Add cmd_spl command

This adds a spl command to the u-boot.

Related config:
CONFIG_CMD_SPL
	activate/deactivate the command
CONFIG_CMD_SPL_NAND_OFS
	Offset in NAND to use

Signed-off-by: Simon Schwarz <simonschwarzcor@gmail.com>
Signed-off-by: Stefano Babic <sbabic@denx.de>
CC: Tom Rini <tom.rini@gmail.com>
CC: Wolfgang Denk <wd@denx.de>

common/Makefile

@@ -162,6 +162,7 @@ COBJS-$(CONFIG_USB_STORAGE) += usb_storage.o
 endif
 COBJS-$(CONFIG_CMD_XIMG) += cmd_ximg.o
 COBJS-$(CONFIG_YAFFS2) += cmd_yaffs2.o
+COBJS-$(CONFIG_CMD_SPL) += cmd_spl.o
 
 # others
 ifdef CONFIG_DDR_SPD

common/cmd_spl.c

@@ -0,0 +1,188 @@
+/*
+ * Copyright (C) 2011
+ * Corscience GmbH & Co. KG - Simon Schwarz <schwarz@corscience.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_spl.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+static const char **subcmd_list[] = {
+
+	[SPL_EXPORT_FDT] = (const char * []) {
+#ifdef CONFIG_OF_LIBFDT
+		"start",
+		"loados",
+	#ifdef CONFIG_SYS_BOOT_RAMDISK_HIGH
+		"ramdisk",
+	#endif
+		"fdt",
+		"cmdline",
+		"bdt",
+		"prep",
+#endif
+		NULL,
+	},
+	[SPL_EXPORT_ATAGS] = (const char * []) {
+#if defined(CONFIG_SETUP_MEMORY_TAGS) || \
+	defined(CONFIG_CMDLINE_TAG) || \
+	defined(CONFIG_INITRD_TAG) || \
+	defined(CONFIG_SERIAL_TAG) || \
+	defined(CONFIG_REVISION_TAG)
+		"start",
+		"loados",
+#ifdef CONFIG_SYS_BOOT_RAMDISK_HIGH
+		"ramdisk",
+#endif
+		"cmdline",
+		"bdt",
+		"prep",
+#endif
+		NULL,
+	},
+	NULL
+};
+
+/* Calls bootm with the parameters given */
+static int call_bootm(int argc, char * const argv[], const char *subcommand[])
+{
+	char *bootm_argv[5];
+
+	int i = 0;
+	int ret = 0;
+	int j;
+
+	/* create paramter array */
+	bootm_argv[0] = "do_bootm";
+	switch (argc) {
+	case 3:
+		bootm_argv[4] = argv[2]; /* fdt addr */
+	case 2:
+		bootm_argv[3] = argv[1]; /* initrd addr */
+	case 1:
+		bootm_argv[2] = argv[0]; /* kernel addr */
+	}
+
+
+	/*
+	 * - do the work -
+	 * exec subcommands of do_bootm to init the images
+	 * data structure
+	 */
+	while (subcommand[i] != NULL) {
+		bootm_argv[1] = (char *)subcommand[i];
+		debug("args %d: %s %s ", argc, bootm_argv[0], bootm_argv[1]);
+		for (j = 0; j < argc; j++)
+			debug("%s ", bootm_argv[j + 2]);
+		debug("\n");
+
+		ret = do_bootm(find_cmd("do_bootm"), 0, argc+2,
+			bootm_argv);
+		debug("Subcommand retcode: %d\n", ret);
+		i++;
+	}
+
+	if (ret) {
+		printf("ERROR prep subcommand failed!\n");
+		return -1;
+	}
+
+	return 0;
+}
+
+static cmd_tbl_t cmd_spl_export_sub[] = {
+	U_BOOT_CMD_MKENT(fdt, 0, 1, (void *)SPL_EXPORT_FDT, "", ""),
+	U_BOOT_CMD_MKENT(atags, 0, 1, (void *)SPL_EXPORT_ATAGS, "", ""),
+};
+
+static int spl_export(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+{
+	const cmd_tbl_t *c;
+
+	if (argc < 2) /* no subcommand */
+		return cmd_usage(cmdtp);
+
+	c = find_cmd_tbl(argv[1], &cmd_spl_export_sub[0],
+		ARRAY_SIZE(cmd_spl_export_sub));
+	if ((c) && ((int)c->cmd <= SPL_EXPORT_LAST)) {
+		argc -= 2;
+		argv += 2;
+		if (call_bootm(argc, argv, subcmd_list[(int)c->cmd]))
+			return -1;
+		switch ((int)c->cmd) {
+		case SPL_EXPORT_FDT:
+			printf("Argument image is now in RAM: 0x%p\n",
+				(void *)images.ft_addr);
+			break;
+		case SPL_EXPORT_ATAGS:
+			printf("Argument image is now in RAM at: 0x%p\n",
+				(void *)gd->bd->bi_boot_params);
+			break;
+		}
+	} else {
+		/* Unrecognized command */
+		return cmd_usage(cmdtp);
+	}
+
+	return 0;
+}
+
+static cmd_tbl_t cmd_spl_sub[] = {
+	U_BOOT_CMD_MKENT(export, 0, 1, (void *)SPL_EXPORT, "", ""),
+};
+
+static int do_spl(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+{
+	const cmd_tbl_t *c;
+	int cmd;
+
+	if (argc < 2) /* no subcommand */
+		return cmd_usage(cmdtp);
+
+	c = find_cmd_tbl(argv[1], &cmd_spl_sub[0], ARRAY_SIZE(cmd_spl_sub));
+	if (c) {
+		cmd = (int)c->cmd;
+		switch (cmd) {
+		case SPL_EXPORT:
+			argc--;
+			argv++;
+			if (spl_export(cmdtp, flag, argc, argv))
+				printf("Subcommand failed\n");
+			break;
+		default:
+			/* unrecognized command */
+			return cmd_usage(cmdtp);
+		}
+	} else {
+		/* Unrecognized command */
+		return cmd_usage(cmdtp);
+	}
+	return 0;
+}
+
+U_BOOT_CMD(
+	spl, 6 , 1, do_spl, "SPL configuration",
+	"export <img=atags|fdt> [kernel_addr] [initrd_addr] "
+	"[fdt_addr if <img> = fdt] - export a kernel parameter image\n"
+	"\t initrd_img can be set to \"-\" if fdt_addr without initrd img is"
+	"used");

doc/README.commands.spl

@@ -0,0 +1,31 @@
+The spl command is used to export a boot parameter image to RAM. Later
+it may implement more functions connected to the SPL.
+
+SUBCOMMAND EXPORT
+To execute the command everything has to be in place as if bootm should be
+used. (kernel image, initrd-image, fdt-image etc.)
+
+export has two subcommands:
+	atags: exports the ATAGS
+	fdt: exports the FDT
+
+Call is:
+spl export <ftd|atags> [kernel_addr] [initrd_addr] [fdt_addr if fdt]
+
+
+TYPICAL CALL
+
+on OMAP3:
+nandecc hw
+nand read 0x82000000 0x280000 0x400000 	/* Read kernel image from NAND*/
+spl export atags 			/* export ATAGS */
+nand erase 0x680000 0x20000		/* erase - one page */
+nand write 0x80000100 0x680000 0x20000	/* write the image - one page */
+
+call with FDT:
+nandecc hw
+nand read 0x82000000 0x280000 0x400000 	/* Read kernel image from NAND*/
+tftpboot 0x80000100 devkit8000.dtb /* Read fdt */
+spl export fdt 0x82000000 - 0x80000100	/* export FDT */
+nand erase 0x680000 0x20000		/* erase - one page */
+nand write <adress shown by spl export> 0x680000 0x20000

include/cmd_spl.h

@@ -0,0 +1,31 @@
+/* Copyright (C) 2011
+ * Corscience GmbH & Co. KG - Simon Schwarz <schwarz@corscience.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
+ */
+#ifndef _NAND_SPL_H_
+#define	_NAND_SPL_H_
+
+#define SPL_EXPORT	(0x00000001)
+
+#define SPL_EXPORT_FDT		(0x00000001)
+#define SPL_EXPORT_ATAGS	(0x00000002)
+#define SPL_EXPORT_LAST		SPL_EXPORT_ATAGS
+
+#endif /* _NAND_SPL_H_ */

include/image.h

@@ -268,6 +268,8 @@ typedef struct bootm_headers {
 #endif
 } bootm_headers_t;
 
+extern bootm_headers_t images;
+
 /*
  * Some systems (for example LWMON) have very short watchdog periods;
  * we must make sure to split long operations like memmove() or