Messages in this thread | | | Date | Fri, 19 Oct 2007 17:27:37 -0700 (PDT) | From | Jim Brooks <> | Subject | Re: how to use TLB to prevent Linux accessing a particular memory region |
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> Out of 32MB of DDR 8MB is reserved for use by DSP > processor. But the MIPS processor downloads firmware > into this reserved memory for the DSP. > > Now, is it possible to use the TLB to prevent Linux > from accessing the reserved memory after the firmware > has been downloaded?
Well, even if you did remap PTEs (TLBs are N/A), or claimed that special memory, that may be too late. The kernel might've already allocated and stomped over it.
A reliable way is to redefine the kernel's "memory map" which takes effect during boot. Look for the memory map as a .h in arch/ (IIRC).
-- Jim Brooks
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