From: "kang shuo" <blackfin.kang@gmail.com>
To: linuxppc-embedded@ozlabs.org
Subject: A question about _PAGE_PRESENT flag when ioremap is executed....
Date: Tue, 10 Jul 2007 10:11:28 +0800 [thread overview]
Message-ID: <a7f827420707091911x5c3b538fp5f0dd8a316d862ad@mail.gmail.com> (raw)
hi:
I had read some confusing code about io address map in
MPC8560 that employs E500 core. My confusion is when io address map is
setup, if _PAGE_PRESENT flag of page is set? In implementation of
mpc8560 , that seems page flag that maps to io address region is
0x280, means only the following flag is set:
#define _PAGE_GUARDED 0x00080 /* H: G bit */
#define _PAGE_NO_CACHE 0x00200 /* H: I bit */
But I think _PAGE_PRESENT shoulbe be set for BOOKE too...
/* Definitions for FSL Book-E Cores */
#define _PAGE_PRESENT 0x00001 /* S: PTE contains a translation */
Any guys give me some idea about that? Thanks....
-- Michael.Kang
reply other threads:[~2007-07-10 2:11 UTC|newest]
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