diff options
| author | Vineet Gupta <vgupta@synopsys.com> | 2016-10-31 21:09:34 +0300 |
|---|---|---|
| committer | Vineet Gupta <vgupta@synopsys.com> | 2016-11-30 22:54:25 +0300 |
| commit | c33a605dd6f36618f9f658e71c09fcdcb44fc500 (patch) | |
| tree | ac77c51dbe5bf8a8498600ca4da4cb4f46fc6656 /include/soc/arc | |
| parent | 92b03314033c0d36ef3a5e68ccdc65ad2a4d17c5 (diff) | |
| download | linux-c33a605dd6f36618f9f658e71c09fcdcb44fc500.tar.xz | |
ARC: breakout aux handling into a separate header
ARC timers use aux registers for programming and this paves way for
moving ARC timer drivers into drivers/clocksource
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Diffstat (limited to 'include/soc/arc')
| -rw-r--r-- | include/soc/arc/aux.h | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/include/soc/arc/aux.h b/include/soc/arc/aux.h new file mode 100644 index 000000000000..8c3fb13e0452 --- /dev/null +++ b/include/soc/arc/aux.h @@ -0,0 +1,63 @@ +/* + * Copyright (C) 2016-2017 Synopsys, Inc. (www.synopsys.com) + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + */ + +#ifndef __SOC_ARC_AUX_H__ +#define __SOC_ARC_AUX_H__ + +#ifdef CONFIG_ARC + +#define read_aux_reg(r) __builtin_arc_lr(r) + +/* gcc builtin sr needs reg param to be long immediate */ +#define write_aux_reg(r, v) __builtin_arc_sr((unsigned int)(v), r) + +#else /* !CONFIG_ARC */ + +static inline int read_aux_reg(u32 r) +{ + return 0; +} + +/* + * function helps elide unused variable warning + * see: http://lists.infradead.org/pipermail/linux-snps-arc/2016-November/001748.html + */ +static inline void write_aux_reg(u32 r, u32 v) +{ + ; +} + +#endif + +#define READ_BCR(reg, into) \ +{ \ + unsigned int tmp; \ + tmp = read_aux_reg(reg); \ + if (sizeof(tmp) == sizeof(into)) { \ + into = *((typeof(into) *)&tmp); \ + } else { \ + extern void bogus_undefined(void); \ + bogus_undefined(); \ + } \ +} + +#define WRITE_AUX(reg, into) \ +{ \ + unsigned int tmp; \ + if (sizeof(tmp) == sizeof(into)) { \ + tmp = (*(unsigned int *)&(into)); \ + write_aux_reg(reg, tmp); \ + } else { \ + extern void bogus_undefined(void); \ + bogus_undefined(); \ + } \ +} + + +#endif |