sh: Acquire some more page flags for SH-5.

[safe/jmp/linux-2.6] / arch / sh / include / asm / pgtable_64.h

diff --git a/arch/sh/include/asm/pgtable_64.h b/arch/sh/include/asm/pgtable_64.h
index dd38158..0ee4677 100644 (file)
--- a/arch/sh/include/asm/pgtable_64.h
+++ b/arch/sh/include/asm/pgtable_64.h
@@ -123,8 +123,21 @@ static __inline__ void set_pte(pte_t *pteptr, pte_t pteval)
 #define _PAGE_DIRTY    0x400  /* software: page accessed in write */
 #define _PAGE_ACCESSED 0x800  /* software: page referenced */
 
+/* Wrapper for extended mode pgprot twiddling */
+#define _PAGE_EXT(x)           ((unsigned long long)(x) << 32)
+
+/*
+ * We can use the sign-extended bits in the PTEL to get 32 bits of
+ * software flags. This works for now because no implementations uses
+ * anything above the PPN field.
+ */
+#define _PAGE_WIRED    _PAGE_EXT(0x001) /* software: wire the tlb entry */
+
+#define _PAGE_CLEAR_FLAGS      (_PAGE_PRESENT | _PAGE_FILE | _PAGE_SHARED | \
+                                _PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_WIRED)
+
 /* Mask which drops software flags */
-#define _PAGE_FLAGS_HARDWARE_MASK      0xfffffffffffff3dbLL
+#define _PAGE_FLAGS_HARDWARE_MASK      (NEFF_MASK & ~(_PAGE_CLEAR_FLAGS))
 
 /*
  * HugeTLB support