1 files changed, 274 insertions, 0 deletions
diff --git a/lib_m68k/m68k_linux.c b/lib_m68k/m68k_linux.c
new file mode 100644
index 0000000..b20393d
--- /dev/null
+++ b/lib_m68k/m68k_linux.c
@@ -0,0 +1,274 @@
+/*
+ * (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 <cmd_boot.h>
+#include <image.h>
+#include <zlib.h>
+#include <asm/byteorder.h>
+
+#define PHYSADDR(x) x
+
+#define	LINUX_MAX_ENVS		256
+#define	LINUX_MAX_ARGS		256
+
+#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;	/* from cmd_bootm.c */
+
+static int linux_argc;
+static char **linux_argv;
+
+static char **linux_env;
+static char *linux_env_p;
+static int linux_env_idx;
+
+static void linux_params_init (ulong start, char *commandline);
+static void linux_env_set (char *env_name, char *env_val);
+
+
+void do_bootm_linux (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[],
+		     ulong addr, ulong * len_ptr, int verify)
+{
+	DECLARE_GLOBAL_DATA_PTR;
+
+	ulong len = 0, checksum;
+	ulong initrd_start, initrd_end;
+	ulong data;
+	void (*theKernel) (int, char **, char **, int *);
+	image_header_t *hdr = &header;
+	char *commandline = getenv ("bootargs");
+	char env_buf[12];
+
+	theKernel =
+		(void (*)(int, char **, char **, int *)) ntohl (hdr->ih_ep);
+
+	/*
+	 * Check if there is an initrd image
+	 */
+	if (argc >= 3) {
+		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 */
+		memcpy (&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);
+		}
+
+		data = (ulong) & header;
+		len = sizeof (image_header_t);
+
+		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);
+		}
+
+		SHOW_BOOT_PROGRESS (10);
+
+		print_image_hdr (hdr);
+
+		data = addr + sizeof (image_header_t);
+		len = ntohl (hdr->ih_size);
+
+		if (verify) {
+			ulong csum = 0;
+
+			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);
+			}
+			printf ("OK\n");
+		}
+
+		SHOW_BOOT_PROGRESS (11);
+
+		if ((hdr->ih_os != IH_OS_LINUX) ||
+		    (hdr->ih_arch != IH_CPU_MIPS) ||
+		    (hdr->ih_type != IH_TYPE_RAMDISK)) {
+			printf ("No Linux MIPS 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;
+		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);
+
+		data = 0;
+	}
+
+#ifdef	DEBUG
+	if (!data) {
+		printf ("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 (next == NULL) {
+			next = line + strlen (line);
+		}
+
+		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;
+	}
+
+	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);
+
+		strcpy (linux_env_p, "=");
+		linux_env_p += 1;
+
+		strcpy (linux_env_p, env_val);
+		linux_env_p += strlen (env_val);
+
+		linux_env_p++;
+		linux_env[++linux_env_idx] = 0;
+	}
+}