1b020632eSMartin Schwidefsky #ifndef __S390_VDSO_H__ 2b020632eSMartin Schwidefsky #define __S390_VDSO_H__ 3b020632eSMartin Schwidefsky 4b020632eSMartin Schwidefsky /* Default link addresses for the vDSOs */ 5b020632eSMartin Schwidefsky #define VDSO32_LBASE 0 6b020632eSMartin Schwidefsky #define VDSO64_LBASE 0 7b020632eSMartin Schwidefsky 813c6680aSMartin Schwidefsky #define VDSO_VERSION_STRING LINUX_2.6.29 9b020632eSMartin Schwidefsky 10b020632eSMartin Schwidefsky #ifndef __ASSEMBLY__ 11b020632eSMartin Schwidefsky 12b020632eSMartin Schwidefsky /* 13c742b31cSMartin Schwidefsky * Note about the vdso_data and vdso_per_cpu_data structures: 14b020632eSMartin Schwidefsky * 15c742b31cSMartin Schwidefsky * NEVER USE THEM IN USERSPACE CODE DIRECTLY. The layout of the 16b020632eSMartin Schwidefsky * structure is supposed to be known only to the function in the vdso 17b020632eSMartin Schwidefsky * itself and may change without notice. 18b020632eSMartin Schwidefsky */ 19b020632eSMartin Schwidefsky 20b020632eSMartin Schwidefsky struct vdso_data { 21b020632eSMartin Schwidefsky __u64 tb_update_count; /* Timebase atomicity ctr 0x00 */ 22b020632eSMartin Schwidefsky __u64 xtime_tod_stamp; /* TOD clock for xtime 0x08 */ 23b020632eSMartin Schwidefsky __u64 xtime_clock_sec; /* Kernel time 0x10 */ 24b020632eSMartin Schwidefsky __u64 xtime_clock_nsec; /* 0x18 */ 25b7eacb59SMartin Schwidefsky __u64 xtime_coarse_sec; /* Coarse kernel time 0x20 */ 26b7eacb59SMartin Schwidefsky __u64 xtime_coarse_nsec; /* 0x28 */ 27b7eacb59SMartin Schwidefsky __u64 wtom_clock_sec; /* Wall to monotonic clock 0x30 */ 28b7eacb59SMartin Schwidefsky __u64 wtom_clock_nsec; /* 0x38 */ 29b7eacb59SMartin Schwidefsky __u64 wtom_coarse_sec; /* Coarse wall to monotonic 0x40 */ 30b7eacb59SMartin Schwidefsky __u64 wtom_coarse_nsec; /* 0x48 */ 31b7eacb59SMartin Schwidefsky __u32 tz_minuteswest; /* Minutes west of Greenwich 0x50 */ 32b7eacb59SMartin Schwidefsky __u32 tz_dsttime; /* Type of dst correction 0x54 */ 33b7eacb59SMartin Schwidefsky __u32 ectg_available; /* ECTG instruction present 0x58 */ 34b7eacb59SMartin Schwidefsky __u32 tk_mult; /* Mult. used for xtime_nsec 0x5c */ 35b7eacb59SMartin Schwidefsky __u32 tk_shift; /* Shift used for xtime_nsec 0x60 */ 36c742b31cSMartin Schwidefsky }; 37c742b31cSMartin Schwidefsky 38c742b31cSMartin Schwidefsky struct vdso_per_cpu_data { 39c742b31cSMartin Schwidefsky __u64 ectg_timer_base; 40c742b31cSMartin Schwidefsky __u64 ectg_user_time; 41b020632eSMartin Schwidefsky }; 42b020632eSMartin Schwidefsky 43b020632eSMartin Schwidefsky extern struct vdso_data *vdso_data; 44b020632eSMartin Schwidefsky 45c667aeacSHeiko Carstens int vdso_alloc_per_cpu(struct lowcore *lowcore); 46c667aeacSHeiko Carstens void vdso_free_per_cpu(struct lowcore *lowcore); 47c742b31cSMartin Schwidefsky 48b020632eSMartin Schwidefsky #endif /* __ASSEMBLY__ */ 49b020632eSMartin Schwidefsky #endif /* __S390_VDSO_H__ */ 50