lib_arm/bootm.c - uboot/qsr1000 - Git at Google

 /*
  * (C) Copyright 2002
  * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
  * Marius Groeger <mgroeger@sysgo.de>
  *
  * Copyright (C) 2001  Erik Mouw (J.A.K.Mouw@its.tudelft.nl)
  *
  * 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 <u-boot/zlib.h>
 #include <asm/byteorder.h>

 DECLARE_GLOBAL_DATA_PTR;

 #if defined (CONFIG_SETUP_MEMORY_TAGS) || \
     defined (CONFIG_CMDLINE_TAG) || \
     defined (CONFIG_INITRD_TAG) || \
     defined (CONFIG_SERIAL_TAG) || \
     defined (CONFIG_REVISION_TAG) || \
     defined (CONFIG_VFD) || \
     defined (CONFIG_LCD)
 static void setup_start_tag (bd_t *bd);

 # ifdef CONFIG_SETUP_MEMORY_TAGS
 static void setup_memory_tags (bd_t *bd);
 # endif
 static void setup_commandline_tag (bd_t *bd, char *commandline);

 # ifdef CONFIG_INITRD_TAG
 static void setup_initrd_tag (bd_t *bd, ulong initrd_start,
 			      ulong initrd_end);
 # endif
 static void setup_end_tag (bd_t *bd);

 # if defined (CONFIG_VFD) || defined (CONFIG_LCD)
 static void setup_videolfb_tag (gd_t *gd);
 # endif

 static struct tag *params;
 #endif /* CONFIG_SETUP_MEMORY_TAGS || CONFIG_CMDLINE_TAG || CONFIG_INITRD_TAG */

 int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images)
 {
 	bd_t	*bd = gd->bd;
 	char	*s;
 	int	machid = bd->bi_arch_number;
 	void	(*theKernel)(int zero, int arch, uint params);

 #ifdef CONFIG_CMDLINE_TAG
 	char *commandline = getenv ("bootargs");
 #endif

 	if ((flag != 0) && (flag != BOOTM_STATE_OS_GO))
 		return 1;

 	theKernel = (void (*)(int, int, uint))images->ep;

 	s = getenv ("machid");
 	if (s) {
 		machid = simple_strtoul (s, NULL, 16);
 		printf ("Using machid 0x%x from environment\n", machid);
 	}

 	show_boot_progress (15);

 	debug ("## Transferring control to Linux (at address %08lx) ...\n",
 	       (ulong) theKernel);

 #if defined (CONFIG_SETUP_MEMORY_TAGS) || \
     defined (CONFIG_CMDLINE_TAG) || \
     defined (CONFIG_INITRD_TAG) || \
     defined (CONFIG_SERIAL_TAG) || \
     defined (CONFIG_REVISION_TAG) || \
     defined (CONFIG_LCD) || \
     defined (CONFIG_VFD)
 	setup_start_tag (bd);
 #ifdef CONFIG_SERIAL_TAG
 	setup_serial_tag (&params);
 #endif
 #ifdef CONFIG_REVISION_TAG
 	setup_revision_tag (&params);
 #endif
 #ifdef CONFIG_SETUP_MEMORY_TAGS
 	setup_memory_tags (bd);
 #endif
 #ifdef CONFIG_CMDLINE_TAG
 	setup_commandline_tag (bd, commandline);
 #endif
 #ifdef CONFIG_INITRD_TAG
 	if (images->rd_start && images->rd_end)
 		setup_initrd_tag (bd, images->rd_start, images->rd_end);
 #endif
 #if defined (CONFIG_VFD) || defined (CONFIG_LCD)
 	setup_videolfb_tag ((gd_t *) gd);
 #endif
 	setup_end_tag (bd);
 #endif

 	/* we assume that the kernel is in place */
 	printf ("\nStarting kernel ...\n\n");

 #ifdef CONFIG_USB_DEVICE
 	{
 		extern void udc_disconnect (void);
 		udc_disconnect ();
 	}
 #endif

 	cleanup_before_linux ();

 	theKernel (0, machid, bd->bi_boot_params);
 	/* does not return */

 	return 1;
 }


 #if defined (CONFIG_SETUP_MEMORY_TAGS) || \
     defined (CONFIG_CMDLINE_TAG) || \
     defined (CONFIG_INITRD_TAG) || \
     defined (CONFIG_SERIAL_TAG) || \
     defined (CONFIG_REVISION_TAG) || \
     defined (CONFIG_LCD) || \
     defined (CONFIG_VFD)
 static void setup_start_tag (bd_t *bd)
 {
 	params = (struct tag *) bd->bi_boot_params;

 	params->hdr.tag = ATAG_CORE;
 	params->hdr.size = tag_size (tag_core);

 	params->u.core.flags = 0;
 	params->u.core.pagesize = 0;
 	params->u.core.rootdev = 0;

 	params = tag_next (params);
 }


 #ifdef CONFIG_SETUP_MEMORY_TAGS
 static void setup_memory_tags (bd_t *bd)
 {
 	int i;

 	for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
 		params->hdr.tag = ATAG_MEM;
 		params->hdr.size = tag_size (tag_mem32);

 		params->u.mem.start = bd->bi_dram[i].start;
 		params->u.mem.size = bd->bi_dram[i].size;

 		params = tag_next (params);
 	}
 }
 #endif /* CONFIG_SETUP_MEMORY_TAGS */


 static void setup_commandline_tag (bd_t *bd, char *commandline)
 {
 	char *p;

 	if (!commandline)
 		return;

 	/* eat leading white space */
 	for (p = commandline; *p == ' '; p++);

 	/* skip non-existent command lines so the kernel will still
 	 * use its default command line.
 	 */
 	if (*p == '\0')
 		return;

 	params->hdr.tag = ATAG_CMDLINE;
 	params->hdr.size =
 		(sizeof (struct tag_header) + strlen (p) + 1 + 4) >> 2;

 	strcpy (params->u.cmdline.cmdline, p);

 	params = tag_next (params);
 }


 #ifdef CONFIG_INITRD_TAG
 static void setup_initrd_tag (bd_t *bd, ulong initrd_start, ulong initrd_end)
 {
 	/* an ATAG_INITRD node tells the kernel where the compressed
 	 * ramdisk can be found. ATAG_RDIMG is a better name, actually.
 	 */
 	params->hdr.tag = ATAG_INITRD2;
 	params->hdr.size = tag_size (tag_initrd);

 	params->u.initrd.start = initrd_start;
 	params->u.initrd.size = initrd_end - initrd_start;

 	params = tag_next (params);
 }
 #endif /* CONFIG_INITRD_TAG */


 #if defined (CONFIG_VFD) || defined (CONFIG_LCD)
 extern ulong calc_fbsize (void);
 static void setup_videolfb_tag (gd_t *gd)
 {
 	/* An ATAG_VIDEOLFB node tells the kernel where and how large
 	 * the framebuffer for video was allocated (among other things).
 	 * Note that a _physical_ address is passed !
 	 *
 	 * We only use it to pass the address and size, the other entries
 	 * in the tag_videolfb are not of interest.
 	 */
 	params->hdr.tag = ATAG_VIDEOLFB;
 	params->hdr.size = tag_size (tag_videolfb);

 	params->u.videolfb.lfb_base = (u32) gd->fb_base;
 	/* Fb size is calculated according to parameters for our panel
 	 */
 	params->u.videolfb.lfb_size = calc_fbsize();

 	params = tag_next (params);
 }
 #endif /* CONFIG_VFD || CONFIG_LCD */

 #ifdef CONFIG_SERIAL_TAG
 void setup_serial_tag (struct tag **tmp)
 {
 	struct tag *params = *tmp;
 	struct tag_serialnr serialnr;
 	void get_board_serial(struct tag_serialnr *serialnr);

 	get_board_serial(&serialnr);
 	params->hdr.tag = ATAG_SERIAL;
 	params->hdr.size = tag_size (tag_serialnr);
 	params->u.serialnr.low = serialnr.low;
 	params->u.serialnr.high= serialnr.high;
 	params = tag_next (params);
 	*tmp = params;
 }
 #endif

 #ifdef CONFIG_REVISION_TAG
 void setup_revision_tag(struct tag **in_params)
 {
 	u32 rev = 0;
 	u32 get_board_rev(void);

 	rev = get_board_rev();
 	params->hdr.tag = ATAG_REVISION;
 	params->hdr.size = tag_size (tag_revision);
 	params->u.revision.rev = rev;
 	params = tag_next (params);
 }
 #endif  /* CONFIG_REVISION_TAG */


 static void setup_end_tag (bd_t *bd)
 {
 	params->hdr.tag = ATAG_NONE;
 	params->hdr.size = 0;
 }

 #endif /* CONFIG_SETUP_MEMORY_TAGS || CONFIG_CMDLINE_TAG || CONFIG_INITRD_TAG */
	/*
	* (C) Copyright 2002
	* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
	* Marius Groeger <mgroeger@sysgo.de>
	*
	* Copyright (C) 2001 Erik Mouw (J.A.K.Mouw@its.tudelft.nl)
	*
	* 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 <u-boot/zlib.h>
	#include <asm/byteorder.h>

	DECLARE_GLOBAL_DATA_PTR;

	#if defined (CONFIG_SETUP_MEMORY_TAGS) \|\| \
	defined (CONFIG_CMDLINE_TAG) \|\| \
	defined (CONFIG_INITRD_TAG) \|\| \
	defined (CONFIG_SERIAL_TAG) \|\| \
	defined (CONFIG_REVISION_TAG) \|\| \
	defined (CONFIG_VFD) \|\| \
	defined (CONFIG_LCD)
	static void setup_start_tag (bd_t *bd);

	# ifdef CONFIG_SETUP_MEMORY_TAGS
	static void setup_memory_tags (bd_t *bd);
	# endif
	static void setup_commandline_tag (bd_t bd, char commandline);

	# ifdef CONFIG_INITRD_TAG
	static void setup_initrd_tag (bd_t *bd, ulong initrd_start,
	ulong initrd_end);
	# endif
	static void setup_end_tag (bd_t *bd);

	# if defined (CONFIG_VFD) \|\| defined (CONFIG_LCD)
	static void setup_videolfb_tag (gd_t *gd);
	# endif

	static struct tag *params;
	#endif /* CONFIG_SETUP_MEMORY_TAGS \|\| CONFIG_CMDLINE_TAG \|\| CONFIG_INITRD_TAG */

	int do_bootm_linux(int flag, int argc, char argv[], bootm_headers_t images)
	{
	bd_t *bd = gd->bd;
	char *s;
	int machid = bd->bi_arch_number;
	void (*theKernel)(int zero, int arch, uint params);

	#ifdef CONFIG_CMDLINE_TAG
	char *commandline = getenv ("bootargs");
	#endif

	if ((flag != 0) && (flag != BOOTM_STATE_OS_GO))
	return 1;

	theKernel = (void (*)(int, int, uint))images->ep;

	s = getenv ("machid");
	if (s) {
	machid = simple_strtoul (s, NULL, 16);
	printf ("Using machid 0x%x from environment\n", machid);
	}

	show_boot_progress (15);

	debug ("## Transferring control to Linux (at address %08lx) ...\n",
	(ulong) theKernel);

	#if defined (CONFIG_SETUP_MEMORY_TAGS) \|\| \
	defined (CONFIG_CMDLINE_TAG) \|\| \
	defined (CONFIG_INITRD_TAG) \|\| \
	defined (CONFIG_SERIAL_TAG) \|\| \
	defined (CONFIG_REVISION_TAG) \|\| \
	defined (CONFIG_LCD) \|\| \
	defined (CONFIG_VFD)
	setup_start_tag (bd);
	#ifdef CONFIG_SERIAL_TAG
	setup_serial_tag (&params);
	#endif
	#ifdef CONFIG_REVISION_TAG
	setup_revision_tag (&params);
	#endif
	#ifdef CONFIG_SETUP_MEMORY_TAGS
	setup_memory_tags (bd);
	#endif
	#ifdef CONFIG_CMDLINE_TAG
	setup_commandline_tag (bd, commandline);
	#endif
	#ifdef CONFIG_INITRD_TAG
	if (images->rd_start && images->rd_end)
	setup_initrd_tag (bd, images->rd_start, images->rd_end);
	#endif
	#if defined (CONFIG_VFD) \|\| defined (CONFIG_LCD)
	setup_videolfb_tag ((gd_t *) gd);
	#endif
	setup_end_tag (bd);
	#endif

	/* we assume that the kernel is in place */
	printf ("\nStarting kernel ...\n\n");

	#ifdef CONFIG_USB_DEVICE
	{
	extern void udc_disconnect (void);
	udc_disconnect ();
	}
	#endif

	cleanup_before_linux ();

	theKernel (0, machid, bd->bi_boot_params);
	/* does not return */

	return 1;
	}


	#if defined (CONFIG_SETUP_MEMORY_TAGS) \|\| \
	defined (CONFIG_CMDLINE_TAG) \|\| \
	defined (CONFIG_INITRD_TAG) \|\| \
	defined (CONFIG_SERIAL_TAG) \|\| \
	defined (CONFIG_REVISION_TAG) \|\| \
	defined (CONFIG_LCD) \|\| \
	defined (CONFIG_VFD)
	static void setup_start_tag (bd_t *bd)
	{
	params = (struct tag *) bd->bi_boot_params;

	params->hdr.tag = ATAG_CORE;
	params->hdr.size = tag_size (tag_core);

	params->u.core.flags = 0;
	params->u.core.pagesize = 0;
	params->u.core.rootdev = 0;

	params = tag_next (params);
	}


	#ifdef CONFIG_SETUP_MEMORY_TAGS
	static void setup_memory_tags (bd_t *bd)
	{
	int i;

	for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
	params->hdr.tag = ATAG_MEM;
	params->hdr.size = tag_size (tag_mem32);

	params->u.mem.start = bd->bi_dram[i].start;
	params->u.mem.size = bd->bi_dram[i].size;

	params = tag_next (params);
	}
	}
	#endif /* CONFIG_SETUP_MEMORY_TAGS */


	static void setup_commandline_tag (bd_t bd, char commandline)
	{
	char *p;

	if (!commandline)
	return;

	/* eat leading white space */
	for (p = commandline; *p == ' '; p++);

	/* skip non-existent command lines so the kernel will still
	* use its default command line.
	*/
	if (*p == '\0')
	return;

	params->hdr.tag = ATAG_CMDLINE;
	params->hdr.size =
	(sizeof (struct tag_header) + strlen (p) + 1 + 4) >> 2;

	strcpy (params->u.cmdline.cmdline, p);

	params = tag_next (params);
	}


	#ifdef CONFIG_INITRD_TAG
	static void setup_initrd_tag (bd_t *bd, ulong initrd_start, ulong initrd_end)
	{
	/* an ATAG_INITRD node tells the kernel where the compressed
	* ramdisk can be found. ATAG_RDIMG is a better name, actually.
	*/
	params->hdr.tag = ATAG_INITRD2;
	params->hdr.size = tag_size (tag_initrd);

	params->u.initrd.start = initrd_start;
	params->u.initrd.size = initrd_end - initrd_start;

	params = tag_next (params);
	}
	#endif /* CONFIG_INITRD_TAG */


	#if defined (CONFIG_VFD) \|\| defined (CONFIG_LCD)
	extern ulong calc_fbsize (void);
	static void setup_videolfb_tag (gd_t *gd)
	{
	/* An ATAG_VIDEOLFB node tells the kernel where and how large
	* the framebuffer for video was allocated (among other things).
	* Note that a _physical_ address is passed !
	*
	* We only use it to pass the address and size, the other entries
	* in the tag_videolfb are not of interest.
	*/
	params->hdr.tag = ATAG_VIDEOLFB;
	params->hdr.size = tag_size (tag_videolfb);

	params->u.videolfb.lfb_base = (u32) gd->fb_base;
	/* Fb size is calculated according to parameters for our panel
	*/
	params->u.videolfb.lfb_size = calc_fbsize();

	params = tag_next (params);
	}
	#endif /* CONFIG_VFD \|\| CONFIG_LCD */

	#ifdef CONFIG_SERIAL_TAG
	void setup_serial_tag (struct tag **tmp)
	{
	struct tag params = tmp;
	struct tag_serialnr serialnr;
	void get_board_serial(struct tag_serialnr *serialnr);

	get_board_serial(&serialnr);
	params->hdr.tag = ATAG_SERIAL;
	params->hdr.size = tag_size (tag_serialnr);
	params->u.serialnr.low = serialnr.low;
	params->u.serialnr.high= serialnr.high;
	params = tag_next (params);
	*tmp = params;
	}
	#endif

	#ifdef CONFIG_REVISION_TAG
	void setup_revision_tag(struct tag **in_params)
	{
	u32 rev = 0;
	u32 get_board_rev(void);

	rev = get_board_rev();
	params->hdr.tag = ATAG_REVISION;
	params->hdr.size = tag_size (tag_revision);
	params->u.revision.rev = rev;
	params = tag_next (params);
	}
	#endif /* CONFIG_REVISION_TAG */


	static void setup_end_tag (bd_t *bd)
	{
	params->hdr.tag = ATAG_NONE;
	params->hdr.size = 0;
	}

	#endif /* CONFIG_SETUP_MEMORY_TAGS \|\| CONFIG_CMDLINE_TAG \|\| CONFIG_INITRD_TAG */