diff options
Diffstat (limited to 'lib_m68k')
| -rw-r--r-- | lib_m68k/Makefile | 13 | ||||
| -rw-r--r-- | lib_m68k/bootm.c | 171 | ||||
| -rw-r--r-- | lib_m68k/m68k_linux.c | 340 |
3 files changed, 180 insertions, 344 deletions
diff --git a/lib_m68k/Makefile b/lib_m68k/Makefile index 03784fd..f6924cd 100644 --- a/lib_m68k/Makefile +++ b/lib_m68k/Makefile @@ -25,12 +25,17 @@ include $(TOPDIR)/config.mk LIB = $(obj)lib$(ARCH).a -SOBJS = +SOBJS-y += -COBJS = cache.o traps.o time.o interrupts.o board.o m68k_linux.o +COBJS-y += board.o +COBJS-y += bootm.o +COBJS-y += cache.o +COBJS-y += interrupts.o +COBJS-y += time.o +COBJS-y += traps.o -SRCS := $(SOBJS:.o=.S) $(COBJS:.o=.c) -OBJS := $(addprefix $(obj),$(SOBJS) $(COBJS)) +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_m68k/bootm.c b/lib_m68k/bootm.c new file mode 100644 index 0000000..6f49c31 --- /dev/null +++ b/lib_m68k/bootm.c @@ -0,0 +1,171 @@ +/* + * (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 <common.h> +#include <command.h> +#include <image.h> +#include <zlib.h> +#include <bzlib.h> +#include <watchdog.h> +#include <environment.h> +#include <asm/byteorder.h> +#ifdef CONFIG_SHOW_BOOT_PROGRESS +# include <status_led.h> +#endif + +DECLARE_GLOBAL_DATA_PTR; + +#define PHYSADDR(x) x + +#define LINUX_MAX_ENVS 256 +#define LINUX_MAX_ARGS 256 + +static ulong get_sp (void); +static void set_clocks_in_mhz (bd_t *kbd); +extern 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[], + bootm_headers_t *images) +{ + ulong sp; + + ulong rd_data_start, rd_data_end, rd_len; + ulong initrd_start, initrd_end; + int ret; + + ulong cmd_start, cmd_end; + ulong bootmap_base; + bd_t *kbd; + ulong ep = 0; + void (*kernel) (bd_t *, ulong, ulong, ulong, ulong); + struct lmb *lmb = images->lmb; + + bootmap_base = getenv_bootm_low(); + + /* + * 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 ", sp); + + /* adjust sp by 1K to be safe */ + sp -= 1024; + lmb_reserve(lmb, sp, (CFG_SDRAM_BASE + gd->ram_size - sp)); + + /* 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); +#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_M68K, + &rd_data_start, &rd_data_end); + if (ret) + goto error; + + rd_len = rd_data_end - rd_data_start; + ret = boot_ramdisk_high (lmb, rd_data_start, rd_len, + &initrd_start, &initrd_end); + if (ret) + goto error; + + debug("## Transferring control to Linux (at address %08lx) ...\n", + (ulong) kernel); + + show_boot_progress (15); + + if (!images->autostart) + return; + /* + * 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("movel %%a7, %%d0\n" + "movel %%d0, %0\n": "=d"(sp): :"%d0"); + + 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; + } +} diff --git a/lib_m68k/m68k_linux.c b/lib_m68k/m68k_linux.c deleted file mode 100644 index cc974c2..0000000 --- a/lib_m68k/m68k_linux.c +++ /dev/null @@ -1,340 +0,0 @@ -/* - * (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 <common.h> -#include <command.h> -#include <image.h> -#include <zlib.h> -#include <bzlib.h> -#include <watchdog.h> -#include <environment.h> -#include <asm/byteorder.h> - -DECLARE_GLOBAL_DATA_PTR; - -#define PHYSADDR(x) x - -#define LINUX_MAX_ENVS 256 -#define LINUX_MAX_ARGS 256 - -#define CHUNKSZ (64 * 1024) - -#ifdef CONFIG_SHOW_BOOT_PROGRESS -# include <status_led.h> -# define SHOW_BOOT_PROGRESS(arg) show_boot_progress(arg) -#else -# define SHOW_BOOT_PROGRESS(arg) -#endif - -extern image_header_t header; - -void do_bootm_linux(cmd_tbl_t * cmdtp, int flag, - int argc, char *argv[], - ulong addr, ulong * len_ptr, int verify) -{ - ulong sp; - ulong len, checksum; - 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 ((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))ntohl(hdr->ih_ep); - - /* - * Check if there is an initrd image - */ - - 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); - - /* Copy header so we can blank CRC field for re-calculation */ - memmove(&header, (char *)addr, sizeof(image_header_t)); - - if (ntohl(hdr->ih_magic) != IH_MAGIC) { - puts("Bad Magic Number\n"); - SHOW_BOOT_PROGRESS(-10); - do_reset(cmdtp, flag, argc, argv); - } - - data = (ulong) & header; - len = sizeof(image_header_t); - - checksum = ntohl(hdr->ih_hcrc); - hdr->ih_hcrc = 0; - - if (crc32(0, (uchar *) data, len) != checksum) { - puts("Bad Header Checksum\n"); - SHOW_BOOT_PROGRESS(-11); - do_reset(cmdtp, flag, argc, argv); - } - - SHOW_BOOT_PROGRESS(10); - - print_image_hdr(hdr); - - data = addr + sizeof(image_header_t); - len = ntohl(hdr->ih_size); - - if (verify) { - ulong csum = 0; -#if defined(CONFIG_HW_WATCHDOG) || defined(CONFIG_WATCHDOG) - ulong cdata = data, edata = cdata + len; -#endif /* CONFIG_HW_WATCHDOG || CONFIG_WATCHDOG */ - - puts(" Verifying Checksum ... "); - -#if defined(CONFIG_HW_WATCHDOG) || defined(CONFIG_WATCHDOG) - - while (cdata < edata) { - ulong chunk = edata - cdata; - - if (chunk > CHUNKSZ) - chunk = CHUNKSZ; - csum = crc32(csum, (uchar *) cdata, chunk); - cdata += chunk; - - WATCHDOG_RESET(); - } -#else /* !(CONFIG_HW_WATCHDOG || CONFIG_WATCHDOG) */ - csum = crc32(0, (uchar *) data, len); -#endif /* CONFIG_HW_WATCHDOG || CONFIG_WATCHDOG */ - - if (csum != ntohl(hdr->ih_dcrc)) { - puts("Bad Data CRC\n"); - SHOW_BOOT_PROGRESS(-12); - do_reset(cmdtp, flag, argc, argv); - } - puts("OK\n"); - } - - SHOW_BOOT_PROGRESS(11); - - if ((hdr->ih_os != IH_OS_LINUX) || - (hdr->ih_arch != IH_CPU_M68K) || - (hdr->ih_type != 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 ((hdr->ih_type == IH_TYPE_MULTI) && (len_ptr[1])) { - u_long tail = ntohl(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 += ntohl(len_ptr[0]); - if (tail) { - data += 4 - tail; - } - - len = ntohl(len_ptr[1]); - - } else { - /* - * no initrd image - */ - SHOW_BOOT_PROGRESS(14); - - len = data = 0; - } - - 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("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 -= 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; - } - - 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 */ -} |