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review.shift-gmbh.com / SHIFTPHONES / mainline / linux / 3027a37c06be364e6443d3df3adf45576fba50cb / . / arch / sparc / lib / M7copy_to_user.S
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Babu Mogerb3a04ed2017-08-07 17:52:51 -0600[diff] [blame]1/*
2 * M7copy_to_user.S: SPARC M7 optimized copy to userspace.
3 *
4 * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
5 */
6
7
Babu Moger34060b82017-08-07 17:52:52 -0600[diff] [blame]8#define EX_ST(x, y) \
Babu Mogerb3a04ed2017-08-07 17:52:51 -0600[diff] [blame]998: x; \
10 .section __ex_table,"a"; \
11 .align 4; \
Babu Moger34060b82017-08-07 17:52:52 -0600[diff] [blame]12 .word 98b, y; \
Babu Mogerb3a04ed2017-08-07 17:52:51 -0600[diff] [blame]13 .text; \
14 .align 4;
15
Babu Moger34060b82017-08-07 17:52:52 -0600[diff] [blame]16#define EX_ST_FP(x, y) \
Babu Mogerb3a04ed2017-08-07 17:52:51 -0600[diff] [blame]1798: x; \
18 .section __ex_table,"a"; \
19 .align 4; \
Babu Moger34060b82017-08-07 17:52:52 -0600[diff] [blame]20 .word 98b, y##_fp; \
Babu Mogerb3a04ed2017-08-07 17:52:51 -0600[diff] [blame]21 .text; \
22 .align 4;
23
24
25#ifndef ASI_AIUS
26#define ASI_AIUS 0x11
27#endif
28
29#ifndef ASI_BLK_INIT_QUAD_LDD_AIUS
30#define ASI_BLK_INIT_QUAD_LDD_AIUS 0x23
31#endif
32
33#define FUNC_NAME M7copy_to_user
34#define STORE(type,src,addr) type##a src, [addr] %asi
35#define STORE_ASI ASI_BLK_INIT_QUAD_LDD_AIUS
36#define STORE_MRU_ASI ASI_ST_BLKINIT_MRU_S
37#define EX_RETVAL(x) 0
38
39#ifdef __KERNEL__
40 /* Writing to %asi is _expensive_ so we hardcode it.
41 * Reading %asi to check for KERNEL_DS is comparatively
42 * cheap.
43 */
44#define PREAMBLE \
45 rd %asi, %g1; \
46 cmp %g1, ASI_AIUS; \
47 bne,pn %icc, raw_copy_in_user; \
Babu Moger34060b82017-08-07 17:52:52 -0600[diff] [blame]48 nop
Babu Mogerb3a04ed2017-08-07 17:52:51 -0600[diff] [blame]49#endif
50
51#include "M7memcpy.S"