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Altera_Forum's avatar
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...
Altera_Forum's avatar
Altera_Forum
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20 years ago

<div class='quotetop'>QUOTE </div>

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go to arch/nios2nommu/kernel/setup.c, after the call of init_bootmem_node , put a free_bootmem for your SDRAM. This will label your SDRAM as free memory[/b]

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I did this (after the first free_bootmem call) as below: 

free_bootmem(0x0,0x08000000);

...and got the same result as before (page allocation error on kmalloc(2048,GFP_DMA)). Did I miss something?

Ryan