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Diffstat (limited to 'arch/powerpc/include/asm/nohash/32/pte-40x.h')
-rw-r--r--arch/powerpc/include/asm/nohash/32/pte-40x.h43
1 files changed, 43 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/nohash/32/pte-40x.h b/arch/powerpc/include/asm/nohash/32/pte-40x.h
index bb4b3a4b92a07..661f4599f2fc5 100644
--- a/arch/powerpc/include/asm/nohash/32/pte-40x.h
+++ b/arch/powerpc/include/asm/nohash/32/pte-40x.h
@@ -50,13 +50,56 @@
#define _PAGE_EXEC 0x200 /* hardware: EX permission */
#define _PAGE_ACCESSED 0x400 /* software: R: page referenced */
+/* No page size encoding in the linux PTE */
+#define _PAGE_PSIZE 0
+
+/* cache related flags non existing on 40x */
+#define _PAGE_COHERENT 0
+
+#define _PAGE_KERNEL_RO 0
+#define _PAGE_KERNEL_ROX _PAGE_EXEC
+#define _PAGE_KERNEL_RW (_PAGE_DIRTY | _PAGE_RW | _PAGE_HWWRITE)
+#define _PAGE_KERNEL_RWX (_PAGE_DIRTY | _PAGE_RW | _PAGE_HWWRITE | _PAGE_EXEC)
+
#define _PMD_PRESENT 0x400 /* PMD points to page of PTEs */
+#define _PMD_PRESENT_MASK _PMD_PRESENT
#define _PMD_BAD 0x802
#define _PMD_SIZE_4M 0x0c0
#define _PMD_SIZE_16M 0x0e0
+#define _PMD_USER 0
+
+#define _PTE_NONE_MASK 0
/* Until my rework is finished, 40x still needs atomic PTE updates */
#define PTE_ATOMIC_UPDATES 1
+#define _PAGE_BASE_NC (_PAGE_PRESENT | _PAGE_ACCESSED)
+#define _PAGE_BASE (_PAGE_BASE_NC)
+
+/* Permission masks used to generate the __P and __S table */
+#define PAGE_NONE __pgprot(_PAGE_BASE)
+#define PAGE_SHARED __pgprot(_PAGE_BASE | _PAGE_USER | _PAGE_RW)
+#define PAGE_SHARED_X __pgprot(_PAGE_BASE | _PAGE_USER | _PAGE_RW | _PAGE_EXEC)
+#define PAGE_COPY __pgprot(_PAGE_BASE | _PAGE_USER)
+#define PAGE_COPY_X __pgprot(_PAGE_BASE | _PAGE_USER | _PAGE_EXEC)
+#define PAGE_READONLY __pgprot(_PAGE_BASE | _PAGE_USER)
+#define PAGE_READONLY_X __pgprot(_PAGE_BASE | _PAGE_USER | _PAGE_EXEC)
+
+#ifndef __ASSEMBLY__
+static inline pte_t pte_wrprotect(pte_t pte)
+{
+ return __pte(pte_val(pte) & ~(_PAGE_RW | _PAGE_HWWRITE));
+}
+
+#define pte_wrprotect pte_wrprotect
+
+static inline pte_t pte_mkclean(pte_t pte)
+{
+ return __pte(pte_val(pte) & ~(_PAGE_DIRTY | _PAGE_HWWRITE));
+}
+
+#define pte_mkclean pte_mkclean
+#endif
+
#endif /* __KERNEL__ */
#endif /* _ASM_POWERPC_NOHASH_32_PTE_40x_H */