patch-2.4.4 linux/include/asm-s390x/page.h

• Lines: 58
• Date: Wed Apr 11 19:02:29 2001
• Orig file: v2.4.3/linux/include/asm-s390x/page.h
• Orig date: Tue Feb 13 14:13:44 2001

diff -u --recursive --new-file v2.4.3/linux/include/asm-s390x/page.h linux/include/asm-s390x/page.h
@@ -9,6 +9,8 @@
 #ifndef _S390_PAGE_H
 #define _S390_PAGE_H
 
+#include <asm/setup.h>
+
 /* PAGE_SHIFT determines the page size */
 #define PAGE_SHIFT      12
 #define PAGE_SIZE       (1UL << PAGE_SHIFT)
@@ -17,12 +19,43 @@
 #ifdef __KERNEL__
 #ifndef __ASSEMBLY__
 
-/*
- * gcc uses builtin, i.e. MVCLE for both operations
- */
+static inline void clear_page(void *page)
+{
+        asm volatile ("   lgr  2,%0\n"
+                      "   lghi 3,4096\n"
+                      "   slgr 1,1\n"
+                      "   mvcl 2,0"
+                      : : "a" ((void *) (page))
+		      : "memory", "1", "2", "3" );
+}
 
-#define clear_page(page)        memset((void *)(page), 0, PAGE_SIZE)
-#define copy_page(to,from)      memcpy((void *)(to), (void *)(from), PAGE_SIZE)
+static inline void copy_page(void *to, void *from)
+{
+        if (MACHINE_HAS_MVPG)
+		asm volatile ("   sgr  0,0\n"
+			      "   mvpg %0,%1"
+			      : : "a" ((void *)(to)), "a" ((void *)(from))
+			      : "memory", "0" );
+	else
+		asm volatile ("   mvc  0(256,%0),0(%1)\n"
+			      "   mvc  256(256,%0),256(%1)\n"
+			      "   mvc  512(256,%0),512(%1)\n"
+			      "   mvc  768(256,%0),768(%1)\n"
+			      "   mvc  1024(256,%0),1024(%1)\n"
+			      "   mvc  1280(256,%0),1280(%1)\n"
+			      "   mvc  1536(256,%0),1536(%1)\n"
+			      "   mvc  1792(256,%0),1792(%1)\n"
+			      "   mvc  2048(256,%0),2048(%1)\n"
+			      "   mvc  2304(256,%0),2304(%1)\n"
+			      "   mvc  2560(256,%0),2560(%1)\n"
+			      "   mvc  2816(256,%0),2816(%1)\n"
+			      "   mvc  3072(256,%0),3072(%1)\n"
+			      "   mvc  3328(256,%0),3328(%1)\n"
+			      "   mvc  3584(256,%0),3584(%1)\n"
+			      "   mvc  3840(256,%0),3840(%1)\n"
+			      : : "a"((void *)(to)),"a"((void *)(from)) 
+			      : "memory" );
+}
 
 #define clear_user_page(page, vaddr)    clear_page(page)
 #define copy_user_page(to, from, vaddr) copy_page(to, from)