sparc/lib/U1copy_to_user.S

0001 /* SPDX-License-Identifier: GPL-2.0 */
0002 /* U1copy_to_user.S: UltraSparc-I/II/IIi/IIe optimized copy to userspace.
0003  *
0004  * Copyright (C) 1999, 2000, 2004 David S. Miller (davem@redhat.com)
0005  */
0006
0007 #define EX_ST(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_ST_FP(x,y)       \
0016 98: x;          \
0017     .section __ex_table,"a";\
0018     .align 4;       \
0019     .word 98b, y;       \
0020     .text;          \
0021     .align 4;
0022
0023 #define FUNC_NAME       raw_copy_to_user
0024 #define STORE(type,src,addr)    type##a src, [addr] ASI_AIUS
0025 #define STORE_BLK(src,addr) stda src, [addr] ASI_BLK_AIUS
0026 #define EX_RETVAL(x)        0
0027
0028     /* Writing to %asi is _expensive_ so we hardcode it.
0029      * Reading %asi to check for KERNEL_DS is comparatively
0030      * cheap.
0031      */
0032 #define PREAMBLE                    \
0033     rd      %asi, %g1;          \
0034     cmp     %g1, ASI_AIUS;          \
0035     bne,pn      %icc, raw_copy_in_user;     \
0036      nop;                       \
0037
0038 #include "U1memcpy.S"