[S390] System z large page support.

[linux-2.6-omap-h63xx.git] / include / asm-s390 / page.h

diff --git a/include/asm-s390/page.h b/include/asm-s390/page.h
index 584d0ee3c7f60de6f2a0534dc39e2df4ddeaf1b4..b01e6fc9a2953e5e254e74e8ad0f1592c5f8cab8 100644 (file)
--- a/include/asm-s390/page.h
+++ b/include/asm-s390/page.h
@@ -19,18 +19,34 @@
 #define PAGE_DEFAULT_ACC       0
 #define PAGE_DEFAULT_KEY       (PAGE_DEFAULT_ACC << 4)
 
-#ifdef __KERNEL__
+#define HPAGE_SHIFT    20
+#define HPAGE_SIZE     (1UL << HPAGE_SHIFT)
+#define HPAGE_MASK     (~(HPAGE_SIZE - 1))
+#define HUGETLB_PAGE_ORDER     (HPAGE_SHIFT - PAGE_SHIFT)
+
+#define ARCH_HAS_SETCLEAR_HUGE_PTE
+#define ARCH_HAS_HUGE_PTE_TYPE
+#define ARCH_HAS_PREPARE_HUGEPAGE
+#define ARCH_HAS_HUGEPAGE_CLEAR_FLUSH
+
 #include <asm/setup.h>
 #ifndef __ASSEMBLY__
 
 static inline void clear_page(void *page)
 {
-       register unsigned long reg1 asm ("1") = 0;
-       register void *reg2 asm ("2") = page;
-       register unsigned long reg3 asm ("3") = 4096;
-       asm volatile(
-               "       mvcl    2,0"
-               : "+d" (reg2), "+d" (reg3) : "d" (reg1) : "memory", "cc");
+       if (MACHINE_HAS_PFMF) {
+               asm volatile(
+                       "       .insn   rre,0xb9af0000,%0,%1"
+                       : : "d" (0x10000), "a" (page) : "memory", "cc");
+       } else {
+               register unsigned long reg1 asm ("1") = 0;
+               register void *reg2 asm ("2") = page;
+               register unsigned long reg3 asm ("3") = 4096;
+               asm volatile(
+                       "       mvcl    2,0"
+                       : "+d" (reg2), "+d" (reg3) : "d" (reg1)
+                       : "memory", "cc");
+       }
 }
 
 static inline void copy_page(void *to, void *from)
@@ -75,41 +91,17 @@ static inline void copy_page(void *to, void *from)
 
 typedef struct { unsigned long pgprot; } pgprot_t;
 typedef struct { unsigned long pte; } pte_t;
-
-#define pte_val(x)      ((x).pte)
-#define pgprot_val(x)   ((x).pgprot)
-
-#ifndef __s390x__
-
 typedef struct { unsigned long pmd; } pmd_t;
 typedef struct { unsigned long pud; } pud_t;
-typedef struct {
-        unsigned long pgd0;
-        unsigned long pgd1;
-        unsigned long pgd2;
-        unsigned long pgd3;
-        } pgd_t;
-
-#define pmd_val(x)      ((x).pmd)
-#define pud_val(x)     ((x).pud)
-#define pgd_val(x)      ((x).pgd0)
-
-#else /* __s390x__ */
-
-typedef struct { 
-        unsigned long pmd0;
-        unsigned long pmd1; 
-        } pmd_t;
-typedef struct { unsigned long pud; } pud_t;
 typedef struct { unsigned long pgd; } pgd_t;
+typedef pte_t *pgtable_t;
 
-#define pmd_val(x)      ((x).pmd0)
-#define pmd_val1(x)     ((x).pmd1)
+#define pgprot_val(x)  ((x).pgprot)
+#define pte_val(x)     ((x).pte)
+#define pmd_val(x)     ((x).pmd)
 #define pud_val(x)     ((x).pud)
 #define pgd_val(x)      ((x).pgd)
 
-#endif /* __s390x__ */
-
 #define __pte(x)        ((pte_t) { (x) } )
 #define __pmd(x)        ((pmd_t) { (x) } )
 #define __pgd(x)        ((pgd_t) { (x) } )
@@ -166,12 +158,10 @@ static inline int pfn_valid(unsigned long pfn)
 #define page_to_phys(page)     (page_to_pfn(page) << PAGE_SHIFT)
 #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
 
-#define VM_DATA_DEFAULT_FLAGS  (VM_READ | VM_WRITE | VM_EXEC | \
+#define VM_DATA_DEFAULT_FLAGS  (VM_READ | VM_WRITE | \
                                 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
 
 #include <asm-generic/memory_model.h>
 #include <asm-generic/page.h>
 
-#endif /* __KERNEL__ */
-
 #endif /* _S390_PAGE_H */