1 /* SPDX-License-Identifier: GPL-2.0 */ 1 /* SPDX-License-Identifier: GPL-2.0 */
2 /* U1copy_from_user.S: UltraSparc-I/II/IIi/IIe 2 /* U1copy_from_user.S: UltraSparc-I/II/IIi/IIe optimized copy from userspace.
3 * 3 *
4 * Copyright (C) 1999, 2000, 2004 David S. Mil 4 * Copyright (C) 1999, 2000, 2004 David S. Miller (davem@redhat.com)
5 */ 5 */
6 6
7 #define EX_LD(x,y) \ 7 #define EX_LD(x,y) \
8 98: x; \ 8 98: x; \
9 .section __ex_table,"a";\ 9 .section __ex_table,"a";\
10 .align 4; \ 10 .align 4; \
11 .word 98b, y; \ 11 .word 98b, y; \
12 .text; \ 12 .text; \
13 .align 4; 13 .align 4;
14 14
15 #define EX_LD_FP(x,y) \ 15 #define EX_LD_FP(x,y) \
16 98: x; \ 16 98: x; \
17 .section __ex_table,"a";\ 17 .section __ex_table,"a";\
18 .align 4; \ 18 .align 4; \
19 .word 98b, y; \ 19 .word 98b, y; \
20 .text; \ 20 .text; \
21 .align 4; 21 .align 4;
22 22
23 #define FUNC_NAME raw_copy_from_ 23 #define FUNC_NAME raw_copy_from_user
24 #define LOAD(type,addr,dest) type##a [addr] 24 #define LOAD(type,addr,dest) type##a [addr] %asi, dest
25 #define LOAD_BLK(addr,dest) ldda [addr] AS 25 #define LOAD_BLK(addr,dest) ldda [addr] ASI_BLK_AIUS, dest
26 #define EX_RETVAL(x) 0 26 #define EX_RETVAL(x) 0
27 27
28 /* Writing to %asi is _expensive_ so w 28 /* Writing to %asi is _expensive_ so we hardcode it.
29 * Reading %asi to check for KERNEL_DS 29 * Reading %asi to check for KERNEL_DS is comparatively
30 * cheap. 30 * cheap.
31 */ 31 */
32 #define PREAMBLE 32 #define PREAMBLE \
33 rd %asi, %g1; 33 rd %asi, %g1; \
34 cmp %g1, ASI_AIUS; 34 cmp %g1, ASI_AIUS; \
35 bne,pn %icc, raw_copy_in_user 35 bne,pn %icc, raw_copy_in_user; \
36 nop; 36 nop; \
37 37
38 #include "U1memcpy.S" 38 #include "U1memcpy.S"
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