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/m32r/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/m32r/lib/memcpy.S')
| -rw-r--r-- | kernel/arch/m32r/lib/memcpy.S | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/kernel/arch/m32r/lib/memcpy.S b/kernel/arch/m32r/lib/memcpy.S new file mode 100644 index 000000000..05987cd63 --- /dev/null +++ b/kernel/arch/m32r/lib/memcpy.S @@ -0,0 +1,92 @@ +/* + * linux/arch/m32r/lib/memcpy.S + * + * Copyright (C) 2001 Hiroyuki Kondo, and Hirokazu Takata + * Copyright (C) 2004 Hirokazu Takata + * + * void *memcopy(void *dst, const void *src, int n); + * + * dst: r0 + * src: r1 + * n : r2 + */ + + .text +#include <linux/linkage.h> +#include <asm/assembler.h> + +#ifdef CONFIG_ISA_DUAL_ISSUE + + .text +ENTRY(memcpy) +memcopy: + mv r4, r0 || mv r7, r0 + or r7, r1 || cmpz r2 + jc r14 || cmpeq r0, r1 ; return if r2=0 + jc r14 ; return if r0=r1 + + and3 r7, r7, #3 + bnez r7, byte_copy + srl3 r3, r2, #2 + and3 r2, r2, #3 + beqz r3, byte_copy + addi r4, #-4 +word_copy: + ld r7, @r1+ || addi r3, #-1 + st r7, @+r4 || cmpz r2 + bnez r3, word_copy + addi r4, #4 || jc r14 ; return if r2=0 +#if defined(CONFIG_ISA_M32R2) +byte_copy: + ldb r7, @r1 || addi r1, #1 + addi r2, #-1 || stb r7, @r4+ + bnez r2, byte_copy +#elif defined(CONFIG_ISA_M32R) +byte_copy: + ldb r7, @r1 || addi r1, #1 + addi r2, #-1 || stb r7, @r4 + addi r4, #1 + bnez r2, byte_copy +#else +#error unknown isa configuration +#endif +end_memcopy: + jmp r14 + +#else /* not CONFIG_ISA_DUAL_ISSUE */ + + .text +ENTRY(memcpy) +memcopy: + mv r4, r0 + mv r7, r0 + or r7, r1 + beq r0, r1, end_memcopy + beqz r2, end_memcopy + + and3 r7, r7, #3 + bnez r7, byte_copy + srl3 r3, r2, #2 + and3 r2, r2, #3 + beqz r3, byte_copy + addi r4, #-4 +word_copy: + ld r7, @r1+ + addi r3, #-1 + st r7, @+r4 + bnez r3, word_copy + beqz r2, end_memcopy + addi r4, #4 +byte_copy: + ldb r7, @r1 + addi r1, #1 + addi r2, #-1 + stb r7, @r4 + addi r4, #1 + bnez r2, byte_copy +end_memcopy: + jmp r14 + +#endif /* not CONFIG_ISA_DUAL_ISSUE */ + + .end |