How can I modify the default memory map in sysbios project

Vincent Fang

Other Parts Discussed in Thread: SYSBIOS

Hello

I use CCSV5.3 and sysbios version is 6_34_02_18. I create a C674x sysbios project. After building, I find the memory config in generated linker.cmd as below.

MEMORY
{
    IRAM (RWX) : org = 0x10800000, len = 0x40000
    OCMC (RWX) : org = 0x40300000, len = 0x20000
    DDR3_HOST : org = 0x80000000, len = 0xb000000
    DDR3_DSP : org = 0x8b000000, len = 0x2000000
    DDR3_SR1 : org = 0x8d000000, len = 0xc00000
    DDR3_HDVPSS : org = 0x8dc00000, len = 0x200000
    DDR3_V4L2 : org = 0x8de00000, len = 0x200000
    DDR3_SR0 : org = 0x8e000000, len = 0x1000000
    DDR3_M3 : org = 0x8f000000, len = 0x1000000
}

SECTIONS
{
    .text: load >> DDR3_DSP
    .stack: load > DDR3_DSP
    .bss: load > DDR3_DSP
    .cinit: load > DDR3_DSP
    .pinit: load > DDR3_DSP
    .const: load >> DDR3_DSP
    .data: load >> DDR3_DSP
    .switch: load >> DDR3_DSP
    .sysmem: load > DDR3_DSP
    .far: load >> DDR3_DSP
    .args: load > DDR3_DSP align = 0x4, fill = 0 {_argsize = 0x0; }
    .cio: load >> DDR3_DSP
    .vecs: load >> DDR3_DSP
    xdc.meta: load >> DDR3_DSP, type = COPY

}

My question is which is the original confinure files for generating linker.cmd? I want to modify the original files.

Another question is can I modify memory config via BIOS menu? In system->program->sections, I can see these memory sections but I can't modify it.

Thanks!

Vincent

over 12 years ago

0 Sasha Slijepcevic over 12 years ago

TI__Mastermind 37985 points

Vincent,
the default allocation of sections to memory segments is a result of various targets and platform parameters, but the recommended way for users to control it is through Program.sectMap. Follow the link to find an example how to use it in a config script. You can also use System->Program->sections tab to allocate sections to segments. Is that what you were trying to do but you couldn't or you were trying to change the properties of memory segments?

If you want to change properties of memory segments, size, name, etc. you have to change the platform package you are using. The easiest way to do that is by using the Platform Wizard.

Here is one more link with mode detailed description of memory management in SYSBIOS: http://rtsc.eclipse.org/docs-tip/Memory_Management#RTSC_Platforms_in_Application_Build

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How can I modify the default memory map in sysbios project