| /* SPDX-License-Identifier: GPL-2.0 */ |
| #ifndef __S390_VDSO_H__ |
| #define __S390_VDSO_H__ |
| |
| /* Default link addresses for the vDSOs */ |
| #define VDSO32_LBASE 0 |
| #define VDSO64_LBASE 0 |
| |
| #define VDSO_VERSION_STRING LINUX_2.6.29 |
| |
| #ifndef __ASSEMBLY__ |
| |
| /* |
| * Note about the vdso_data and vdso_per_cpu_data structures: |
| * |
| * NEVER USE THEM IN USERSPACE CODE DIRECTLY. The layout of the |
| * structure is supposed to be known only to the function in the vdso |
| * itself and may change without notice. |
| */ |
| |
| struct vdso_data { |
| __u64 tb_update_count; /* Timebase atomicity ctr 0x00 */ |
| __u64 xtime_tod_stamp; /* TOD clock for xtime 0x08 */ |
| __u64 xtime_clock_sec; /* Kernel time 0x10 */ |
| __u64 xtime_clock_nsec; /* 0x18 */ |
| __u64 xtime_coarse_sec; /* Coarse kernel time 0x20 */ |
| __u64 xtime_coarse_nsec; /* 0x28 */ |
| __u64 wtom_clock_sec; /* Wall to monotonic clock 0x30 */ |
| __u64 wtom_clock_nsec; /* 0x38 */ |
| __u64 wtom_coarse_sec; /* Coarse wall to monotonic 0x40 */ |
| __u64 wtom_coarse_nsec; /* 0x48 */ |
| __u32 tz_minuteswest; /* Minutes west of Greenwich 0x50 */ |
| __u32 tz_dsttime; /* Type of dst correction 0x54 */ |
| __u32 ectg_available; /* ECTG instruction present 0x58 */ |
| __u32 tk_mult; /* Mult. used for xtime_nsec 0x5c */ |
| __u32 tk_shift; /* Shift used for xtime_nsec 0x60 */ |
| __u32 ts_dir; /* TOD steering direction 0x64 */ |
| __u64 ts_end; /* TOD steering end 0x68 */ |
| }; |
| |
| struct vdso_per_cpu_data { |
| __u64 ectg_timer_base; |
| __u64 ectg_user_time; |
| __u32 cpu_nr; |
| __u32 node_id; |
| }; |
| |
| extern struct vdso_data *vdso_data; |
| extern struct vdso_data boot_vdso_data; |
| |
| void vdso_alloc_boot_cpu(struct lowcore *lowcore); |
| int vdso_alloc_per_cpu(struct lowcore *lowcore); |
| void vdso_free_per_cpu(struct lowcore *lowcore); |
| |
| #endif /* __ASSEMBLY__ */ |
| #endif /* __S390_VDSO_H__ */ |
