Chris Metcalf | 4a556f4 | 2013-08-07 15:33:32 -0400 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2012 Tilera Corporation. All Rights Reserved. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of the GNU General Public License |
| 6 | * as published by the Free Software Foundation, version 2. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, but |
| 9 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or |
| 11 | * NON INFRINGEMENT. See the GNU General Public License for |
| 12 | * more details. |
| 13 | */ |
| 14 | |
| 15 | #ifndef __TILE_VDSO_H__ |
| 16 | #define __TILE_VDSO_H__ |
| 17 | |
Chris Metcalf | 94fb1af | 2014-10-02 10:48:12 -0400 | [diff] [blame] | 18 | #include <linux/seqlock.h> |
Chris Metcalf | 4a556f4 | 2013-08-07 15:33:32 -0400 | [diff] [blame] | 19 | #include <linux/types.h> |
| 20 | |
| 21 | /* |
| 22 | * Note about the vdso_data structure: |
| 23 | * |
| 24 | * NEVER USE THEM IN USERSPACE CODE DIRECTLY. The layout of the |
| 25 | * structure is supposed to be known only to the function in the vdso |
| 26 | * itself and may change without notice. |
| 27 | */ |
| 28 | |
| 29 | struct vdso_data { |
Chris Metcalf | 94fb1af | 2014-10-02 10:48:12 -0400 | [diff] [blame] | 30 | seqcount_t tz_seq; /* Timezone seqlock */ |
| 31 | seqcount_t tb_seq; /* Timebase seqlock */ |
Chris Metcalf | 78410af | 2014-10-02 10:32:15 -0400 | [diff] [blame] | 32 | __u64 cycle_last; /* TOD clock for xtime */ |
| 33 | __u64 mask; /* Cycle mask */ |
Chris Metcalf | 4a556f4 | 2013-08-07 15:33:32 -0400 | [diff] [blame] | 34 | __u32 mult; /* Cycle to nanosecond multiplier */ |
| 35 | __u32 shift; /* Cycle to nanosecond divisor (power of two) */ |
Chris Metcalf | 78410af | 2014-10-02 10:32:15 -0400 | [diff] [blame] | 36 | __u64 wall_time_sec; |
| 37 | __u64 wall_time_snsec; |
| 38 | __u64 monotonic_time_sec; |
| 39 | __u64 monotonic_time_snsec; |
| 40 | __u64 wall_time_coarse_sec; |
| 41 | __u64 wall_time_coarse_nsec; |
| 42 | __u64 monotonic_time_coarse_sec; |
| 43 | __u64 monotonic_time_coarse_nsec; |
Chris Metcalf | 4a556f4 | 2013-08-07 15:33:32 -0400 | [diff] [blame] | 44 | __u32 tz_minuteswest; /* Minutes west of Greenwich */ |
| 45 | __u32 tz_dsttime; /* Type of dst correction */ |
| 46 | }; |
| 47 | |
| 48 | extern struct vdso_data *vdso_data; |
| 49 | |
| 50 | /* __vdso_rt_sigreturn is defined with the addresses in the vdso page. */ |
| 51 | extern void __vdso_rt_sigreturn(void); |
| 52 | |
| 53 | extern int setup_vdso_pages(void); |
| 54 | |
| 55 | #endif /* __TILE_VDSO_H__ */ |