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Can't place TEXTSEG in SDRAM?

Guru 15580 points

DSP/BIOS v5.41.13.42

C5515EVM

I would like to run my code from SDRAM. However, when I place the .text section in SDRAM using the config script, the linker still places the .text section in SARAM. Can someone spot what is wrong with my config

utils.loadPlatform("ti.platforms.ezdsp5505");

/* The following DSP/BIOS Features are enabled. */
bios.enableRealTimeAnalysis(prog);
/*bios.enableRtdx(prog);*/
bios.enableTskManager(prog);

bios.MEM.instance("VECT").base = 0x000100;
bios.MEM.instance("DARAM").base = 0x000180;
bios.MEM.instance("DARAM").len = 0x7e7f;
bios.MEM.instance("SARAM").base = 0x008000;
bios.MEM.instance("SARAM").len = 0x20000;
bios.MEM.create("SDRAM");
bios.MEM.instance("SDRAM").base = 0x028000;
bios.MEM.instance("SDRAM").len = 0x3d8000;

bios.MEM.NOMEMORYHEAPS = 0;
bios.MEM.instance("SDRAM").createHeap = 1;
bios.MEM.instance("SDRAM").heapSize = 0x12800;
bios.MEM.TEXTSEG = prog.get("SDRAM");
bios.MEM.BIOSOBJSEG = prog.get("SDRAM");
bios.MEM.MALLOCSEG = prog.get("SDRAM");

bios.LOG.create("trace");
bios.PRD.create("ToggleLed");
bios.PRD.instance("ToggleLed").order = 2;
bios.PRD.instance("ToggleLed").fxn = prog.extern("toggleLED");
bios.PRD.instance("ToggleLed").period = 500;
bios.HWI.instance("HWI_INT8").useDispatcher = 1;
bios.HWI.instance("HWI_INT8").fxn = prog.extern("HWI_I2S_DMA_isr");
bios.SEM.create("SEM_EndOfFrame");
bios.TSK.instance("TSK_idle").order = 1;
bios.TSK.create("TSK_ProcessFrame");
bios.TSK.instance("TSK_ProcessFrame").order = 3;
bios.TSK.instance("TSK_ProcessFrame").fxn = prog.extern("ProcessFrame");
bios.PRD.instance("ToggleLed").order = 1;

// !GRAPHICAL_CONFIG_TOOL_SCRIPT_INSERT_POINT!

prog.gen();

...and from my map file

.text        0     00010000  [ 00008000 ] 0003d8b0          *   

  • MikeH,
    if you are working in CCS, check the directory Debug (or Release) for a file with the extension .cmd. Open it in a text editor and check if there is a line that allocates .text in that file. It should look similar to this:
    .text: {} > SDRAM
    If you are not using CCS, the cmd file should be in the same directory as your TCF script.
    The next thing to check is whether you are passing another linker command file on your linker command line. If there is another .cmd file, check if that file allocates .text. Let me know what you find, and then we'll know where to look further. It would also help if you paste here your linker command line.

  • MikeH,

    What version of the compiler are you using?

    I imported the BIOS hello example and then applied your *.tcf file changes to it.  I saw it move .text into SDRAM:

    ******************************************************************************
                  TMS320C55x Linker PC v4.4.1                      
    ******************************************************************************

    ...

            name            origin    length      used     unused   attr    fill
                            (bytes)   (bytes)    (bytes)   (bytes)
    ----------------------  --------  ---------  --------  --------  ----  --------
      VECT                  00000200   00000100  00000100  00000000  RWIX
      DARAM                 00000300   0000fcfe  00005862  0000a49c  RWIX
      SARAM                 00010000   00040000  00000000  00040000  RWIX
      SDRAM                 00050000   007b0000  0002509c  0078af64  RWIX

    ...

    00075000                .text

    See attached. 7608.text_sdram.zip

    Steve

  • My bad. I have been jumping between Debug and Release. If I actually look at the *correct* .map file I can see that the linker is correctly allocating memory segments.

    Thanks for the help guys.