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-rw-r--r--arch/arm64/lib/Makefile4
-rw-r--r--arch/arm64/lib/bitops.S68
-rw-r--r--arch/arm64/lib/memchr.S (renamed from arch/arm64/lib/bitops.c)37
-rw-r--r--arch/arm64/lib/memcpy.S53
-rw-r--r--arch/arm64/lib/memmove.S57
-rw-r--r--arch/arm64/lib/memset.S53
-rw-r--r--arch/arm64/lib/strchr.S42
-rw-r--r--arch/arm64/lib/strrchr.S43
8 files changed, 347 insertions, 10 deletions
diff --git a/arch/arm64/lib/Makefile b/arch/arm64/lib/Makefile
index 2fb7f6092aa..59acc0ef046 100644
--- a/arch/arm64/lib/Makefile
+++ b/arch/arm64/lib/Makefile
@@ -1,4 +1,6 @@
lib-y := bitops.o delay.o \
strncpy_from_user.o strnlen_user.o clear_user.o \
copy_from_user.o copy_to_user.o copy_in_user.o \
- copy_page.o clear_page.o
+ copy_page.o clear_page.o \
+ memchr.o memcpy.o memmove.o memset.o \
+ strchr.o strrchr.o
diff --git a/arch/arm64/lib/bitops.S b/arch/arm64/lib/bitops.S
new file mode 100644
index 00000000000..e5db797790d
--- /dev/null
+++ b/arch/arm64/lib/bitops.S
@@ -0,0 +1,68 @@
+/*
+ * Based on arch/arm/lib/bitops.h
+ *
+ * Copyright (C) 2013 ARM Ltd.
+ *
+ * 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 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 <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/linkage.h>
+#include <asm/assembler.h>
+
+/*
+ * x0: bits 5:0 bit offset
+ * bits 31:6 word offset
+ * x1: address
+ */
+ .macro bitop, name, instr
+ENTRY( \name )
+ and w3, w0, #63 // Get bit offset
+ eor w0, w0, w3 // Clear low bits
+ mov x2, #1
+ add x1, x1, x0, lsr #3 // Get word offset
+ lsl x3, x2, x3 // Create mask
+1: ldxr x2, [x1]
+ \instr x2, x2, x3
+ stxr w0, x2, [x1]
+ cbnz w0, 1b
+ ret
+ENDPROC(\name )
+ .endm
+
+ .macro testop, name, instr
+ENTRY( \name )
+ and w3, w0, #63 // Get bit offset
+ eor w0, w0, w3 // Clear low bits
+ mov x2, #1
+ add x1, x1, x0, lsr #3 // Get word offset
+ lsl x4, x2, x3 // Create mask
+1: ldaxr x2, [x1]
+ lsr x0, x2, x3 // Save old value of bit
+ \instr x2, x2, x4 // toggle bit
+ stlxr w5, x2, [x1]
+ cbnz w5, 1b
+ and x0, x0, #1
+3: ret
+ENDPROC(\name )
+ .endm
+
+/*
+ * Atomic bit operations.
+ */
+ bitop change_bit, eor
+ bitop clear_bit, bic
+ bitop set_bit, orr
+
+ testop test_and_change_bit, eor
+ testop test_and_clear_bit, bic
+ testop test_and_set_bit, orr
diff --git a/arch/arm64/lib/bitops.c b/arch/arm64/lib/memchr.S
index aa4965e60ac..8636b754916 100644
--- a/arch/arm64/lib/bitops.c
+++ b/arch/arm64/lib/memchr.S
@@ -1,5 +1,8 @@
/*
- * Copyright (C) 2012 ARM Limited
+ * Based on arch/arm/lib/memchr.S
+ *
+ * Copyright (C) 1995-2000 Russell King
+ * Copyright (C) 2013 ARM Ltd.
*
* 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
@@ -14,12 +17,28 @@
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
-#include <linux/kernel.h>
-#include <linux/spinlock.h>
-#include <linux/atomic.h>
+#include <linux/linkage.h>
+#include <asm/assembler.h>
-#ifdef CONFIG_SMP
-arch_spinlock_t __atomic_hash[ATOMIC_HASH_SIZE] __lock_aligned = {
- [0 ... (ATOMIC_HASH_SIZE-1)] = __ARCH_SPIN_LOCK_UNLOCKED
-};
-#endif
+/*
+ * Find a character in an area of memory.
+ *
+ * Parameters:
+ * x0 - buf
+ * x1 - c
+ * x2 - n
+ * Returns:
+ * x0 - address of first occurrence of 'c' or 0
+ */
+ENTRY(memchr)
+ and w1, w1, #0xff
+1: subs x2, x2, #1
+ b.mi 2f
+ ldrb w3, [x0], #1
+ cmp w3, w1
+ b.ne 1b
+ sub x0, x0, #1
+ ret
+2: mov x0, #0
+ ret
+ENDPROC(memchr)
diff --git a/arch/arm64/lib/memcpy.S b/arch/arm64/lib/memcpy.S
new file mode 100644
index 00000000000..27b5003609b
--- /dev/null
+++ b/arch/arm64/lib/memcpy.S
@@ -0,0 +1,53 @@
+/*
+ * Copyright (C) 2013 ARM Ltd.
+ *
+ * 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 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 <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/linkage.h>
+#include <asm/assembler.h>
+
+/*
+ * Copy a buffer from src to dest (alignment handled by the hardware)
+ *
+ * Parameters:
+ * x0 - dest
+ * x1 - src
+ * x2 - n
+ * Returns:
+ * x0 - dest
+ */
+ENTRY(memcpy)
+ mov x4, x0
+ subs x2, x2, #8
+ b.mi 2f
+1: ldr x3, [x1], #8
+ subs x2, x2, #8
+ str x3, [x4], #8
+ b.pl 1b
+2: adds x2, x2, #4
+ b.mi 3f
+ ldr w3, [x1], #4
+ sub x2, x2, #4
+ str w3, [x4], #4
+3: adds x2, x2, #2
+ b.mi 4f
+ ldrh w3, [x1], #2
+ sub x2, x2, #2
+ strh w3, [x4], #2
+4: adds x2, x2, #1
+ b.mi 5f
+ ldrb w3, [x1]
+ strb w3, [x4]
+5: ret
+ENDPROC(memcpy)
diff --git a/arch/arm64/lib/memmove.S b/arch/arm64/lib/memmove.S
new file mode 100644
index 00000000000..b79fdfa42d3
--- /dev/null
+++ b/arch/arm64/lib/memmove.S
@@ -0,0 +1,57 @@
+/*
+ * Copyright (C) 2013 ARM Ltd.
+ *
+ * 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 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 <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/linkage.h>
+#include <asm/assembler.h>
+
+/*
+ * Move a buffer from src to test (alignment handled by the hardware).
+ * If dest <= src, call memcpy, otherwise copy in reverse order.
+ *
+ * Parameters:
+ * x0 - dest
+ * x1 - src
+ * x2 - n
+ * Returns:
+ * x0 - dest
+ */
+ENTRY(memmove)
+ cmp x0, x1
+ b.ls memcpy
+ add x4, x0, x2
+ add x1, x1, x2
+ subs x2, x2, #8
+ b.mi 2f
+1: ldr x3, [x1, #-8]!
+ subs x2, x2, #8
+ str x3, [x4, #-8]!
+ b.pl 1b
+2: adds x2, x2, #4
+ b.mi 3f
+ ldr w3, [x1, #-4]!
+ sub x2, x2, #4
+ str w3, [x4, #-4]!
+3: adds x2, x2, #2
+ b.mi 4f
+ ldrh w3, [x1, #-2]!
+ sub x2, x2, #2
+ strh w3, [x4, #-2]!
+4: adds x2, x2, #1
+ b.mi 5f
+ ldrb w3, [x1, #-1]
+ strb w3, [x4, #-1]
+5: ret
+ENDPROC(memmove)
diff --git a/arch/arm64/lib/memset.S b/arch/arm64/lib/memset.S
new file mode 100644
index 00000000000..87e4a68fbbb
--- /dev/null
+++ b/arch/arm64/lib/memset.S
@@ -0,0 +1,53 @@
+/*
+ * Copyright (C) 2013 ARM Ltd.
+ *
+ * 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 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 <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/linkage.h>
+#include <asm/assembler.h>
+
+/*
+ * Fill in the buffer with character c (alignment handled by the hardware)
+ *
+ * Parameters:
+ * x0 - buf
+ * x1 - c
+ * x2 - n
+ * Returns:
+ * x0 - buf
+ */
+ENTRY(memset)
+ mov x4, x0
+ and w1, w1, #0xff
+ orr w1, w1, w1, lsl #8
+ orr w1, w1, w1, lsl #16
+ orr x1, x1, x1, lsl #32
+ subs x2, x2, #8
+ b.mi 2f
+1: str x1, [x4], #8
+ subs x2, x2, #8
+ b.pl 1b
+2: adds x2, x2, #4
+ b.mi 3f
+ sub x2, x2, #4
+ str w1, [x4], #4
+3: adds x2, x2, #2
+ b.mi 4f
+ sub x2, x2, #2
+ strh w1, [x4], #2
+4: adds x2, x2, #1
+ b.mi 5f
+ strb w1, [x4]
+5: ret
+ENDPROC(memset)
diff --git a/arch/arm64/lib/strchr.S b/arch/arm64/lib/strchr.S
new file mode 100644
index 00000000000..dae0cf5591f
--- /dev/null
+++ b/arch/arm64/lib/strchr.S
@@ -0,0 +1,42 @@
+/*
+ * Based on arch/arm/lib/strchr.S
+ *
+ * Copyright (C) 1995-2000 Russell King
+ * Copyright (C) 2013 ARM Ltd.
+ *
+ * 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 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 <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/linkage.h>
+#include <asm/assembler.h>
+
+/*
+ * Find the first occurrence of a character in a string.
+ *
+ * Parameters:
+ * x0 - str
+ * x1 - c
+ * Returns:
+ * x0 - address of first occurrence of 'c' or 0
+ */
+ENTRY(strchr)
+ and w1, w1, #0xff
+1: ldrb w2, [x0], #1
+ cmp w2, w1
+ ccmp w2, wzr, #4, ne
+ b.ne 1b
+ sub x0, x0, #1
+ cmp w2, w1
+ csel x0, x0, xzr, eq
+ ret
+ENDPROC(strchr)
diff --git a/arch/arm64/lib/strrchr.S b/arch/arm64/lib/strrchr.S
new file mode 100644
index 00000000000..61eabd9a289
--- /dev/null
+++ b/arch/arm64/lib/strrchr.S
@@ -0,0 +1,43 @@
+/*
+ * Based on arch/arm/lib/strrchr.S
+ *
+ * Copyright (C) 1995-2000 Russell King
+ * Copyright (C) 2013 ARM Ltd.
+ *
+ * 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 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 <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/linkage.h>
+#include <asm/assembler.h>
+
+/*
+ * Find the last occurrence of a character in a string.
+ *
+ * Parameters:
+ * x0 - str
+ * x1 - c
+ * Returns:
+ * x0 - address of last occurrence of 'c' or 0
+ */
+ENTRY(strrchr)
+ mov x3, #0
+ and w1, w1, #0xff
+1: ldrb w2, [x0], #1
+ cbz w2, 2f
+ cmp w2, w1
+ b.ne 1b
+ sub x3, x0, #1
+ b 1b
+2: mov x0, x3
+ ret
+ENDPROC(strrchr)
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