1 files changed, 93 insertions, 105 deletions
diff --git a/arch/powerpc/lib/copypage_64.S b/arch/powerpc/lib/copypage_64.S
index f9837f44ac0b..75f3267fdc30 100644
--- a/arch/powerpc/lib/copypage_64.S
+++ b/arch/powerpc/lib/copypage_64.S
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2002 Paul Mackerras, IBM Corp.
+ * Copyright (C) 2008 Mark Nelson, IBM Corp.
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
@@ -8,112 +8,100 @@
  */
 #include <asm/processor.h>
 #include <asm/ppc_asm.h>
+#include <asm/asm-offsets.h>
+
+        .section        ".toc","aw"
+PPC64_CACHES:
+        .tc             ppc64_caches[TC],ppc64_caches
+        .section        ".text"
+
 
 _GLOBAL(copy_4K_page)
-	std	r31,-8(1)
-	std	r30,-16(1)
-	std	r29,-24(1)
-	std	r28,-32(1)
-	std	r27,-40(1)
-	std	r26,-48(1)
-	std	r25,-56(1)
-	std	r24,-64(1)
-	std	r23,-72(1)
-	std	r22,-80(1)
-	std	r21,-88(1)
-	std	r20,-96(1)
-	li	r5,4096/32 - 1
+	li	r5,4096		/* 4K page size */
+BEGIN_FTR_SECTION
+	ld      r10,PPC64_CACHES@toc(r2)
+	lwz	r11,DCACHEL1LOGLINESIZE(r10)	/* log2 of cache line size */
+	lwz     r12,DCACHEL1LINESIZE(r10)	/* get cache line size */
+	li	r9,0
+	srd	r8,r5,r11
+
+	mtctr	r8
+setup:
+	dcbt	r9,r4
+	dcbz	r9,r3
+	add	r9,r9,r12
+	bdnz	setup
+END_FTR_SECTION_IFSET(CPU_FTR_CP_USE_DCBTZ)
 	addi	r3,r3,-8
-	li	r12,5
-0:	addi	r5,r5,-24
-	mtctr	r12
-	ld	r22,640(4)
-	ld	r21,512(4)
-	ld	r20,384(4)
-	ld	r11,256(4)
-	ld	r9,128(4)
-	ld	r7,0(4)
-	ld	r25,648(4)
-	ld	r24,520(4)
-	ld	r23,392(4)
-	ld	r10,264(4)
-	ld	r8,136(4)
-	ldu	r6,8(4)
-	cmpwi	r5,24
-1:	std	r22,648(3)
-	std	r21,520(3)
-	std	r20,392(3)
-	std	r11,264(3)
-	std	r9,136(3)
-	std	r7,8(3)
-	ld	r28,648(4)
-	ld	r27,520(4)
-	ld	r26,392(4)
-	ld	r31,264(4)
-	ld	r30,136(4)
-	ld	r29,8(4)
-	std	r25,656(3)
-	std	r24,528(3)
-	std	r23,400(3)
-	std	r10,272(3)
-	std	r8,144(3)
-	std	r6,16(3)
-	ld	r22,656(4)
-	ld	r21,528(4)
-	ld	r20,400(4)
-	ld	r11,272(4)
-	ld	r9,144(4)
-	ld	r7,16(4)
-	std	r28,664(3)
-	std	r27,536(3)
-	std	r26,408(3)
-	std	r31,280(3)
-	std	r30,152(3)
-	stdu	r29,24(3)
-	ld	r25,664(4)
-	ld	r24,536(4)
-	ld	r23,408(4)
-	ld	r10,280(4)
-	ld	r8,152(4)
-	ldu	r6,24(4)
+	srdi    r8,r5,7		/* page is copied in 128 byte strides */
+	addi	r8,r8,-1	/* one stride copied outside loop */
+
+	mtctr	r8
+
+	ld	r5,0(r4)
+	ld	r6,8(r4)
+	ld	r7,16(r4)
+	ldu	r8,24(r4)
+1:	std	r5,8(r3)
+	ld	r9,8(r4)
+	std	r6,16(r3)
+	ld	r10,16(r4)
+	std	r7,24(r3)
+	ld	r11,24(r4)
+	std	r8,32(r3)
+	ld	r12,32(r4)
+	std	r9,40(r3)
+	ld	r5,40(r4)
+	std	r10,48(r3)
+	ld	r6,48(r4)
+	std	r11,56(r3)
+	ld	r7,56(r4)
+	std	r12,64(r3)
+	ld	r8,64(r4)
+	std	r5,72(r3)
+	ld	r9,72(r4)
+	std	r6,80(r3)
+	ld	r10,80(r4)
+	std	r7,88(r3)
+	ld	r11,88(r4)
+	std	r8,96(r3)
+	ld	r12,96(r4)
+	std	r9,104(r3)
+	ld	r5,104(r4)
+	std	r10,112(r3)
+	ld	r6,112(r4)
+	std	r11,120(r3)
+	ld	r7,120(r4)
+	stdu	r12,128(r3)
+	ldu	r8,128(r4)
 	bdnz	1b
-	std	r22,648(3)
-	std	r21,520(3)
-	std	r20,392(3)
-	std	r11,264(3)
-	std	r9,136(3)
-	std	r7,8(3)
-	addi	r4,r4,640
-	addi	r3,r3,648
-	bge	0b
-	mtctr	r5
-	ld	r7,0(4)
-	ld	r8,8(4)
-	ldu	r9,16(4)
-3:	ld	r10,8(4)
-	std	r7,8(3)
-	ld	r7,16(4)
-	std	r8,16(3)
-	ld	r8,24(4)
-	std	r9,24(3)
-	ldu	r9,32(4)
-	stdu	r10,32(3)
-	bdnz	3b
-4:	ld	r10,8(4)
-	std	r7,8(3)
-	std	r8,16(3)
-	std	r9,24(3)
-	std	r10,32(3)
-9:	ld	r20,-96(1)
-	ld	r21,-88(1)
-	ld	r22,-80(1)
-	ld	r23,-72(1)
-	ld	r24,-64(1)
-	ld	r25,-56(1)
-	ld	r26,-48(1)
-	ld	r27,-40(1)
-	ld	r28,-32(1)
-	ld	r29,-24(1)
-	ld	r30,-16(1)
-	ld	r31,-8(1)
+
+	std	r5,8(r3)
+	ld	r9,8(r4)
+	std	r6,16(r3)
+	ld	r10,16(r4)
+	std	r7,24(r3)
+	ld	r11,24(r4)
+	std	r8,32(r3)
+	ld	r12,32(r4)
+	std	r9,40(r3)
+	ld	r5,40(r4)
+	std	r10,48(r3)
+	ld	r6,48(r4)
+	std	r11,56(r3)
+	ld	r7,56(r4)
+	std	r12,64(r3)
+	ld	r8,64(r4)
+	std	r5,72(r3)
+	ld	r9,72(r4)
+	std	r6,80(r3)
+	ld	r10,80(r4)
+	std	r7,88(r3)
+	ld	r11,88(r4)
+	std	r8,96(r3)
+	ld	r12,96(r4)
+	std	r9,104(r3)
+	std	r10,112(r3)
+	std	r11,120(r3)
+	std	r12,128(r3)
 	blr