score: Add support for Sunplus S+core architecture

This is the complete set of new arch Score's files for linux.
Score instruction set support 16bits, 32bits and 64bits instruction,
Score SOC had been used in game machine and LCD TV.

Signed-off-by: Chen Liqin <liqin.chen@sunplusct.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

1 files changed, 196 insertions, 0 deletions

diff --git a/arch/score/lib/string.S b/arch/score/lib/string.S
new file mode 100644
index 000000000000..943d0911ea89
--- /dev/null
+++ b/arch/score/lib/string.S
@@ -0,0 +1,196 @@
+/*
+ * arch/score/lib/string.S
+ *
+ * Score Processor version.
+ *
+ * Copyright (C) 2009 Sunplus Core Technology Co., Ltd.
+ *  Chen Liqin <liqin.chen@sunplusct.com>
+ *  Lennox Wu <lennox.wu@sunplusct.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see the file COPYING, or write
+ * to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#include <linux/linkage.h>
+#include <asm-generic/errno.h>
+
+	.text
+	.align 2
+ENTRY(__strncpy_from_user)
+	cmpi.c	r6, 0
+	mv	r9, r6
+	ble	.L2
+0:	lbu	r7, [r5]
+	ldi	r8, 0
+1:	sb	r7, [r4]
+2:	lb	r6, [r5]
+	cmp.c	r6, r8
+	beq	.L2
+
+.L5:
+	addi	r8, 1
+	cmp.c	r8, r9
+	beq	.L7
+3:	lbu	r6, [r5, 1]+
+4:	sb	r6, [r4, 1]+
+5:	lb	r7, [r5]
+	cmpi.c	r7, 0
+	bne	.L5
+.L7:
+	mv	r4, r8
+	br	r3
+.L2:
+	ldi	r8, 0
+	mv	r4, r8
+	br	r3
+	.section .fixup, "ax"
+99:
+	ldi	r4, -EFAULT
+	br	r3
+	.previous
+	.section __ex_table, "a"
+	.align	2
+	.word	0b ,99b
+	.word	1b ,99b
+	.word	2b ,99b
+	.word	3b ,99b
+	.word	4b ,99b
+	.word	5b ,99b
+	.previous
+
+	.align 2
+ENTRY(__strnlen_user)
+	cmpi.c	r5, 0
+	ble	.L11
+0:	lb	r6, [r4]
+	ldi	r7, 0
+	cmp.c	r6, r7
+	beq	.L11
+.L15:
+	addi	r7, 1
+	cmp.c	r7, r5
+	beq	.L23
+1:	lb	r6, [r4,1]+
+	cmpi.c	r6, 0
+	bne	.L15
+.L23:
+	addri	r4, r7, 1
+	br	r3
+
+.L11:
+	ldi	r4, 1
+	br	r3
+	.section .fixup, "ax"
+99:
+	ldi	r4, 0
+	br	r3
+
+	.section __ex_table,"a"
+	.align 2
+	.word	0b, 99b
+	.word	1b, 99b
+	.previous
+
+	.align 2
+ENTRY(__strlen_user)
+0:	lb	r6, [r4]
+	mv	r7, r4
+	extsb	r6, r6
+	cmpi.c	r6, 0
+	mv	r4, r6
+	beq	.L27
+.L28:
+1:	lb	r6, [r7, 1]+
+	addi	r6, 1
+	cmpi.c	r6, 0
+	bne	.L28
+.L27:
+	br	r3
+	.section .fixup, "ax"
+	ldi	r4, 0x0
+	br	r3
+99:
+	ldi	r4, 0
+	br	r3
+	.previous
+	.section __ex_table, "a"
+	.align	2
+	.word	0b ,99b
+	.word	1b ,99b
+	.previous
+
+	.align 2
+ENTRY(__copy_tofrom_user)
+	cmpi.c	r6, 0
+	mv	r10,r6
+	beq	.L32
+	ldi	r9, 0
+.L34:
+	add	r6, r5, r9
+0:	lbu	r8, [r6]
+	add	r7, r4, r9
+1:	sb	r8, [r7]
+	addi	r9, 1
+	cmp.c	r9, r10
+	bne	.L34
+.L32:
+	ldi	r4, 0
+	br	r3
+	.section .fixup, "ax"
+99:
+	sub	r4, r10, r9
+	br	r3
+	.previous
+	.section __ex_table, "a"
+	.align	2
+	.word	0b, 99b
+	.word	1b, 99b
+	.previous
+
+	.align 2
+ENTRY(__clear_user)
+	cmpi.c	r5, 0
+	beq	.L38
+	ldi	r6, 0
+	mv	r7, r6
+.L40:
+	addi	r6, 1
+0:	sb	r7, [r4]+, 1
+	cmp.c	r6, r5
+	bne	.L40
+.L38:
+	ldi	r4, 0
+	br	r3
+
+	.section .fixup, "ax"
+	br	r3
+	.previous
+	.section __ex_table, "a"
+	.align	2
+99:
+	.word	0b, 99b
+	.previous
+
+	.align	2
+ENTRY(__put_user_unknown)
+	.set volatile
+	ldi	r4, -EFAULT
+	br	r3
+
+	.align	2
+ENTRY(__get_user_unknown)
+	ldi	r5, 0
+	ldi	r4, -EFAULT
+	br	r3