lib_mips/mips_linux.c - u-boot - Git at Google

 /*
  * (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 <asm/byteorder.h>
 #include <asm/addrspace.h>

 #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 */

 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;

 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);

 #ifdef CONFIG_MEMSIZE_IN_BYTES
 	sprintf (env_buf, "%lu", gd->ram_size);
 #ifdef DEBUG
 	printf ("## Giving linux memsize in bytes, %lu\n", gd->ram_size);
 #endif
 #else
 	sprintf (env_buf, "%lu", gd->ram_size >> 20);
 #ifdef DEBUG
 	printf ("## Giving linux memsize in MB, %lu\n", gd->ram_size >> 20);
 #endif
 #endif /* CONFIG_MEMSIZE_IN_BYTES */

 	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;
 	}
 }
	/*
	* (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 <asm/byteorder.h>
	#include <asm/addrspace.h>

	#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 */

	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;

	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);

	#ifdef CONFIG_MEMSIZE_IN_BYTES
	sprintf (env_buf, "%lu", gd->ram_size);
	#ifdef DEBUG
	printf ("## Giving linux memsize in bytes, %lu\n", gd->ram_size);
	#endif
	#else
	sprintf (env_buf, "%lu", gd->ram_size >> 20);
	#ifdef DEBUG
	printf ("## Giving linux memsize in MB, %lu\n", gd->ram_size >> 20);
	#endif
	#endif /* CONFIG_MEMSIZE_IN_BYTES */

	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;
	}
	}