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How do I enable the L2 cache?
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Either: In UBoot, set the environment variable bootargs to include the phrase:

 

 l2cr=0x80000000

Zero, x, eight, seven zeroes.

Or: In Linux, the kernel L2 driver can be controlled via the interface /proc/sys/kernel/l2cr.

Just read the ascii string from the interface using cat /proc/sys/kernel/l2cr.

If you want to change it, just overwrite the hex value with a new one with:

 

 echo 'hexcode' > /proc/sys/kernel/l2cr. 

 

Enable with hex code 0x80000000, disable with 0x00000000.

OS4 will probably enable this by default.

 



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