diff options
Diffstat (limited to 'lib_ppc')
| -rw-r--r-- | lib_ppc/Makefile | 22 | ||||
| -rw-r--r-- | lib_ppc/bootm.c | 601 |
2 files changed, 616 insertions, 7 deletions
diff --git a/lib_ppc/Makefile b/lib_ppc/Makefile index afbd5ca..3d76b70 100644 --- a/lib_ppc/Makefile +++ b/lib_ppc/Makefile @@ -25,13 +25,21 @@ include $(TOPDIR)/config.mk LIB = $(obj)lib$(ARCH).a -SOBJS = ppccache.o ppcstring.o ticks.o - -COBJS = board.o \ - bat_rw.o cache.o extable.o kgdb.o time.o interrupts.o - -SRCS := $(SOBJS:.o=.S) $(COBJS:.o=.c) -OBJS := $(addprefix $(obj),$(SOBJS) $(COBJS)) +SOBJS-y += ppccache.o +SOBJS-y += ppcstring.o +SOBJS-y += ticks.o + +COBJS-y += bat_rw.o +COBJS-y += board.o +COBJS-y += bootm.o +COBJS-y += cache.o +COBJS-y += extable.o +COBJS-y += interrupts.o +COBJS-y += kgdb.o +COBJS-y += time.o + +SRCS := $(SOBJS-y:.o=.S) $(COBJS-y:.o=.c) +OBJS := $(addprefix $(obj),$(SOBJS-y) $(COBJS-y)) $(LIB): $(obj).depend $(OBJS) $(AR) $(ARFLAGS) $@ $(OBJS) diff --git a/lib_ppc/bootm.c b/lib_ppc/bootm.c new file mode 100644 index 0000000..1afef46 --- /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 |