RE: [microblaze-uclinux] u-boot build question

["A. Bose" <abose@xxxxxxxx>]

Hello,

I got u-boot going, and as you said I wasn't using caches..

Thanks for the response
-Alexis
-----Original Message-----
From: owner-microblaze-uclinux@xxxxxxxxxxxxxx
[mailto:owner-microblaze-uclinux@xxxxxxxxxxxxxx] On Behalf Of John Williams
Sent: Thursday, February 14, 2008 9:33 PM
To: microblaze-uclinux@xxxxxxxxxxxxxx
Subject: Re: [microblaze-uclinux] u-boot build question

Hi A,

A. Bose wrote:

> I am trying to port the Avnet LX50 eval board. I can get a basic kernel 
> to boot by modifying the auto-config.in file for microblaze-auto etc.. , 
> but I having problems building u-boot.

> If there is no support for my board in the u-boot directory does that 
> mean I cannot build u-boot as per the README in the u-boot directory?

No.  petalinux contains a generic microblaze-auto u-boot target, which 
is sufficient for almost every standard board.  The u-boot config system 
is automatically updated according to the system parmaters, in the 
auto-config.in  file.

> microblaze-uclinux-gcc -g  -Os   -D__KERNEL__ -DTEXT_BASE=0x8ffc0000 
>
-I/home/devel/petalinux-v0.30-rc1DEV/software/petalinux-dist/u-boot/include 
> -fno-builtin -ffreestanding -nostdinc -isystem 
>
/home/devel/petalinux-v0.30-rc1DEV/tools/linux-i386/microblaze-uclinux-tools
/bin/../lib/gcc/microblaze-uclinux/3.4.1/include 
> -pipe  -ffixed-r31 -D__microblaze__ -mno-xl-soft-mul -mcpu=v7.00.a   
> -Wall -Wstrict-prototypes -I ../board/petalogix/microblaze-auto/ -c -o 
> cache.o cache.c
> 
> {standard input}: Assembler messages:
> 
> {standard input}:185: Error: unknown opcode "nopnop"

this is a known bug in our u-boot distro - simply edit to add semicolons 
after each "nop" instruction in the code fragment that you quoted.  This 
is fixed internally, and will be updated in the next release.

It is triggered only when a system is built without caches (which is 
pretty rare, since performance is poor).

Regards,

John
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