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Message-ID: <754003.20445.qm@web35709.mail.mud.yahoo.com> Date: Fri, 19 Oct 2007 17:27:37 -0700 (PDT) From: Jim Brooks <jbrooks3d@...oo.com> To: linux-kernel@...r.kernel.org Subject: Re: how to use TLB to prevent Linux accessing a particular memory region > 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 __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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