem_rsv(of_flat_tree, j, &addr, &size);
+ if (addr == rd_data_start) {
+ fdt_del_mem_rsv(of_flat_tree, j);
+ break;
+ }
+ }
+
+ ret = fdt_add_mem_rsv(of_flat_tree, initrd_start,
+ initrd_end - initrd_start + 1);
+ if (ret < 0) {
+ printf("fdt_chosen: %s\n", fdt_strerror(ret));
+ goto error;
+ }
+
+ do_fixup_by_path_u32(of_flat_tree, "/chosen",
+ "linux,initrd-start", initrd_start, 0);
+ do_fixup_by_path_u32(of_flat_tree, "/chosen",
+ "linux,initrd-end", initrd_end, 0);
+ }
+#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 (!images->autostart)
+ return ;
+
+#if 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 */
+ return ;
+
+error:
+ if (images->autostart)
+ do_reset (cmdtp, flag, argc, argv);
+ return ;
+}
+
+static ulong get_sp (void)
+{
+ ulong sp;
+
+ asm( "mr %0,1": "=r"(sp) : );
+ return sp;
+}
+
+static void set_clocks_in_mhz (bd_t *kbd)
+{
+ char *s;
+
+ 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 */
+ }
+}
+
+#if defined(CONFIG_OF_LIBFDT)
+static void fdt_error (const char *msg)
+{
+ puts ("ERROR: ");
+ puts (msg);
+ puts (" - must RESET the board to recover.\n");
+}
+
+static image_header_t *image_get_fdt (ulong fdt_addr)
+{
+ image_header_t *fdt_hdr = (image_header_t *)fdt_addr;
+
+ image_print_contents (fdt_hdr);
+
+ puts (" Verifying Checksum ... ");
+ if (!image_check_hcrc (fdt_hdr)) {
+ fdt_error ("fdt header checksum invalid");
+ return NULL;
+ }
+
+ if (!image_check_dcrc (fdt_hdr)) {
+ fdt_error ("fdt checksum invalid");
+ return NULL;
+ }
+ puts ("OK\n");
+
+ if (!image_check_type (fdt_hdr, IH_TYPE_FLATDT)) {
+ fdt_error ("uImage is not a fdt");
+ return NULL;
+ }
+ if (image_get_comp (fdt_hdr) != IH_COMP_NONE) {
+ fdt_error ("uImage is compressed");
+ return NULL;
+ }
+ if (fdt_check_header ((char *)image_get_data (fdt_hdr)) != 0) {
+ fdt_error ("uImage data is not a fdt");
+ return NULL;
+ }
+ return fdt_hdr;
+}
+
+static int get_fdt (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
+ bootm_headers_t *images, char **of_flat_tree, ulong *of_size)
+{
+ ulong fdt_addr;
+ image_header_t *fdt_hdr;
+ char *fdt_blob = NULL;
+ ulong image_start, image_end;
+ ulong load_start, load_end;
+#if defined(CONFIG_FIT)
+ void *fit_hdr;
+ const char *fit_uname_config = NULL;
+ const char *fit_uname_fdt = NULL;
+ ulong default_addr;
+#endif
+
+ if (argc > 3) {
+#if defined(CONFIG_FIT)
+ /*
+ * If the FDT blob comes from the FIT image and the FIT image
+ * address is omitted in the command line argument, try to use
+ * ramdisk or os FIT image address or default load address.
+ */
+ if (images->fit_uname_rd)
+ default_addr = (ulong)images->fit_hdr_rd;
+ else if (images->fit_uname_os)
+ default_addr = (ulong)images->fit_hdr_os;
+ else
+ default_addr = load_addr;
+
+ if (fit_parse_conf (argv[3], default_addr,
+ &fdt_addr, &fit_uname_config)) {
+ debug ("* fdt: config '%s' from image at 0x%08lx\n",
+ fit_uname_config, fdt_addr);
+ } else if (fit_parse_subimage (argv[3], default_addr,
+ &fdt_addr, &fit_uname_fdt)) {
+ debug ("* fdt: subimage '%s' from image at 0x%08lx\n",
+ fit_uname_fdt, fdt_addr);
+ } else
+#endif
+ {
+ fdt_addr = simple_strtoul(argv[3], NULL, 16);
+ debug ("* fdt: cmdline image address = 0x%08lx\n",
+ fdt_addr);
+ }
+
+ debug ("## Checking for 'FDT'/'FDT image' at %08lx\n",
+ fdt_addr);
+
+ /* copy from dataflash if needed */
+ fdt_addr = gen_get_image (fdt_addr);
+
+ /*
+ * Check if there is an FDT image at the
+ * address provided in the second bootm argument
+ * check image type, for FIT images get a FIT node.
+ */
+ switch (gen_image_get_format ((void *)fdt_addr)) {
+ case IMAGE_FORMAT_LEGACY:
+ debug ("* fdt: legacy format image\n");
+
+ /* verify fdt_addr points to a valid image header */
+ printf ("## Flattened Device Tree Legacy Image at %08lx\n",
+ fdt_addr);
+ fdt_hdr = image_get_fdt (fdt_addr);
+ if (!fdt_hdr)
+ goto error;
+
+ /*
+ * move image data to the load address,
+ * make sure we don't overwrite initial image
+ */
+ 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)) {
+ fdt_error ("fdt overwritten");
+ goto error;
+ }
+ memmove ((void *)image_get_load (fdt_hdr),
+ (void *)image_get_data (fdt_hdr),
+ image_get_data_size (fdt_hdr));
+
+ fdt_blob = (char *)image_get_load (fdt_hdr);
+ break;
+ case IMAGE_FORMAT_FIT:
+ /*
+ * This case will catch both: new uImage format
+ * (libfdt based) and raw FDT blob (also libfdt
+ * based).
+ */
+#if defined(CONFIG_FIT)
+ /* check FDT blob vs FIT blob */
+ if (0) { /* FIXME: call FIT format verification */
+ /*
+ * FIT image
+ */
+ fit_hdr = (void *)fdt_addr;
+ debug ("* fdt: FIT format image\n");
+ fit_unsupported_reset ("PPC fdt");
+ goto error;
+ } else
+#endif
+ {
+ /*
+ * FDT blob
+ */
+ debug ("* fdt: raw FDT blob\n");
+ printf ("## Flattened Device Tree blob at %08lx\n", fdt_blob);
+ fdt_blob = (char *)fdt_addr;
+ }
+ break;
+ default:
+ fdt_error ("Did not find a cmdline Flattened Device Tree");
+ goto error;
+ }
+
+ printf (" Booting using the fdt blob at 0x%x\n", fdt_blob);
+
+ } else if (images->legacy_hdr_valid &&
+ image_check_type (images->legacy_hdr_os, IH_TYPE_MULTI)) {
+
+ ulong fdt_data, fdt_len;
+
+ /*
+ * Now check if we have a legacy multi-component image,
+ * get second entry data start address and len.
+ */
+ printf ("## Flattened Device Tree from multi "
+ "component Image at %08lX\n",
+ (ulong)images->legacy_hdr_os);
+
+ image_multi_getimg (images->legacy_hdr_os, 2, &fdt_data, &fdt_len);
+ if (fdt_len) {
+
+ fdt_blob = (char *)fdt_data;
+ printf (" Booting using the fdt at 0x%x\n", fdt_blob);
+
+ if (fdt_check_header (fdt_blob) != 0) {
+ fdt_error ("image is not a fdt");
+ goto error;
+ }
+
+ if (be32_to_cpu (fdt_totalsize (fdt_blob)) != fdt_len) {
+ fdt_error ("fdt size != image size");
+ goto error;
+ }
+ } else {
+ fdt_error ("Did not find a Flattened Device Tree "
+ "in a legacy multi-component image");
+ goto error;
+ }
+ } else {
+ debug ("## No Flattened Device Tree\n");
+ *of_flat_tree = NULL;
+ *of_size = 0;
+ return 0;
+ }
+
+ *of_flat_tree = fdt_blob;
+ *of_size = be32_to_cpu (fdt_totalsize (fdt_blob));
+ debug (" of_flat_tree at 0x%08lx size 0x%08lx\n",
+ *of_flat_tree, *of_size);
+
+ return 0;
+
+error:
+ do_reset (cmdtp, flag, argc, argv);
+ return 1;
+}
+
+static int fdt_relocate (struct lmb *lmb, ulong bootmap_base,
+ cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
+ char **of_flat_tree, ulong *of_size)
+{
+ char *fdt_blob = *of_flat_tree;
+ ulong relocate = 0;
+ ulong of_len = 0;
+
+ /* nothing to do */
+ if (*of_size == 0)
+ return 0;
+
+ if (fdt_check_header (fdt_blob) != 0) {
+ fdt_error ("image is not a fdt");
+ goto error;
+ }
+
+#ifndef CFG_NO_FLASH
+ /* move the blob if it is in flash (set relocate) */
+ if (addr2info ((ulong)fdt_blob) != NULL)
+ relocate = 1;
+#endif
+
+ /*
+ * The blob must be within CFG_BOOTMAPSZ,
+ * so we flag it to be copied if it is not.
+ */
+ if (fdt_blob >= (char *)CFG_BOOTMAPSZ)
+ relocate = 1;
+
+ of_len = be32_to_cpu (fdt_totalsize (fdt));
+
+ /* move flattend device tree if needed */
+ if (relocate) {
+ int err;
+ ulong of_start;
+
+ /* position on a 4K boundary before the alloc_current */
+ of_start = lmb_alloc_base(lmb, of_len, 0x1000,
+ (CFG_BOOTMAPSZ + bootmap_base));
+
+ if (of_start == 0) {
+ puts("device tree - allocation error\n");
+ goto error;
+ }
+
+ debug ("## device tree at 0x%08lX ... 0x%08lX (len=%ld=0x%lX)\n",
+ (ulong)fdt_blob, (ulong)fdt_blob + of_len - 1,
+ of_len, of_len);
+
+ printf (" Loading Device Tree to %08lx, end %08lx ... ",
+ of_start, of_start + of_len - 1);
+
+ err = fdt_open_into (fdt_blob, (void *)of_start, of_len);
+ if (err != 0) {
+ fdt_error ("fdt move failed");
+ goto error;
+ }
+ puts ("OK\n");
+
+ *of_flat_tree = (char *)of_start;
+ } else {
+ *of_flat_tree = fdt_blob;
+ lmb_reserve(lmb, (ulong)fdt, of_len);
+ }
+
+ return 0;
+
+error:
+ return 1;
+}
+#endif
generated by cgit v1.2.3-70-g09d2 (git 2.51.2) at 2025-10-31 22:26:33 +0000