AM68: linker copy table question

Matthew Brown

Part Number: AM68

Tool/software:

Hi,

I have some code I want to load in the external SDRAM and copy to DSP L2 at boot and run from there. I'm struggling to follow the documentation to get this working.
So far I have:

SECTIONS
{
...
.l2_code: load > __CORE_DDR_SPACE, run > __CORE_L2_SPACE
}

and .l2_code is done with a PRAGMA;
#define CODE_SECTION_INT PRAGMA(SET_CODE_SECTION(".l2_code"))
which I place before the various functions I want in .l2_code.

So in the map I get:

.l2_code   0    0000a6528240    00003400     RUN ADDR = 000064810000
                  0000a6528240    00000f80     input.obj (.l2_code)
                  0000a65291c0    00000d80     process.obj (.l2_code)
                  0000a6529f40    00000940     effect.obj (.l2_code)

...

which looks good, but now I can't figure out how or where to make a copy table which will move the .l2_code section from __CORE_DDR_SPACE to __CORE_L2_SPACE at boot.

Can you show me what needs to happen to move the code at boot?

Thanks,
Matt

3 months ago

0 Sivadeep P R 3 months ago

TI__Expert 8330 points

Hi Matt,

Could you please confirm which compiler version you're using?
Also, can you check C7000 Optimizing C/C++ Compiler v5.0.0.LTS section 12.8.1 Using Copy Tables for Boot Loading

Regards,
Sivadeep

0 Matthew Brown 3 months ago in reply to Sivadeep P R

Prodigy 70 points

Hi, I've got 4.1.0.LTS compiler.

Thanks

0 Sivadeep P R 3 months ago in reply to Matthew Brown

TI__Expert 8330 points

Hi Matt,

From : C7000 C/C++ Optimizing Compiler v5.0.0.LTS Users Guide

You can either use built in Link operators in copy tables.

Matthew Brown said:
Can you show me what needs to happen to move the code at boot?

Could you please check this and confirm whether your issue has been resolved?

Regards,
Sivadeep

0 Matthew Brown 3 months ago

Prodigy 70 points

Hi,
I will be able to try that as a test, but I want to make a section .l2_code that links functions from many objects. How do I write this so it copies the custom section .l2_code, not .text from a single object?

Thanks,
Matt

0 Sivadeep P R 3 months ago in reply to Matthew Brown

TI__Expert 8330 points

Hi,

Matthew Brown said:
I will be able to try that as a test, but I want to make a section .l2_code that links functions from many objects

Please check this section

Matthew Brown said:
How do I write this so it copies the custom section .l2_code, not .text from a single object?

Could you please check this?

SECTIONS
{
    .l2_code : {
        *.obj(.l2_code)
    } load > DDR_MEM, run > L2_MEM, table(BINIT)
    
    .binit:                         > DDR_C7x_0
}

Regards,
Sivadeep

0 Matthew Brown 3 months ago in reply to Sivadeep P R

Prodigy 70 points

I will and let you know.

Thanks,
Matt

0 Sivadeep P R 3 months ago in reply to Matthew Brown

TI__Expert 8330 points

Thanks Matt. Keeping this thread in waiting state.

Regards,
Sivadeep

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AM68: linker copy table question