sparc/lib/NG4copy_from_user.S

0001 /* SPDX-License-Identifier: GPL-2.0 */
0002 /* NG4copy_from_user.S: Niagara-4 optimized copy from userspace.
0003  *
0004  * Copyright (C) 2012 David S. Miller (davem@davemloft.net)
0005  */
0006
0007 #define EX_LD(x, y)     \
0008 98: x;          \
0009     .section __ex_table,"a";\
0010     .align 4;       \
0011     .word 98b, y;       \
0012     .text;          \
0013     .align 4;
0014
0015 #define EX_LD_FP(x,y)       \
0016 98: x;          \
0017     .section __ex_table,"a";\
0018     .align 4;       \
0019     .word 98b, y##_fp;  \
0020     .text;          \
0021     .align 4;
0022
0023 #ifndef ASI_AIUS
0024 #define ASI_AIUS    0x11
0025 #endif
0026
0027 #define FUNC_NAME       NG4copy_from_user
0028 #define LOAD(type,addr,dest)    type##a [addr] %asi, dest
0029 #define EX_RETVAL(x)        0
0030
0031 #ifdef __KERNEL__
0032 #define PREAMBLE                    \
0033     rd      %asi, %g1;          \
0034     cmp     %g1, ASI_AIUS;          \
0035     bne,pn      %icc, raw_copy_in_user;     \
0036      nop
0037 #endif
0038
0039 #include "NG4memcpy.S"