diff options
Diffstat (limited to 'arch/sparc/lib/NG4copy_from_user.S')
| -rw-r--r-- | arch/sparc/lib/NG4copy_from_user.S | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/arch/sparc/lib/NG4copy_from_user.S b/arch/sparc/lib/NG4copy_from_user.S new file mode 100644 index 000000000..0cac15a6d --- /dev/null +++ b/arch/sparc/lib/NG4copy_from_user.S @@ -0,0 +1,39 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* NG4copy_from_user.S: Niagara-4 optimized copy from userspace. + * + * Copyright (C) 2012 David S. Miller (davem@davemloft.net) + */ + +#define EX_LD(x, y) \ +98: x; \ + .section __ex_table,"a";\ + .align 4; \ + .word 98b, y; \ + .text; \ + .align 4; + +#define EX_LD_FP(x,y) \ +98: x; \ + .section __ex_table,"a";\ + .align 4; \ + .word 98b, y##_fp; \ + .text; \ + .align 4; + +#ifndef ASI_AIUS +#define ASI_AIUS 0x11 +#endif + +#define FUNC_NAME NG4copy_from_user +#define LOAD(type,addr,dest) type##a [addr] %asi, dest +#define EX_RETVAL(x) 0 + +#ifdef __KERNEL__ +#define PREAMBLE \ + rd %asi, %g1; \ + cmp %g1, ASI_AIUS; \ + bne,pn %icc, raw_copy_in_user; \ + nop +#endif + +#include "NG4memcpy.S" |