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Altera_Forum
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21 years ago

uClinux .data segment in SDRAM?

For a number of reasons, I'd like to run my kernel in SRAM but allocate data memory (i.e. socket buffers) in SDRAM. This seems possible with a NIOS 'Hello World' application, or the like...
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Altera_Forum
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20 years ago

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2) I get Perror: Bad Address when I try to send an SDRAM buffer over a TCP socket, regardless of the size of the buffer. Googling for this perror I see that it&#39;s caused by an &#39;invalid address&#39;.[/b]

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In (the unlikely) case anyone has this same problem, I was able to remedy this situation by editing &#39;access_ok()&#39; in &#39;include/asm-nios2nommu/uaccess.h&#39; to allow addresses in SDRAM. Out of the box, the function checks that the given address is between nasys_program_mem and nasys_program_mem_end. My SDRAM is not in this range. YMMV.

Ryan

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