/* * (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 #include #include #include #include #include #include #include #include #if defined(CONFIG_OF_LIBFDT) #include #include #include static void fdt_error (const char *msg); static int boot_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 boot_relocate_fdt (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 #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 = boot_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 = boot_get_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 = boot_get_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_copy); #if defined(CONFIG_FIT) } else if (images->fit_uname_os) { ret = fit_image_get_entry (images->fit_hdr_os, images->fit_noffset_os, &ep); if (ret) { puts ("Can't get entry point property!\n"); 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 = boot_get_ramdisk (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 = boot_relocate_fdt (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_BOARD_SETUP /* Call the board-specific fixup routine */ ft_board_setup(of_flat_tree, gd->bd); #endif } #endif /* CONFIG_OF_LIBFDT */ ret = boot_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 */ debug (" Booting using OF flat tree...\n"); (*kernel) ((bd_t *)of_flat_tree, (ulong)kernel, 0, 0, 0); /* does not return */ } else #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 */ debug (" Booting using board info...\n"); (*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; } /** * fit_check_fdt - verify FIT format FDT subimage * @fit_hdr: pointer to the FIT header * fdt_noffset: FDT subimage node offset within FIT image * @verify: data CRC verification flag * * fit_check_fdt() verifies integrity of the FDT subimage and from * specified FIT image. * * returns: * 1, on success * 0, on failure */ #if defined(CONFIG_FIT) static int fit_check_fdt (const void *fit, int fdt_noffset, int verify) { fit_image_print (fit, fdt_noffset, " "); if (verify) { puts (" Verifying Hash Integrity ... "); if (!fit_image_check_hashes (fit, fdt_noffset)) { fdt_error ("Bad Data Hash"); return 0; } puts ("OK\n"); } if (!fit_image_check_type (fit, fdt_noffset, IH_TYPE_FLATDT)) { fdt_error ("Not a FDT image"); return 0; } if (!fit_image_check_comp (fit, fdt_noffset, IH_COMP_NONE)) { fdt_error ("FDT image is compressed"); return 0; } return 1; } #endif /* CONFIG_FIT */ static int boot_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; int cfg_noffset; int fdt_noffset; const void *data; size_t size; #endif *of_flat_tree = NULL; *of_size = 0; if (argc > 3 || genimg_has_config (images)) { #if defined(CONFIG_FIT) if (argc > 3) { /* * 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); } #if defined(CONFIG_FIT) } else { /* use FIT configuration provided in first bootm * command argument */ fdt_addr = (ulong)images->fit_hdr_os; fit_uname_config = images->fit_uname_cfg; debug ("* fdt: using config '%s' from image at 0x%08lx\n", fit_uname_config, fdt_addr); /* * Check whether configuration has FDT blob defined, * if not quit silently. */ fit_hdr = (void *)fdt_addr; cfg_noffset = fit_conf_get_node (fit_hdr, fit_uname_config); if (cfg_noffset < 0) { debug ("* fdt: no such config\n"); return 0; } fdt_noffset = fit_conf_get_fdt_node (fit_hdr, cfg_noffset); if (fdt_noffset < 0) { debug ("* fdt: no fdt in config\n"); return 0; } } #endif debug ("## Checking for 'FDT'/'FDT Image' at %08lx\n", fdt_addr); /* copy from dataflash if needed */ fdt_addr = genimg_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 (genimg_get_format ((void *)fdt_addr)) { case IMAGE_FORMAT_LEGACY: /* verify fdt_addr points to a valid image header */ printf ("## Flattened Device Tree from 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; } debug (" Loading FDT from 0x%08lx to 0x%08lx\n", image_get_data (fdt_hdr), load_start); memmove ((void *)load_start, (void *)image_get_data (fdt_hdr), image_get_data_size (fdt_hdr)); fdt_blob = (char *)load_start; 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 (fit_check_format ((const void *)fdt_addr)) { /* * FIT image */ fit_hdr = (void *)fdt_addr; printf ("## Flattened Device Tree from FIT Image at %08lx\n", fdt_addr); if (!fit_uname_fdt) { /* * no FDT blob image node unit name, * try to get config node first. If * config unit node name is NULL * fit_conf_get_node() will try to * find default config node */ cfg_noffset = fit_conf_get_node (fit_hdr, fit_uname_config); if (cfg_noffset < 0) { fdt_error ("Could not find configuration node\n"); goto error; } fit_uname_config = fdt_get_name (fit_hdr, cfg_noffset, NULL); printf (" Using '%s' configuration\n", fit_uname_config); fdt_noffset = fit_conf_get_fdt_node (fit_hdr, cfg_noffset); fit_uname_fdt = fit_get_name (fit_hdr, fdt_noffset, NULL); } else { /* get FDT component image node offset */ fdt_noffset = fit_image_get_node (fit_hdr, fit_uname_fdt); } if (fdt_noffset < 0) { fdt_error ("Could not find subimage node\n"); goto error; } printf (" Trying '%s' FDT blob subimage\n", fit_uname_fdt); if (!fit_check_fdt (fit_hdr, fdt_noffset, images->verify)) goto error; /* get ramdisk image data address and length */ if (fit_image_get_data (fit_hdr, fdt_noffset, &data, &size)) { fdt_error ("Could not find FDT subimage data"); goto error; } /* verift that image data is a proper FDT blob */ if (fdt_check_header ((char *)data) != 0) { fdt_error ("Subimage data is not a FTD"); goto error; } /* * move image data to the load address, * make sure we don't overwrite initial image */ image_start = (ulong)fit_hdr; image_end = fit_get_end (fit_hdr); if (fit_image_get_load (fit_hdr, fdt_noffset, &load_start) == 0) { load_end = load_start + size; if ((load_start < image_end) && (load_end > image_start)) { fdt_error ("FDT overwritten"); goto error; } printf (" Loading FDT from 0x%08lx to 0x%08lx\n", (ulong)data, load_start); memmove ((void *)load_start, (void *)data, size); fdt_blob = (char *)load_start; } else { fdt_blob = (char *)data; } images->fit_hdr_fdt = fit_hdr; images->fit_uname_fdt = fit_uname_fdt; images->fit_noffset_fdt = fdt_noffset; break; } else #endif { /* * FDT blob */ fdt_blob = (char *)fdt_addr; debug ("* fdt: raw FDT blob\n"); printf ("## Flattened Device Tree blob at %08lx\n", fdt_blob); } 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_copy, 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 { debug ("## No Flattened Device Tree\n"); return 0; } } else { debug ("## No Flattened Device Tree\n"); 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 boot_relocate_fdt (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_blob)); /* 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