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Diffstat (limited to 'lib_m68k/m68k_linux.c')
-rw-r--r--lib_m68k/m68k_linux.c378
1 files changed, 224 insertions, 154 deletions
diff --git a/lib_m68k/m68k_linux.c b/lib_m68k/m68k_linux.c
index 6c194f8..bea9744 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 +36,190 @@ 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 +227,111 @@ 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 */
}
generated by cgit v1.1 at 2024-11-23 16:22:11 +0000