Newbie, once again
Hi all,
i'm still trying to run u-boot on the Xilinx4 FX12 MiniModul from Avnet. I think i'm on the wrong way....
the powerpc in the xilinx4 has 32MB DRAM (mapped at 0x0000_0000 to 0x03ff_ffff) and 4MB Flash (mapped at 0x0600_0000 to 0x063f_ffff). the integrated 16k block-ram is at 0xffff_c000 to 0xffff_ffff).
the last few days i tried to load the u-boot.srec image from flash into ram with the EDK srec-bootloader, and then run u-boot from ram. but this is not the right way, or ? The only output on the uartlite is :
-------- snipp -------------
U-Boot 1.3.0-rc3 (Nov 15 2007 - 11:58:50)
### No HW ID - assuming ML300
DRAM: 32 MB
------- snapp ------------
What is the better configuration ?
Locate the flash on 0x0000_0000 and the dram to some other location in den adress-space ? or work on with the old configuration ?
i know, i bother sometimes, this work is for my bachelor degree and i want to complete it until january
regards
georg
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Quoted 10 lines · schardt
i'm still trying to run u-boot on the Xilinx4 FX12 MiniModul from Avnet. I think i'm on the wrong way....
the powerpc in the xilinx4 has 32MB DRAM (mapped at 0x0000_0000 to 0x03ff_ffff) and 4MB Flash (mapped at 0x0600_0000 to 0x063f_ffff). the integrated 16k block-ram is at 0xffff_c000 to 0xffff_ffff).
the last few days i tried to load the u-boot.srec image from flash into ram with the EDK srec-bootloader, and then run u-boot from ram. but this is not the right way, or ? The only output on the uartlite is :
http://www.denx.de/wiki/view/DULG/CanUBootBeConfiguredSuchThatItCanBeStartedInRAM
Regards,
Clemens Koller
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http://www.anagramm-technology.com
Quoted 5 lines · schardt
Hi all,
i'm still trying to run u-boot on the Xilinx4 FX12 MiniModul from Avnet. I think i'm on the wrong way....
Quoted 7 lines
the powerpc in the xilinx4 has 32MB DRAM (mapped at 0x0000_0000 to 0x03ff_ffff) and 4MB Flash (mapped at 0x0600_0000 to 0x063f_ffff). the integrated 16k block-ram is at 0xffff_c000 to 0xffff_ffff).
the last few days i tried to load the u-boot.srec image from flash into ram with the EDK srec-bootloader, and then run u-boot from ram. but this is not the right way, or ? The only output on the uartlite is :
If you were booting from the SystemACE and didn't have any memory mapped SRAM, then using srec-bootloader, or some other first stage bootloader to copy a u-boot image from a CF card to main DRAM.
However, in your case you do have memory mapped flash. Use the u-boot.bin image instead and burn it into flash. Your first stage bootloader (the one that runs out of block ram) only need to do one thing; jump to the start address of u-boot in flash.
When u-boot starts executing, it will copy itself from FLASH to DRAM and continue executing from there.
Quoted 11 lines
-------- snipp -------------
U-Boot 1.3.0-rc3 (Nov 15 2007 - 11:58:50)### No HW ID - assuming ML300
DRAM: 32 MB
------- snapp ------------What is the better configuration ?
Locate the flash on 0x0000_0000 and the dram to some other location in den adress-space ? or work on with the old configuration ?
No! Don't do this! :-)
PowerPC Linux expects DRAM to be based at 0. Flash can be mapped anywhere as long as you have code at your boot vector that jumps into it.
Cheers,
g.
Signature · 4 lines
Grant Likely, B.Sc., P.Eng. Secret Lab Technologies Ltd. grant.likely at secretlab.ca (403) 399-0195