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Altera_Forum's avatar
Altera_Forum
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17 years ago

Linux with MMU on NEEK

Hi, all. I'm testing Linux MMU version, on my NEEK. http://www.nioswiki.com/linux It works fine and I can use "bash" shell. This is the evident proof that we are using the true 'fo...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
17 years ago

Hi,

Thank you, Hippo. By selecting 'Blackfin build options --> Cull unused ELF shared libraries --> no', I was able to add the libraries 'libnss***.so' to /lib. Now 'inetd' and 'ftpd' are working well. But it seems that 'getenv()' that is used in 'ts_calibrate', will not work well yet.

I haven't found the cause out and understood whether this is generated by libraries or not.

I have another question. In 'nios2-linux/linux-2.6/arch/nios2/mm/dma-noncoherent.c', the function 'dma_alloc_coherent()' uses a macro 'UNCAC_ADDR()'. This macro transfers the input address like 

# define UNCAC_ADDR(addr)    ((addr) - PAGE_OFFSET + UNCAC_BASE)
but, UNCAC_BASE is set 

# define UNCAC_BASE        0xa0000000
in 'spaces.h'. Why? This memory space has a special meaning?