Compiler/AM3358: Zimage question

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Hi Prabhakar,

Thanks for the reply,

I run the printenv :

board_rev=00C0
board_serial=0816BBBK0FC2
boot_fdt=try
bootargs=console=ttyO0,115200n8 root=ubi0:rootfs rw ubi.mtd=NAND.file-system,2048 rootfstype=ubifs rootwait=1
bootcmd=run findfdt; run envboot; run mmcboot;setenv mmcdev 1; setenv bootpart 1:2; run mmcboot;run nandboot;
bootcount=1
bootdelay=1
bootdir=/boot
bootenvfile=uEnv.txt
bootfile=zImage
bootm_size=0x10000000
bootpart=1:2
bootscript=echo Running bootscript from mmc${mmcdev} ...; source ${loadaddr}
console=ttyO0,115200n8
cpu=armv7
dfu_alt_info_emmc=rawemmc raw 0 3751936
dfu_alt_info_mmc=boot part 0 1;rootfs part 0 2;MLO fat 0 1;MLO.raw raw 0x100 0x100;u-boot.img.raw raw 0x300 0x400;1
dfu_alt_info_nand=SPL part 0 1;SPL.backup1 part 0 2;SPL.backup2 part 0 3;SPL.backup3 part 0 4;u-boot part 0 5;u-bo9
dfu_alt_info_ram=kernel ram 0x80200000 0xD80000;fdt ram 0x80F80000 0x80000;ramdisk ram 0x81000000 0x4000000
envboot=mmc dev ${mmcdev}; if mmc rescan; then echo SD/MMC found on device ${mmcdev};if run loadbootscript; then r;
eth1addr=68:9e:19:8f:5e:c9
ethact=cpsw
ethaddr=68:9e:19:8f:5e:c7
fdt_addr_r=0x88000000
fdtaddr=0x88000000
fdtfile=am335x-boneblack.dtb
findfdt=if test $board_name = A335BONE; then setenv fdtfile am335x-bone.dtb; fi; if test $board_name = A335BNLT; t
finduuid=part uuid mmc 0:2 uuid
importbootenv=echo Importing environment from mmc${mmcdev} ...; env import -t ${loadaddr} ${filesize}
kernel_addr_r=0x82000000
loadaddr=0x82000000
loadbootenv=fatload mmc ${mmcdev} ${loadaddr} ${bootenvfile}
loadbootscript=load mmc ${mmcdev} ${loadaddr} boot.scr
loadfdt=load mmc ${bootpart} ${fdtaddr} ${bootdir}/${fdtfile}
loadimage=load mmc ${bootpart} ${loadaddr} ${bootdir}/${bootfile}
loadramdisk=load mmc ${mmcdev} ${rdaddr} ramdisk.gz

here boot image is zImage from /boot directory of rootfs and uEnv.txt file is not there, how can i change the boot args then?

Hello,

From the boot args its looking for boot.scr. can you print the this file or attach.
What is the output wile booting linux. Do get any of this messages
Running bootscript from/mporting environment from mm ?

Cheers,
Prabhakar Lad

Hi Prabhakar,
Following is the message-
bootscript = echo Running bootscript from mmc${mmcdev} ...;source ${loadaddr}

Since now i am able to boot using mycompiled zImage which i put inside Rootfs boot directory with am335x_boneblack.dtb.
But since uEnv.txt is not present in mine /boot dir of rootfs .

I explore and have created a boot.cmd file and compiled using cmd mkimage utility comes with uboot src:
mkimage -A arm -O linux -T script -C none -a 0 -e 0 -n 'Execute uImage' -d boot.cmd boot.scr

now i can copy this boot.scr in the /boot folder where my zImage is already present.Is tht correct?
Default image og beaglebone reading uEnv.txt to get the boot args while booting the kernel.

I took a boot.cmd file :
if fatload mmc 0 80200000 uImage
then
\techo ***** Kernel: /dev/mmcblk0p1/uImage *****
else
echo ***** Kernel: /dev/mtd3 *****
nand read 80200000 280000 400000
fi

echo ***** RootFS: /dev/mmcblk0p2 *****
setenv bootargs 'console=ttyS2,115200n8 console=tty0 ethaddr=01:2b:03:01:23:45 g_ether.host_addr=00:dc:c8:f7:75:05 g_ether.dev_addr=00:dd:dc:eb:6d:f1 root=/dev/mmcblk0p2 rw rootwait'

bootm 80200000
refer :elinux.org/ECE497_Modifying_Kernel_Command_Line_Parameters
I want to know what should be the cmd we need to give in boot.cmd file which will load uImage from boot partion instead of rootfs and without uEnv.txt how this wotks.

Regards
Rohit

Hello,

Yes whatever you did was correct.

I assume you have enabled fat in uboot. Can you post your boot.cmd file. that will make easier for guiding you.

Ideally if the boot partition is partition 0, then you need to add "fatload mmc 0 0xxxxxxxxx uImage" and do a bootm 0xxxxxxxxx
where 0xxxxxxxxx is the address in RAM.

Cheers,
--Prabhakar Lad