From 9dc06ccf4699db81b88a6ff45a8acefd6c278327 Mon Sep 17 00:00:00 2001 From: Martin Schwidefsky Date: Tue, 31 May 2016 09:23:37 +0200 Subject: s390/time: move PTFF definitions The PTFF instruction is not a function of ETR, rename and move the PTFF definitions from etr.h to timex.h. Signed-off-by: Martin Schwidefsky --- arch/s390/include/asm/timex.h | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) (limited to 'arch/s390/include/asm/timex.h') diff --git a/arch/s390/include/asm/timex.h b/arch/s390/include/asm/timex.h index dcb6312a0b91..920db0a2496b 100644 --- a/arch/s390/include/asm/timex.h +++ b/arch/s390/include/asm/timex.h @@ -52,6 +52,39 @@ static inline void store_clock_comparator(__u64 *time) void clock_comparator_work(void); +/* Function codes for the ptff instruction. */ +#define PTFF_QAF 0x00 /* query available functions */ +#define PTFF_QTO 0x01 /* query tod offset */ +#define PTFF_QSI 0x02 /* query steering information */ +#define PTFF_ATO 0x40 /* adjust tod offset */ +#define PTFF_STO 0x41 /* set tod offset */ +#define PTFF_SFS 0x42 /* set fine steering rate */ +#define PTFF_SGS 0x43 /* set gross steering rate */ + +/* Query TOD offset result */ +struct ptff_qto { + unsigned long long physical_clock; + unsigned long long tod_offset; + unsigned long long logical_tod_offset; + unsigned long long tod_epoch_difference; +} __packed; + +static inline int ptff(void *ptff_block, size_t len, unsigned int func) +{ + typedef struct { char _[len]; } addrtype; + register unsigned int reg0 asm("0") = func; + register unsigned long reg1 asm("1") = (unsigned long) ptff_block; + int rc; + + asm volatile( + " .word 0x0104\n" + " ipm %0\n" + " srl %0,28\n" + : "=d" (rc), "+m" (*(addrtype *) ptff_block) + : "d" (reg0), "d" (reg1) : "cc"); + return rc; +} + static inline unsigned long long local_tick_disable(void) { unsigned long long old; -- cgit v1.2.3-59-g8ed1b