devkit8000程序的烧写signGP

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***原文来自：
***http://blog.chinaunix.net/uid-23373524-id-2426918.html
*****************************************************************/

下面开始正式进入烧写程序部分，先看看x-loader-1.4.1
第一件事当然是读下README了，

Directory Hierarchy:    // 下面的目录
====================
 
- board         Board dependent files
- cpu           CPU specific files
- drivers       Commonly used device drivers
- lib           Libraries
 
- cpu/arm926ejs Files specific to ARM 926 CPUs
- cpu/arm1136 Files specific to ARM 1136 CPUs
- cpu/omap3 Files specific to ARM CortexA8 CPU
 
 
- board/omap1710h3
                Files specific to OMAP 1710 H3 boards
- board/omap2420h4
                Files specific to OMAP 2420 H4 boards
- board/omap2430sdp
                Files specific to OMAP 2430 2430sdp boards
- board/omap3430sdp
                Files specific to OMAP 3420sdp boards

Software Configuration:
=======================
 
Configuration is usually done using C preprocessor defines. Configuration
depends on the combination of board and CPU type; all such information is
kept in a configuration file "include/configs/<board_name>.h".
 
Example: For a H3 module, all configuration settings are in
"include/configs/omap1710h3.h".
 
For all supported boards there are ready-to-use default
configurations available; just type "make <board_name>_config".
 
Example: For a H3 module type:
 
        cd x-load
        make omap1710h3_config
 
After a board has been configured, type "make" to build it supposing the
needed cross tools are in your path.

Image Format:
=============
 
X-Loader expects OS boot loader (e.g. U-Boot) in Nand flash using
JFFS2 style ECC.
 
 
Prepare Booting Nand Flash:
===========================
 
After you have built x-load.bin for your board, you need to do the
followings to get it into Nand flash:
 
1. Use Texas Instruments IFT to sign x-load.bin. This results in a
signed image called x-load.bin.ift.
2. Use Texas Instruments FlashPrep to generate a .out file using
FlashWriterNand and specifying 0 as nand target address.
3. Use Texas instrumnets Code Composer Studio to run the .out file
which flashes x-load.bin.ift to Nand flash.
 
Next you need to get your OS boot loader to Nand at the address your
X-Loader expects. For the H3 example, you can use U-Boot to flash U-Boot.
You can't use FlashWriterNand because it uses ROM code ECC style.

从上面可以得知：
（1）我们第一步需要配置板子的参数，板子的参数放在include/configs/<board_name>.h，
#ls ./include/configs/
omap1510.h         omap2430sdp.h      omap3devkit8000.h 
omap1710h3.h       omap3430sdp.h      omap3devkit9000.h 
omap2420h4.h       omap3530beagle.h   sbc8100.h
很显然我使用板子是omap3devkit8000.h,
继续看看，挺长的就不贴出来了，我的目的是跑beagle的资源，不妨看下二者在x-loader的配置

区别，
#diff ./omap3530beagle.h ./omap3devkit8000.h
41c41
< #define CONFIG_OMAP3_BEAGLE      1    /* working with BEAGLE */
---
> #define CONFIG_OMAP3_DevKit8000  1    /* working with DevKit8000 */
46,51d45
< /* Uncomment this for Rev 1 boards*/
< //#define CONFIG_BEAGLE_REV1   1
<
< /* Uncomment this for Rev 2 boards */
< #define CONFIG_BEAGLE_REV2     1
<
66d59
< #ifdef CONFIG_OMAP3_BEAGLE
68,70d60
< #else
< #define V_OSCK                   19200000  /* Clock output from T2 */
< #endif
92,94d81
< #ifdef CONFIG_BEAGLE_REV1
< #define CFG_ONENAND           1
< #else
96d82
< #endif
117,119d102
< #ifdef CONFIG_BEAGLE_REV1
< #define CFG_NS16550_COM1         OMAP34XX_UART1
< #else
121d103
< #endif
127,131d108
< #ifdef CONFIG_BEAGLE_REV1
< #define CONFIG_SERIAL1           1    /* UART1 on BEAGLE */
< #define CONFIG_CONS_INDEX        1
< #else
< #define CONFIG_SERIAL1           3    /* UART3 on BEAGLE */
133d109
< #endif
162c138
< //#define NAND_16BIT
---
> #define NAND_16BIT
172c148
< #define NAND_UBOOT_END           0x0160000 /* Giving a space of 2 blocks = 256KB */
---
> #define NAND_UBOOT_END           0x01E0000 /* Giving a space of 2 blocks = 256KB */

从中可以看出基本没有差别，就是改了下板子的名字而已。
接下来按照devkit8000步骤：
#make distclean
find . -type f \
                \( -name 'core' -o -name '*.bak' -o -name '*~' \
                -o -name '*.o'  -o -name '*.a'  \) -print \
                | xargs rm -f
find . -type f \
                \( -name .depend -o -name '*.srec' -o -name '*.bin' \) \
                -print \
                | xargs rm -f
rm -f  *.bak tags TAGS
rm -fr *.*~
rm -f x-load x-load.map 
rm -f include/asm/proc include/asm/arch
rm -f x-load.bin.ift
rm -f include/config.h include/config.mk
#sudo make omap3devkit8000_config
rm -f include/config.h include/config.mk
Configuring for omap3devkit8000 board...

然后make生成x-load.bin
然后再依据下列步骤：
1. Use Texas Instruments IFT to sign x-load.bin. This results in a
signed image called x-load.bin.ift.
2. Use Texas Instruments FlashPrep to generate a .out file using
FlashWriterNand and specifying 0 as nand target address.
3. Use Texas instrumnets Code Composer Studio to run the .out file
which flashes x-load.bin.ift to Nand flash.
第一个步骤可使用signGP,signGP.c如下：
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <string.h>
#include <malloc.h>
 
 
main(int argc, char *argv[])
{
        int     i;
        char    ifname[FILENAME_MAX], ofname[FILENAME_MAX], ch;
        FILE    *ifile, *ofile;
        unsigned long   loadaddr, len;
        struct stat     sinfo;
 
 
        // Default to x-load.bin and 0x40200800.
        strcpy(ifname, "x-load.bin");
        loadaddr = 0x40200800;
 
        if ((argc == 2) || (argc == 3))
                strcpy(ifname, argv[1]);
 
        if (argc == 3)
                loadaddr = strtol(argv[2], NULL, 16);
 
        // Form the output file name.
        strcpy(ofname, ifname);
        strcat(ofname, ".ift");
 
        // Open the input file.
        ifile = fopen(ifname, "rb");
        if (ifile == NULL) {
                printf("Cannot open %s\n", ifname);
                exit(0);
        }
 
        // Get file length.
        stat(ifname, &sinfo);
        len = sinfo.st_size;
 
        // Open the output file and write it.
        ofile = fopen(ofname, "wb");
        if (ofile == NULL) {
                printf("Cannot open %s\n", ofname);
                fclose(ifile);
                exit(0);
        }
 
        // Pad 1 sector of zeroes.
        //ch = 0x00;
        //for (i=0; i<0x200; i++)
        //      fwrite(&ch, 1, 1, ofile);
 
        fwrite(&len, 1, 4, ofile);
        fwrite(&loadaddr, 1, 4, ofile);
        for (i=0; i<len; i++) {
                fread(&ch, 1, 1, ifile);
                fwrite(&ch, 1, 1, ofile);
        }
 
        fclose(ifile);
        fclose(ofile);
}
                                                       
把这个文件编译下，生成signGP
 gcc -o ./signGP ./signGP.c
然后
./signGP ./x-load.bin
就会由x-load.bin转化生成x-load.bin.ift，
由于我打算用MMC卡试验，所以该需要重新命名x-load.bin.ift
mv ./x-load.bin.ift ./MLO
然后把MLO拷贝到MMC卡，
启动时按住用户键，如下：
Texas Instruments X-Loader 1.41
Starting on with MMC
Reading boot sector

1086232 Bytes Read from MMC
Starting OS Bootloader from MMC...

U-Boot 1.3.3-svn333 (Sep 10 2009 - 16:47:29)

----

证明这个MLO是没问题的。