MIPS: Add hugetlbfs page defines.

Signed-off-by: David Daney <ddaney@caviumnetworks.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

4 files changed, 32 insertions, 0 deletions

diff --git a/arch/mips/include/asm/mipsregs.h b/arch/mips/include/asm/mipsregs.h
index 32ef8bec5c85..a581d60cbcc2 100644
--- a/arch/mips/include/asm/mipsregs.h
+++ b/arch/mips/include/asm/mipsregs.h
@@ -220,6 +220,22 @@
 #error Bad page size configuration!
 #endif
 
+/*
+ * Default huge tlb size for a given kernel configuration
+ */
+#ifdef CONFIG_PAGE_SIZE_4KB
+#define PM_HUGE_MASK    PM_1M
+#elif defined(CONFIG_PAGE_SIZE_8KB)
+#define PM_HUGE_MASK    PM_4M
+#elif defined(CONFIG_PAGE_SIZE_16KB)
+#define PM_HUGE_MASK    PM_16M
+#elif defined(CONFIG_PAGE_SIZE_32KB)
+#define PM_HUGE_MASK    PM_64M
+#elif defined(CONFIG_PAGE_SIZE_64KB)
+#define PM_HUGE_MASK    PM_256M
+#elif defined(CONFIG_HUGETLB_PAGE)
+#error Bad page size configuration for hugetlbfs!
+#endif
 
 /*
  * Values used for computation of new tlb entries
diff --git a/arch/mips/include/asm/page.h b/arch/mips/include/asm/page.h
index 72c80d2034c2..dc0eaa731281 100644
--- a/arch/mips/include/asm/page.h
+++ b/arch/mips/include/asm/page.h
@@ -32,6 +32,11 @@
 #define PAGE_SIZE       (1UL << PAGE_SHIFT)
 #define PAGE_MASK       (~((1 << PAGE_SHIFT) - 1))
 
+#define HPAGE_SHIFT     (PAGE_SHIFT + PAGE_SHIFT - 3)
+#define HPAGE_SIZE      ((1UL) << HPAGE_SHIFT)
+#define HPAGE_MASK      (~(HPAGE_SIZE - 1))
+#define HUGETLB_PAGE_ORDER      (HPAGE_SHIFT - PAGE_SHIFT)
+
 #ifndef __ASSEMBLY__
 
 #include <linux/pfn.h>
diff --git a/arch/mips/include/asm/pgtable-bits.h b/arch/mips/include/asm/pgtable-bits.h
index 51b34a48c84a..1073e6df8621 100644
--- a/arch/mips/include/asm/pgtable-bits.h
+++ b/arch/mips/include/asm/pgtable-bits.h
@@ -72,6 +72,7 @@
 #else
 
 #define _PAGE_R4KBUG                (1<<5)  /* workaround for r4k bug  */
+#define _PAGE_HUGE                  (1<<5)  /* huge tlb page */
 #define _PAGE_GLOBAL                (1<<6)
 #define _PAGE_VALID                 (1<<7)
 #define _PAGE_SILENT_READ           (1<<7)  /* synonym                 */
diff --git a/arch/mips/include/asm/pgtable.h b/arch/mips/include/asm/pgtable.h
index 6a0edf72ffbc..1a9f9b257551 100644
--- a/arch/mips/include/asm/pgtable.h
+++ b/arch/mips/include/asm/pgtable.h
@@ -292,6 +292,16 @@ static inline pte_t pte_mkyoung(pte_t pte)
                 pte_val(pte) |= _PAGE_SILENT_READ;
         return pte;
 }
+
+#ifdef _PAGE_HUGE
+static inline int pte_huge(pte_t pte)   { return pte_val(pte) & _PAGE_HUGE; }
+
+static inline pte_t pte_mkhuge(pte_t pte)
+{
+        pte_val(pte) |= _PAGE_HUGE;
+        return pte;
+}
+#endif /* _PAGE_HUGE */
 #endif
 static inline int pte_special(pte_t pte)        { return 0; }
 static inline pte_t pte_mkspecial(pte_t pte)    { return pte; }