MIPS: Add hugetlbfs page defines.

Signed-off-by: David Daney <[e-mail]>
Signed-off-by: Ralf Baechle <[e-mail]>

arch/mips/include/asm/mipsregs.h

···
 #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

arch/mips/include/asm/page.h

···
 #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>

arch/mips/include/asm/pgtable-bits.h

···
 #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                 */

arch/mips/include/asm/pgtable.h

···
 		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; }