diff options
| author |   Yunhong Jiang <yunhong.jiang@intel.com> | 2015-08-04 12:17:53 -0700 |
|---|---|---|
| committer | Yunhong Jiang <yunhong.jiang@intel.com> | 2015-08-04 15:44:42 -0700 |
| commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
| tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/arch/avr32/lib/memcpy.S | |
| parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (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/memcpy.S')
| -rw-r--r-- | kernel/arch/avr32/lib/memcpy.S | 72 |
1 files changed, 72 insertions, 0 deletions
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 |