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authorSteven J. Hill <Steven.Hill@imgtec.com>2014-11-13 09:52:01 -0600
committerRalf Baechle <ralf@linux-mips.org>2014-11-24 22:47:31 +0100
commit77a5c59332aa75e66f0d95f9eeb69baf3c68970d (patch)
tree056fbf0cf9ad46977342474e706ac5162a1a1b15 /arch/mips/include/asm/pgtable-bits.h
parent23d06e4fb7138e29ef77edf2fa918acc20ad5f8d (diff)
MIPS: Cosmetic cleanups of page table headers.
* Clean up white spaces and tabs. * Remove _PAGE_R4KBUG which is no longer used. * Get rid of hardcoded values and calculate shifts and masks where possible. Signed-off-by: Steven J. Hill <Steven.Hill@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/8457/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/include/asm/pgtable-bits.h')
-rw-r--r--arch/mips/include/asm/pgtable-bits.h32
1 files changed, 17 insertions, 15 deletions
diff --git a/arch/mips/include/asm/pgtable-bits.h b/arch/mips/include/asm/pgtable-bits.h
index 29ba35954e2e..ca11f14f40a3 100644
--- a/arch/mips/include/asm/pgtable-bits.h
+++ b/arch/mips/include/asm/pgtable-bits.h
@@ -37,34 +37,36 @@
/*
* The following bits are directly used by the TLB hardware
*/
-#define _PAGE_R4KBUG (1 << 0) /* workaround for r4k bug */
-#define _PAGE_GLOBAL (1 << 0)
-#define _PAGE_VALID_SHIFT 1
+#define _PAGE_GLOBAL_SHIFT 0
+#define _PAGE_GLOBAL (1 << _PAGE_GLOBAL_SHIFT)
+#define _PAGE_VALID_SHIFT (_PAGE_GLOBAL_SHIFT + 1)
#define _PAGE_VALID (1 << _PAGE_VALID_SHIFT)
-#define _PAGE_SILENT_READ (1 << 1) /* synonym */
-#define _PAGE_DIRTY_SHIFT 2
-#define _PAGE_DIRTY (1 << _PAGE_DIRTY_SHIFT) /* The MIPS dirty bit */
-#define _PAGE_SILENT_WRITE (1 << 2)
-#define _CACHE_SHIFT 3
-#define _CACHE_MASK (7 << 3)
+#define _PAGE_DIRTY_SHIFT (_PAGE_VALID_SHIFT + 1)
+#define _PAGE_DIRTY (1 << _PAGE_DIRTY_SHIFT)
+#define _CACHE_SHIFT (_PAGE_DIRTY_SHIFT + 1)
+#define _CACHE_MASK (7 << _CACHE_SHIFT)
/*
* The following bits are implemented in software
*
* _PAGE_FILE semantics: set:pagecache unset:swap
*/
-#define _PAGE_PRESENT_SHIFT 6
+#define _PAGE_PRESENT_SHIFT (_CACHE_SHIFT + 3)
#define _PAGE_PRESENT (1 << _PAGE_PRESENT_SHIFT)
-#define _PAGE_READ_SHIFT 7
+#define _PAGE_READ_SHIFT (_PAGE_PRESENT_SHIFT + 1)
#define _PAGE_READ (1 << _PAGE_READ_SHIFT)
-#define _PAGE_WRITE_SHIFT 8
+#define _PAGE_WRITE_SHIFT (_PAGE_READ_SHIFT + 1)
#define _PAGE_WRITE (1 << _PAGE_WRITE_SHIFT)
-#define _PAGE_ACCESSED_SHIFT 9
+#define _PAGE_ACCESSED_SHIFT (_PAGE_WRITE_SHIFT + 1)
#define _PAGE_ACCESSED (1 << _PAGE_ACCESSED_SHIFT)
-#define _PAGE_MODIFIED_SHIFT 10
+#define _PAGE_MODIFIED_SHIFT (_PAGE_ACCESSED_SHIFT + 1)
#define _PAGE_MODIFIED (1 << _PAGE_MODIFIED_SHIFT)
-#define _PAGE_FILE (1 << 10)
+#define _PAGE_SILENT_READ _PAGE_VALID
+#define _PAGE_SILENT_WRITE _PAGE_DIRTY
+#define _PAGE_FILE _PAGE_MODIFIED
+
+#define _PFN_SHIFT (PAGE_SHIFT - 12 + _CACHE_SHIFT + 3)
#elif defined(CONFIG_CPU_R3000) || defined(CONFIG_CPU_TX39XX)