Hi,

remove "clocks_in_mhz=1" in your environment. This problem is documented in: http://www.denx.de/twiki/bin/view/DULG/LinuxHangsAfterUncompressingKernel

Wolfgang.

-- Original Message -- From: Steve Gray steve.gray@westell.co.uk To: "U-Boot-Users (E-mail)" u-boot-users@lists.sourceforge.net Subject: [U-Boot-Users] u-boot & linux kernel help on mpc860 Date: Wed, 10 Dec 2003 09:37:15 -0000

Hi everyone. This is my first post onto this mailing list, so please forgive me in advance if i am not following the correct protocol with posts and such.

I have u-boot working it seems almost 100%, however i have a problem with starting the linux kernel using bootm.

I am using eldk 2.1.0 patched upto 2.2.0. Linux_2_4_devel cvs (snapshot 09/12/03) Hardware setup Flash Base address 0xa00000000 -> 0xa1000000 ( AMD29LV640 x2 16-bit wide) SDRAM 0x00000000 -> 0x01000000 Serial SMC1 @ 38k4 Net FEC

I can tftp the uImage into RAM, then cp.b into flash. This process is fine. But when running the image bootm command, it seems not to continue.

## Booting image at a0100000 ... Image Name: Linux-2.4.23 Created: 2003-12-09 16:44:24 UTC Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 637255 Bytes = 622.3 kB Load Address: 00000000 Entry Point: 00000000 Verifying Checksum ... OK Uncompressing Kernel Image ... OK

From this point everything stops. There is no more output and the console is not responding to anything I have what i believe to be the correct environment.

baudrate=38400 ethaddr=00:a0:13:00:0a:8c preboot=echo;echo clocks_in_mhz=1 kernel_addr=a0100000 bootargs=root=/dev/nfs rw nfsroot=$(serverip):$(rootpath) ip=$(ipaddr):$(serveri p):$(gatewayip):$(netmask):$(hostname)::off bootcmd=bootm a0100000 filesize=9b949 ipaddr=168.10.10.6 serverip=168.10.1.240 stdin=serial stdout=serial stderr=serial

Environment size: 340/4092 bytes

I have a number of questions about the interaction with u-boot and the kernel, which i am hoping can be answered.

Does the kernel require configuration for custom hardware ? By custom hardware i mean not an off shelf the standard development board. How does the kernel find out the flash base address. serial port is running at 38k4 on smc1, the FEC is to be used. IP address etc etc ?

Thanks in Advance Steve Gray

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Dear Steve,

in message 2E6FE17ED9336449B70E4AC6C5CF50020591E3@TBSMAIL you wrote:

I can tftp the uImage into RAM, then cp.b into flash. This process is fine. But when running the image bootm command, it seems not to continue.

## Booting image at a0100000 ... Image Name: Linux-2.4.23

This is Linux kernel version 2.4.23.

From this point everything stops. There is no more output and the console is not responding to anything I have what i believe to be the correct environment.

baudrate=38400 ethaddr=00:a0:13:00:0a:8c preboot=echo;echo clocks_in_mhz=1

^^^^^^^^^^^^^^^^^^^^^^^

And this is the culprit.

It seems you did not read the FAQ section of the U-Boot manual

Does the kernel require configuration for custom hardware ? By custom

Yes, usually at least for the clock routing and I/O port pins used for the Ethernet interface.

How does the kernel find out the flash base address. serial port is running at 38k4 on smc1, the FEC is to be used. IP address etc etc ?

The flash base address (and size) are passed as part of the bd_info structure; the cfact that you want to use the FEC is part of the Linux kernel configuration; IP address can be passed as part of the boot arguments (bootargs environment variable in U-Boot).

Best regards,

Wolfgang Denk