Hi All,
I am using ARM926EJS based cutom board. Linux 2.6.14 Uboot -1.1.4 Flash -Spansion 64MB NOR Flash (CFI complient)
I want ot run a SCRIPT or execute a C FUNCTION soon as u boot starts and checks kernel images header and checksum.
if kernel image is bad uboot will call my function or execute a script that will jump to a specific ( predefined Flash Memory ( which was already erased )location and write a byte with my set values.
I tried both the ways but i do have following difficulties on each approch.
1,SCRIPT If i want to do some mathamatical operation in the script how do i achieve ?
For example i want to increment a varible everytime my script is run.
I couldn't do the "+' operation in the script.
I want to achieve something like following. ================================================================= echo "this is my script"
if (primary_image) { mw.b 0x100000 0xFE bootcount cp.b 0x10000 0x33f00000 bootcount
}
else { mw.b 0x100000 0xFD bootcount cp.b 0x10000 0x33f00000 bootcount }
bootcount ++;
========================= Here Primary_image will be set by my cmd_bootm.c and i want to pass it to the script.
Is the above thing doable with uboot scripting ?
Is there any way to do Mathamatical / arithmatic and logical operations in U boot script?
2,My function Which supports uboot monitor command "mw" ( Memeory write)
after compiling i coudn't execute my function on the target it says bad image type.
ofcourse i loaded / burned this image at specific loacation i.e 0x30f00000 and i did
autoscr 0x30f00000
Bad image type
Here is the command i used to create image.I tried all the valid -T ( type option ) of the mkimage utility.
Could you please throw some pointers on any of this ?
./mkimage -A ARM -O linux -T firmware -C none -a 0x1000000 -e 0x100000 -n 'MyScript' -d MyScript.o MyScript.img Image Name: MyScript Created: Wed Oct 31 19:32:48 2007 Image Type: ARM Linux Firmware (uncompressed) Data Size: 7051 Bytes = 6.89 kB = 0.01 MB Load Address: 0x01000000 Entry Point: 0x00100000 [root@volleyball u-boot-CFI]# cp MyScript.img /tftpboot/cmd.img
3,Is there any way to access the bootload count on ARM architecture ,i defined #define CONFIG_BOOTCOUNT_LIMIT in my board config file but the compilation failed at undefined reference to bootload() / or similar function call.