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Date: Tue, 9 Jun 2009 14:37:57 +0800
From: liqin.chen@...plusct.com
To: linux-arch@...r.kernel.org, linux-kernel@...r.kernel.org
Cc: Arnd Bergmann <arnd@...db.de>,
Andrew Morton <akpm@...ux-foundation.org>,
torvalds@...ux-foundation.org
Subject: [PATCH 25/27] score: create lib files libgcc.h lshrdi3.c Makefile string.S
ucmpdi2.c
>From 08bc9cdf7162a2c2f1029ca72f074d881974956f Mon Sep 17 00:00:00 2001
From: Chen Liqin <liqin.chen@...plusct.com>
Date: Tue, 9 Jun 2009 13:43:19 +0800
Subject: [PATCH 25/27] score: create lib files libgcc.h lshrdi3.c Makefile
string.S ucmpdi2.c
Signed-off-by: Chen Liqin <liqin.chen@...plusct.com>
---
arch/score/lib/Makefile | 8 ++
arch/score/lib/libgcc.h | 37 +++++++++
arch/score/lib/lshrdi3.c | 47 +++++++++++
arch/score/lib/string.S | 203
++++++++++++++++++++++++++++++++++++++++++++++
arch/score/lib/ucmpdi2.c | 38 +++++++++
5 files changed, 333 insertions(+), 0 deletions(-)
create mode 100644 arch/score/lib/Makefile
create mode 100644 arch/score/lib/libgcc.h
create mode 100644 arch/score/lib/lshrdi3.c
create mode 100644 arch/score/lib/string.S
create mode 100644 arch/score/lib/ucmpdi2.c
diff --git a/arch/score/lib/Makefile b/arch/score/lib/Makefile
new file mode 100644
index 0000000..553e30e
--- /dev/null
+++ b/arch/score/lib/Makefile
@@ -0,0 +1,8 @@
+#
+# Makefile for SCORE-specific library files..
+#
+
+lib-y += string.o checksum.o checksum_copy.o
+
+# libgcc-style stuff needed in the kernel
+obj-y += ashldi3.o ashrdi3.o cmpdi2.o lshrdi3.o ucmpdi2.o
diff --git a/arch/score/lib/libgcc.h b/arch/score/lib/libgcc.h
new file mode 100644
index 0000000..0f12543
--- /dev/null
+++ b/arch/score/lib/libgcc.h
@@ -0,0 +1,37 @@
+/*
+ * arch/score/lib/libgcc.h
+ *
+ * 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
+ */
+
+
+#ifndef __ASM_LIBGCC_H
+#define __ASM_LIBGCC_H
+
+#include <asm/byteorder.h>
+
+typedef int word_type __attribute__((mode(__word__)));
+
+struct DWstruct {
+ int low, high;
+};
+
+typedef union {
+ struct DWstruct s;
+ long long ll;
+} DWunion;
+
+#endif /* __ASM_LIBGCC_H */
diff --git a/arch/score/lib/lshrdi3.c b/arch/score/lib/lshrdi3.c
new file mode 100644
index 0000000..ce21175
--- /dev/null
+++ b/arch/score/lib/lshrdi3.c
@@ -0,0 +1,47 @@
+/*
+ * arch/score/lib/lshrdi3.c
+ *
+ * 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/module.h>
+#include "libgcc.h"
+
+long long __lshrdi3(long long u, word_type b)
+{
+ DWunion uu, w;
+ word_type bm;
+
+ if (b == 0)
+ return u;
+
+ uu.ll = u;
+ bm = 32 - b;
+
+ if (bm <= 0) {
+ w.s.high = 0;
+ w.s.low = (unsigned int) uu.s.high >> -bm;
+ } else {
+ const unsigned int carries = (unsigned int) uu.s.high <<
bm;
+
+ w.s.high = (unsigned int) uu.s.high >> b;
+ w.s.low = ((unsigned int) uu.s.low >> b) | carries;
+ }
+
+ return w.ll;
+}
+EXPORT_SYMBOL(__lshrdi3);
diff --git a/arch/score/lib/string.S b/arch/score/lib/string.S
new file mode 100644
index 0000000..ff9df3b
--- /dev/null
+++ b/arch/score/lib/string.S
@@ -0,0 +1,203 @@
+/*
+ * arch/score/lib/string.S
+ *
+ * Score Processor version.
+ *
+ * Copyright (C) 2009 Sunplus Core Technology Co., Ltd.
+ * Chen Liqin <liqin.chen@...plusct.com>
+ * Lennox Wu <lennox.wu@...plusct.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 <asm-generic/errno.h>
+
+ .text
+ .globl __strncpy_from_user
+ .align 2
+__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
+
+ .globl __strnlen_user
+ .align 2
+__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
+
+ .globl __strlen_user
+ .align 2
+__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
+
+ .globl __copy_tofrom_user
+ .align 2
+__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
+
+ .globl __clear_user
+ .align 2
+__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
+ .globl __put_user_unknown
+__put_user_unknown:
+ .set volatile
+ ldi r4, -EFAULT
+ br r3
+
+ .align 2
+ .globl __get_user_unknown
+ .set volatile
+__get_user_unknown:
+ ldi r5, 0
+ ldi r4, -EFAULT
+ br r3
diff --git a/arch/score/lib/ucmpdi2.c b/arch/score/lib/ucmpdi2.c
new file mode 100644
index 0000000..b15241e
--- /dev/null
+++ b/arch/score/lib/ucmpdi2.c
@@ -0,0 +1,38 @@
+/*
+ * arch/score/lib/ucmpdi2.c
+ *
+ * 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/module.h>
+#include "libgcc.h"
+
+word_type __ucmpdi2(unsigned long long a, unsigned long long b)
+{
+ const DWunion au = {.ll = a};
+ const DWunion bu = {.ll = b};
+
+ if ((unsigned int) au.s.high < (unsigned int) bu.s.high)
+ return 0;
+ else if ((unsigned int) au.s.high > (unsigned int) bu.s.high)
+ return 2;
+ if ((unsigned int) au.s.low < (unsigned int) bu.s.low)
+ return 0;
+ else if ((unsigned int) au.s.low > (unsigned int) bu.s.low)
+ return 2;
+ return 1;
+}
+EXPORT_SYMBOL(__ucmpdi2);
--
1.6.2
--
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