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Diffstat (limited to 'arch/powerpc/include/asm/pgtable.h')
-rw-r--r--arch/powerpc/include/asm/pgtable.h29
1 files changed, 29 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/pgtable.h b/arch/powerpc/include/asm/pgtable.h
index 14c79a7dc855..9679b7519a35 100644
--- a/arch/powerpc/include/asm/pgtable.h
+++ b/arch/powerpc/include/asm/pgtable.h
@@ -20,6 +20,25 @@ struct mm_struct;
#include <asm/nohash/pgtable.h>
#endif /* !CONFIG_PPC_BOOK3S */
+/* Note due to the way vm flags are laid out, the bits are XWR */
+#define __P000 PAGE_NONE
+#define __P001 PAGE_READONLY
+#define __P010 PAGE_COPY
+#define __P011 PAGE_COPY
+#define __P100 PAGE_READONLY_X
+#define __P101 PAGE_READONLY_X
+#define __P110 PAGE_COPY_X
+#define __P111 PAGE_COPY_X
+
+#define __S000 PAGE_NONE
+#define __S001 PAGE_READONLY
+#define __S010 PAGE_SHARED
+#define __S011 PAGE_SHARED
+#define __S100 PAGE_READONLY_X
+#define __S101 PAGE_READONLY_X
+#define __S110 PAGE_SHARED_X
+#define __S111 PAGE_SHARED_X
+
#ifndef __ASSEMBLY__
#include <asm/tlbflush.h>
@@ -27,6 +46,16 @@ struct mm_struct;
/* Keep these as a macros to avoid include dependency mess */
#define pte_page(x) pfn_to_page(pte_pfn(x))
#define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot))
+/*
+ * Select all bits except the pfn
+ */
+static inline pgprot_t pte_pgprot(pte_t pte)
+{
+ unsigned long pte_flags;
+
+ pte_flags = pte_val(pte) & ~PTE_RPN_MASK;
+ return __pgprot(pte_flags);
+}
/*
* ZERO_PAGE is a global shared page that is always zero: used