Hello, I am working on ARMVersatile 926EJS application board. I am using NOR Flash with boot monitor. I am trying to boot kernel from the flash, as it is an XIP kernel. I have 3 doubts as explained below.
Switch Settings: S1-1 to S1-8 Off S4-1 On and S4-2 to S4-4 Off
After kernel configuration, .config file contains the following two CONFIG_ entries: CONFIG_XIP_KERNEL=y CONFIG_XIP_PHYS_ADDR=0x34060000
Doubt #1 -------- "The DENX U-Boot and Linux Guide (DULG) for TQM8xxL" document suggests to use CONFIG_XIP_VIRT_ADDR. But I didn't use CONFIG_XIP_VIRT_ADDR. Because I was asked to work with above two CONFIG_ entries only. CONFIG_XIP_VIRT_ADDR is really necessary?
The areas and images available are as shown below on NOR flash:
Flash> list areas
Base Area Size Blocks Block Size ---- --------- ------ ---------- 0x34000000 64M 512 128K
Flash> list images Flash Area Base 0x34000000
Address Name ------- ---- 0x34000000 boot_monitor.axf 0x34040000 u-boot 0x34060000 linux 0x341E0000 selftest.axf 0x34260000 cramfs 0x349E0000 symbian 0x356E0000 mmc2flash.axf Flash>
Used mkimage utility and created kernel image as XiPImage.pcd. Details about XiPImage.pcd are as shown below. I also copied it to /tftpboot/ directory. I want to put XiPImage.pcd in the address range 0x34060000 and 0x341DFFFF.
bash-3.00$ ../../../../../build/bin/mkimage -A arm -O Linux -T kernel -C none -a 0x34060000 -e 0x34060040 -n xipImage-2.6.10-pcd -d xipImage XiPImage.pcd Image Name: xipImage-2.6.10-pcd Created: Mon Sep 19 13:11:40 2005 Image Type: ARM Linux Kernel Image (uncompressed) Data Size: 2175788 Bytes = 2124.79 kB = 2.07 MB Load Address: 0x34060000 Entry Point: 0x34060040 bash-3.00$ bash-3.00$ ../../../../../build/bin/mkimage -l XiPImage.pcd Image Name: xipImage-2.6.10-pcd Created: Sun Sep 18 19:20:09 2005 Image Type: ARM Linux Kernel Image (uncompressed) Data Size: 2175788 Bytes = 2124.79 kB = 2.07 MB Load Address: 0x34060000 Entry Point: 0x34060040 bash-3.00$ cp XiPImage.pcd /tftpboot/ bash-3.00$
I erased linux range from 0x34060000 to 0x341DFFFF.
Flash> erase range 0x34060000 0x341DFFFF Flash> run u-boot Versatile # setenv serverip 10.200.136.7 Versatile # setenv ipaddr 10.200.136.28 Versatile # setenv bootfile XiPImage.pcd Versatile # tftpboot Using MAC Address 00:02:F7:00:10:77 TFTP from server 10.200.136.7; our IP address is 10.200.136.28 Filename 'XiPImage.pcd'. Load address: 0x7fc0 Loading: #################################################################
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################################################################# ################################### done Bytes transferred = 2175852 (21336c hex) Versatile # Versatile # iminfo
## Checking Image at 00007fc0 ... Image Name: xipImage-2.6.10-pcd Image Type: ARM Linux Kernel Image (uncompressed) Data Size: 2175788 Bytes = 2.1 MB Load Address: 34060000 Entry Point: 34060040 Verifying Checksum ... OK Versatile #
I checked whether any image is already there at flash address 0x34060000 even after erasing.
Versatile # iminfo 0x34060000
## Checking Image at 34060000 ... Bad Magic Number Versatile #
Doubt #2 -------- I got "Bad Magic Number". Means, nothing useful information is there. Am I right?
I copied XIP kernel from SDRAM to flash address 0x34060000
Versatile # cp.b 0x7fc0 0x34060000 0x21336c Versatile # iminfo 0x34060000 ## Checking Image at 34060000 ... Bad Magic Number Versatile #
Kernel uses NFS mounted root file system.
Versatile # setenv bootargs root=/dev/nfs rw nfsroot=10.200.136.7:/wrlinux/testscheduler/stage/boards/arm-versatile2/ rootfs console=ttyAMA0 mem=128M ip=10.200.136.28:10.200.136.7::255.255.255.0:arm-versatile:eth0:off Versatile # bootm 0x34060000 ## Booting image at 34060000 ... Bad Magic Number Versatile #
Doubt #3 -------- Kernel is not booting. Because of "Bad Magic Number". Suggestion please, what could be wrong?
Thank you, Ravi