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-rw-r--r--arch/arm/lib/Makefile22
-rw-r--r--arch/arm/lib/ashldi3.S48
-rw-r--r--arch/arm/lib/ashldi3.c56
-rw-r--r--arch/arm/lib/ashrdi3.S48
-rw-r--r--arch/arm/lib/ashrdi3.c57
-rw-r--r--arch/arm/lib/bitops.h2
-rw-r--r--arch/arm/lib/clear_user.S52
-rw-r--r--arch/arm/lib/copy_from_user.S101
-rw-r--r--arch/arm/lib/copy_template.S255
-rw-r--r--arch/arm/lib/copy_to_user.S101
-rw-r--r--arch/arm/lib/gcclib.h22
-rw-r--r--arch/arm/lib/lshrdi3.S48
-rw-r--r--arch/arm/lib/lshrdi3.c56
-rw-r--r--arch/arm/lib/memcpy.S410
-rw-r--r--arch/arm/lib/memmove.S206
-rw-r--r--arch/arm/lib/muldi3.S44
-rw-r--r--arch/arm/lib/muldi3.c72
-rw-r--r--arch/arm/lib/uaccess.S170
-rw-r--r--arch/arm/lib/ucmpdi2.S35
-rw-r--r--arch/arm/lib/ucmpdi2.c49
20 files changed, 1011 insertions, 843 deletions
diff --git a/arch/arm/lib/Makefile b/arch/arm/lib/Makefile
index 71e5b99e519..391f3ab3ff3 100644
--- a/arch/arm/lib/Makefile
+++ b/arch/arm/lib/Makefile
@@ -7,13 +7,27 @@
lib-y := backtrace.o changebit.o csumipv6.o csumpartial.o \
csumpartialcopy.o csumpartialcopyuser.o clearbit.o \
copy_page.o delay.o findbit.o memchr.o memcpy.o \
- memset.o memzero.o setbit.o strncpy_from_user.o \
- strnlen_user.o strchr.o strrchr.o testchangebit.o \
- testclearbit.o testsetbit.o uaccess.o getuser.o \
- putuser.o ashldi3.o ashrdi3.o lshrdi3.o muldi3.o \
+ memmove.o memset.o memzero.o setbit.o \
+ strncpy_from_user.o strnlen_user.o \
+ strchr.o strrchr.o \
+ testchangebit.o testclearbit.o testsetbit.o \
+ getuser.o putuser.o clear_user.o \
+ ashldi3.o ashrdi3.o lshrdi3.o muldi3.o \
ucmpdi2.o lib1funcs.o div64.o sha1.o \
io-readsb.o io-writesb.o io-readsl.o io-writesl.o
+# the code in uaccess.S is not preemption safe and
+# probably faster on ARMv3 only
+ifeq ($CONFIG_PREEMPT,y)
+ lib-y += copy_from_user.o copy_to_user.o
+else
+ifneq ($(CONFIG_CPU_32v3),y)
+ lib-y += copy_from_user.o copy_to_user.o
+else
+ lib-y += uaccess.o
+endif
+endif
+
ifeq ($(CONFIG_CPU_32v3),y)
lib-y += io-readsw-armv3.o io-writesw-armv3.o
else
diff --git a/arch/arm/lib/ashldi3.S b/arch/arm/lib/ashldi3.S
new file mode 100644
index 00000000000..561e20717b3
--- /dev/null
+++ b/arch/arm/lib/ashldi3.S
@@ -0,0 +1,48 @@
+/* Copyright 1995, 1996, 1998, 1999, 2000, 2003, 2004, 2005
+ Free Software Foundation, Inc.
+
+This file 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, or (at your option) any
+later version.
+
+In addition to the permissions in the GNU General Public License, the
+Free Software Foundation gives you unlimited permission to link the
+compiled version of this file into combinations with other programs,
+and to distribute those combinations without any restriction coming
+from the use of this file. (The General Public License restrictions
+do apply in other respects; for example, they cover modification of
+the file, and distribution when not linked into a combine
+executable.)
+
+This file 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; see the file COPYING. If not, write to
+the Free Software Foundation, 51 Franklin Street, Fifth Floor,
+Boston, MA 02110-1301, USA. */
+
+
+#include <linux/linkage.h>
+
+#ifdef __ARMEB__
+#define al r1
+#define ah r0
+#else
+#define al r0
+#define ah r1
+#endif
+
+ENTRY(__ashldi3)
+
+ subs r3, r2, #32
+ rsb ip, r2, #32
+ movmi ah, ah, lsl r2
+ movpl ah, al, lsl r3
+ orrmi ah, ah, al, lsr ip
+ mov al, al, lsl r2
+ mov pc, lr
+
diff --git a/arch/arm/lib/ashldi3.c b/arch/arm/lib/ashldi3.c
deleted file mode 100644
index b62875cfd8f..00000000000
--- a/arch/arm/lib/ashldi3.c
+++ /dev/null
@@ -1,56 +0,0 @@
-/* More subroutines needed by GCC output code on some machines. */
-/* Compile this one with gcc. */
-/* Copyright (C) 1989, 92-98, 1999 Free Software Foundation, Inc.
-
-This file is part of GNU CC.
-
-GNU CC 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, or (at your option)
-any later version.
-
-GNU CC 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 GNU CC; see the file COPYING. If not, write to
-the Free Software Foundation, 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA. */
-
-/* As a special exception, if you link this library with other files,
- some of which are compiled with GCC, to produce an executable,
- this library does not by itself cause the resulting executable
- to be covered by the GNU General Public License.
- This exception does not however invalidate any other reasons why
- the executable file might be covered by the GNU General Public License.
- */
-/* support functions required by the kernel. based on code from gcc-2.95.3 */
-/* I Molton 29/07/01 */
-
-#include "gcclib.h"
-
-s64 __ashldi3(s64 u, int b)
-{
- DIunion w;
- int bm;
- DIunion uu;
-
- if (b == 0)
- return u;
-
- uu.ll = u;
-
- bm = (sizeof(s32) * BITS_PER_UNIT) - b;
- if (bm <= 0) {
- w.s.low = 0;
- w.s.high = (u32) uu.s.low << -bm;
- } else {
- u32 carries = (u32) uu.s.low >> bm;
- w.s.low = (u32) uu.s.low << b;
- w.s.high = ((u32) uu.s.high << b) | carries;
- }
-
- return w.ll;
-}
diff --git a/arch/arm/lib/ashrdi3.S b/arch/arm/lib/ashrdi3.S
new file mode 100644
index 00000000000..86fb2a90c30
--- /dev/null
+++ b/arch/arm/lib/ashrdi3.S
@@ -0,0 +1,48 @@
+/* Copyright 1995, 1996, 1998, 1999, 2000, 2003, 2004, 2005
+ Free Software Foundation, Inc.
+
+This file 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, or (at your option) any
+later version.
+
+In addition to the permissions in the GNU General Public License, the
+Free Software Foundation gives you unlimited permission to link the
+compiled version of this file into combinations with other programs,
+and to distribute those combinations without any restriction coming
+from the use of this file. (The General Public License restrictions
+do apply in other respects; for example, they cover modification of
+the file, and distribution when not linked into a combine
+executable.)
+
+This file 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; see the file COPYING. If not, write to
+the Free Software Foundation, 51 Franklin Street, Fifth Floor,
+Boston, MA 02110-1301, USA. */
+
+
+#include <linux/linkage.h>
+
+#ifdef __ARMEB__
+#define al r1
+#define ah r0
+#else
+#define al r0
+#define ah r1
+#endif
+
+ENTRY(__ashrdi3)
+
+ subs r3, r2, #32
+ rsb ip, r2, #32
+ movmi al, al, lsr r2
+ movpl al, ah, asr r3
+ orrmi al, al, ah, lsl ip
+ mov ah, ah, asr r2
+ mov pc, lr
+
diff --git a/arch/arm/lib/ashrdi3.c b/arch/arm/lib/ashrdi3.c
deleted file mode 100644
index 9a8600a7543..00000000000
--- a/arch/arm/lib/ashrdi3.c
+++ /dev/null
@@ -1,57 +0,0 @@
-/* More subroutines needed by GCC output code on some machines. */
-/* Compile this one with gcc. */
-/* Copyright (C) 1989, 92-98, 1999 Free Software Foundation, Inc.
-
-This file is part of GNU CC.
-
-GNU CC 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, or (at your option)
-any later version.
-
-GNU CC 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 GNU CC; see the file COPYING. If not, write to
-the Free Software Foundation, 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA. */
-
-/* As a special exception, if you link this library with other files,
- some of which are compiled with GCC, to produce an executable,
- this library does not by itself cause the resulting executable
- to be covered by the GNU General Public License.
- This exception does not however invalidate any other reasons why
- the executable file might be covered by the GNU General Public License.
- */
-/* support functions required by the kernel. based on code from gcc-2.95.3 */
-/* I Molton 29/07/01 */
-
-#include "gcclib.h"
-
-s64 __ashrdi3(s64 u, int b)
-{
- DIunion w;
- int bm;
- DIunion uu;
-
- if (b == 0)
- return u;
-
- uu.ll = u;
-
- bm = (sizeof(s32) * BITS_PER_UNIT) - b;
- if (bm <= 0) {
- /* w.s.high = 1..1 or 0..0 */
- w.s.high = uu.s.high >> (sizeof(s32) * BITS_PER_UNIT - 1);
- w.s.low = uu.s.high >> -bm;
- } else {
- u32 carries = (u32) uu.s.high << bm;
- w.s.high = uu.s.high >> b;
- w.s.low = ((u32) uu.s.low >> b) | carries;
- }
-
- return w.ll;
-}
diff --git a/arch/arm/lib/bitops.h b/arch/arm/lib/bitops.h
index 64a988c1ad4..f35d91fbe11 100644
--- a/arch/arm/lib/bitops.h
+++ b/arch/arm/lib/bitops.h
@@ -1,6 +1,6 @@
#include <linux/config.h>
-#if __LINUX_ARM_ARCH__ >= 6 && defined(CONFIG_CPU_MPCORE)
+#if __LINUX_ARM_ARCH__ >= 6 && defined(CONFIG_CPU_32v6K)
.macro bitop, instr
mov r2, #1
and r3, r0, #7 @ Get bit offset
diff --git a/arch/arm/lib/clear_user.S b/arch/arm/lib/clear_user.S
new file mode 100644
index 00000000000..7ff9f831b3f
--- /dev/null
+++ b/arch/arm/lib/clear_user.S
@@ -0,0 +1,52 @@
+/*
+ * linux/arch/arm/lib/clear_user.S
+ *
+ * Copyright (C) 1995, 1996,1997,1998 Russell King
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/linkage.h>
+#include <asm/assembler.h>
+
+ .text
+
+/* Prototype: int __arch_clear_user(void *addr, size_t sz)
+ * Purpose : clear some user memory
+ * Params : addr - user memory address to clear
+ * : sz - number of bytes to clear
+ * Returns : number of bytes NOT cleared
+ */
+ENTRY(__arch_clear_user)
+ stmfd sp!, {r1, lr}
+ mov r2, #0
+ cmp r1, #4
+ blt 2f
+ ands ip, r0, #3
+ beq 1f
+ cmp ip, #2
+USER( strbt r2, [r0], #1)
+USER( strlebt r2, [r0], #1)
+USER( strltbt r2, [r0], #1)
+ rsb ip, ip, #4
+ sub r1, r1, ip @ 7 6 5 4 3 2 1
+1: subs r1, r1, #8 @ -1 -2 -3 -4 -5 -6 -7
+USER( strplt r2, [r0], #4)
+USER( strplt r2, [r0], #4)
+ bpl 1b
+ adds r1, r1, #4 @ 3 2 1 0 -1 -2 -3
+USER( strplt r2, [r0], #4)
+2: tst r1, #2 @ 1x 1x 0x 0x 1x 1x 0x
+USER( strnebt r2, [r0], #1)
+USER( strnebt r2, [r0], #1)
+ tst r1, #1 @ x1 x0 x1 x0 x1 x0 x1
+USER( strnebt r2, [r0], #1)
+ mov r0, #0
+ LOADREGS(fd,sp!, {r1, pc})
+
+ .section .fixup,"ax"
+ .align 0
+9001: LOADREGS(fd,sp!, {r0, pc})
+ .previous
+
diff --git a/arch/arm/lib/copy_from_user.S b/arch/arm/lib/copy_from_user.S
new file mode 100644
index 00000000000..7497393a0e8
--- /dev/null
+++ b/arch/arm/lib/copy_from_user.S
@@ -0,0 +1,101 @@
+/*
+ * linux/arch/arm/lib/copy_from_user.S
+ *
+ * Author: Nicolas Pitre
+ * Created: Sep 29, 2005
+ * Copyright: MontaVista Software, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/linkage.h>
+#include <asm/assembler.h>
+
+/*
+ * Prototype:
+ *
+ * size_t __arch_copy_from_user(void *to, const void *from, size_t n)
+ *
+ * Purpose:
+ *
+ * copy a block to kernel memory from user memory
+ *
+ * Params:
+ *
+ * to = kernel memory
+ * from = user memory
+ * n = number of bytes to copy
+ *
+ * Return value:
+ *
+ * Number of bytes NOT copied.
+ */
+
+ .macro ldr1w ptr reg abort
+100: ldrt \reg, [\ptr], #4
+ .section __ex_table, "a"
+ .long 100b, \abort
+ .previous
+ .endm
+
+ .macro ldr4w ptr reg1 reg2 reg3 reg4 abort
+ ldr1w \ptr, \reg1, \abort
+ ldr1w \ptr, \reg2, \abort
+ ldr1w \ptr, \reg3, \abort
+ ldr1w \ptr, \reg4, \abort
+ .endm
+
+ .macro ldr8w ptr reg1 reg2 reg3 reg4 reg5 reg6 reg7 reg8 abort
+ ldr4w \ptr, \reg1, \reg2, \reg3, \reg4, \abort
+ ldr4w \ptr, \reg5, \reg6, \reg7, \reg8, \abort
+ .endm
+
+ .macro ldr1b ptr reg cond=al abort
+100: ldr\cond\()bt \reg, [\ptr], #1
+ .section __ex_table, "a"
+ .long 100b, \abort
+ .previous
+ .endm
+
+ .macro str1w ptr reg abort
+ str \reg, [\ptr], #4
+ .endm
+
+ .macro str8w ptr reg1 reg2 reg3 reg4 reg5 reg6 reg7 reg8 abort
+ stmia \ptr!, {\reg1, \reg2, \reg3, \reg4, \reg5, \reg6, \reg7, \reg8}
+ .endm
+
+ .macro str1b ptr reg cond=al abort
+ str\cond\()b \reg, [\ptr], #1
+ .endm
+
+ .macro enter reg1 reg2
+ mov r3, #0
+ stmdb sp!, {r0, r2, r3, \reg1, \reg2}
+ .endm
+
+ .macro exit reg1 reg2
+ add sp, sp, #8
+ ldmfd sp!, {r0, \reg1, \reg2}
+ .endm
+
+ .text
+
+ENTRY(__arch_copy_from_user)
+
+#include "copy_template.S"
+
+ .section .fixup,"ax"
+ .align 0
+ copy_abort_preamble
+ ldmfd sp!, {r1, r2}
+ sub r3, r0, r1
+ rsb r1, r3, r2
+ str r1, [sp]
+ bl __memzero
+ ldr r0, [sp], #4
+ copy_abort_end
+ .previous
+
diff --git a/arch/arm/lib/copy_template.S b/arch/arm/lib/copy_template.S
new file mode 100644
index 00000000000..838e435e492
--- /dev/null
+++ b/arch/arm/lib/copy_template.S
@@ -0,0 +1,255 @@
+/*
+ * linux/arch/arm/lib/copy_template.s
+ *
+ * Code template for optimized memory copy functions
+ *
+ * Author: Nicolas Pitre
+ * Created: Sep 28, 2005
+ * Copyright: MontaVista Software, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+/*
+ * This can be used to enable code to cacheline align the source pointer.
+ * Experiments on tested architectures (StrongARM and XScale) didn't show
+ * this a worthwhile thing to do. That might be different in the future.
+ */
+//#define CALGN(code...) code
+#define CALGN(code...)
+
+/*
+ * Theory of operation
+ * -------------------
+ *
+ * This file provides the core code for a forward memory copy used in
+ * the implementation of memcopy(), copy_to_user() and copy_from_user().
+ *
+ * The including file must define the following accessor macros
+ * according to the need of the given function:
+ *
+ * ldr1w ptr reg abort
+ *
+ * This loads one word from 'ptr', stores it in 'reg' and increments
+ * 'ptr' to the next word. The 'abort' argument is used for fixup tables.
+ *
+ * ldr4w ptr reg1 reg2 reg3 reg4 abort
+ * ldr8w ptr, reg1 reg2 reg3 reg4 reg5 reg6 reg7 reg8 abort
+ *
+ * This loads four or eight words starting from 'ptr', stores them
+ * in provided registers and increments 'ptr' past those words.
+ * The'abort' argument is used for fixup tables.
+ *
+ * ldr1b ptr reg cond abort
+ *
+ * Similar to ldr1w, but it loads a byte and increments 'ptr' one byte.
+ * It also must apply the condition code if provided, otherwise the
+ * "al" condition is assumed by default.
+ *
+ * str1w ptr reg abort
+ * str8w ptr reg1 reg2 reg3 reg4 reg5 reg6 reg7 reg8 abort
+ * str1b ptr reg cond abort
+ *
+ * Same as their ldr* counterparts, but data is stored to 'ptr' location
+ * rather than being loaded.
+ *
+ * enter reg1 reg2
+ *
+ * Preserve the provided registers on the stack plus any additional
+ * data as needed by the implementation including this code. Called
+ * upon code entry.
+ *
+ * exit reg1 reg2
+ *
+ * Restore registers with the values previously saved with the
+ * 'preserv' macro. Called upon code termination.
+ */
+
+
+ enter r4, lr
+
+ subs r2, r2, #4
+ blt 8f
+ ands ip, r0, #3
+ PLD( pld [r1, #0] )
+ bne 9f
+ ands ip, r1, #3
+ bne 10f
+
+1: subs r2, r2, #(28)
+ stmfd sp!, {r5 - r8}
+ blt 5f
+
+ CALGN( ands ip, r1, #31 )
+ CALGN( rsb r3, ip, #32 )
+ CALGN( sbcnes r4, r3, r2 ) @ C is always set here
+ CALGN( bcs 2f )
+ CALGN( adr r4, 6f )
+ CALGN( subs r2, r2, r3 ) @ C gets set
+ CALGN( add pc, r4, ip )
+
+ PLD( pld [r1, #0] )
+2: PLD( subs r2, r2, #96 )
+ PLD( pld [r1, #28] )
+ PLD( blt 4f )
+ PLD( pld [r1, #60] )
+ PLD( pld [r1, #92] )
+
+3: PLD( pld [r1, #124] )
+4: ldr8w r1, r3, r4, r5, r6, r7, r8, ip, lr, abort=20f
+ subs r2, r2, #32
+ str8w r0, r3, r4, r5, r6, r7, r8, ip, lr, abort=20f
+ bge 3b
+ PLD( cmn r2, #96 )
+ PLD( bge 4b )
+
+5: ands ip, r2, #28
+ rsb ip, ip, #32
+ addne pc, pc, ip @ C is always clear here
+ b 7f
+6: nop
+ ldr1w r1, r3, abort=20f
+ ldr1w r1, r4, abort=20f
+ ldr1w r1, r5, abort=20f
+ ldr1w r1, r6, abort=20f
+ ldr1w r1, r7, abort=20f
+ ldr1w r1, r8, abort=20f
+ ldr1w r1, lr, abort=20f
+
+ add pc, pc, ip
+ nop
+ nop
+ str1w r0, r3, abort=20f
+ str1w r0, r4, abort=20f
+ str1w r0, r5, abort=20f
+ str1w r0, r6, abort=20f
+ str1w r0, r7, abort=20f
+ str1w r0, r8, abort=20f
+ str1w r0, lr, abort=20f
+
+ CALGN( bcs 2b )
+
+7: ldmfd sp!, {r5 - r8}
+
+8: movs r2, r2, lsl #31
+ ldr1b r1, r3, ne, abort=21f
+ ldr1b r1, r4, cs, abort=21f
+ ldr1b r1, ip, cs, abort=21f
+ str1b r0, r3, ne, abort=21f
+ str1b r0, r4, cs, abort=21f
+ str1b r0, ip, cs, abort=21f
+
+ exit r4, pc
+
+9: rsb ip, ip, #4
+ cmp ip, #2
+ ldr1b r1, r3, gt, abort=21f
+ ldr1b r1, r4, ge, abort=21f
+ ldr1b r1, lr, abort=21f
+ str1b r0, r3, gt, abort=21f
+ str1b r0, r4, ge, abort=21f
+ subs r2, r2, ip
+ str1b r0, lr, abort=21f
+ blt 8b
+ ands ip, r1, #3
+ beq 1b
+
+10: bic r1, r1, #3
+ cmp ip, #2
+ ldr1w r1, lr, abort=21f
+ beq 17f
+ bgt 18f
+
+
+ .macro forward_copy_shift pull push
+
+ subs r2, r2, #28
+ blt 14f
+
+ CALGN( ands ip, r1, #31 )
+ CALGN( rsb ip, ip, #32 )
+ CALGN( sbcnes r4, ip, r2 ) @ C is always set here
+ CALGN( subcc r2, r2, ip )
+ CALGN( bcc 15f )
+
+11: stmfd sp!, {r5 - r9}
+
+ PLD( pld [r1, #0] )
+ PLD( subs r2, r2, #96 )
+ PLD( pld [r1, #28] )
+ PLD( blt 13f )
+ PLD( pld [r1, #60] )
+ PLD( pld [r1, #92] )
+
+12: PLD( pld [r1, #124] )
+13: ldr4w r1, r4, r5, r6, r7, abort=19f
+ mov r3, lr, pull #\pull
+ subs r2, r2, #32
+ ldr4w r1, r8, r9, ip, lr, abort=19f
+ orr r3, r3, r4, push #\push
+ mov r4, r4, pull #\pull
+ orr r4, r4, r5, push #\push
+ mov r5, r5, pull #\pull
+ orr r5, r5, r6, push #\push
+ mov r6, r6, pull #\pull
+ orr r6, r6, r7, push #\push
+ mov r7, r7, pull #\pull
+ orr r7, r7, r8, push #\push
+ mov r8, r8, pull #\pull
+ orr r8, r8, r9, push #\push
+ mov r9, r9, pull #\pull
+ orr r9, r9, ip, push #\push
+ mov ip, ip, pull #\pull
+ orr ip, ip, lr, push #\push
+ str8w r0, r3, r4, r5, r6, r7, r8, r9, ip, , abort=19f
+ bge 12b
+ PLD( cmn r2, #96 )
+ PLD( bge 13b )
+
+ ldmfd sp!, {r5 - r9}
+
+14: ands ip, r2, #28
+ beq 16f
+
+15: mov r3, lr, pull #\pull
+ ldr1w r1, lr, abort=21f
+ subs ip, ip, #4
+ orr r3, r3, lr, push #\push
+ str1w r0, r3, abort=21f
+ bgt 15b
+ CALGN( cmp r2, #0 )
+ CALGN( bge 11b )
+
+16: sub r1, r1, #(\push / 8)
+ b 8b
+
+ .endm
+
+
+ forward_copy_shift pull=8 push=24
+
+17: forward_copy_shift pull=16 push=16
+
+18: forward_copy_shift pull=24 push=8
+
+
+/*
+ * Abort preanble and completion macros.
+ * If a fixup handler is required then those macros must surround it.
+ * It is assumed that the fixup code will handle the private part of
+ * the exit macro.
+ */
+
+ .macro copy_abort_preamble
+19: ldmfd sp!, {r5 - r9}
+ b 21f
+20: ldmfd sp!, {r5 - r8}
+21:
+ .endm
+
+ .macro copy_abort_end
+ ldmfd sp!, {r4, pc}
+ .endm
+
diff --git a/arch/arm/lib/copy_to_user.S b/arch/arm/lib/copy_to_user.S
new file mode 100644
index 00000000000..4a6d8ea1402
--- /dev/null
+++ b/arch/arm/lib/copy_to_user.S
@@ -0,0 +1,101 @@
+/*
+ * linux/arch/arm/lib/copy_to_user.S
+ *
+ * Author: Nicolas Pitre
+ * Created: Sep 29, 2005
+ * Copyright: MontaVista Software, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/linkage.h>
+#include <asm/assembler.h>
+
+/*
+ * Prototype:
+ *
+ * size_t __arch_copy_to_user(void *to, const void *from, size_t n)
+ *
+ * Purpose:
+ *
+ * copy a block to user memory from kernel memory
+ *
+ * Params:
+ *
+ * to = user memory
+ * from = kernel memory
+ * n = number of bytes to copy
+ *
+ * Return value:
+ *
+ * Number of bytes NOT copied.
+ */
+
+ .macro ldr1w ptr reg abort
+ ldr \reg, [\ptr], #4
+ .endm
+
+ .macro ldr4w ptr reg1 reg2 reg3 reg4 abort
+ ldmia \ptr!, {\reg1, \reg2, \reg3, \reg4}
+ .endm
+
+ .macro ldr8w ptr reg1 reg2 reg3 reg4 reg5 reg6 reg7 reg8 abort
+ ldmia \ptr!, {\reg1, \reg2, \reg3, \reg4, \reg5, \reg6, \reg7, \reg8}
+ .endm
+
+ .macro ldr1b ptr reg cond=al abort
+ ldr\cond\()b \reg, [\ptr], #1
+ .endm
+
+ .macro str1w ptr reg abort
+100: strt \reg, [\ptr], #4
+ .section __ex_table, "a"
+ .long 100b, \abort
+ .previous
+ .endm
+
+ .macro str8w ptr reg1 reg2 reg3 reg4 reg5 reg6 reg7 reg8 abort
+ str1w \ptr, \reg1, \abort
+ str1w \ptr, \reg2, \abort
+ str1w \ptr, \reg3, \abort
+ str1w \ptr, \reg4, \abort
+ str1w \ptr, \reg5, \abort
+ str1w \ptr, \reg6, \abort
+ str1w \ptr, \reg7, \abort
+ str1w \ptr, \reg8, \abort
+ .endm
+
+ .macro str1b ptr reg cond=al abort
+100: str\cond\()bt \reg, [\ptr], #1
+ .section __ex_table, "a"
+ .long 100b, \abort
+ .previous
+ .endm
+
+ .macro enter reg1 reg2
+ mov r3, #0
+ stmdb sp!, {r0, r2, r3, \reg1, \reg2}
+ .endm
+
+ .macro exit reg1 reg2
+ add sp, sp, #8
+ ldmfd sp!, {r0, \reg1, \reg2}
+ .endm
+
+ .text
+
+ENTRY(__arch_copy_to_user)
+
+#include "copy_template.S"
+
+ .section .fixup,"ax"
+ .align 0
+ copy_abort_preamble
+ ldmfd sp!, {r1, r2, r3}
+ sub r0, r0, r1
+ rsb r0, r0, r2
+ copy_abort_end
+ .previous
+
diff --git a/arch/arm/lib/gcclib.h b/arch/arm/lib/gcclib.h
deleted file mode 100644
index 8b6dcc656de..00000000000
--- a/arch/arm/lib/gcclib.h
+++ /dev/null
@@ -1,22 +0,0 @@
-/* gcclib.h -- definitions for various functions 'borrowed' from gcc-2.95.3 */
-/* I Molton 29/07/01 */
-
-#include <linux/types.h>
-
-#define BITS_PER_UNIT 8
-#define SI_TYPE_SIZE (sizeof(s32) * BITS_PER_UNIT)
-
-#ifdef __ARMEB__
-struct DIstruct {
- s32 high, low;
-};
-#else
-struct DIstruct {
- s32 low, high;
-};
-#endif
-
-typedef union {
- struct DIstruct s;
- s64 ll;
-} DIunion;
diff --git a/arch/arm/lib/lshrdi3.S b/arch/arm/lib/lshrdi3.S
new file mode 100644
index 00000000000..46c2ed19ec9
--- /dev/null
+++ b/arch/arm/lib/lshrdi3.S
@@ -0,0 +1,48 @@
+/* Copyright 1995, 1996, 1998, 1999, 2000, 2003, 2004, 2005
+ Free Software Foundation, Inc.
+
+This file 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, or (at your option) any
+later version.
+
+In addition to the permissions in the GNU General Public License, the
+Free Software Foundation gives you unlimited permission to link the
+compiled version of this file into combinations with other programs,
+and to distribute those combinations without any restriction coming
+from the use of this file. (The General Public License restrictions
+do apply in other respects; for example, they cover modification of
+the file, and distribution when not linked into a combine
+executable.)
+
+This file 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; see the file COPYING. If not, write to
+the Free Software Foundation, 51 Franklin Street, Fifth Floor,
+Boston, MA 02110-1301, USA. */
+
+
+#include <linux/linkage.h>
+
+#ifdef __ARMEB__
+#define al r1
+#define ah r0
+#else
+#define al r0
+#define ah r1
+#endif
+
+ENTRY(__lshrdi3)
+
+ subs r3, r2, #32
+ rsb ip, r2, #32
+ movmi al, al, lsr r2
+ movpl al, ah, lsr r3
+ orrmi al, al, ah, lsl ip
+ mov ah, ah, lsr r2
+ mov pc, lr
+
diff --git a/arch/arm/lib/lshrdi3.c b/arch/arm/lib/lshrdi3.c
deleted file mode 100644
index 3681f49d2b6..00000000000
--- a/arch/arm/lib/lshrdi3.c
+++ /dev/null
@@ -1,56 +0,0 @@
-/* More subroutines needed by GCC output code on some machines. */
-/* Compile this one with gcc. */
-/* Copyright (C) 1989, 92-98, 1999 Free Software Foundation, Inc.
-
-This file is part of GNU CC.
-
-GNU CC 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, or (at your option)
-any later version.
-
-GNU CC 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 GNU CC; see the file COPYING. If not, write to
-the Free Software Foundation, 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA. */
-
-/* As a special exception, if you link this library with other files,
- some of which are compiled with GCC, to produce an executable,
- this library does not by itself cause the resulting executable
- to be covered by the GNU General Public License.
- This exception does not however invalidate any other reasons why
- the executable file might be covered by the GNU General Public License.
- */
-/* support functions required by the kernel. based on code from gcc-2.95.3 */
-/* I Molton 29/07/01 */
-
-#include "gcclib.h"
-
-s64 __lshrdi3(s64 u, int b)
-{
- DIunion w;
- int bm;
- DIunion uu;
-
- if (b == 0)
- return u;
-
- uu.ll = u;
-
- bm = (sizeof(s32) * BITS_PER_UNIT) - b;
- if (bm <= 0) {
- w.s.high = 0;
- w.s.low = (u32) uu.s.high >> -bm;
- } else {
- u32 carries = (u32) uu.s.high << bm;
- w.s.high = (u32) uu.s.high >> b;
- w.s.low = ((u32) uu.s.low >> b) | carries;
- }
-
- return w.ll;
-}
diff --git a/arch/arm/lib/memcpy.S b/arch/arm/lib/memcpy.S
index f5a593ceb8c..7e71d6708a8 100644
--- a/arch/arm/lib/memcpy.S
+++ b/arch/arm/lib/memcpy.S
@@ -1,393 +1,59 @@
/*
* linux/arch/arm/lib/memcpy.S
*
- * Copyright (C) 1995-1999 Russell King
+ * Author: Nicolas Pitre
+ * Created: Sep 28, 2005
+ * Copyright: MontaVista Software, Inc.
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * ASM optimised string functions
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
*/
+
#include <linux/linkage.h>
#include <asm/assembler.h>
- .text
-
-#define ENTER \
- mov ip,sp ;\
- stmfd sp!,{r0,r4-r9,fp,ip,lr,pc} ;\
- sub fp,ip,#4
-
-#define EXIT \
- LOADREGS(ea, fp, {r0, r4 - r9, fp, sp, pc})
-
-#define EXITEQ \
- LOADREGS(eqea, fp, {r0, r4 - r9, fp, sp, pc})
-
-/*
- * Prototype: void memcpy(void *to,const void *from,unsigned long n);
- */
-ENTRY(memcpy)
-ENTRY(memmove)
- ENTER
- cmp r1, r0
- bcc 23f
- subs r2, r2, #4
- blt 6f
- PLD( pld [r1, #0] )
- ands ip, r0, #3
- bne 7f
- ands ip, r1, #3
- bne 8f
+ .macro ldr1w ptr reg abort
+ ldr \reg, [\ptr], #4
+ .endm
-1: subs r2, r2, #8
- blt 5f
- subs r2, r2, #20
- blt 4f
- PLD( pld [r1, #28] )
- PLD( subs r2, r2, #64 )
- PLD( blt 3f )
-2: PLD( pld [r1, #60] )
- PLD( pld [r1, #92] )
- ldmia r1!, {r3 - r9, ip}
- subs r2, r2, #32
- stmgeia r0!, {r3 - r9, ip}
- ldmgeia r1!, {r3 - r9, ip}
- subges r2, r2, #32
- stmia r0!, {r3 - r9, ip}
- bge 2b
-3: PLD( ldmia r1!, {r3 - r9, ip} )
- PLD( adds r2, r2, #32 )
- PLD( stmgeia r0!, {r3 - r9, ip} )
- PLD( ldmgeia r1!, {r3 - r9, ip} )
- PLD( subges r2, r2, #32 )
- PLD( stmia r0!, {r3 - r9, ip} )
-4: cmn r2, #16
- ldmgeia r1!, {r3 - r6}
- subge r2, r2, #16
- stmgeia r0!, {r3 - r6}
- adds r2, r2, #20
- ldmgeia r1!, {r3 - r5}
- subge r2, r2, #12
- stmgeia r0!, {r3 - r5}
-5: adds r2, r2, #8
- blt 6f
- subs r2, r2, #4
- ldrlt r3, [r1], #4
- ldmgeia r1!, {r4, r5}
- subge r2, r2, #4
- strlt r3, [r0], #4
- stmgeia r0!, {r4, r5}
+ .macro ldr4w ptr reg1 reg2 reg3 reg4 abort
+ ldmia \ptr!, {\reg1, \reg2, \reg3, \reg4}
+ .endm
-6: adds r2, r2, #4
- EXITEQ
- cmp r2, #2
- ldrb r3, [r1], #1
- ldrgeb r4, [r1], #1
- ldrgtb r5, [r1], #1
- strb r3, [r0], #1
- strgeb r4, [r0], #1
- strgtb r5, [r0], #1
- EXIT
+ .macro ldr8w ptr reg1 reg2 reg3 reg4 reg5 reg6 reg7 reg8 abort
+ ldmia \ptr!, {\reg1, \reg2, \reg3, \reg4, \reg5, \reg6, \reg7, \reg8}
+ .endm
-7: rsb ip, ip, #4
- cmp ip, #2
- ldrb r3, [r1], #1
- ldrgeb r4, [r1], #1
- ldrgtb r5, [r1], #1
- strb r3, [r0], #1
- strgeb r4, [r0], #1
- strgtb r5, [r0], #1
- subs r2, r2, ip
- blt 6b
- ands ip, r1, #3
- beq 1b
+ .macro ldr1b ptr reg cond=al abort
+ ldr\cond\()b \reg, [\ptr], #1
+ .endm
-8: bic r1, r1, #3
- ldr r7, [r1], #4
- cmp ip, #2
- bgt 18f
- beq 13f
- cmp r2, #12
- blt 11f
- PLD( pld [r1, #12] )
- sub r2, r2, #12
- PLD( subs r2, r2, #32 )
- PLD( blt 10f )
- PLD( pld [r1, #28] )
-9: PLD( pld [r1, #44] )
-10: mov r3, r7, pull #8
- ldmia r1!, {r4 - r7}
- subs r2, r2, #16
- orr r3, r3, r4, push #24
- mov r4, r4, pull #8
- orr r4, r4, r5, push #24
- mov r5, r5, pull #8
- orr r5, r5, r6, push #24
- mov r6, r6, pull #8
- orr r6, r6, r7, push #24
- stmia r0!, {r3 - r6}
- bge 9b
- PLD( cmn r2, #32 )
- PLD( bge 10b )
- PLD( add r2, r2, #32 )
- adds r2, r2, #12
- blt 12f
-11: mov r3, r7, pull #8
- ldr r7, [r1], #4
- subs r2, r2, #4
- orr r3, r3, r7, push #24
- str r3, [r0], #4
- bge 11b
-12: sub r1, r1, #3
- b 6b
+ .macro str1w ptr reg abort
+ str \reg, [\ptr], #4
+ .endm
-13: cmp r2, #12
- blt 16f
- PLD( pld [r1, #12] )
- sub r2, r2, #12
- PLD( subs r2, r2, #32 )
- PLD( blt 15f )
- PLD( pld [r1, #28] )
-14: PLD( pld [r1, #44] )
-15: mov r3, r7, pull #16
- ldmia r1!, {r4 - r7}
- subs r2, r2, #16
- orr r3, r3, r4, push #16
- mov r4, r4, pull #16
- orr r4, r4, r5, push #16
- mov r5, r5, pull #16
- orr r5, r5, r6, push #16
- mov r6, r6, pull #16
- orr r6, r6, r7, push #16
- stmia r0!, {r3 - r6}
- bge 14b
- PLD( cmn r2, #32 )
- PLD( bge 15b )
- PLD( add r2, r2, #32 )
- adds r2, r2, #12
- blt 17f
-16: mov r3, r7, pull #16
- ldr r7, [r1], #4
- subs r2, r2, #4
- orr r3, r3, r7, push #16
- str r3, [r0], #4
- bge 16b
-17: sub r1, r1, #2
- b 6b
+ .macro str8w ptr reg1 reg2 reg3 reg4 reg5 reg6 reg7 reg8 abort
+ stmia \ptr!, {\reg1, \reg2, \reg3, \reg4, \reg5, \reg6, \reg7, \reg8}
+ .endm
-18: cmp r2, #12
- blt 21f
- PLD( pld [r1, #12] )
- sub r2, r2, #12
- PLD( subs r2, r2, #32 )
- PLD( blt 20f )
- PLD( pld [r1, #28] )
-19: PLD( pld [r1, #44] )
-20: mov r3, r7, pull #24
- ldmia r1!, {r4 - r7}
- subs r2, r2, #16
- orr r3, r3, r4, push #8
- mov r4, r4, pull #24
- orr r4, r4, r5, push #8
- mov r5, r5, pull #24
- orr r5, r5, r6, push #8
- mov r6, r6, pull #24
- orr r6, r6, r7, push #8
- stmia r0!, {r3 - r6}
- bge 19b
- PLD( cmn r2, #32 )
- PLD( bge 20b )
- PLD( add r2, r2, #32 )
- adds r2, r2, #12
- blt 22f
-21: mov r3, r7, pull #24
- ldr r7, [r1], #4
- subs r2, r2, #4
- orr r3, r3, r7, push #8
- str r3, [r0], #4
- bge 21b
-22: sub r1, r1, #1
- b 6b
+ .macro str1b ptr reg cond=al abort
+ str\cond\()b \reg, [\ptr], #1
+ .endm
+ .macro enter reg1 reg2
+ stmdb sp!, {r0, \reg1, \reg2}
+ .endm
-23: add r1, r1, r2
- add r0, r0, r2
- subs r2, r2, #4
- blt 29f
- PLD( pld [r1, #-4] )
- ands ip, r0, #3
- bne 30f
- ands ip, r1, #3
- bne 31f
+ .macro exit reg1 reg2
+ ldmfd sp!, {r0, \reg1, \reg2}
+ .endm
-24: subs r2, r2, #8
- blt 28f
- subs r2, r2, #20
- blt 27f
- PLD( pld [r1, #-32] )
- PLD( subs r2, r2, #64 )
- PLD( blt 26f )
-25: PLD( pld [r1, #-64] )
- PLD( pld [r1, #-96] )
- ldmdb r1!, {r3 - r9, ip}
- subs r2, r2, #32
- stmgedb r0!, {r3 - r9, ip}
- ldmgedb r1!, {r3 - r9, ip}
- subges r2, r2, #32
- stmdb r0!, {r3 - r9, ip}
- bge 25b
-26: PLD( ldmdb r1!, {r3 - r9, ip} )
- PLD( adds r2, r2, #32 )
- PLD( stmgedb r0!, {r3 - r9, ip} )
- PLD( ldmgedb r1!, {r3 - r9, ip} )
- PLD( subges r2, r2, #32 )
- PLD( stmdb r0!, {r3 - r9, ip} )
-27: cmn r2, #16
- ldmgedb r1!, {r3 - r6}
- subge r2, r2, #16
- stmgedb r0!, {r3 - r6}
- adds r2, r2, #20
- ldmgedb r1!, {r3 - r5}
- subge r2, r2, #12
- stmgedb r0!, {r3 - r5}
-28: adds r2, r2, #8
- blt 29f
- subs r2, r2, #4
- ldrlt r3, [r1, #-4]!
- ldmgedb r1!, {r4, r5}
- subge r2, r2, #4
- strlt r3, [r0, #-4]!
- stmgedb r0!, {r4, r5}
+ .text
-29: adds r2, r2, #4
- EXITEQ
- cmp r2, #2
- ldrb r3, [r1, #-1]!
- ldrgeb r4, [r1, #-1]!
- ldrgtb r5, [r1, #-1]!
- strb r3, [r0, #-1]!
- strgeb r4, [r0, #-1]!
- strgtb r5, [r0, #-1]!
- EXIT
+/* Prototype: void *memcpy(void *dest, const void *src, size_t n); */
-30: cmp ip, #2
- ldrb r3, [r1, #-1]!
- ldrgeb r4, [r1, #-1]!
- ldrgtb r5, [r1, #-1]!
- strb r3, [r0, #-1]!
- strgeb r4, [r0, #-1]!
- strgtb r5, [r0, #-1]!
- subs r2, r2, ip
- blt 29b
- ands ip, r1, #3
- beq 24b
-
-31: bic r1, r1, #3
- ldr r3, [r1], #0
- cmp ip, #2
- blt 41f
- beq 36f
- cmp r2, #12
- blt 34f
- PLD( pld [r1, #-16] )
- sub r2, r2, #12
- PLD( subs r2, r2, #32 )
- PLD( blt 33f )
- PLD( pld [r1, #-32] )
-32: PLD( pld [r1, #-48] )
-33: mov r7, r3, push #8
- ldmdb r1!, {r3, r4, r5, r6}
- subs r2, r2, #16
- orr r7, r7, r6, pull #24
- mov r6, r6, push #8
- orr r6, r6, r5, pull #24
- mov r5, r5, push #8
- orr r5, r5, r4, pull #24
- mov r4, r4, push #8
- orr r4, r4, r3, pull #24
- stmdb r0!, {r4, r5, r6, r7}
- bge 32b
- PLD( cmn r2, #32 )
- PLD( bge 33b )
- PLD( add r2, r2, #32 )
- adds r2, r2, #12
- blt 35f
-34: mov ip, r3, push #8
- ldr r3, [r1, #-4]!
- subs r2, r2, #4
- orr ip, ip, r3, pull #24
- str ip, [r0, #-4]!
- bge 34b
-35: add r1, r1, #3
- b 29b
-
-36: cmp r2, #12
- blt 39f
- PLD( pld [r1, #-16] )
- sub r2, r2, #12
- PLD( subs r2, r2, #32 )
- PLD( blt 38f )
- PLD( pld [r1, #-32] )
-37: PLD( pld [r1, #-48] )
-38: mov r7, r3, push #16
- ldmdb r1!, {r3, r4, r5, r6}
- subs r2, r2, #16
- orr r7, r7, r6, pull #16
- mov r6, r6, push #16
- orr r6, r6, r5, pull #16
- mov r5, r5, push #16
- orr r5, r5, r4, pull #16
- mov r4, r4, push #16
- orr r4, r4, r3, pull #16
- stmdb r0!, {r4, r5, r6, r7}
- bge 37b
- PLD( cmn r2, #32 )
- PLD( bge 38b )
- PLD( add r2, r2, #32 )
- adds r2, r2, #12
- blt 40f
-39: mov ip, r3, push #16
- ldr r3, [r1, #-4]!
- subs r2, r2, #4
- orr ip, ip, r3, pull #16
- str ip, [r0, #-4]!
- bge 39b
-40: add r1, r1, #2
- b 29b
+ENTRY(memcpy)
-41: cmp r2, #12
- blt 44f
- PLD( pld [r1, #-16] )
- sub r2, r2, #12
- PLD( subs r2, r2, #32 )
- PLD( blt 43f )
- PLD( pld [r1, #-32] )
-42: PLD( pld [r1, #-48] )
-43: mov r7, r3, push #24
- ldmdb r1!, {r3, r4, r5, r6}
- subs r2, r2, #16
- orr r7, r7, r6, pull #8
- mov r6, r6, push #24
- orr r6, r6, r5, pull #8
- mov r5, r5, push #24
- orr r5, r5, r4, pull #8
- mov r4, r4, push #24
- orr r4, r4, r3, pull #8
- stmdb r0!, {r4, r5, r6, r7}
- bge 42b
- PLD( cmn r2, #32 )
- PLD( bge 43b )
- PLD( add r2, r2, #32 )
- adds r2, r2, #12
- blt 45f
-44: mov ip, r3, push #24
- ldr r3, [r1, #-4]!
- subs r2, r2, #4
- orr ip, ip, r3, pull #8
- str ip, [r0, #-4]!
- bge 44b
-45: add r1, r1, #1
- b 29b
+#include "copy_template.S"
diff --git a/arch/arm/lib/memmove.S b/arch/arm/lib/memmove.S
new file mode 100644
index 00000000000..ef7fddc14ac
--- /dev/null
+++ b/arch/arm/lib/memmove.S
@@ -0,0 +1,206 @@
+/*
+ * linux/arch/arm/lib/memmove.S
+ *
+ * Author: Nicolas Pitre
+ * Created: Sep 28, 2005
+ * Copyright: (C) MontaVista Software Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/linkage.h>
+#include <asm/assembler.h>
+
+/*
+ * This can be used to enable code to cacheline align the source pointer.
+ * Experiments on tested architectures (StrongARM and XScale) didn't show
+ * this a worthwhile thing to do. That might be different in the future.
+ */
+//#define CALGN(code...) code
+#define CALGN(code...)
+
+ .text
+
+/*
+ * Prototype: void *memmove(void *dest, const void *src, size_t n);
+ *
+ * Note:
+ *
+ * If the memory regions don't overlap, we simply branch to memcpy which is
+ * normally a bit faster. Otherwise the copy is done going downwards. This
+ * is a transposition of the code from copy_template.S but with the copy
+ * occurring in the opposite direction.
+ */
+
+ENTRY(memmove)
+
+ subs ip, r0, r1
+ cmphi r2, ip
+ bls memcpy
+
+ stmfd sp!, {r0, r4, lr}
+ add r1, r1, r2
+ add r0, r0, r2
+ subs r2, r2, #4
+ blt 8f
+ ands ip, r0, #3
+ PLD( pld [r1, #-4] )
+ bne 9f
+ ands ip, r1, #3
+ bne 10f
+
+1: subs r2, r2, #(28)
+ stmfd sp!, {r5 - r8}
+ blt 5f
+
+ CALGN( ands ip, r1, #31 )
+ CALGN( sbcnes r4, ip, r2 ) @ C is always set here
+ CALGN( bcs 2f )
+ CALGN( adr r4, 6f )
+ CALGN( subs r2, r2, ip ) @ C is set here
+ CALGN( add pc, r4, ip )
+
+ PLD( pld [r1, #-4] )
+2: PLD( subs r2, r2, #96 )
+ PLD( pld [r1, #-32] )
+ PLD( blt 4f )
+ PLD( pld [r1, #-64] )
+ PLD( pld [r1, #-96] )
+
+3: PLD( pld [r1, #-128] )
+4: ldmdb r1!, {r3, r4, r5, r6, r7, r8, ip, lr}
+ subs r2, r2, #32
+ stmdb r0!, {r3, r4, r5, r6, r7, r8, ip, lr}
+ bge 3b
+ PLD( cmn r2, #96 )
+ PLD( bge 4b )
+
+5: ands ip, r2, #28
+ rsb ip, ip, #32
+ addne pc, pc, ip @ C is always clear here
+ b 7f
+6: nop
+ ldr r3, [r1, #-4]!
+ ldr r4, [r1, #-4]!
+ ldr r5, [r1, #-4]!
+ ldr r6, [r1, #-4]!
+ ldr r7, [r1, #-4]!
+ ldr r8, [r1, #-4]!
+ ldr lr, [r1, #-4]!
+
+ add pc, pc, ip
+ nop
+ nop
+ str r3, [r0, #-4]!
+ str r4, [r0, #-4]!
+ str r5, [r0, #-4]!
+ str r6, [r0, #-4]!
+ str r7, [r0, #-4]!
+ str r8, [r0, #-4]!
+ str lr, [r0, #-4]!
+
+ CALGN( bcs 2b )
+
+7: ldmfd sp!, {r5 - r8}
+
+8: movs r2, r2, lsl #31
+ ldrneb r3, [r1, #-1]!
+ ldrcsb r4, [r1, #-1]!
+ ldrcsb ip, [r1, #-1]
+ strneb r3, [r0, #-1]!
+ strcsb r4, [r0, #-1]!
+ strcsb ip, [r0, #-1]
+ ldmfd sp!, {r0, r4, pc}
+
+9: cmp ip, #2
+ ldrgtb r3, [r1, #-1]!
+ ldrgeb r4, [r1, #-1]!
+ ldrb lr, [r1, #-1]!
+ strgtb r3, [r0, #-1]!
+ strgeb r4, [r0, #-1]!
+ subs r2, r2, ip
+ strb lr, [r0, #-1]!
+ blt 8b
+ ands ip, r1, #3
+ beq 1b
+
+10: bic r1, r1, #3
+ cmp ip, #2
+ ldr r3, [r1, #0]
+ beq 17f
+ blt 18f
+
+
+ .macro backward_copy_shift push pull
+
+ subs r2, r2, #28
+ blt 14f
+
+ CALGN( ands ip, r1, #31 )
+ CALGN( rsb ip, ip, #32 )
+ CALGN( sbcnes r4, ip, r2 ) @ C is always set here
+ CALGN( subcc r2, r2, ip )
+ CALGN( bcc 15f )
+
+11: stmfd sp!, {r5 - r9}
+
+ PLD( pld [r1, #-4] )
+ PLD( subs r2, r2, #96 )
+ PLD( pld [r1, #-32] )
+ PLD( blt 13f )
+ PLD( pld [r1, #-64] )
+ PLD( pld [r1, #-96] )
+
+12: PLD( pld [r1, #-128] )
+13: ldmdb r1!, {r7, r8, r9, ip}
+ mov lr, r3, push #\push
+ subs r2, r2, #32
+ ldmdb r1!, {r3, r4, r5, r6}
+ orr lr, lr, ip, pull #\pull
+ mov ip, ip, push #\push
+ orr ip, ip, r9, pull #\pull
+ mov r9, r9, push #\push
+ orr r9, r9, r8, pull #\pull
+ mov r8, r8, push #\push
+ orr r8, r8, r7, pull #\pull
+ mov r7, r7, push #\push
+ orr r7, r7, r6, pull #\pull
+ mov r6, r6, push #\push
+ orr r6, r6, r5, pull #\pull
+ mov r5, r5, push #\push
+ orr r5, r5, r4, pull #\pull
+ mov r4, r4, push #\push
+ orr r4, r4, r3, pull #\pull
+ stmdb r0!, {r4 - r9, ip, lr}
+ bge 12b
+ PLD( cmn r2, #96 )
+ PLD( bge 13b )
+
+ ldmfd sp!, {r5 - r9}
+
+14: ands ip, r2, #28
+ beq 16f
+
+15: mov lr, r3, push #\push
+ ldr r3, [r1, #-4]!
+ subs ip, ip, #4
+ orr lr, lr, r3, pull #\pull
+ str lr, [r0, #-4]!
+ bgt 15b
+ CALGN( cmp r2, #0 )
+ CALGN( bge 11b )
+
+16: add r1, r1, #(\pull / 8)
+ b 8b
+
+ .endm
+
+
+ backward_copy_shift push=8 pull=24
+
+17: backward_copy_shift push=16 pull=16
+
+18: backward_copy_shift push=24 pull=8
+
diff --git a/arch/arm/lib/muldi3.S b/arch/arm/lib/muldi3.S
new file mode 100644
index 00000000000..c7fbdf00531
--- /dev/null
+++ b/arch/arm/lib/muldi3.S
@@ -0,0 +1,44 @@
+/*
+ * linux/arch/arm/lib/muldi3.S
+ *
+ * Author: Nicolas Pitre
+ * Created: Oct 19, 2005
+ * Copyright: Monta Vista Software, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/linkage.h>
+
+#ifdef __ARMEB__
+#define xh r0
+#define xl r1
+#define yh r2
+#define yl r3
+#else
+#define xl r0
+#define xh r1
+#define yl r2
+#define yh r3
+#endif
+
+ENTRY(__muldi3)
+
+ mul xh, yl, xh
+ mla xh, xl, yh, xh
+ mov ip, xl, asr #16
+ mov yh, yl, asr #16
+ bic xl, xl, ip, lsl #16
+ bic yl, yl, yh, lsl #16
+ mla xh, yh, ip, xh
+ mul yh, xl, yh
+ mul xl, yl, xl
+ mul ip, yl, ip
+ adds xl, xl, yh, lsl #16
+ adc xh, xh, yh, lsr #16
+ adds xl, xl, ip, lsl #16
+ adc xh, xh, ip, lsr #16
+ mov pc, lr
+
diff --git a/arch/arm/lib/muldi3.c b/arch/arm/lib/muldi3.c
deleted file mode 100644
index 0a3b93313f1..00000000000
--- a/arch/arm/lib/muldi3.c
+++ /dev/null
@@ -1,72 +0,0 @@
-/* More subroutines needed by GCC output code on some machines. */
-/* Compile this one with gcc. */
-/* Copyright (C) 1989, 92-98, 1999 Free Software Foundation, Inc.
-
-This file is part of GNU CC.
-
-GNU CC 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, or (at your option)
-any later version.
-
-GNU CC 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 GNU CC; see the file COPYING. If not, write to
-the Free Software Foundation, 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA. */
-
-/* As a special exception, if you link this library with other files,
- some of which are compiled with GCC, to produce an executable,
- this library does not by itself cause the resulting executable
- to be covered by the GNU General Public License.
- This exception does not however invalidate any other reasons why
- the executable file might be covered by the GNU General Public License.
- */
-/* support functions required by the kernel. based on code from gcc-2.95.3 */
-/* I Molton 29/07/01 */
-
-#include "gcclib.h"
-
-#define umul_ppmm(xh, xl, a, b) \
-{register u32 __t0, __t1, __t2; \
- __asm__ ("%@ Inlined umul_ppmm \n\
- mov %2, %5, lsr #16 \n\
- mov %0, %6, lsr #16 \n\
- bic %3, %5, %2, lsl #16 \n\
- bic %4, %6, %0, lsl #16 \n\
- mul %1, %3, %4 \n\
- mul %4, %2, %4 \n\
- mul %3, %0, %3 \n\
- mul %0, %2, %0 \n\
- adds %3, %4, %3 \n\
- addcs %0, %0, #65536 \n\
- adds %1, %1, %3, lsl #16 \n\
- adc %0, %0, %3, lsr #16" \
- : "=&r" ((u32) (xh)), \
- "=r" ((u32) (xl)), \
- "=&r" (__t0), "=&r" (__t1), "=r" (__t2) \
- : "r" ((u32) (a)), \
- "r" ((u32) (b)));}
-
-#define __umulsidi3(u, v) \
- ({DIunion __w; \
- umul_ppmm (__w.s.high, __w.s.low, u, v); \
- __w.ll; })
-
-s64 __muldi3(s64 u, s64 v)
-{
- DIunion w;
- DIunion uu, vv;
-
- uu.ll = u, vv.ll = v;
-
- w.ll = __umulsidi3(uu.s.low, vv.s.low);
- w.s.high += ((u32) uu.s.low * (u32) vv.s.high
- + (u32) uu.s.high * (u32) vv.s.low);
-
- return w.ll;
-}
diff --git a/arch/arm/lib/uaccess.S b/arch/arm/lib/uaccess.S
index d3ed0636c00..6f1b5b49fe4 100644
--- a/arch/arm/lib/uaccess.S
+++ b/arch/arm/lib/uaccess.S
@@ -43,8 +43,6 @@ ENTRY(__arch_copy_to_user)
stmfd sp!, {r2, r4 - r7, lr}
cmp r2, #4
blt .c2u_not_enough
- PLD( pld [r1, #0] )
- PLD( pld [r0, #0] )
ands ip, r0, #3
bne .c2u_dest_not_aligned
.c2u_dest_aligned:
@@ -73,25 +71,13 @@ USER( strt r3, [r0], #4) @ May fault
sub r2, r2, ip
subs ip, ip, #32
blt .c2u_0rem8lp
- PLD( pld [r1, #28] )
- PLD( pld [r0, #28] )
- PLD( subs ip, ip, #64 )
- PLD( blt .c2u_0cpynopld )
- PLD( pld [r1, #60] )
- PLD( pld [r0, #60] )
-
-.c2u_0cpy8lp:
- PLD( pld [r1, #92] )
- PLD( pld [r0, #92] )
-.c2u_0cpynopld: ldmia r1!, {r3 - r6}
+
+.c2u_0cpy8lp: ldmia r1!, {r3 - r6}
stmia r0!, {r3 - r6} @ Shouldnt fault
ldmia r1!, {r3 - r6}
subs ip, ip, #32
stmia r0!, {r3 - r6} @ Shouldnt fault
bpl .c2u_0cpy8lp
- PLD( cmn ip, #64 )
- PLD( bge .c2u_0cpynopld )
- PLD( add ip, ip, #64 )
.c2u_0rem8lp: cmn ip, #16
ldmgeia r1!, {r3 - r6}
@@ -143,17 +129,8 @@ USER( strt r3, [r0], #4) @ May fault
sub r2, r2, ip
subs ip, ip, #16
blt .c2u_1rem8lp
- PLD( pld [r1, #12] )
- PLD( pld [r0, #12] )
- PLD( subs ip, ip, #32 )
- PLD( blt .c2u_1cpynopld )
- PLD( pld [r1, #28] )
- PLD( pld [r0, #28] )
-
-.c2u_1cpy8lp:
- PLD( pld [r1, #44] )
- PLD( pld [r0, #44] )
-.c2u_1cpynopld: mov r3, r7, pull #8
+
+.c2u_1cpy8lp: mov r3, r7, pull #8
ldmia r1!, {r4 - r7}
subs ip, ip, #16
orr r3, r3, r4, push #24
@@ -165,9 +142,6 @@ USER( strt r3, [r0], #4) @ May fault
orr r6, r6, r7, push #24
stmia r0!, {r3 - r6} @ Shouldnt fault
bpl .c2u_1cpy8lp
- PLD( cmn ip, #32 )
- PLD( bge .c2u_1cpynopld )
- PLD( add ip, ip, #32 )
.c2u_1rem8lp: tst ip, #8
movne r3, r7, pull #8
@@ -210,17 +184,8 @@ USER( strt r3, [r0], #4) @ May fault
sub r2, r2, ip
subs ip, ip, #16
blt .c2u_2rem8lp
- PLD( pld [r1, #12] )
- PLD( pld [r0, #12] )
- PLD( subs ip, ip, #32 )
- PLD( blt .c2u_2cpynopld )
- PLD( pld [r1, #28] )
- PLD( pld [r0, #28] )
-
-.c2u_2cpy8lp:
- PLD( pld [r1, #44] )
- PLD( pld [r0, #44] )
-.c2u_2cpynopld: mov r3, r7, pull #16
+
+.c2u_2cpy8lp: mov r3, r7, pull #16
ldmia r1!, {r4 - r7}
subs ip, ip, #16
orr r3, r3, r4, push #16
@@ -232,9 +197,6 @@ USER( strt r3, [r0], #4) @ May fault
orr r6, r6, r7, push #16
stmia r0!, {r3 - r6} @ Shouldnt fault
bpl .c2u_2cpy8lp
- PLD( cmn ip, #32 )
- PLD( bge .c2u_2cpynopld )
- PLD( add ip, ip, #32 )
.c2u_2rem8lp: tst ip, #8
movne r3, r7, pull #16
@@ -277,17 +239,8 @@ USER( strt r3, [r0], #4) @ May fault
sub r2, r2, ip
subs ip, ip, #16
blt .c2u_3rem8lp
- PLD( pld [r1, #12] )
- PLD( pld [r0, #12] )
- PLD( subs ip, ip, #32 )
- PLD( blt .c2u_3cpynopld )
- PLD( pld [r1, #28] )
- PLD( pld [r0, #28] )
-
-.c2u_3cpy8lp:
- PLD( pld [r1, #44] )
- PLD( pld [r0, #44] )
-.c2u_3cpynopld: mov r3, r7, pull #24
+
+.c2u_3cpy8lp: mov r3, r7, pull #24
ldmia r1!, {r4 - r7}
subs ip, ip, #16
orr r3, r3, r4, push #8
@@ -299,9 +252,6 @@ USER( strt r3, [r0], #4) @ May fault
orr r6, r6, r7, push #8
stmia r0!, {r3 - r6} @ Shouldnt fault
bpl .c2u_3cpy8lp
- PLD( cmn ip, #32 )
- PLD( bge .c2u_3cpynopld )
- PLD( add ip, ip, #32 )
.c2u_3rem8lp: tst ip, #8
movne r3, r7, pull #24
@@ -356,8 +306,6 @@ ENTRY(__arch_copy_from_user)
stmfd sp!, {r0, r2, r4 - r7, lr}
cmp r2, #4
blt .cfu_not_enough
- PLD( pld [r1, #0] )
- PLD( pld [r0, #0] )
ands ip, r0, #3
bne .cfu_dest_not_aligned
.cfu_dest_aligned:
@@ -385,25 +333,13 @@ USER( ldrt r3, [r1], #4)
sub r2, r2, ip
subs ip, ip, #32
blt .cfu_0rem8lp
- PLD( pld [r1, #28] )
- PLD( pld [r0, #28] )
- PLD( subs ip, ip, #64 )
- PLD( blt .cfu_0cpynopld )
- PLD( pld [r1, #60] )
- PLD( pld [r0, #60] )
-
-.cfu_0cpy8lp:
- PLD( pld [r1, #92] )
- PLD( pld [r0, #92] )
-.cfu_0cpynopld: ldmia r1!, {r3 - r6} @ Shouldnt fault
+
+.cfu_0cpy8lp: ldmia r1!, {r3 - r6} @ Shouldnt fault
stmia r0!, {r3 - r6}
ldmia r1!, {r3 - r6} @ Shouldnt fault
subs ip, ip, #32
stmia r0!, {r3 - r6}
bpl .cfu_0cpy8lp
- PLD( cmn ip, #64 )
- PLD( bge .cfu_0cpynopld )
- PLD( add ip, ip, #64 )
.cfu_0rem8lp: cmn ip, #16
ldmgeia r1!, {r3 - r6} @ Shouldnt fault
@@ -456,17 +392,8 @@ USER( ldrt r7, [r1], #4) @ May fault
sub r2, r2, ip
subs ip, ip, #16
blt .cfu_1rem8lp
- PLD( pld [r1, #12] )
- PLD( pld [r0, #12] )
- PLD( subs ip, ip, #32 )
- PLD( blt .cfu_1cpynopld )
- PLD( pld [r1, #28] )
- PLD( pld [r0, #28] )
-
-.cfu_1cpy8lp:
- PLD( pld [r1, #44] )
- PLD( pld [r0, #44] )
-.cfu_1cpynopld: mov r3, r7, pull #8
+
+.cfu_1cpy8lp: mov r3, r7, pull #8
ldmia r1!, {r4 - r7} @ Shouldnt fault
subs ip, ip, #16
orr r3, r3, r4, push #24
@@ -478,9 +405,6 @@ USER( ldrt r7, [r1], #4) @ May fault
orr r6, r6, r7, push #24
stmia r0!, {r3 - r6}
bpl .cfu_1cpy8lp
- PLD( cmn ip, #32 )
- PLD( bge .cfu_1cpynopld )
- PLD( add ip, ip, #32 )
.cfu_1rem8lp: tst ip, #8
movne r3, r7, pull #8
@@ -523,17 +447,8 @@ USER( ldrt r7, [r1], #4) @ May fault
sub r2, r2, ip
subs ip, ip, #16
blt .cfu_2rem8lp
- PLD( pld [r1, #12] )
- PLD( pld [r0, #12] )
- PLD( subs ip, ip, #32 )
- PLD( blt .cfu_2cpynopld )
- PLD( pld [r1, #28] )
- PLD( pld [r0, #28] )
-
-.cfu_2cpy8lp:
- PLD( pld [r1, #44] )
- PLD( pld [r0, #44] )
-.cfu_2cpynopld: mov r3, r7, pull #16
+
+.cfu_2cpy8lp: mov r3, r7, pull #16
ldmia r1!, {r4 - r7} @ Shouldnt fault
subs ip, ip, #16
orr r3, r3, r4, push #16
@@ -545,9 +460,6 @@ USER( ldrt r7, [r1], #4) @ May fault
orr r6, r6, r7, push #16
stmia r0!, {r3 - r6}
bpl .cfu_2cpy8lp
- PLD( cmn ip, #32 )
- PLD( bge .cfu_2cpynopld )
- PLD( add ip, ip, #32 )
.cfu_2rem8lp: tst ip, #8
movne r3, r7, pull #16
@@ -590,17 +502,8 @@ USER( ldrt r7, [r1], #4) @ May fault
sub r2, r2, ip
subs ip, ip, #16
blt .cfu_3rem8lp
- PLD( pld [r1, #12] )
- PLD( pld [r0, #12] )
- PLD( subs ip, ip, #32 )
- PLD( blt .cfu_3cpynopld )
- PLD( pld [r1, #28] )
- PLD( pld [r0, #28] )
-
-.cfu_3cpy8lp:
- PLD( pld [r1, #44] )
- PLD( pld [r0, #44] )
-.cfu_3cpynopld: mov r3, r7, pull #24
+
+.cfu_3cpy8lp: mov r3, r7, pull #24
ldmia r1!, {r4 - r7} @ Shouldnt fault
orr r3, r3, r4, push #8
mov r4, r4, pull #24
@@ -612,9 +515,6 @@ USER( ldrt r7, [r1], #4) @ May fault
stmia r0!, {r3 - r6}
subs ip, ip, #16
bpl .cfu_3cpy8lp
- PLD( cmn ip, #32 )
- PLD( bge .cfu_3cpynopld )
- PLD( add ip, ip, #32 )
.cfu_3rem8lp: tst ip, #8
movne r3, r7, pull #24
@@ -657,41 +557,3 @@ USER( ldrgtbt r3, [r1], #1) @ May fault
LOADREGS(fd,sp!, {r4 - r7, pc})
.previous
-/* Prototype: int __arch_clear_user(void *addr, size_t sz)
- * Purpose : clear some user memory
- * Params : addr - user memory address to clear
- * : sz - number of bytes to clear
- * Returns : number of bytes NOT cleared
- */
-ENTRY(__arch_clear_user)
- stmfd sp!, {r1, lr}
- mov r2, #0
- cmp r1, #4
- blt 2f
- ands ip, r0, #3
- beq 1f
- cmp ip, #2
-USER( strbt r2, [r0], #1)
-USER( strlebt r2, [r0], #1)
-USER( strltbt r2, [r0], #1)
- rsb ip, ip, #4
- sub r1, r1, ip @ 7 6 5 4 3 2 1
-1: subs r1, r1, #8 @ -1 -2 -3 -4 -5 -6 -7
-USER( strplt r2, [r0], #4)
-USER( strplt r2, [r0], #4)
- bpl 1b
- adds r1, r1, #4 @ 3 2 1 0 -1 -2 -3
-USER( strplt r2, [r0], #4)
-2: tst r1, #2 @ 1x 1x 0x 0x 1x 1x 0x
-USER( strnebt r2, [r0], #1)
-USER( strnebt r2, [r0], #1)
- tst r1, #1 @ x1 x0 x1 x0 x1 x0 x1
-USER( strnebt r2, [r0], #1)
- mov r0, #0
- LOADREGS(fd,sp!, {r1, pc})
-
- .section .fixup,"ax"
- .align 0
-9001: LOADREGS(fd,sp!, {r0, pc})
- .previous
-
diff --git a/arch/arm/lib/ucmpdi2.S b/arch/arm/lib/ucmpdi2.S
new file mode 100644
index 00000000000..112630f93e5
--- /dev/null
+++ b/arch/arm/lib/ucmpdi2.S
@@ -0,0 +1,35 @@
+/*
+ * linux/arch/arm/lib/ucmpdi2.S
+ *
+ * Author: Nicolas Pitre
+ * Created: Oct 19, 2005
+ * Copyright: Monta Vista Software, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/linkage.h>
+
+#ifdef __ARMEB__
+#define xh r0
+#define xl r1
+#define yh r2
+#define yl r3
+#else
+#define xl r0
+#define xh r1
+#define yl r2
+#define yh r3
+#endif
+
+ENTRY(__ucmpdi2)
+
+ cmp xh, yh
+ cmpeq xl, yl
+ movlo r0, #0
+ moveq r0, #1
+ movhi r0, #2
+ mov pc, lr
+
diff --git a/arch/arm/lib/ucmpdi2.c b/arch/arm/lib/ucmpdi2.c
deleted file mode 100644
index 57f3f2df385..00000000000
--- a/arch/arm/lib/ucmpdi2.c
+++ /dev/null
@@ -1,49 +0,0 @@
-/* More subroutines needed by GCC output code on some machines. */
-/* Compile this one with gcc. */
-/* Copyright (C) 1989, 92-98, 1999 Free Software Foundation, Inc.
-
-This file is part of GNU CC.
-
-GNU CC 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, or (at your option)
-any later version.
-
-GNU CC 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 GNU CC; see the file COPYING. If not, write to
-the Free Software Foundation, 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA. */
-
-/* As a special exception, if you link this library with other files,
- some of which are compiled with GCC, to produce an executable,
- this library does not by itself cause the resulting executable
- to be covered by the GNU General Public License.
- This exception does not however invalidate any other reasons why
- the executable file might be covered by the GNU General Public License.
- */
-/* support functions required by the kernel. based on code from gcc-2.95.3 */
-/* I Molton 29/07/01 */
-
-#include "gcclib.h"
-
-int __ucmpdi2(s64 a, s64 b)
-{
- DIunion au, bu;
-
- au.ll = a, bu.ll = b;
-
- if ((u32) au.s.high < (u32) bu.s.high)
- return 0;
- else if ((u32) au.s.high > (u32) bu.s.high)
- return 2;
- if ((u32) au.s.low < (u32) bu.s.low)
- return 0;
- else if ((u32) au.s.low > (u32) bu.s.low)
- return 2;
- return 1;
-}
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