How to make a memory region to be cache disabled ? Cpu is mpc82XX or mpc83XX.

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You can disable the cache with the help of TLBs. See where it is creating
TLBs for the memory regions for that processor.

On Wed, Mar 14, 2012 at 8:07 AM, hellohello [off-list ref] wrote:

How to make a memory region  to be cache disabled in linux?
I'm porting mpc83XX from vxworks to linux. Now meet a question: Cpu use a
memory region (GPCM mode of bus)  to access peripherals, we need this
memory to be cache disabled.
Linux Kernel is 2.6.25.
Thanks very much for any hint!

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hellohello wrote:

How to make a memory region  to be cache disabled in linux?
I'm porting mpc83XX from vxworks to linux. Now meet a question: Cpu use a memory region (GPCM mode of bus)  to access peripherals, we need this memory to be cache disabled.
Linux Kernel is 2.6.25.
Thanks very much for any hint! 

ioremap() is fine enough since it always set I|G as TLB entry attribute.

Tiejun