[U-Boot-Users] more on booting uboot from flash on a memec evaluation board

[Peter Ryser <Peter.Ryser@xilinx.com>]

Keep in mind that the ML300 board is "special" because it does not have 
flash on the board and always "boots" from System ACE CF. To make use of 
u-boot on that board an ACE file containing u-boot is loaded by System 
ACE CF into main memory and u-boot is started from there. The IIC EEPROM 
on the board is used as storage space for the environment.

- Peter


grave wrote:

> More information on our design :
>
> We have 32 MB of RAM @ 0x00000000
> A flash system @ 0x0300000
>
> I have copied the ml300 design and change a few things :
> monitor address goes from 0x04000000 to 0x01000000 in ml300.h
> the same in config.mk
>
> I put the uboot.srec file in the flash memory
> and I setup the following code to jump to 0x03000100
>
> file depart.s :
>     .section ".boot","ax"
>     .align 2
>     .globl _boot
>     .type _boot, at function
> _boot:
>     b _uboot
>
> file suite.s :
>     .section ".text"
>     align 2
>     .globl _uboot
>     .type _uboot, at function
> _uboot:
>     lis 0,0x300
>     ori 0,0,256
>     mtlr 0
>     blrl
>
> ld script :
> ENTRY(_boot)
> SECTIONS
> {
>   .text 0xffff8000 :
>   {
>       *(.text)
>   }
>   .boot 0xfffffffc :
>   {
>       *(.boot)
>   }
> }
>
> the small code generated is used to boot the ppc with the xilinx edk.
>
> uboot doesn't seem to boot, what I have done wrong ?
>
> xavier
>
>
>
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