mkimage: add UBL header support for booting davinci cpus

creating an u-boot.ubl file, which contains the UBL Header
needed for booting from NAND with the RBL from TI. For more
information read doc/README.ublimage.

Signed-off-by: Heiko Schocher <hs@denx.de>

.gitignore

@@ -33,6 +33,7 @@
 /u-boot.sha1
 /u-boot.dis
 /u-boot.lds
+/u-boot.ubl
 
 #
 # Generated files

Makefile

@@ -394,6 +394,10 @@ $(obj)u-boot.sha1:	$(obj)u-boot.bin
 $(obj)u-boot.dis:	$(obj)u-boot
 		$(OBJDUMP) -d $< > $@
 
+$(obj)u-boot.ubl:       $(obj)u-boot-nand.bin
+		$(obj)tools/mkimage -n $(UBL_CONFIG) -T ublimage \
+		-e $(CONFIG_SYS_TEXT_BASE) -d $< $@
+
 GEN_UBOOT = \
 		UNDEF_SYM=`$(OBJDUMP) -x $(LIBBOARD) $(LIBS) | \
 		sed  -n -e 's/.*\($(SYM_PREFIX)__u_boot_cmd_.*\)/-u\1/p'|sort|uniq`;\
@@ -1102,6 +1106,7 @@ clobber:	clean
 	@rm -f $(obj)u-boot $(obj)u-boot.map $(obj)u-boot.hex $(ALL-y)
 	@rm -f $(obj)u-boot.kwb
 	@rm -f $(obj)u-boot.imx
+	@rm -f $(obj)u-boot.ubl
 	@rm -f $(obj)tools/{env/crc32.c,inca-swap-bytes}
 	@rm -f $(obj)arch/powerpc/cpu/mpc824x/bedbug_603e.c
 	@rm -fr $(obj)include/asm/proc $(obj)include/asm/arch $(obj)include/asm

common/image.c

@@ -141,6 +141,7 @@ static const table_entry_t uimage_type[] = {
 	{	IH_TYPE_FLATDT,     "flat_dt",    "Flat Device Tree",	},
 	{	IH_TYPE_KWBIMAGE,   "kwbimage",   "Kirkwood Boot Image",},
 	{	IH_TYPE_IMXIMAGE,   "imximage",   "Freescale i.MX Boot Image",},
+	{	IH_TYPE_UBLIMAGE,   "ublimage",   "Davinci UBL image",},
 	{	-1,		    "",		  "",			},
 };
 

doc/README.ublimage

@@ -0,0 +1,141 @@
+---------------------------------------------
+UBL image Boot Image generation using mkimage
+---------------------------------------------
+
+This document describes how to set up an U-Boot image that can be directly
+booted by a DaVinci processor via NAND boot mode, using an UBL header,
+but without need for UBL.
+
+For more details see section 11.2 "ARM ROM Boot Modes" of
+http://focus.ti.com/lit/ug/sprufg5a/sprufg5a.pdf
+
+Command syntax:
+--------------
+./tools/mkimage -l <u-boot_file>
+		to list the UBL image file details
+
+./tools/mkimage -T ublimage \
+		-n <board specific configuration file> \
+		-d <u-boot binary>  <output image file>
+
+For example, for the davinci dm365evm board:
+./tools/mkimage -n ./board/davinci/dm365evm/ublimage.cfg \
+		-T ublimage \
+		-d u-boot-nand.bin u-boot.ubl
+
+You can generate the image directly when you compile u-boot with:
+
+$ make u-boot.ubl
+
+The output image can be flashed into the NAND.
+
+Please check the DaVinci documentation for further details.
+
+Board specific configuration file specifications:
+-------------------------------------------------
+1. This file must present in the $(BOARDDIR) and the name should be
+	ublimage.cfg (since this is used in Makefile).
+2. This file can have empty lines and lines starting with "#" as first
+	character to put comments.
+3. This file can have configuration command lines as mentioned below,
+	any other information in this file is treated as invalid.
+
+Configuration command line syntax:
+---------------------------------
+1. Each command line must have two strings, first one command or address
+	and second one data string
+2. Following are the valid command strings and associated data strings:-
+	Command string		data string
+	--------------		-----------
+	MODE			UBL special mode, on of:
+				safe
+				Example:
+				MODE	safe
+
+	ENTRY			Entry point address for the user
+				bootloader (absolute address) = TEXT_BASE
+				nand_spl loader.
+				Example:
+				ENTRY	0x00000020
+
+	PAGES			Number of pages (size of user bootloader
+				in number of pages)
+				Example:
+				PAGES	27
+
+	START_BLOCK		Block number where user bootloader is present
+				Example:
+				START_BLOCK	5
+
+	START_PAGE		Page number where user bootloader is present
+				(for RBL always 0)
+				Example:
+				START_PAGE	0
+
+------------------------------------------------
+
+Structure of the u-boot.ubl binary:
+
+compile steps:
+
+1) nand_spl code compile, with pad_to = (TEXT_BASE +
+   (CONFIG_SYS_NROF_PAGES_NAND_SPL * pagesize))
+   Example: cam_enc_4xx pad_to = 0x20 + (6 * 0x800) = 0x3020 = 12320
+   -> u-boot-spl-16k.bin
+
+   !! TEXT_BASE = 0x20, as the RBL starts at 0x20
+
+2) compile u-boot.bin ("normal" u-boot)
+   -> u-boot.bin
+
+3) create u-boot-nand.bin = u-boot-spl-16k.bin + u-boot.bin
+
+4) create u-boot.ubl, size = 1 page size NAND
+   create UBL header and paste it before u-boot.bin
+
+This steps are done automagically if you do a "make all"
+
+-> You get an u-boot.ubl binary, which you can flash
+   into your NAND.
+
+Structure of this binary (Example for the cam_enc_4xx board with a NAND
+page size = 0x800):
+
+offset :    0x00000 | 0x800       | 0x3800
+content:    UBL     | nand_spl    | u-boot code
+            Header  | code        |
+
+The NAND layout looks for example like this:
+
+(Example for the cam_enc_4xx board with a NAND page size = 0x800, block
+size = 0x20000 and CONFIG_SYS_NROF_UBL_HEADER 5):
+
+offset :    0x80000 | 0xa0000     | 0xa3000
+content:    UBL     | nand_spl    | u-boot code
+            Header  | code        |
+            ^         ^
+	    ^         0xa0000 = CONFIG_SYS_NROF_UBL_HEADER * 0x20000
+            ^
+            0x80000 = Block 4 * 0x20000
+
+If the cpu starts in NAND boot mode, it checks the UBL descriptor
+starting with block 1 (page 0).  When a valid UBL signature is found,
+the corresponding block number (from 1 to 24) is written to the last 32
+bits of ARM internal memory (0x7ffc-0x8000).  This feature is provided
+as a basic debug mechanism.  If not found, it continues with block 2
+... last possible block is 24
+
+If a valid UBL descriptor is found, the UBL descriptor is read and
+processed.  The descriptor gives the information required for loading
+and control transfer to the nand_spl code.  The nand_spl code is then
+read and processed.
+
+Once the user-specified start-up conditions are set, the RBL copies the
+nand_spl into ARM internal RAM, starting at address 0x0000: 0020.
+                                                            ^^^^
+
+The nand_spl code itself now does necessary intializations, and at least,
+copies the u-boot code from NAND into RAM, and jumps to it ...
+
+------------------------------------------------
+Author: Heiko Schocher <hs@denx.de>

include/image.h

@@ -157,6 +157,7 @@
 #define IH_TYPE_FLATDT		8	/* Binary Flat Device Tree Blob	*/
 #define IH_TYPE_KWBIMAGE	9	/* Kirkwood Boot Image		*/
 #define IH_TYPE_IMXIMAGE	10	/* Freescale IMXBoot Image	*/
+#define IH_TYPE_UBLIMAGE	11	/* Davinci UBL Image		*/
 
 /*
  * Compression Types

tools/Makefile

@@ -92,6 +92,7 @@ NOPED_OBJ_FILES-y += mkimage.o
 OBJ_FILES-$(CONFIG_NETCONSOLE) += ncb.o
 NOPED_OBJ_FILES-y += os_support.o
 OBJ_FILES-$(CONFIG_SHA1_CHECK_UB_IMG) += ubsha1.o
+NOPED_OBJ_FILES-y += ublimage.o
 
 # Don't build by default
 #ifeq ($(ARCH),ppc)
@@ -192,6 +193,7 @@ $(obj)mkimage$(SFX):	$(obj)crc32.o \
 			$(obj)mkimage.o \
 			$(obj)os_support.o \
 			$(obj)sha1.o \
+			$(obj)ublimage.o \
 			$(LIBFDT_OBJS)
 	$(HOSTCC) $(HOSTCFLAGS) $(HOSTLDFLAGS) -o $@ $^
 	$(HOSTSTRIP) $@

tools/mkimage.c

@@ -158,6 +158,8 @@ main (int argc, char **argv)
 	init_fit_image_type ();
 	/* Init Default image generation/list support */
 	init_default_image_type ();
+	/* Init Davinci UBL support */
+	init_ubl_image_type();
 
 	params.cmdname = *argv;
 	params.addr = params.ep = 0;

tools/mkimage.h

@@ -143,5 +143,6 @@ void init_kwb_image_type (void);
 void init_imx_image_type (void);
 void init_default_image_type (void);
 void init_fit_image_type (void);
+void init_ubl_image_type(void);
 
 #endif /* _MKIIMAGE_H_ */

tools/ublimage.c

@@ -0,0 +1,275 @@
+/*
+ * (C) Copyright 2011
+ * Heiko Schocher, DENX Software Engineering, hs@denx.de.
+ *
+ * Based on:
+ * (C) Copyright 2009
+ * Stefano Babic, DENX Software Engineering, sbabic@denx.de.
+ *
+ * (C) Copyright 2008
+ * Marvell Semiconductor <www.marvell.com>
+ * Written-by: Prafulla Wadaskar <prafulla@marvell.com>
+ *
+ * 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
+ */
+
+/* Required to obtain the getline prototype from stdio.h */
+#define _GNU_SOURCE
+
+#include "mkimage.h"
+#include <image.h>
+#include "ublimage.h"
+
+/*
+ * Supported commands for configuration file
+ */
+static table_entry_t ublimage_cmds[] = {
+	{CMD_BOOT_MODE,	"MODE",		"UBL special modes", },
+	{CMD_ENTRY,	"ENTRY",	"Entry point addr for bootloader", },
+	{CMD_PAGE,	"PAGES",
+		"number of pages (size of bootloader)", },
+	{CMD_ST_BLOCK,	"START_BLOCK",
+		"block number where bootloader is present", },
+	{CMD_ST_PAGE,	"START_PAGE",
+		"page number where bootloader is present", },
+	{CMD_LD_ADDR,	"LD_ADDR",
+		"load addr", },
+	{-1,		"",		"", },
+};
+
+/*
+ * Supported Boot options for configuration file
+ * this is needed to set the correct flash offset
+ */
+static table_entry_t ublimage_bootops[] = {
+	{UBL_MAGIC_SAFE,	"safe",	"Safe boot mode",	},
+	{-1,			"",	"Invalid",		},
+};
+
+static struct ubl_header ublimage_header;
+
+static uint32_t get_cfg_value(char *token, char *name,  int linenr)
+{
+	char *endptr;
+	uint32_t value;
+
+	errno = 0;
+	value = strtoul(token, &endptr, 16);
+	if (errno || (token == endptr)) {
+		fprintf(stderr, "Error: %s[%d] - Invalid hex data(%s)\n",
+			name,  linenr, token);
+		exit(EXIT_FAILURE);
+	}
+	return value;
+}
+
+static void print_hdr(struct ubl_header *ubl_hdr)
+{
+	printf("Image Type : Davinci UBL Boot Image\n");
+	printf("UBL magic  : %08x\n", ubl_hdr->magic);
+	printf("Entry Point: %08x\n", ubl_hdr->entry);
+	printf("nr of pages: %08x\n", ubl_hdr->pages);
+	printf("start block: %08x\n", ubl_hdr->block);
+	printf("start page : %08x\n", ubl_hdr->page);
+}
+
+static void parse_cfg_cmd(struct ubl_header *ublhdr, int32_t cmd, char *token,
+				char *name, int lineno, int fld, int dcd_len)
+{
+	static int cmd_ver_first = ~0;
+
+	switch (cmd) {
+	case CMD_BOOT_MODE:
+		ublhdr->magic = get_table_entry_id(ublimage_bootops,
+					"ublimage special boot mode", token);
+		if (ublhdr->magic == -1) {
+			fprintf(stderr, "Error: %s[%d] -Invalid boot mode"
+				"(%s)\n", name, lineno, token);
+			exit(EXIT_FAILURE);
+		}
+		ublhdr->magic += UBL_MAGIC_BASE;
+		if (unlikely(cmd_ver_first != 1))
+			cmd_ver_first = 0;
+		break;
+	case CMD_ENTRY:
+		ublhdr->entry = get_cfg_value(token, name, lineno);
+		break;
+	case CMD_PAGE:
+		ublhdr->pages = get_cfg_value(token, name, lineno);
+		break;
+	case CMD_ST_BLOCK:
+		ublhdr->block = get_cfg_value(token, name, lineno);
+		break;
+	case CMD_ST_PAGE:
+		ublhdr->page = get_cfg_value(token, name, lineno);
+		break;
+	case CMD_LD_ADDR:
+		ublhdr->pll_m = get_cfg_value(token, name, lineno);
+		break;
+	}
+}
+
+static void parse_cfg_fld(struct ubl_header *ublhdr, int32_t *cmd,
+		char *token, char *name, int lineno, int fld, int *dcd_len)
+{
+
+	switch (fld) {
+	case CFG_COMMAND:
+		*cmd = get_table_entry_id(ublimage_cmds,
+			"ublimage commands", token);
+		if (*cmd < 0) {
+			fprintf(stderr, "Error: %s[%d] - Invalid command"
+			"(%s)\n", name, lineno, token);
+			exit(EXIT_FAILURE);
+		}
+		break;
+	case CFG_REG_VALUE:
+		parse_cfg_cmd(ublhdr, *cmd, token, name, lineno, fld, *dcd_len);
+		break;
+	default:
+		break;
+	}
+}
+static uint32_t parse_cfg_file(struct ubl_header *ublhdr, char *name)
+{
+	FILE *fd = NULL;
+	char *line = NULL;
+	char *token, *saveptr1, *saveptr2;
+	int lineno = 0;
+	int	i;
+	char *ptr = (char *)ublhdr;
+	int fld;
+	size_t len;
+	int dcd_len = 0;
+	int32_t cmd;
+	int ublhdrlen = sizeof(struct ubl_header);
+
+	fd = fopen(name, "r");
+	if (fd == 0) {
+		fprintf(stderr, "Error: %s - Can't open DCD file\n", name);
+		exit(EXIT_FAILURE);
+	}
+
+	/* Fill header with 0xff */
+	for (i = 0; i < ublhdrlen; i++) {
+		*ptr = 0xff;
+		ptr++;
+	}
+
+	/*
+	 * Very simple parsing, line starting with # are comments
+	 * and are dropped
+	 */
+	while ((getline(&line, &len, fd)) > 0) {
+		lineno++;
+
+		token = strtok_r(line, "\r\n", &saveptr1);
+		if (token == NULL)
+			continue;
+
+		/* Check inside the single line */
+		for (fld = CFG_COMMAND, cmd = CMD_INVALID,
+				line = token; ; line = NULL, fld++) {
+			token = strtok_r(line, " \t", &saveptr2);
+			if (token == NULL)
+				break;
+
+			/* Drop all text starting with '#' as comments */
+			if (token[0] == '#')
+				break;
+
+			parse_cfg_fld(ublhdr, &cmd, token, name,
+					lineno, fld, &dcd_len);
+		}
+	}
+	fclose(fd);
+
+	return dcd_len;
+}
+
+static int ublimage_check_image_types(uint8_t type)
+{
+	if (type == IH_TYPE_UBLIMAGE)
+		return EXIT_SUCCESS;
+	else
+		return EXIT_FAILURE;
+}
+
+static int ublimage_verify_header(unsigned char *ptr, int image_size,
+			struct mkimage_params *params)
+{
+	return 0;
+}
+
+static void ublimage_print_header(const void *ptr)
+{
+	struct ubl_header *ubl_hdr = (struct ubl_header *) ptr;
+
+	print_hdr(ubl_hdr);
+}
+
+static void ublimage_set_header(void *ptr, struct stat *sbuf, int ifd,
+				struct mkimage_params *params)
+{
+	struct ubl_header *ublhdr = (struct ubl_header *)ptr;
+
+	/* Parse configuration file */
+	parse_cfg_file(ublhdr, params->imagename);
+}
+
+int ublimage_check_params(struct mkimage_params *params)
+{
+	if (!params)
+		return CFG_INVALID;
+	if (!strlen(params->imagename)) {
+		fprintf(stderr, "Error: %s - Configuration file not"
+			"specified, it is needed for ublimage generation\n",
+			params->cmdname);
+		return CFG_INVALID;
+	}
+	/*
+	 * Check parameters:
+	 * XIP is not allowed and verify that incompatible
+	 * parameters are not sent at the same time
+	 * For example, if list is required a data image must not be provided
+	 */
+	return	(params->dflag && (params->fflag || params->lflag)) ||
+		(params->fflag && (params->dflag || params->lflag)) ||
+		(params->lflag && (params->dflag || params->fflag)) ||
+		(params->xflag) || !(strlen(params->imagename));
+}
+
+/*
+ * ublimage parameters
+ */
+static struct image_type_params ublimage_params = {
+	.name		= "Davinci UBL boot support",
+	.header_size	= sizeof(struct ubl_header),
+	.hdr		= (void *)&ublimage_header,
+	.check_image_type = ublimage_check_image_types,
+	.verify_header	= ublimage_verify_header,
+	.print_header	= ublimage_print_header,
+	.set_header	= ublimage_set_header,
+	.check_params	= ublimage_check_params,
+};
+
+void init_ubl_image_type(void)
+{
+	mkimage_register(&ublimage_params);
+}

tools/ublimage.h

@@ -0,0 +1,103 @@
+/*
+ * (C) Copyright 2011
+ * Heiko Schocher, DENX Software Engineering, hs@denx.de.
+ *
+ * Vased on:
+ * (C) Copyright 2009
+ * Stefano Babic, DENX Software Engineering, sbabic@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
+ */
+
+#ifndef _UBLIMAGE_H_
+#define _UBLIMAGE_H_
+
+#include <config.h>
+
+#if !defined(CONFIG_SYS_UBL_BLOCK)
+#define CONFIG_SYS_UBL_BLOCK 512
+#endif
+
+enum ublimage_cmd {
+	CMD_INVALID,
+	CMD_BOOT_MODE,
+	CMD_ENTRY,
+	CMD_PAGE,
+	CMD_ST_BLOCK,
+	CMD_ST_PAGE,
+	CMD_LD_ADDR
+};
+
+enum ublimage_fld_types {
+	CFG_INVALID = -1,
+	CFG_COMMAND,
+	CFG_REG_VALUE
+};
+
+/*
+ * from sprufg5a.pdf Table 110
+ * Used by RBL when doing NAND boot
+ */
+#define UBL_MAGIC_BASE              (0xA1ACED00)
+/* Safe boot mode */
+#define UBL_MAGIC_SAFE              (0x00)
+/* DMA boot mode */
+#define UBL_MAGIC_DMA               (0x11)
+/* I Cache boot mode */
+#define UBL_MAGIC_IC                (0x22)
+/* Fast EMIF boot mode */
+#define UBL_MAGIC_FAST              (0x33)
+/* DMA + ICache boot mode */
+#define UBL_MAGIC_DMA_IC            (0x44)
+/* DMA + ICache + Fast EMIF boot mode */
+#define UBL_MAGIC_DMA_IC_FAST       (0x55)
+
+/* Define max UBL image size */
+#define UBL_IMAGE_SIZE              (0x00003800u)
+
+/* from sprufg5a.pdf Table 109 */
+struct ubl_header {
+	uint32_t	magic;	/* Magic Number, see UBL_* defines */
+	uint32_t	entry;	/* entry point address for bootloader */
+	uint32_t	pages;	/* number of pages (size of bootloader) */
+	uint32_t	block;	/*
+				 * blocknumber where user bootloader is
+				 * present
+				 */
+	uint32_t	page;	/*
+				 * page number where user bootloader is
+				 * present.
+				 */
+	uint32_t	pll_m;	/*
+				 * PLL setting -Multiplier (only valid if
+				 * Magic Number indicates PLL enable).
+				 */
+	uint32_t	pll_n;	/*
+				 * PLL setting -Divider (only valid if
+				 * Magic Number indicates PLL enable).
+				 */
+	uint32_t	emif;	/*
+				 * fast EMIF setting (only valid if
+				 * Magic Number indicates fast EMIF boot).
+				 */
+	/* to fit in one nand block */
+	unsigned char	res[CONFIG_SYS_UBL_BLOCK - 8 * 4];
+};
+
+#endif /* _UBLIMAGE_H_ */