[MIPS] Unify csum_partial.S

The 32-bit version and 64-bit version are almost equal.  Unify them.  This
makes further improvements (for example, copying with parallel, supporting
PREFETCH, etc.) easier.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

2 files changed, 1 insertions, 243 deletions

diff --git a/arch/mips/lib-64/Makefile b/arch/mips/lib-64/Makefile
index ad285786e74..dcd4d2ed2ac 100644
--- a/arch/mips/lib-64/Makefile
+++ b/arch/mips/lib-64/Makefile
@@ -2,7 +2,7 @@
 # Makefile for MIPS-specific library files..
 #
 
-lib-y	+= csum_partial.o memset.o watch.o
+lib-y	+= memset.o watch.o
 
 obj-$(CONFIG_CPU_MIPS32)	+= dump_tlb.o
 obj-$(CONFIG_CPU_MIPS64)	+= dump_tlb.o
diff --git a/arch/mips/lib-64/csum_partial.S b/arch/mips/lib-64/csum_partial.S
deleted file mode 100644
index 25aba660cc9..00000000000
--- a/arch/mips/lib-64/csum_partial.S
+++ /dev/null
@@ -1,242 +0,0 @@
-/*
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Quick'n'dirty IP checksum ...
- *
- * Copyright (C) 1998, 1999 Ralf Baechle
- * Copyright (C) 1999 Silicon Graphics, Inc.
- */
-#include <asm/asm.h>
-#include <asm/regdef.h>
-
-#define ADDC(sum,reg)						\
-	addu	sum, reg;					\
-	sltu	v1, sum, reg;					\
-	addu	sum, v1
-
-#define CSUM_BIGCHUNK(src, offset, sum, t0, t1, t2, t3)		\
-	lw	t0, (offset + 0x00)(src);			\
-	lw	t1, (offset + 0x04)(src);			\
-	lw	t2, (offset + 0x08)(src); 			\
-	lw	t3, (offset + 0x0c)(src); 			\
-	ADDC(sum, t0);						\
-	ADDC(sum, t1);						\
-	ADDC(sum, t2);						\
-	ADDC(sum, t3);						\
-	lw	t0, (offset + 0x10)(src);			\
-	lw	t1, (offset + 0x14)(src);			\
-	lw	t2, (offset + 0x18)(src);			\
-	lw	t3, (offset + 0x1c)(src);			\
-	ADDC(sum, t0);						\
-	ADDC(sum, t1);						\
-	ADDC(sum, t2);						\
-	ADDC(sum, t3);						\
-
-/*
- * a0: source address
- * a1: length of the area to checksum
- * a2: partial checksum
- */
-
-#define src a0
-#define sum v0
-
-	.text
-	.set	noreorder
-
-/* unknown src alignment and < 8 bytes to go  */
-small_csumcpy:
-	move	a1, ta2
-
-	andi	ta0, a1, 4
-	beqz	ta0, 1f
-	 andi	ta0, a1, 2
-
-	/* Still a full word to go  */
-	ulw	ta1, (src)
-	daddiu	src, 4
-	ADDC(sum, ta1)
-
-1:	move	ta1, zero
-	beqz	ta0, 1f
-	 andi	ta0, a1, 1
-
-	/* Still a halfword to go  */
-	ulhu	ta1, (src)
-	daddiu	src, 2
-
-1:	beqz	ta0, 1f
-	 sll	ta1, ta1, 16
-
-	lbu	ta2, (src)
-	 nop
-
-#ifdef __MIPSEB__
-	sll	ta2, ta2, 8
-#endif
-	or	ta1, ta2
-
-1:	ADDC(sum, ta1)
-
-	/* fold checksum */
-	sll	v1, sum, 16
-	addu	sum, v1
-	sltu	v1, sum, v1
-	srl	sum, sum, 16
-	addu	sum, v1
-
-	/* odd buffer alignment? */
-	beqz	t3, 1f
-	 nop
-	sll	v1, sum, 8
-	srl	sum, sum, 8
-	or	sum, v1
-	andi	sum, 0xffff
-1:
-	.set	reorder
-	/* Add the passed partial csum.  */
-	ADDC(sum, a2)
-	jr	ra
-	.set	noreorder
-
-/* ------------------------------------------------------------------------- */
-
-	.align	5
-LEAF(csum_partial)
-	move	sum, zero
-	move	t3, zero
-
-	sltiu	t8, a1, 0x8
-	bnez	t8, small_csumcpy		/* < 8 bytes to copy */
-	 move	ta2, a1
-
-	beqz	a1, out
-	 andi	t3, src, 0x1			/* odd buffer? */
-
-hword_align:
-	beqz	t3, word_align
-	 andi	t8, src, 0x2
-
-	lbu	ta0, (src)
-	dsubu	a1, a1, 0x1
-#ifdef __MIPSEL__
-	sll	ta0, ta0, 8
-#endif
-	ADDC(sum, ta0)
-	daddu	src, src, 0x1
-	andi	t8, src, 0x2
-
-word_align:
-	beqz	t8, dword_align
-	 sltiu	t8, a1, 56
-
-	lhu	ta0, (src)
-	dsubu	a1, a1, 0x2
-	ADDC(sum, ta0)
-	sltiu	t8, a1, 56
-	daddu	src, src, 0x2
-
-dword_align:
-	bnez	t8, do_end_words
-	 move	t8, a1
-
-	andi	t8, src, 0x4
-	beqz	t8, qword_align
-	 andi	t8, src, 0x8
-
-	lw	ta0, 0x00(src)
-	dsubu	a1, a1, 0x4
-	ADDC(sum, ta0)
-	daddu	src, src, 0x4
-	andi	t8, src, 0x8
-
-qword_align:
-	beqz	t8, oword_align
-	 andi	t8, src, 0x10
-
-	lw	ta0, 0x00(src)
-	lw	ta1, 0x04(src)
-	dsubu	a1, a1, 0x8
-	ADDC(sum, ta0)
-	ADDC(sum, ta1)
-	daddu	src, src, 0x8
-	andi	t8, src, 0x10
-
-oword_align:
-	beqz	t8, begin_movement
-	 dsrl	t8, a1, 0x7
-
-	lw	ta3, 0x08(src)
-	lw	t0, 0x0c(src)
-	lw	ta0, 0x00(src)
-	lw	ta1, 0x04(src)
-	ADDC(sum, ta3)
-	ADDC(sum, t0)
-	ADDC(sum, ta0)
-	ADDC(sum, ta1)
-	dsubu	a1, a1, 0x10
-	daddu	src, src, 0x10
-	dsrl	t8, a1, 0x7
-
-begin_movement:
-	beqz	t8, 1f
-	 andi	ta2, a1, 0x40
-
-move_128bytes:
-	CSUM_BIGCHUNK(src, 0x00, sum, ta0, ta1, ta3, t0)
-	CSUM_BIGCHUNK(src, 0x20, sum, ta0, ta1, ta3, t0)
-	CSUM_BIGCHUNK(src, 0x40, sum, ta0, ta1, ta3, t0)
-	CSUM_BIGCHUNK(src, 0x60, sum, ta0, ta1, ta3, t0)
-	dsubu	t8, t8, 0x01
-	bnez	t8, move_128bytes
-	 daddu	src, src, 0x80
-
-1:
-	beqz	ta2, 1f
-	 andi	ta2, a1, 0x20
-
-move_64bytes:
-	CSUM_BIGCHUNK(src, 0x00, sum, ta0, ta1, ta3, t0)
-	CSUM_BIGCHUNK(src, 0x20, sum, ta0, ta1, ta3, t0)
-	daddu	src, src, 0x40
-
-1:
-	beqz	ta2, do_end_words
-	 andi	t8, a1, 0x1c
-
-move_32bytes:
-	CSUM_BIGCHUNK(src, 0x00, sum, ta0, ta1, ta3, t0)
-	andi	t8, a1, 0x1c
-	daddu	src, src, 0x20
-
-do_end_words:
-	beqz	t8, maybe_end_cruft
-	 dsrl	t8, t8, 0x2
-
-end_words:
-	lw	ta0, (src)
-	dsubu	t8, t8, 0x1
-	ADDC(sum, ta0)
-	bnez	t8, end_words
-	 daddu	src, src, 0x4
-
-maybe_end_cruft:
-	andi	ta2, a1, 0x3
-
-small_memcpy:
- j small_csumcpy; move a1, ta2		/* XXX ??? */
-	beqz	t2, out
-	 move	a1, ta2
-
-end_bytes:
-	lb	ta0, (src)
-	dsubu	a1, a1, 0x1
-	bnez	a2, end_bytes
-	 daddu	src, src, 0x1
-
-out:
-	jr	ra
-	 move	v0, sum
-	END(csum_partial)