tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
22static 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 */
31static 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