patch-2.4.26 linux-2.4.26/arch/ppc/kernel/misc.S

• Lines: 61
• Date: 2004-04-14 06:05:27.000000000 -0700
• Orig file: linux-2.4.25/arch/ppc/kernel/misc.S
• Orig date: 2003-11-28 10:26:19.000000000 -0800

diff -urN linux-2.4.25/arch/ppc/kernel/misc.S linux-2.4.26/arch/ppc/kernel/misc.S
@@ -694,29 +694,36 @@
 _GLOBAL(copy_page)
 	addi	r3,r3,-4
 	addi	r4,r4,-4
+
+#ifdef CONFIG_8xx
+	/* don't use prefetch on 8xx */
+    	li	r0,4096/L1_CACHE_LINE_SIZE
+	mtctr	r0
+1:	COPY_16_BYTES
+	bdnz	1b
+	blr
+
+#else	/* not 8xx, we can prefetch */
 	li	r5,4
 
-#ifndef CONFIG_8xx
-#if MAX_L1_COPY_PREFETCH > 1
-	li	r0,MAX_L1_COPY_PREFETCH
+#if MAX_COPY_PREFETCH > 1
+	li	r0,MAX_COPY_PREFETCH
 	li	r11,4
 	mtctr	r0
 11:	dcbt	r11,r4
 	addi	r11,r11,L1_CACHE_LINE_SIZE
 	bdnz	11b
-#else /* MAX_L1_COPY_PREFETCH == 1 */
+#else /* MAX_COPY_PREFETCH == 1 */
 	dcbt	r5,r4
 	li	r11,L1_CACHE_LINE_SIZE+4
-#endif /* MAX_L1_COPY_PREFETCH */
-#endif /* CONFIG_8xx */
-
-	li	r0,4096/L1_CACHE_LINE_SIZE
+#endif /* MAX_COPY_PREFETCH */
+	li	r0,4096/L1_CACHE_LINE_SIZE - MAX_COPY_PREFETCH
+	crclr	4*cr0+eq
+2:
 	mtctr	r0
 1:
-#ifndef CONFIG_8xx
 	dcbt	r11,r4
 	dcbz	r5,r3
-#endif
 	COPY_16_BYTES
 #if L1_CACHE_LINE_SIZE >= 32
 	COPY_16_BYTES
@@ -732,7 +739,12 @@
 #endif
 #endif
 	bdnz	1b
-	blr
+	beqlr
+	crnot	4*cr0+eq,4*cr0+eq
+	li	r0,MAX_COPY_PREFETCH
+	li	r11,4
+	b	2b
+#endif	/* CONFIG_8xx */
 
 /*
  * Atomic [test&set] exchange