| xj | b04a402 | 2021-11-25 15:01:52 +0800 | [diff] [blame^] | 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 |