sparc/lib/NGcopy_from_user.S

0001 /* SPDX-License-Identifier: GPL-2.0 */
0002 /* NGcopy_from_user.S: Niagara optimized copy from userspace.
0003  *
0004  * Copyright (C) 2006, 2007 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 #ifndef ASI_AIUS
0016 #define ASI_AIUS    0x11
0017 #endif
0018
0019 #define FUNC_NAME       NGcopy_from_user
0020 #define LOAD(type,addr,dest)    type##a [addr] ASI_AIUS, dest
0021 #define LOAD_TWIN(addr_reg,dest0,dest1) \
0022     ldda [addr_reg] ASI_BLK_INIT_QUAD_LDD_AIUS, dest0
0023 #define EX_RETVAL(x)        %g0
0024
0025 #ifdef __KERNEL__
0026 #define PREAMBLE                    \
0027     rd      %asi, %g1;          \
0028     cmp     %g1, ASI_AIUS;          \
0029     bne,pn      %icc, raw_copy_in_user;     \
0030      nop
0031 #endif
0032
0033 #include "NGmemcpy.S"