Hi,
I am trying to bring up an uImage made from a Timesys 4.0 kernel on a EP860 board with u-boot 4.0 as the bootloader. I did a small port to make u-boot run on the EP860, mainly making changes to the SDRAM initialization and Flash configuration code. Once this is done. I went back to the Timesys kernel, which uses the RPXClassic configuration - the kernel runs fine in this configuration on the EP860.
I copied the bd_info structure from u-boot.h to rpxclassic.h in the kernel and I had to add a bi_nvram_size field to the structure since the board requires it.
I know the IMAP_ADDR is important so I'm absolutely sure this matches CFG_IMMR.
When I try autobooting the kernel image from the tftp server, it hangs soon after the kernel is uncompressed.
U-Boot 0.4.0 (Sep 11 2003 - 12:37:07)
CPU: XPC860xxZPnnD4 at 50 MHz: 16 kB I-Cache 8 kB D-Cache FEC present Board: EP860 I2C: ready DRAM: 16 MB FLASH: 16 MB In: serial Out: serial Err: serial Net: FEC ETHERNET Hit any key to stop autoboot: 0 TFTP from server 199.71.138.8; our IP address is 199.71.138.25 Filename 'uImage'. Load address: 0x100000 Loading: ################################################################# ################################################################# ########################################### done Bytes transferred = 883654 (d7bc6 hex) ## Booting image at 00100000 ... Image Name: Linux Kernel Image Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 883590 Bytes = 862.9 kB Load Address: 00100000 Entry Point: 00100000 Verifying Checksum ... OK Uncompressing Kernel Image ... OK B
I had to move the load address up from 0x0 to pass the uncompressing stage. I'm not sure why loading to 0x0 causes problems since the examples in the readme all use 0x0 as the load address.
I made the uImage from vmlinux in the top level directory and the vmlinux.gz from arch/ppc but they hanged at the same point.
I can boot the zImage (kernel built with its own boot loader) by tftping the zImage to RAM and jumping to the start of the image. So the kernel works smoothly with its boot loader.
I would really appreciate any suggestions you can give me to try on the board. I can give you any other information if there's anything I missed here.
Thanks in advance,
David Ho Nanometrics Inc.