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authorYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 12:17:53 -0700
committerYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 15:44:42 -0700
commit9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch)
tree1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/arch/avr32/lib
parent98260f3884f4a202f9ca5eabed40b1354c489b29 (diff)
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/arch/avr32/lib')
-rw-r--r--kernel/arch/avr32/lib/Makefile11
-rw-r--r--kernel/arch/avr32/lib/__avr32_asr64.S31
-rw-r--r--kernel/arch/avr32/lib/__avr32_lsl64.S31
-rw-r--r--kernel/arch/avr32/lib/__avr32_lsr64.S31
-rw-r--r--kernel/arch/avr32/lib/clear_user.S76
-rw-r--r--kernel/arch/avr32/lib/copy_user.S119
-rw-r--r--kernel/arch/avr32/lib/csum_partial.S47
-rw-r--r--kernel/arch/avr32/lib/csum_partial_copy_generic.S99
-rw-r--r--kernel/arch/avr32/lib/delay.c57
-rw-r--r--kernel/arch/avr32/lib/findbit.S185
-rw-r--r--kernel/arch/avr32/lib/io-readsb.S49
-rw-r--r--kernel/arch/avr32/lib/io-readsl.S24
-rw-r--r--kernel/arch/avr32/lib/io-readsw.S43
-rw-r--r--kernel/arch/avr32/lib/io-writesb.S52
-rw-r--r--kernel/arch/avr32/lib/io-writesl.S20
-rw-r--r--kernel/arch/avr32/lib/io-writesw.S38
-rw-r--r--kernel/arch/avr32/lib/memcpy.S72
-rw-r--r--kernel/arch/avr32/lib/memset.S72
-rw-r--r--kernel/arch/avr32/lib/strncpy_from_user.S60
-rw-r--r--kernel/arch/avr32/lib/strnlen_user.S67
20 files changed, 1184 insertions, 0 deletions
diff --git a/kernel/arch/avr32/lib/Makefile b/kernel/arch/avr32/lib/Makefile
new file mode 100644
index 000000000..084d95bac
--- /dev/null
+++ b/kernel/arch/avr32/lib/Makefile
@@ -0,0 +1,11 @@
+#
+# Makefile for AVR32-specific library files
+#
+
+lib-y := copy_user.o clear_user.o
+lib-y += strncpy_from_user.o strnlen_user.o
+lib-y += delay.o memset.o memcpy.o findbit.o
+lib-y += csum_partial.o csum_partial_copy_generic.o
+lib-y += io-readsw.o io-readsl.o io-writesw.o io-writesl.o
+lib-y += io-readsb.o io-writesb.o
+lib-y += __avr32_lsl64.o __avr32_lsr64.o __avr32_asr64.o
diff --git a/kernel/arch/avr32/lib/__avr32_asr64.S b/kernel/arch/avr32/lib/__avr32_asr64.S
new file mode 100644
index 000000000..368b6bca4
--- /dev/null
+++ b/kernel/arch/avr32/lib/__avr32_asr64.S
@@ -0,0 +1,31 @@
+/*
+ * Copyright (C) 2005-2006 Atmel Corporation
+ *
+ * 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.
+ */
+
+ /*
+ * DWtype __avr32_asr64(DWtype u, word_type b)
+ */
+ .text
+ .global __avr32_asr64
+ .type __avr32_asr64,@function
+__avr32_asr64:
+ cp.w r12, 0
+ reteq r12
+
+ rsub r9, r12, 32
+ brle 1f
+
+ lsl r8, r11, r9
+ lsr r10, r10, r12
+ asr r11, r11, r12
+ or r10, r8
+ retal r12
+
+1: neg r9
+ asr r10, r11, r9
+ asr r11, 31
+ retal r12
diff --git a/kernel/arch/avr32/lib/__avr32_lsl64.S b/kernel/arch/avr32/lib/__avr32_lsl64.S
new file mode 100644
index 000000000..f1dbc2b36
--- /dev/null
+++ b/kernel/arch/avr32/lib/__avr32_lsl64.S
@@ -0,0 +1,31 @@
+/*
+ * Copyright (C) 2005-2006 Atmel Corporation
+ *
+ * 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.
+ */
+
+ /*
+ * DWtype __avr32_lsl64(DWtype u, word_type b)
+ */
+ .text
+ .global __avr32_lsl64
+ .type __avr32_lsl64,@function
+__avr32_lsl64:
+ cp.w r12, 0
+ reteq r12
+
+ rsub r9, r12, 32
+ brle 1f
+
+ lsr r8, r10, r9
+ lsl r10, r10, r12
+ lsl r11, r11, r12
+ or r11, r8
+ retal r12
+
+1: neg r9
+ lsl r11, r10, r9
+ mov r10, 0
+ retal r12
diff --git a/kernel/arch/avr32/lib/__avr32_lsr64.S b/kernel/arch/avr32/lib/__avr32_lsr64.S
new file mode 100644
index 000000000..e65bb7f0d
--- /dev/null
+++ b/kernel/arch/avr32/lib/__avr32_lsr64.S
@@ -0,0 +1,31 @@
+/*
+ * Copyright (C) 2005-2006 Atmel Corporation
+ *
+ * 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.
+ */
+
+ /*
+ * DWtype __avr32_lsr64(DWtype u, word_type b)
+ */
+ .text
+ .global __avr32_lsr64
+ .type __avr32_lsr64,@function
+__avr32_lsr64:
+ cp.w r12, 0
+ reteq r12
+
+ rsub r9, r12, 32
+ brle 1f
+
+ lsl r8, r11, r9
+ lsr r11, r11, r12
+ lsr r10, r10, r12
+ or r10, r8
+ retal r12
+
+1: neg r9
+ lsr r10, r11, r9
+ mov r11, 0
+ retal r12
diff --git a/kernel/arch/avr32/lib/clear_user.S b/kernel/arch/avr32/lib/clear_user.S
new file mode 100644
index 000000000..d8991b6f8
--- /dev/null
+++ b/kernel/arch/avr32/lib/clear_user.S
@@ -0,0 +1,76 @@
+/*
+ * Copyright 2004-2006 Atmel Corporation
+ *
+ * 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 <asm/page.h>
+#include <asm/thread_info.h>
+#include <asm/asm.h>
+
+ .text
+ .align 1
+ .global clear_user
+ .type clear_user, "function"
+clear_user:
+ branch_if_kernel r8, __clear_user
+ ret_if_privileged r8, r12, r11, r11
+
+ .global __clear_user
+ .type __clear_user, "function"
+__clear_user:
+ mov r9, r12
+ mov r8, 0
+ andl r9, 3, COH
+ brne 5f
+
+1: sub r11, 4
+ brlt 2f
+
+10: st.w r12++, r8
+ sub r11, 4
+ brge 10b
+
+2: sub r11, -4
+ reteq 0
+
+ /* Unaligned count or address */
+ bld r11, 1
+ brcc 12f
+11: st.h r12++, r8
+ sub r11, 2
+ reteq 0
+12: st.b r12++, r8
+ retal 0
+
+ /* Unaligned address */
+5: cp.w r11, 4
+ brlt 2b
+
+ lsl r9, 2
+ add pc, pc, r9
+13: st.b r12++, r8
+ sub r11, 1
+14: st.b r12++, r8
+ sub r11, 1
+15: st.b r12++, r8
+ sub r11, 1
+ rjmp 1b
+
+ .size clear_user, . - clear_user
+ .size __clear_user, . - __clear_user
+
+ .section .fixup, "ax"
+ .align 1
+18: sub r11, -4
+19: retal r11
+
+ .section __ex_table, "a"
+ .align 2
+ .long 10b, 18b
+ .long 11b, 19b
+ .long 12b, 19b
+ .long 13b, 19b
+ .long 14b, 19b
+ .long 15b, 19b
diff --git a/kernel/arch/avr32/lib/copy_user.S b/kernel/arch/avr32/lib/copy_user.S
new file mode 100644
index 000000000..ea59c04b0
--- /dev/null
+++ b/kernel/arch/avr32/lib/copy_user.S
@@ -0,0 +1,119 @@
+/*
+ * Copy to/from userspace with optional address space checking.
+ *
+ * Copyright 2004-2006 Atmel Corporation
+ *
+ * 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 <asm/page.h>
+#include <asm/thread_info.h>
+#include <asm/asm.h>
+
+ /*
+ * __kernel_size_t
+ * __copy_user(void *to, const void *from, __kernel_size_t n)
+ *
+ * Returns the number of bytes not copied. Might be off by
+ * max 3 bytes if we get a fault in the main loop.
+ *
+ * The address-space checking functions simply fall through to
+ * the non-checking version.
+ */
+ .text
+ .align 1
+ .global copy_from_user
+ .type copy_from_user, @function
+copy_from_user:
+ branch_if_kernel r8, __copy_user
+ ret_if_privileged r8, r11, r10, r10
+ rjmp __copy_user
+ .size copy_from_user, . - copy_from_user
+
+ .global copy_to_user
+ .type copy_to_user, @function
+copy_to_user:
+ branch_if_kernel r8, __copy_user
+ ret_if_privileged r8, r12, r10, r10
+ .size copy_to_user, . - copy_to_user
+
+ .global __copy_user
+ .type __copy_user, @function
+__copy_user:
+ mov r9, r11
+ andl r9, 3, COH
+ brne 6f
+
+ /* At this point, from is word-aligned */
+1: sub r10, 4
+ brlt 3f
+
+2:
+10: ld.w r8, r11++
+11: st.w r12++, r8
+ sub r10, 4
+ brge 2b
+
+3: sub r10, -4
+ reteq 0
+
+ /*
+ * Handle unaligned count. Need to be careful with r10 here so
+ * that we return the correct value even if we get a fault
+ */
+4:
+20: ld.ub r8, r11++
+21: st.b r12++, r8
+ sub r10, 1
+ reteq 0
+22: ld.ub r8, r11++
+23: st.b r12++, r8
+ sub r10, 1
+ reteq 0
+24: ld.ub r8, r11++
+25: st.b r12++, r8
+ retal 0
+
+ /* Handle unaligned from-pointer */
+6: cp.w r10, 4
+ brlt 4b
+ rsub r9, r9, 4
+
+30: ld.ub r8, r11++
+31: st.b r12++, r8
+ sub r10, 1
+ sub r9, 1
+ breq 1b
+32: ld.ub r8, r11++
+33: st.b r12++, r8
+ sub r10, 1
+ sub r9, 1
+ breq 1b
+34: ld.ub r8, r11++
+35: st.b r12++, r8
+ sub r10, 1
+ rjmp 1b
+ .size __copy_user, . - __copy_user
+
+ .section .fixup,"ax"
+ .align 1
+19: sub r10, -4
+29: retal r10
+
+ .section __ex_table,"a"
+ .align 2
+ .long 10b, 19b
+ .long 11b, 19b
+ .long 20b, 29b
+ .long 21b, 29b
+ .long 22b, 29b
+ .long 23b, 29b
+ .long 24b, 29b
+ .long 25b, 29b
+ .long 30b, 29b
+ .long 31b, 29b
+ .long 32b, 29b
+ .long 33b, 29b
+ .long 34b, 29b
+ .long 35b, 29b
diff --git a/kernel/arch/avr32/lib/csum_partial.S b/kernel/arch/avr32/lib/csum_partial.S
new file mode 100644
index 000000000..6a262b528
--- /dev/null
+++ b/kernel/arch/avr32/lib/csum_partial.S
@@ -0,0 +1,47 @@
+/*
+ * Copyright (C) 2004-2006 Atmel Corporation
+ *
+ * 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.
+ */
+
+ /*
+ * unsigned int csum_partial(const unsigned char *buff,
+ * int len, unsigned int sum)
+ */
+ .text
+ .global csum_partial
+ .type csum_partial,"function"
+ .align 1
+csum_partial:
+ /* checksum complete words, aligned or not */
+3: sub r11, 4
+ brlt 5f
+4: ld.w r9, r12++
+ add r10, r9
+ acr r10
+ sub r11, 4
+ brge 4b
+
+ /* return if we had a whole number of words */
+5: sub r11, -4
+ reteq r10
+
+ /* checksum any remaining bytes at the end */
+ mov r9, 0
+ mov r8, 0
+ cp r11, 2
+ brlt 6f
+ ld.uh r9, r12++
+ sub r11, 2
+ breq 7f
+ lsl r9, 16
+6: ld.ub r8, r12++
+ lsl r8, 8
+7: or r9, r8
+ add r10, r9
+ acr r10
+
+ retal r10
+ .size csum_partial, . - csum_partial
diff --git a/kernel/arch/avr32/lib/csum_partial_copy_generic.S b/kernel/arch/avr32/lib/csum_partial_copy_generic.S
new file mode 100644
index 000000000..a3a0f9b89
--- /dev/null
+++ b/kernel/arch/avr32/lib/csum_partial_copy_generic.S
@@ -0,0 +1,99 @@
+/*
+ * Copyright (C) 2004-2006 Atmel Corporation
+ *
+ * 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 <asm/errno.h>
+#include <asm/asm.h>
+
+ /*
+ * unsigned int csum_partial_copy_generic(const char *src, char *dst, int len
+ * int sum, int *src_err_ptr,
+ * int *dst_err_ptr)
+ *
+ * Copy src to dst while checksumming, otherwise like csum_partial.
+ */
+
+ .macro ld_src size, reg, ptr
+9999: ld.\size \reg, \ptr
+ .section __ex_table, "a"
+ .long 9999b, fixup_ld_src
+ .previous
+ .endm
+
+ .macro st_dst size, ptr, reg
+9999: st.\size \ptr, \reg
+ .section __ex_table, "a"
+ .long 9999b, fixup_st_dst
+ .previous
+ .endm
+
+ .text
+ .global csum_partial_copy_generic
+ .type csum_partial_copy_generic,"function"
+ .align 1
+csum_partial_copy_generic:
+ pushm r4-r7,lr
+
+ /* The inner loop */
+1: sub r10, 4
+ brlt 5f
+2: ld_src w, r5, r12++
+ st_dst w, r11++, r5
+ add r9, r5
+ acr r9
+ sub r10, 4
+ brge 2b
+
+ /* return if we had a whole number of words */
+5: sub r10, -4
+ brne 7f
+
+6: mov r12, r9
+ popm r4-r7,pc
+
+ /* handle additional bytes at the tail */
+7: mov r5, 0
+ mov r4, 32
+8: ld_src ub, r6, r12++
+ st_dst b, r11++, r6
+ lsl r5, 8
+ sub r4, 8
+ bfins r5, r6, 0, 8
+ sub r10, 1
+ brne 8b
+
+ lsl r5, r5, r4
+ add r9, r5
+ acr r9
+ rjmp 6b
+
+ /* Exception handler */
+ .section .fixup,"ax"
+ .align 1
+fixup_ld_src:
+ mov r9, -EFAULT
+ cp.w r8, 0
+ breq 1f
+ st.w r8[0], r9
+
+1: /*
+ * TODO: zero the complete destination - computing the rest
+ * is too much work
+ */
+
+ mov r9, 0
+ rjmp 6b
+
+fixup_st_dst:
+ mov r9, -EFAULT
+ lddsp r8, sp[20]
+ cp.w r8, 0
+ breq 1f
+ st.w r8[0], r9
+1: mov r9, 0
+ rjmp 6b
+
+ .previous
diff --git a/kernel/arch/avr32/lib/delay.c b/kernel/arch/avr32/lib/delay.c
new file mode 100644
index 000000000..c2f4a07dc
--- /dev/null
+++ b/kernel/arch/avr32/lib/delay.c
@@ -0,0 +1,57 @@
+/*
+ * Precise Delay Loops for avr32
+ *
+ * Copyright (C) 1993 Linus Torvalds
+ * Copyright (C) 1997 Martin Mares <mj@atrey.karlin.mff.cuni.cz>
+ * Copyright (C) 2005-2006 Atmel Corporation
+ *
+ * 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/delay.h>
+#include <linux/module.h>
+#include <linux/timex.h>
+#include <linux/param.h>
+#include <linux/types.h>
+#include <linux/init.h>
+
+#include <asm/processor.h>
+#include <asm/sysreg.h>
+
+int read_current_timer(unsigned long *timer_value)
+{
+ *timer_value = sysreg_read(COUNT);
+ return 0;
+}
+
+void __delay(unsigned long loops)
+{
+ unsigned bclock, now;
+
+ bclock = sysreg_read(COUNT);
+ do {
+ now = sysreg_read(COUNT);
+ } while ((now - bclock) < loops);
+}
+
+inline void __const_udelay(unsigned long xloops)
+{
+ unsigned long long loops;
+
+ asm("mulu.d %0, %1, %2"
+ : "=r"(loops)
+ : "r"(current_cpu_data.loops_per_jiffy * HZ), "r"(xloops));
+ __delay(loops >> 32);
+}
+
+void __udelay(unsigned long usecs)
+{
+ __const_udelay(usecs * 0x000010c7); /* 2**32 / 1000000 (rounded up) */
+}
+
+void __ndelay(unsigned long nsecs)
+{
+ __const_udelay(nsecs * 0x00005); /* 2**32 / 1000000000 (rounded up) */
+}
diff --git a/kernel/arch/avr32/lib/findbit.S b/kernel/arch/avr32/lib/findbit.S
new file mode 100644
index 000000000..b93586460
--- /dev/null
+++ b/kernel/arch/avr32/lib/findbit.S
@@ -0,0 +1,185 @@
+/*
+ * Copyright (C) 2006 Atmel Corporation
+ *
+ * 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>
+
+ .text
+ /*
+ * unsigned long find_first_zero_bit(const unsigned long *addr,
+ * unsigned long size)
+ */
+ENTRY(find_first_zero_bit)
+ cp.w r11, 0
+ reteq r11
+ mov r9, r11
+1: ld.w r8, r12[0]
+ com r8
+ brne .L_found
+ sub r12, -4
+ sub r9, 32
+ brgt 1b
+ retal r11
+
+ /*
+ * unsigned long find_next_zero_bit(const unsigned long *addr,
+ * unsigned long size,
+ * unsigned long offset)
+ */
+ENTRY(find_next_zero_bit)
+ lsr r8, r10, 5
+ sub r9, r11, r10
+ retle r11
+
+ lsl r8, 2
+ add r12, r8
+ andl r10, 31, COH
+ breq 1f
+
+ /* offset is not word-aligned. Handle the first (32 - r10) bits */
+ ld.w r8, r12[0]
+ com r8
+ sub r12, -4
+ lsr r8, r8, r10
+ brne .L_found
+
+ /* r9 = r9 - (32 - r10) = r9 + r10 - 32 */
+ add r9, r10
+ sub r9, 32
+ retle r11
+
+ /* Main loop. offset must be word-aligned */
+1: ld.w r8, r12[0]
+ com r8
+ brne .L_found
+ sub r12, -4
+ sub r9, 32
+ brgt 1b
+ retal r11
+
+ /* Common return path for when a bit is actually found. */
+.L_found:
+ brev r8
+ clz r10, r8
+ rsub r9, r11
+ add r10, r9
+
+ /* XXX: If we don't have to return exactly "size" when the bit
+ is not found, we may drop this "min" thing */
+ min r12, r11, r10
+ retal r12
+
+ /*
+ * unsigned long find_first_bit(const unsigned long *addr,
+ * unsigned long size)
+ */
+ENTRY(find_first_bit)
+ cp.w r11, 0
+ reteq r11
+ mov r9, r11
+1: ld.w r8, r12[0]
+ cp.w r8, 0
+ brne .L_found
+ sub r12, -4
+ sub r9, 32
+ brgt 1b
+ retal r11
+
+ /*
+ * unsigned long find_next_bit(const unsigned long *addr,
+ * unsigned long size,
+ * unsigned long offset)
+ */
+ENTRY(find_next_bit)
+ lsr r8, r10, 5
+ sub r9, r11, r10
+ retle r11
+
+ lsl r8, 2
+ add r12, r8
+ andl r10, 31, COH
+ breq 1f
+
+ /* offset is not word-aligned. Handle the first (32 - r10) bits */
+ ld.w r8, r12[0]
+ sub r12, -4
+ lsr r8, r8, r10
+ brne .L_found
+
+ /* r9 = r9 - (32 - r10) = r9 + r10 - 32 */
+ add r9, r10
+ sub r9, 32
+ retle r11
+
+ /* Main loop. offset must be word-aligned */
+1: ld.w r8, r12[0]
+ cp.w r8, 0
+ brne .L_found
+ sub r12, -4
+ sub r9, 32
+ brgt 1b
+ retal r11
+
+ENTRY(find_next_bit_le)
+ lsr r8, r10, 5
+ sub r9, r11, r10
+ retle r11
+
+ lsl r8, 2
+ add r12, r8
+ andl r10, 31, COH
+ breq 1f
+
+ /* offset is not word-aligned. Handle the first (32 - r10) bits */
+ ldswp.w r8, r12[0]
+ sub r12, -4
+ lsr r8, r8, r10
+ brne .L_found
+
+ /* r9 = r9 - (32 - r10) = r9 + r10 - 32 */
+ add r9, r10
+ sub r9, 32
+ retle r11
+
+ /* Main loop. offset must be word-aligned */
+1: ldswp.w r8, r12[0]
+ cp.w r8, 0
+ brne .L_found
+ sub r12, -4
+ sub r9, 32
+ brgt 1b
+ retal r11
+
+ENTRY(find_next_zero_bit_le)
+ lsr r8, r10, 5
+ sub r9, r11, r10
+ retle r11
+
+ lsl r8, 2
+ add r12, r8
+ andl r10, 31, COH
+ breq 1f
+
+ /* offset is not word-aligned. Handle the first (32 - r10) bits */
+ ldswp.w r8, r12[0]
+ sub r12, -4
+ com r8
+ lsr r8, r8, r10
+ brne .L_found
+
+ /* r9 = r9 - (32 - r10) = r9 + r10 - 32 */
+ add r9, r10
+ sub r9, 32
+ retle r11
+
+ /* Main loop. offset must be word-aligned */
+1: ldswp.w r8, r12[0]
+ com r8
+ brne .L_found
+ sub r12, -4
+ sub r9, 32
+ brgt 1b
+ retal r11
diff --git a/kernel/arch/avr32/lib/io-readsb.S b/kernel/arch/avr32/lib/io-readsb.S
new file mode 100644
index 000000000..cb2d86945
--- /dev/null
+++ b/kernel/arch/avr32/lib/io-readsb.S
@@ -0,0 +1,49 @@
+/*
+ * Copyright (C) 2004-2006 Atmel Corporation
+ *
+ * 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.
+ */
+
+ .text
+.Lnot_word_aligned:
+1: ld.ub r8, r12[0]
+ sub r10, 1
+ st.b r11++, r8
+ reteq r12
+ tst r11, r9
+ brne 1b
+
+ /* fall through */
+
+ .global __raw_readsb
+ .type __raw_readsb,@function
+__raw_readsb:
+ cp.w r10, 0
+ mov r9, 3
+ reteq r12
+
+ tst r11, r9
+ brne .Lnot_word_aligned
+
+ sub r10, 4
+ brlt 2f
+
+1: ldins.b r8:t, r12[0]
+ ldins.b r8:u, r12[0]
+ ldins.b r8:l, r12[0]
+ ldins.b r8:b, r12[0]
+ st.w r11++, r8
+ sub r10, 4
+ brge 1b
+
+2: sub r10, -4
+ reteq r12
+
+3: ld.ub r8, r12[0]
+ sub r10, 1
+ st.b r11++, r8
+ brne 3b
+
+ retal r12
diff --git a/kernel/arch/avr32/lib/io-readsl.S b/kernel/arch/avr32/lib/io-readsl.S
new file mode 100644
index 000000000..b103511ed
--- /dev/null
+++ b/kernel/arch/avr32/lib/io-readsl.S
@@ -0,0 +1,24 @@
+/*
+ * Copyright (C) 2004-2006 Atmel Corporation
+ *
+ * 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.
+ */
+
+ .global __raw_readsl
+ .type __raw_readsl,@function
+__raw_readsl:
+ cp.w r10, 0
+ reteq r12
+
+ /*
+ * If r11 isn't properly aligned, we might get an exception on
+ * some implementations. But there's not much we can do about it.
+ */
+1: ld.w r8, r12[0]
+ sub r10, 1
+ st.w r11++, r8
+ brne 1b
+
+ retal r12
diff --git a/kernel/arch/avr32/lib/io-readsw.S b/kernel/arch/avr32/lib/io-readsw.S
new file mode 100644
index 000000000..456be9909
--- /dev/null
+++ b/kernel/arch/avr32/lib/io-readsw.S
@@ -0,0 +1,43 @@
+/*
+ * Copyright (C) 2004-2006 Atmel Corporation
+ *
+ * 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.
+ */
+
+.Lnot_word_aligned:
+ /*
+ * Bad alignment will cause a hardware exception, which is as
+ * good as anything. No need for us to check for proper alignment.
+ */
+ ld.uh r8, r12[0]
+ sub r10, 1
+ st.h r11++, r8
+
+ /* fall through */
+
+ .global __raw_readsw
+ .type __raw_readsw,@function
+__raw_readsw:
+ cp.w r10, 0
+ reteq r12
+ mov r9, 3
+ tst r11, r9
+ brne .Lnot_word_aligned
+
+ sub r10, 2
+ brlt 2f
+
+1: ldins.h r8:t, r12[0]
+ ldins.h r8:b, r12[0]
+ st.w r11++, r8
+ sub r10, 2
+ brge 1b
+
+2: sub r10, -2
+ reteq r12
+
+ ld.uh r8, r12[0]
+ st.h r11++, r8
+ retal r12
diff --git a/kernel/arch/avr32/lib/io-writesb.S b/kernel/arch/avr32/lib/io-writesb.S
new file mode 100644
index 000000000..b4ebaaccc
--- /dev/null
+++ b/kernel/arch/avr32/lib/io-writesb.S
@@ -0,0 +1,52 @@
+/*
+ * Copyright (C) 2004-2006 Atmel Corporation
+ *
+ * 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.
+ */
+
+ .text
+.Lnot_word_aligned:
+1: ld.ub r8, r11++
+ sub r10, 1
+ st.b r12[0], r8
+ reteq r12
+ tst r11, r9
+ brne 1b
+
+ /* fall through */
+
+ .global __raw_writesb
+ .type __raw_writesb,@function
+__raw_writesb:
+ cp.w r10, 0
+ mov r9, 3
+ reteq r12
+
+ tst r11, r9
+ brne .Lnot_word_aligned
+
+ sub r10, 4
+ brlt 2f
+
+1: ld.w r8, r11++
+ bfextu r9, r8, 24, 8
+ st.b r12[0], r9
+ bfextu r9, r8, 16, 8
+ st.b r12[0], r9
+ bfextu r9, r8, 8, 8
+ st.b r12[0], r9
+ st.b r12[0], r8
+ sub r10, 4
+ brge 1b
+
+2: sub r10, -4
+ reteq r12
+
+3: ld.ub r8, r11++
+ sub r10, 1
+ st.b r12[0], r8
+ brne 3b
+
+ retal r12
diff --git a/kernel/arch/avr32/lib/io-writesl.S b/kernel/arch/avr32/lib/io-writesl.S
new file mode 100644
index 000000000..22138b3a1
--- /dev/null
+++ b/kernel/arch/avr32/lib/io-writesl.S
@@ -0,0 +1,20 @@
+/*
+ * Copyright (C) 2004-2006 Atmel Corporation
+ *
+ * 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.
+ */
+
+ .global __raw_writesl
+ .type __raw_writesl,@function
+__raw_writesl:
+ cp.w r10, 0
+ reteq r12
+
+1: ld.w r8, r11++
+ sub r10, 1
+ st.w r12[0], r8
+ brne 1b
+
+ retal r12
diff --git a/kernel/arch/avr32/lib/io-writesw.S b/kernel/arch/avr32/lib/io-writesw.S
new file mode 100644
index 000000000..8c4a53f1c
--- /dev/null
+++ b/kernel/arch/avr32/lib/io-writesw.S
@@ -0,0 +1,38 @@
+/*
+ * Copyright (C) 2004-2006 Atmel Corporation
+ *
+ * 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.
+ */
+
+.Lnot_word_aligned:
+ ld.uh r8, r11++
+ sub r10, 1
+ st.h r12[0], r8
+
+ .global __raw_writesw
+ .type __raw_writesw,@function
+__raw_writesw:
+ cp.w r10, 0
+ mov r9, 3
+ reteq r12
+ tst r11, r9
+ brne .Lnot_word_aligned
+
+ sub r10, 2
+ brlt 2f
+
+1: ld.w r8, r11++
+ bfextu r9, r8, 16, 16
+ st.h r12[0], r9
+ st.h r12[0], r8
+ sub r10, 2
+ brge 1b
+
+2: sub r10, -2
+ reteq r12
+
+ ld.uh r8, r11++
+ st.h r12[0], r8
+ retal r12
diff --git a/kernel/arch/avr32/lib/memcpy.S b/kernel/arch/avr32/lib/memcpy.S
new file mode 100644
index 000000000..c2ca49d70
--- /dev/null
+++ b/kernel/arch/avr32/lib/memcpy.S
@@ -0,0 +1,72 @@
+/*
+ * Copyright (C) 2004-2006 Atmel Corporation
+ *
+ * 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.
+ */
+
+ /*
+ * void *memcpy(void *to, const void *from, unsigned long n)
+ *
+ * This implementation does word-aligned loads in the main loop,
+ * possibly sacrificing alignment of stores.
+ *
+ * Hopefully, in most cases, both "to" and "from" will be
+ * word-aligned to begin with.
+ */
+ .text
+ .global memcpy
+ .type memcpy, @function
+memcpy:
+ mov r9, r11
+ andl r9, 3, COH
+ brne 1f
+
+ /* At this point, "from" is word-aligned */
+2: mov r9, r12
+5: sub r10, 4
+ brlt 4f
+
+3: ld.w r8, r11++
+ sub r10, 4
+ st.w r12++, r8
+ brge 3b
+
+4: neg r10
+ reteq r9
+
+ /* Handle unaligned count */
+ lsl r10, 2
+ add pc, pc, r10
+ ld.ub r8, r11++
+ st.b r12++, r8
+ ld.ub r8, r11++
+ st.b r12++, r8
+ ld.ub r8, r11++
+ st.b r12++, r8
+ retal r9
+
+ /* Handle unaligned "from" pointer */
+1: sub r10, 4
+ movlt r9, r12
+ brlt 4b
+ add r10, r9
+ lsl r9, 2
+ add pc, pc, r9
+ ld.ub r8, r11++
+ st.b r12++, r8
+ ld.ub r8, r11++
+ st.b r12++, r8
+ ld.ub r8, r11++
+ st.b r12++, r8
+ mov r8, r12
+ add pc, pc, r9
+ sub r8, 1
+ nop
+ sub r8, 1
+ nop
+ sub r8, 1
+ nop
+ mov r9, r8
+ rjmp 5b
diff --git a/kernel/arch/avr32/lib/memset.S b/kernel/arch/avr32/lib/memset.S
new file mode 100644
index 000000000..40da32c04
--- /dev/null
+++ b/kernel/arch/avr32/lib/memset.S
@@ -0,0 +1,72 @@
+/*
+ * Copyright (C) 2004-2006 Atmel Corporation
+ *
+ * Based on linux/arch/arm/lib/memset.S
+ * Copyright (C) 1995-2000 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.
+ *
+ * ASM optimised string functions
+ */
+#include <asm/asm.h>
+
+ /*
+ * r12: void *b
+ * r11: int c
+ * r10: size_t len
+ *
+ * Returns b in r12
+ */
+ .text
+ .global memset
+ .type memset, @function
+ .align 5
+memset:
+ mov r9, r12
+ mov r8, r12
+ or r11, r11, r11 << 8
+ andl r9, 3, COH
+ brne 1f
+
+2: or r11, r11, r11 << 16
+ sub r10, 4
+ brlt 5f
+
+ /* Let's do some real work */
+4: st.w r8++, r11
+ sub r10, 4
+ brge 4b
+
+ /*
+ * When we get here, we've got less than 4 bytes to set. r10
+ * might be negative.
+ */
+5: sub r10, -4
+ reteq r12
+
+ /* Fastpath ends here, exactly 32 bytes from memset */
+
+ /* Handle unaligned count or pointer */
+ bld r10, 1
+ brcc 6f
+ st.b r8++, r11
+ st.b r8++, r11
+ bld r10, 0
+ retcc r12
+6: st.b r8++, r11
+ retal r12
+
+ /* Handle unaligned pointer */
+1: sub r10, 4
+ brlt 5b
+ add r10, r9
+ lsl r9, 1
+ add pc, r9
+ st.b r8++, r11
+ st.b r8++, r11
+ st.b r8++, r11
+ rjmp 2b
+
+ .size memset, . - memset
diff --git a/kernel/arch/avr32/lib/strncpy_from_user.S b/kernel/arch/avr32/lib/strncpy_from_user.S
new file mode 100644
index 000000000..72bd50599
--- /dev/null
+++ b/kernel/arch/avr32/lib/strncpy_from_user.S
@@ -0,0 +1,60 @@
+/*
+ * Copy to/from userspace with optional address space checking.
+ *
+ * Copyright 2004-2006 Atmel Corporation
+ *
+ * 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/errno.h>
+
+#include <asm/page.h>
+#include <asm/thread_info.h>
+#include <asm/asm.h>
+
+ /*
+ * long strncpy_from_user(char *dst, const char *src, long count)
+ *
+ * On success, returns the length of the string, not including
+ * the terminating NUL.
+ *
+ * If the string is longer than count, returns count
+ *
+ * If userspace access fails, returns -EFAULT
+ */
+ .text
+ .align 1
+ .global strncpy_from_user
+ .type strncpy_from_user, "function"
+strncpy_from_user:
+ mov r9, -EFAULT
+ branch_if_kernel r8, __strncpy_from_user
+ ret_if_privileged r8, r11, r10, r9
+
+ .global __strncpy_from_user
+ .type __strncpy_from_user, "function"
+__strncpy_from_user:
+ cp.w r10, 0
+ reteq 0
+
+ mov r9, r10
+
+1: ld.ub r8, r11++
+ st.b r12++, r8
+ cp.w r8, 0
+ breq 2f
+ sub r9, 1
+ brne 1b
+
+2: sub r10, r9
+ retal r10
+
+ .section .fixup, "ax"
+ .align 1
+3: mov r12, -EFAULT
+ retal r12
+
+ .section __ex_table, "a"
+ .align 2
+ .long 1b, 3b
diff --git a/kernel/arch/avr32/lib/strnlen_user.S b/kernel/arch/avr32/lib/strnlen_user.S
new file mode 100644
index 000000000..e46f47249
--- /dev/null
+++ b/kernel/arch/avr32/lib/strnlen_user.S
@@ -0,0 +1,67 @@
+/*
+ * Copy to/from userspace with optional address space checking.
+ *
+ * Copyright 2004-2006 Atmel Corporation
+ *
+ * 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 <asm/page.h>
+#include <asm/thread_info.h>
+#include <asm/processor.h>
+#include <asm/asm.h>
+
+ .text
+ .align 1
+ .global strnlen_user
+ .type strnlen_user, "function"
+strnlen_user:
+ branch_if_kernel r8, __strnlen_user
+ sub r8, r11, 1
+ add r8, r12
+ retcs 0
+ brmi adjust_length /* do a closer inspection */
+
+ .global __strnlen_user
+ .type __strnlen_user, "function"
+__strnlen_user:
+ mov r10, r12
+
+10: ld.ub r8, r12++
+ cp.w r8, 0
+ breq 2f
+ sub r11, 1
+ brne 10b
+
+ sub r12, -1
+2: sub r12, r10
+ retal r12
+
+
+ .type adjust_length, "function"
+adjust_length:
+ cp.w r12, 0 /* addr must always be < TASK_SIZE */
+ retmi 0
+
+ pushm lr
+ lddpc lr, _task_size
+ sub r11, lr, r12
+ mov r9, r11
+ call __strnlen_user
+ cp.w r12, r9
+ brgt 1f
+ popm pc
+1: popm pc, r12=0
+
+ .align 2
+_task_size:
+ .long TASK_SIZE
+
+ .section .fixup, "ax"
+ .align 1
+19: retal 0
+
+ .section __ex_table, "a"
+ .align 2
+ .long 10b, 19b