[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 fe7f92b6ae6df2c415688fa52a7d4b1157ac2641..b01e6fc9a2953e5e254e74e8ad0f1592c5f8cab8 100644 (file)
--- a/include/asm-s390/page.h
+++ b/include/asm-s390/page.h
@@ -19,17 +19,34 @@
 #define PAGE_DEFAULT_ACC       0
 #define PAGE_DEFAULT_KEY       (PAGE_DEFAULT_ACC << 4)
 
+#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)