[U-Boot-Users] Linux port for MPC855T

Steve Gray
2003-12-10T11:30:55Z

Hi david

from what i have seen so far.
the u-boot applies the upm tables, in the same way maybe your rominit.s did
before ??
the word BSP i think may be confusing in linux terminology. BSP i think is a
windriver term that has been
distorted somewhat. IMHO BSP should stick with vxWorks and bootloader should
be used in the linux field.

The idea of the bootloader "BSP" is to bring sufficent hardware drivers up
to start the RTOS.
So for example the bootloader may need FLASH,SDRAM. To start development you
will need a little more
than that, u may need serial and ethernet, ( you will for u-boot
development)
I guess any other device drivers can be started by the kernel insmod.o, say
if you have other specialist
devices like a quadfalc in our case. Although i am not that far yet

Im sure someone out there will comment if i am incorrect or misinformed.

I have Redhat 9.0
u-boot 1.0.0
eldk 2.1.0 patched to 2.2.0
linux_2_4_devel CVS from denx.de
Have a Vision ICE probe II for programming the inital u-boot.

once u-boot is programmed and working u can use u-boot to tftp a linux
kernel image into RAM
then burn it into flash, the boot from that.
Once you have the kernel in flash u can set u-boot to auto run it.
Much the same way as the windriver BSP menu works.

-----Original Message-----
From: David Aldrich [mailto:david.aldrich at t-modus.nec.co.uk]
Sent: 10 December 2003 11:23
To: 'Steve Gray'
Cc: 'u-boot-users at lists.sourceforge.net'
Subject: RE: [U-Boot-Users] Linux port for MPC855T

Hi Steve

Thanks very much for your reply.

I do not fully understand the roles of the boot loader and the BSP. In
the normal case, would the UPM be programmed by u-boot, or must the
kernel also be aware of it?

Specifically, when we talk about Linux BSP, are we talking about the
boot loader or the device drivers or both?

Where would I find the UPM table values in the VxWorks BSP?

Sorry, if these are ignorant questions. I am more of an application
programmer than a BSP programmer.

Finally, which Linux disctribution and hardware bring-up tools are you
using?

Thanks

David

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