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Altera_Forum's avatar
Altera_Forum
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16 years ago

nios2-linux on DE0 (Cyclone III /EP3C16F484)

Hi,

today I wanted to try out running linux on my DE0 board [1] which I thought should be possible.

I followed the tutorial on [2] which uses also a cyclone III.

Compiling the source and so on -- using the default settings -- went quite fine, however when downloading the linux.initramfs.gz to the board I get a download error due to failed verification similar to this user here: [3]

So I tried using compiling the source with custom-fpga.h - however this fails horribly due to several missing defines :/

Can somebody perhaps help me creating a valid SOPC file which is compatible with the nios2-linux for my board?

Which components are absolutely necessary for linux to run on niosII ?

Help is really appreciated as I tried to get it working for the last few days (and creating/modifing many many systems ://)

Thanks!

11 Replies

  • Altera_Forum's avatar
    Altera_Forum
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    16 years ago

    Hi,

    I think that components that are necessary to run uclinux with MMU are:

    1-CPU

    2-OnChip_Memory

    3-Sdram

    4-Timer

    5-Jtag_Uart

    Once you have compiled the project follow the second link you have posted of nioswiki, it's very well explained I think.

    I hope that I have helped you
  • Altera_Forum's avatar
    Altera_Forum
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    16 years ago

    Hey,

    yes thank you very much.

    Now I'm getting these errors 

     /data2/nios2-linux/linux-2.6/arch/nios2/kernel/asm-offsets.c: In function 'main':                                            
/data2/nios2-linux/linux-2.6/arch/nios2/kernel/asm-offsets.c:134: error: 'KERNEL_REGION_BASE' undeclared (first use in this function)
/data2/nios2-linux/linux-2.6/arch/nios2/kernel/asm-offsets.c:134: error: (Each undeclared identifier is reported only once           
/data2/nios2-linux/linux-2.6/arch/nios2/kernel/asm-offsets.c:134: error: for each function it appears in.)                           
/data2/nios2-linux/linux-2.6/arch/nios2/kernel/asm-offsets.c:136: error: 'FAST_TLB_MISS_EXCEPTION_ADDR' undeclared (first use in this function)
    Where do I get the right values for these from ? J

    ust copy them from the default_mmu.h and hope the best?

    Unfortunately they aren't defined in my custom_fpga.h :/
  • Altera_Forum's avatar
    Altera_Forum
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    16 years ago

    Ah - adding the tightly coupled instruction / data masters and recreating the system it worked and the system compiled quite fine - even downloading worked.

    However after downloading and attaching a nios2-terminal nothing is displayed :/ 

    
/cygdrive/c/altera/DE0_NIOS_SDCARD
$ nios2-download -g linux.initramfs.gz
Using cable "USB-Blaster ", device 1, instance 0x00
Pausing target processor: OK
Initializing CPU cache (if present)
OK
Downloaded 2108KB in 36.6s (57.5KB/s)
Verified OK
Starting processor at address 0xC1800000
/cygdrive/c/altera/DE0_NIOS_SDCARD
$ nios2-terminal.exe
nios2-terminal: connected to hardware target using JTAG UART on cable
nios2-terminal: "USB-Blaster ", device 1, instance 0
nios2-terminal: (Use the IDE stop button or Ctrl-C to terminate)

    Any ideas?
  • Altera_Forum's avatar
    Altera_Forum
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    16 years ago

    Hi,

    Any ideas I do the same, well I only write nios2-terminal the command that you wrote my terminal didn't found it.
  • Altera_Forum's avatar
    Altera_Forum
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    15 years ago

    Because you dont have nios2-terminal in your PATH variable.

    Put this: locate nios2-terminal
  • Altera_Forum's avatar
    Altera_Forum
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    15 years ago

    Pete123, vikonilov,

    Check the Virginia Tech CCM Lab wiki page. It provides detailed information on how to install uClinux on NIOS2 in general, and Terasic DE2-70, DE4 and DE0-Nano board in particular.

    Tony
  • Altera_Forum's avatar
    Altera_Forum
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    15 years ago

    No problem with accessing those links. Thanks. Will be useful.