powerpc/mm: Move hash specific pte bits to be top bits of RPN

[karo-tx-linux.git] / arch / powerpc / include / asm / book3s / 64 / pgtable.h

diff --git a/arch/powerpc/include/asm/book3s/64/pgtable.h b/arch/powerpc/include/asm/book3s/64/pgtable.h
index 1f9e9848bbd595c83a87b61789c962a368ad6222..fb72ff6b98e63cc77e7ad48c08b62b888a494415 100644 (file)
--- a/arch/powerpc/include/asm/book3s/64/pgtable.h
+++ b/arch/powerpc/include/asm/book3s/64/pgtable.h
@@ -36,8 +36,21 @@
 #define _RPAGE_RSV2            0x0800000000000000UL
 #define _RPAGE_RSV3            0x0400000000000000UL
 #define _RPAGE_RSV4            0x0200000000000000UL
+
+#define _PAGE_PTE              0x4000000000000000UL    /* distinguishes PTEs from pointers */
+#define _PAGE_PRESENT          0x8000000000000000UL    /* pte contains a translation */
+
+/*
+ * Top and bottom bits of RPN which can be used by hash
+ * translation mode, because we expect them to be zero
+ * otherwise.
+ */
 #define _RPAGE_RPN0            0x01000
 #define _RPAGE_RPN1            0x02000
+#define _RPAGE_RPN44           0x0100000000000000UL
+#define _RPAGE_RPN43           0x0080000000000000UL
+#define _RPAGE_RPN42           0x0040000000000000UL
+#define _RPAGE_RPN41           0x0020000000000000UL
 
 /* Max physical address bit as per radix table */
 #define _RPAGE_PA_MAX          57
@@ -65,9 +78,6 @@
 
 #define _PAGE_SOFT_DIRTY       _RPAGE_SW3 /* software: software dirty tracking */
 #define _PAGE_SPECIAL          _RPAGE_SW2 /* software: special page */
-
-#define _PAGE_PTE              0x4000000000000000UL    /* distinguishes PTEs from pointers */
-#define _PAGE_PRESENT          0x8000000000000000UL    /* pte contains a translation */
 /*
  * Drivers request for cache inhibited pte mapping using _PAGE_NO_CACHE
  * Instead of fixing all of them, add an alternate define which