diff options
Diffstat (limited to 'lib_ppc')
| -rw-r--r-- | lib_ppc/Makefile | 3 | ||||
| -rw-r--r-- | lib_ppc/ppc_linux.c | 589 |
2 files changed, 591 insertions, 1 deletions
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..ff2a3e5 --- /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@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[]); + +#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[], + 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); + +#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"); + 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 */ +} |