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c33a605d VG |
1 | /* |
2 | * Copyright (C) 2016-2017 Synopsys, Inc. (www.synopsys.com) | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License version 2 as | |
6 | * published by the Free Software Foundation. | |
7 | * | |
8 | */ | |
9 | ||
10 | #ifndef __SOC_ARC_AUX_H__ | |
11 | #define __SOC_ARC_AUX_H__ | |
12 | ||
13 | #ifdef CONFIG_ARC | |
14 | ||
15 | #define read_aux_reg(r) __builtin_arc_lr(r) | |
16 | ||
17 | /* gcc builtin sr needs reg param to be long immediate */ | |
18 | #define write_aux_reg(r, v) __builtin_arc_sr((unsigned int)(v), r) | |
19 | ||
20 | #else /* !CONFIG_ARC */ | |
21 | ||
22 | static inline int read_aux_reg(u32 r) | |
23 | { | |
24 | return 0; | |
25 | } | |
26 | ||
27 | /* | |
28 | * function helps elide unused variable warning | |
29 | * see: http://lists.infradead.org/pipermail/linux-snps-arc/2016-November/001748.html | |
30 | */ | |
31 | static inline void write_aux_reg(u32 r, u32 v) | |
32 | { | |
33 | ; | |
34 | } | |
35 | ||
36 | #endif | |
37 | ||
38 | #define READ_BCR(reg, into) \ | |
39 | { \ | |
40 | unsigned int tmp; \ | |
41 | tmp = read_aux_reg(reg); \ | |
42 | if (sizeof(tmp) == sizeof(into)) { \ | |
43 | into = *((typeof(into) *)&tmp); \ | |
44 | } else { \ | |
45 | extern void bogus_undefined(void); \ | |
46 | bogus_undefined(); \ | |
47 | } \ | |
48 | } | |
49 | ||
50 | #define WRITE_AUX(reg, into) \ | |
51 | { \ | |
52 | unsigned int tmp; \ | |
53 | if (sizeof(tmp) == sizeof(into)) { \ | |
54 | tmp = (*(unsigned int *)&(into)); \ | |
55 | write_aux_reg(reg, tmp); \ | |
56 | } else { \ | |
57 | extern void bogus_undefined(void); \ | |
58 | bogus_undefined(); \ | |
59 | } \ | |
60 | } | |
61 | ||
62 | ||
63 | #endif |