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Altera_Forum's avatar
Altera_Forum
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16 years ago

onchip mem is full on a "Hello world" program

Hello,

I am working on a video design with the Cyclone III C25 starter kit and a hsmc quad video Bitec card.

I have a sopc design with a cpu, onchip mem, a ssram, a flash memory interface, a tristate bridge, a jtag, an i2c bus (BITEC module), a vga and 2 video inputs (those are also BITEC modules).

It was extracted from an example which worked. Until now, I never changed anything in SoPC. Lately, I made a test and generated sopc again without changing anything. Then, I have the following errors in NIOS (I did not change my C code either). I have 32KBytes onchip mem with 32 bit wide data (on a C25 board, I have a total memory of 0.6Mbits thus my total onchip mem is 600/8 = 75 MBytes) ?

I made another test and implemented an easy "Hello world" which does not work either. The section .text corresponds to my program, which may be too big ? Thus, it should work at least on a "hello world" program ?

Myriam

Here is what is written in NIOS II :

make -s all includes

Compiling main4.c...

Linking hsmc_quad_video_mosaic.elf...

/cygdrive/c/altera/90/nios2eds/bin/nios2-gnutools/H-i686-pc-cygwin/bin/../lib/gcc/nios2-elf/3.4.6/../../../../nios2-elf/bin/ld: region onchip_mem is full (hsmc_quad_video_mosaic.elf section .text). Region needs to be 20832 bytes larger.

/cygdrive/c/altera/90/nios2eds/bin/nios2-gnutools/H-i686-pc-cygwin/bin/../lib/gcc/nios2-elf/3.4.6/../../../../nios2-elf/bin/ld: address 0x1fd54 of hsmc_quad_video_mosaic.elf section .onchip_mem is not within region onchip_mem

collect2: ld returned 1 exit status

make: *** [hsmc_quad_video_mosaic.elf] Error 1

Build completed in 6.828 seconds

3 Replies

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    16 years ago

    Not sure what your question is. Onchip memory is very limited. Most nios designs do not run their code out of onchip memory. You can only do this for a very small design. I recommend that you run your code out of the ssram instead. Do you know how to do this?

    Jake
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    16 years ago

    In the System Library Properties, in the right column, I only have the program memory on the onchip mem because I have no choice. The other things (read only data memory...stack memory) are on the ssram. Is that what you were saying ? Otherwise, I don't know how to do this.

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    16 years ago

    Hi Jake,

    I added a ddr-sdram, put 40kbytes of onchip mem and put the reset and irq vectors of the cpu on the ddr instead of the onchip mem. I still missed 5000 bytes. I tried 45000kbytes of onchip mem but it is too much and Quartus II did not compile.

    I chose to run the code on the DDR SDRAM for the program memory and let the rest of the right column to ssram memory. I also tried to put everything on ddr sdram memory. But then, I have :

    Build :

    Hardware simulation is not enabled for the target SOPC Builder system.

    Skipping creation of hardware simulation model contents and simulation symbol files

    Run as :

    Downloading 02000000 ( 0%)

    Downloaded 48KB in 0.8s (60.0KB/s)

    Verifying 02000000 ( 0%)

    Verify failed between address 0x2000000 and 0x200BFEB

    Leaving target processor paused

    What should I do ?

    Thanks in advance,

    Myriam