diff options
Diffstat (limited to 'kernel/arch/sparc/lib/NG2copy_from_user.S')
| -rw-r--r-- | kernel/arch/sparc/lib/NG2copy_from_user.S | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/kernel/arch/sparc/lib/NG2copy_from_user.S b/kernel/arch/sparc/lib/NG2copy_from_user.S new file mode 100644 index 000000000..119ccb9a5 --- /dev/null +++ b/kernel/arch/sparc/lib/NG2copy_from_user.S @@ -0,0 +1,35 @@ +/* NG2copy_from_user.S: Niagara-2 optimized copy from userspace. + * + * Copyright (C) 2007 David S. Miller (davem@davemloft.net) + */ + +#define EX_LD(x) \ +98: x; \ + .section __ex_table,"a";\ + .align 4; \ + .word 98b, __retl_one_asi;\ + .text; \ + .align 4; + +#ifndef ASI_AIUS +#define ASI_AIUS 0x11 +#endif + +#ifndef ASI_BLK_AIUS_4V +#define ASI_BLK_AIUS_4V 0x17 +#endif + +#define FUNC_NAME NG2copy_from_user +#define LOAD(type,addr,dest) type##a [addr] %asi, dest +#define LOAD_BLK(addr,dest) ldda [addr] ASI_BLK_AIUS_4V, dest +#define EX_RETVAL(x) 0 + +#ifdef __KERNEL__ +#define PREAMBLE \ + rd %asi, %g1; \ + cmp %g1, ASI_AIUS; \ + bne,pn %icc, ___copy_in_user; \ + nop +#endif + +#include "NG2memcpy.S" |