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authorDave Kleikamp <shaggy@linux.vnet.ibm.com>2008-07-07 10:28:52 -0400
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2008-07-09 02:30:45 -0400
commitaba46c5027cb59d98052231b36efcbbde9c77a1d (patch)
treeb69dd362c74db562789d14136294c5fcbb7632e7 /include/asm-powerpc/pgtable-ppc64.h
parentb845f313d78e4e259ec449909e3bbadf77b53a6d (diff)
powerpc/mm: Define flags for Strong Access Ordering
This patch defines: - PROT_SAO, which is passed into mmap() and mprotect() in the prot field - VM_SAO in vma->vm_flags, and - _PAGE_SAO, the combination of WIMG bits in the pte that enables strong access ordering for the page. Signed-off-by: Dave Kleikamp <shaggy@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'include/asm-powerpc/pgtable-ppc64.h')
-rw-r--r--include/asm-powerpc/pgtable-ppc64.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/asm-powerpc/pgtable-ppc64.h b/include/asm-powerpc/pgtable-ppc64.h
index b2754d46be44..d09599cccb35 100644
--- a/include/asm-powerpc/pgtable-ppc64.h
+++ b/include/asm-powerpc/pgtable-ppc64.h
@@ -93,6 +93,9 @@
93#define _PAGE_RW 0x0200 /* software: user write access allowed */ 93#define _PAGE_RW 0x0200 /* software: user write access allowed */
94#define _PAGE_BUSY 0x0800 /* software: PTE & hash are busy */ 94#define _PAGE_BUSY 0x0800 /* software: PTE & hash are busy */
95 95
96/* Strong Access Ordering */
97#define _PAGE_SAO (_PAGE_WRITETHRU | _PAGE_NO_CACHE | _PAGE_COHERENT)
98
96#define _PAGE_BASE (_PAGE_PRESENT | _PAGE_ACCESSED | _PAGE_COHERENT) 99#define _PAGE_BASE (_PAGE_PRESENT | _PAGE_ACCESSED | _PAGE_COHERENT)
97 100
98#define _PAGE_WRENABLE (_PAGE_RW | _PAGE_DIRTY) 101#define _PAGE_WRENABLE (_PAGE_RW | _PAGE_DIRTY)