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author | TsiChungLiew <Tsi-Chung.Liew@freescale.com> | 2007-08-16 20:05:11 (GMT) |
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committer | John Rigby <jrigby@freescale.com> | 2007-08-16 23:43:23 (GMT) |
commit | 8ae158cd87a4a25722b27835261b6ff0fa2aa6a7 (patch) | |
tree | fdd1cd3c810506beb0375b6923a03679de3bec00 /lib_m68k/m68k_linux.c | |
parent | a1436a842654a8d3927d082a8ae9ee0a10da62d7 (diff) | |
download | u-boot-8ae158cd87a4a25722b27835261b6ff0fa2aa6a7.tar.xz |
ColdFire: Add M54455EVB for MCF5445x
Signed-off-by: TsiChungLiew <Tsi-Chung.Liew@freescale.com>
Diffstat (limited to 'lib_m68k/m68k_linux.c')
-rw-r--r-- | lib_m68k/m68k_linux.c | 376 |
1 files changed, 222 insertions, 154 deletions
diff --git a/lib_m68k/m68k_linux.c b/lib_m68k/m68k_linux.c index 6c194f8..fde1744 100644 --- a/lib_m68k/m68k_linux.c +++ b/lib_m68k/m68k_linux.c @@ -25,6 +25,8 @@ #include <command.h> #include <image.h> #include <zlib.h> +#include <bzlib.h> +#include <environment.h> #include <asm/byteorder.h> DECLARE_GLOBAL_DATA_PTR; @@ -34,103 +36,189 @@ DECLARE_GLOBAL_DATA_PTR; #define LINUX_MAX_ENVS 256 #define LINUX_MAX_ARGS 256 -extern image_header_t header; /* from cmd_bootm.c */ - -extern int do_reset (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[]); - -static int linux_argc; -static char **linux_argv; - -static char **linux_env; -static char *linux_env_p; -static int linux_env_idx; +#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 -static void linux_params_init (ulong start, char *commandline); -static void linux_env_set (char *env_name, char *env_val); +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) +void do_bootm_linux(cmd_tbl_t * cmdtp, int flag, + int argc, char *argv[], + ulong addr, ulong * len_ptr, int verify) { - ulong len = 0, checksum; + ulong sp; + ulong len, checksum; ulong initrd_start, initrd_end; + ulong cmd_start, cmd_end; + ulong initrd_high; ulong data; - void (*theKernel) (int, char **, char **, int *); + 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; - char *commandline = getenv ("bootargs"); - char env_buf[12]; - theKernel = - (void (*)(int, char **, char **, int *)) ntohl (hdr->ih_ep); + 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) { - show_boot_progress (9); + debug("Not skipping initrd\n"); + SHOW_BOOT_PROGRESS(9); - addr = simple_strtoul (argv[2], NULL, 16); + addr = simple_strtoul(argv[2], NULL, 16); - printf ("## Loading Ramdisk Image at %08lx ...\n", addr); + printf("## Loading RAMDisk Image at %08lx ...\n", addr); /* Copy header so we can blank CRC field for re-calculation */ - memcpy (&header, (char *) addr, sizeof (image_header_t)); + memmove(&header, (char *)addr, sizeof(image_header_t)); - if (ntohl (hdr->ih_magic) != IH_MAGIC) { - printf ("Bad Magic Number\n"); - show_boot_progress (-10); - do_reset (cmdtp, flag, argc, argv); + 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); + len = sizeof(image_header_t); - checksum = ntohl (hdr->ih_hcrc); + checksum = ntohl(hdr->ih_hcrc); hdr->ih_hcrc = 0; - if (crc32 (0, (char *) data, len) != checksum) { - printf ("Bad Header Checksum\n"); - show_boot_progress (-11); - do_reset (cmdtp, flag, argc, argv); + 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); + SHOW_BOOT_PROGRESS(10); - print_image_hdr (hdr); + print_image_hdr(hdr); - data = addr + sizeof (image_header_t); - len = ntohl (hdr->ih_size); + 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 */ - printf (" Verifying Checksum ... "); - csum = crc32 (0, (char *) data, len); - if (csum != ntohl (hdr->ih_dcrc)) { - printf ("Bad Data CRC\n"); - show_boot_progress (-12); - do_reset (cmdtp, flag, argc, argv); + 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(); } - printf ("OK\n"); +#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); + SHOW_BOOT_PROGRESS(11); if ((hdr->ih_os != IH_OS_LINUX) || (hdr->ih_arch != IH_CPU_M68K) || (hdr->ih_type != IH_TYPE_RAMDISK)) { - printf ("No Linux M68K Ramdisk Image\n"); - show_boot_progress (-13); - do_reset (cmdtp, flag, argc, argv); + 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])) { - ulong tail = ntohl (len_ptr[0]) % 4; + u_long tail = ntohl(len_ptr[0]) % 4; int i; - show_boot_progress (13); + SHOW_BOOT_PROGRESS(13); /* skip kernel length and terminator */ data = (ulong) (&len_ptr[2]); @@ -138,130 +226,110 @@ void do_bootm_linux (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[], for (i = 1; len_ptr[i]; ++i) data += 4; /* add kernel length, and align */ - data += ntohl (len_ptr[0]); + data += ntohl(len_ptr[0]); if (tail) { data += 4 - tail; } - len = ntohl (len_ptr[1]); + len = ntohl(len_ptr[1]); } else { /* * no initrd image */ - show_boot_progress (14); + SHOW_BOOT_PROGRESS(14); - data = 0; + len = data = 0; } -#ifdef DEBUG if (!data) { - printf ("No initrd\n"); + debug("No initrd\n"); } -#endif if (data) { - initrd_start = data; - initrd_end = initrd_start + len; - } else { - initrd_start = 0; - initrd_end = 0; - } - - show_boot_progress (15); - -#ifdef DEBUG - printf ("## Transferring control to Linux (at address %08lx) ...\n", - (ulong) theKernel); -#endif - - linux_params_init (PHYSADDR (gd->bd->bi_boot_params), commandline); - - sprintf (env_buf, "%lu", gd->ram_size >> 20); - linux_env_set ("memsize", env_buf); - - sprintf (env_buf, "0x%08X", (uint) PHYSADDR (initrd_start)); - linux_env_set ("initrd_start", env_buf); - - sprintf (env_buf, "0x%X", (uint) (initrd_end - initrd_start)); - linux_env_set ("initrd_size", env_buf); - - sprintf (env_buf, "0x%08X", (uint) (gd->bd->bi_flashstart)); - linux_env_set ("flash_start", env_buf); - - sprintf (env_buf, "0x%X", (uint) (gd->bd->bi_flashsize)); - linux_env_set ("flash_size", env_buf); - - /* we assume that the kernel is in place */ - printf ("\nStarting kernel ...\n\n"); - - theKernel (linux_argc, linux_argv, linux_env, 0); -} - -static void linux_params_init (ulong start, char *line) -{ - char *next, *quote, *argp; - - linux_argc = 1; - linux_argv = (char **) start; - linux_argv[0] = 0; - argp = (char *) (linux_argv + LINUX_MAX_ARGS); - - next = line; - - while (line && *line && linux_argc < LINUX_MAX_ARGS) { - quote = strchr (line, '"'); - next = strchr (line, ' '); - - while (next != NULL && quote != NULL && quote < next) { - /* we found a left quote before the next blank - * now we have to find the matching right quote - */ - next = strchr (quote + 1, '"'); - if (next != NULL) { - quote = strchr (next + 1, '"'); - next = strchr (next + 1, ' '); + 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; } - } - if (next == NULL) { - next = line + strlen (line); + 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"); } - - linux_argv[linux_argc] = argp; - memcpy (argp, line, next - line); - argp[next - line] = 0; - - argp += next - line + 1; - linux_argc++; - - if (*next) - next++; - - line = next; + } else { + initrd_start = 0; + initrd_end = 0; } - linux_env = (char **) (((ulong) argp + 15) & ~15); - linux_env[0] = 0; - linux_env_p = (char *) (linux_env + LINUX_MAX_ENVS); - linux_env_idx = 0; -} - -static void linux_env_set (char *env_name, char *env_val) -{ - if (linux_env_idx < LINUX_MAX_ENVS - 1) { - linux_env[linux_env_idx] = linux_env_p; - - strcpy (linux_env_p, env_name); - linux_env_p += strlen (env_name); + debug("## Transferring control to Linux (at address %08lx) ...\n", + (ulong) kernel); - strcpy (linux_env_p, "="); - linux_env_p += 1; + SHOW_BOOT_PROGRESS(15); - strcpy (linux_env_p, env_val); - linux_env_p += strlen (env_val); - - linux_env_p++; - linux_env[++linux_env_idx] = 0; - } + /* + * 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 */ } |