From 4a995edec1ac163d9326d143ffe2b47e7543407f Mon Sep 17 00:00:00 2001 From: Marian Balakowicz Date: Thu, 31 Jan 2008 13:20:06 +0100 Subject: [new uImage] Rename architecture specific bootm code files Implementation of the do_bootm_linux() and other bootm helper routines is architecture specific code. As such it resides in lib_ directories in files named _linux.c This patch renames those files to a more clear and accurate lib_/bootm.c form. List of the renamed files: lib_arm/armlinux.c -> lib_arm/bootm.c lib_avr32/avr32_linux.c -> lib_avr32/bootm.c lib_blackfin/bf533_linux.c -> lib_blackfin/bootm.c lib_i386/i386_linux.c -> lib_i386/bootm.c lib_m68k/m68k_linux.c -> lib_m68k/bootm.c lib_microblaze/microblaze_linux.c -> lib_microblaze/bootm.c lib_mips/mips_linux.c -> lib_mips/bootm.c lib_nios/nios_linux.c -> lib_nios/bootm.c lib_nios2/nios_linux.c -> lib_nios2/bootm.c lib_ppc/ppc_linux.c -> lib_ppc/bootm.c lib_sh/sh_linux.c -> lib_sh/bootm.c Signed-off-by: Marian Balakowicz --- lib_m68k/bootm.c | 279 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 279 insertions(+) create mode 100644 lib_m68k/bootm.c (limited to 'lib_m68k/bootm.c') diff --git a/lib_m68k/bootm.c b/lib_m68k/bootm.c new file mode 100644 index 0000000000..b135556a99 --- /dev/null +++ b/lib_m68k/bootm.c @@ -0,0 +1,279 @@ +/* + * (C) Copyright 2003 + * 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 + +DECLARE_GLOBAL_DATA_PTR; + +#define PHYSADDR(x) x + +#define LINUX_MAX_ENVS 256 +#define LINUX_MAX_ARGS 256 + +#ifdef CONFIG_SHOW_BOOT_PROGRESS +# include +# define SHOW_BOOT_PROGRESS(arg) show_boot_progress(arg) +#else +# define SHOW_BOOT_PROGRESS(arg) +#endif + +int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]); + +void do_bootm_linux(cmd_tbl_t * cmdtp, int flag, + int argc, char *argv[], + image_header_t *hdr, int verify) +{ + ulong sp; + + ulong rd_data, rd_len; + ulong initrd_high; + ulong initrd_start, initrd_end; + image_header_t *rd_hdr; + int initrd_copy_to_ram = 1; + + ulong cmd_start, cmd_end; + char *cmdline; + char *s; + bd_t *kbd; + void (*kernel) (bd_t *, ulong, ulong, ulong, ulong); + + 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("movel %%a7, %%d0\n" + "movel %%d0, %0\n": "=d"(sp): :"%d0"); + + 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); + + do_bdinfo(NULL, 0, 0, NULL); +#endif + + if ((s = getenv("clocks_in_mhz")) != NULL) { + /* convert all clock information to MHz */ + kbd->bi_intfreq /= 1000000L; + kbd->bi_busfreq /= 1000000L; + } + + kernel = + (void (*)(bd_t *, ulong, ulong, ulong, ulong))image_get_ep (hdr); + + /* + * Check if there is an initrd image + */ + + 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", 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); + + rd_data = image_get_data (rd_hdr); + rd_len = image_get_data_size (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_M68K) || + !image_check_type (rd_hdr, IH_TYPE_RAMDISK)) { + puts("No Linux ColdFire Ramdisk Image\n"); + SHOW_BOOT_PROGRESS(-13); + do_reset(cmdtp, flag, argc, argv); + } + + /* + * 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 + */ + SHOW_BOOT_PROGRESS (13); + image_multi_getimg (hdr, 1, &rd_data, &rd_len); + } else { + /* + * no initrd image + */ + SHOW_BOOT_PROGRESS(14); + + rd_len = rd_data = 0; + } + + 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("movel %%a7, %%d0\n" + "movel %%d0, %0\n": "=d"(nsp): :"%d0"); + + 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; + } + + debug("## Transferring control to Linux (at address %08lx) ...\n", + (ulong) kernel); + + SHOW_BOOT_PROGRESS(15); + + /* + * 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 */ +} -- cgit