patch-2.4.4 linux/include/asm-s390/page.h

• Lines: 60
• Date: Wed Apr 11 19:02:28 2001
• Orig file: v2.4.3/linux/include/asm-s390/page.h
• Orig date: Tue Feb 13 14:13:44 2001

diff -u --recursive --new-file v2.4.3/linux/include/asm-s390/page.h linux/include/asm-s390/page.h
@@ -9,6 +9,9 @@
 #ifndef _S390_PAGE_H
 #define _S390_PAGE_H
 
+#include <asm/setup.h>
+#include <asm/types.h>
+
 /* PAGE_SHIFT determines the page size */
 #define PAGE_SHIFT      12
 #define PAGE_SIZE       (1UL << PAGE_SHIFT)
@@ -17,12 +20,44 @@
 #ifdef __KERNEL__
 #ifndef __ASSEMBLY__
 
-/*
- * gcc uses builtin, i.e. MVCLE for both operations
- */
+static inline void clear_page(void *page)
+{
+	register_pair rp;
+
+	rp.subreg.even = (unsigned long) page;
+	rp.subreg.odd = (unsigned long) 4096;
+        asm volatile ("   slr  1,1\n"
+		      "   mvcl %0,0"
+		      : "+&a" (rp) : : "memory", "1" );
+}
 
-#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 ("   sr   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)