| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame^] | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 2 | #ifndef __S390_VDSO_H__ |
| 3 | #define __S390_VDSO_H__ |
| 4 | |
| 5 | /* Default link addresses for the vDSOs */ |
| 6 | #define VDSO32_LBASE 0 |
| 7 | #define VDSO64_LBASE 0 |
| 8 | |
| 9 | #define VDSO_VERSION_STRING LINUX_2.6.29 |
| 10 | |
| 11 | #ifndef __ASSEMBLY__ |
| 12 | |
| 13 | /* |
| 14 | * Note about the vdso_data and vdso_per_cpu_data structures: |
| 15 | * |
| 16 | * NEVER USE THEM IN USERSPACE CODE DIRECTLY. The layout of the |
| 17 | * structure is supposed to be known only to the function in the vdso |
| 18 | * itself and may change without notice. |
| 19 | */ |
| 20 | |
| 21 | struct vdso_data { |
| 22 | __u64 tb_update_count; /* Timebase atomicity ctr 0x00 */ |
| 23 | __u64 xtime_tod_stamp; /* TOD clock for xtime 0x08 */ |
| 24 | __u64 xtime_clock_sec; /* Kernel time 0x10 */ |
| 25 | __u64 xtime_clock_nsec; /* 0x18 */ |
| 26 | __u64 xtime_coarse_sec; /* Coarse kernel time 0x20 */ |
| 27 | __u64 xtime_coarse_nsec; /* 0x28 */ |
| 28 | __u64 wtom_clock_sec; /* Wall to monotonic clock 0x30 */ |
| 29 | __u64 wtom_clock_nsec; /* 0x38 */ |
| 30 | __u64 wtom_coarse_sec; /* Coarse wall to monotonic 0x40 */ |
| 31 | __u64 wtom_coarse_nsec; /* 0x48 */ |
| 32 | __u32 tz_minuteswest; /* Minutes west of Greenwich 0x50 */ |
| 33 | __u32 tz_dsttime; /* Type of dst correction 0x54 */ |
| 34 | __u32 ectg_available; /* ECTG instruction present 0x58 */ |
| 35 | __u32 tk_mult; /* Mult. used for xtime_nsec 0x5c */ |
| 36 | __u32 tk_shift; /* Shift used for xtime_nsec 0x60 */ |
| 37 | __u32 ts_dir; /* TOD steering direction 0x64 */ |
| 38 | __u64 ts_end; /* TOD steering end 0x68 */ |
| 39 | }; |
| 40 | |
| 41 | struct vdso_per_cpu_data { |
| 42 | __u64 ectg_timer_base; |
| 43 | __u64 ectg_user_time; |
| 44 | __u32 cpu_nr; |
| 45 | __u32 node_id; |
| 46 | }; |
| 47 | |
| 48 | extern struct vdso_data *vdso_data; |
| 49 | extern struct vdso_data boot_vdso_data; |
| 50 | |
| 51 | void vdso_alloc_boot_cpu(struct lowcore *lowcore); |
| 52 | int vdso_alloc_per_cpu(struct lowcore *lowcore); |
| 53 | void vdso_free_per_cpu(struct lowcore *lowcore); |
| 54 | |
| 55 | #endif /* __ASSEMBLY__ */ |
| 56 | #endif /* __S390_VDSO_H__ */ |