/* SPDX-License-Identifier: GPL-2.0 */ /* * S390 version * Copyright IBM Corp. 1999 * * Derived from "include/asm-i386/timex.h" * Copyright (C) 1992, Linus Torvalds */ #ifndef _ASM_S390_TIMEX_H #define _ASM_S390_TIMEX_H #include <linux/preempt.h> #include <linux/time64.h> #include <asm/lowcore.h> /* The value of the TOD clock for 1.1.1970. */ #define TOD_UNIX_EPOCH 0x7d91048bca000000ULL extern u64 clock_comparator_max; /* Inline functions for clock register access. */ static inline int set_tod_clock(__u64 time) { int cc; asm volatile( " sck %1\n" " ipm %0\n" " srl %0,28\n" : "=d" (cc) : "Q" (time) : "cc"); return cc; } static inline int store_tod_clock(__u64 *time) { int cc; asm volatile( " stck %1\n" " ipm %0\n" " srl %0,28\n" : "=d" (cc), "=Q" (*time) : : "cc"); return cc; } static inline void set_clock_comparator(__u64 time) { asm volatile("sckc %0" : : "Q" (time)); } static inline void store_clock_comparator(__u64 *time) { asm volatile("stckc %0" : "=Q" (*time)); } void clock_comparator_work(void); void __init time_early_init(void); extern unsigned char ptff_function_mask[16]; /* 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_QUI 0x04 /* query UTC 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_query(unsigned int nr) { unsigned char *ptr; ptr = ptff_function_mask + (nr >> 3); return (*ptr & (0x80 >> (nr & 7))) != 0; } /* Query UTC information result */ struct ptff_qui { unsigned int tm : 2; unsigned int ts : 2; unsigned int : 28; unsigned int pad_0x04; unsigned long leap_event; short old_leap; short new_leap; unsigned int pad_0x14; unsigned long prt[5]; unsigned long cst[3]; unsigned int skew; unsigned int pad_0x5c[41]; } __packed; /* * ptff - Perform timing facility function * @ptff_block: Pointer to ptff parameter block * @len: Length of parameter block * @func: Function code * Returns: Condition code (0 on success) */ #define ptff(ptff_block, len, func) \ ({ \ struct addrtype { char _[len]; }; \ 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" (*(struct addrtype *) reg1) \ : "d" (reg0), "d" (reg1) : "cc"); \ rc; \ }) static inline unsigned long long local_tick_disable(void) { unsigned long long old; old = S390_lowcore.clock_comparator; S390_lowcore.clock_comparator = clock_comparator_max; set_clock_comparator(S390_lowcore.clock_comparator); return old; } static inline void local_tick_enable(unsigned long long comp) { S390_lowcore.clock_comparator = comp; set_clock_comparator(S390_lowcore.clock_comparator); } #define CLOCK_TICK_RATE 1193180 /* Underlying HZ */ #define STORE_CLOCK_EXT_SIZE 16 /* stcke writes 16 bytes */ typedef unsigned long long cycles_t; static inline void get_tod_clock_ext(char *clk) { typedef struct { char _[STORE_CLOCK_EXT_SIZE]; } addrtype; asm volatile("stcke %0" : "=Q" (*(addrtype *) clk) : : "cc"); } static inline unsigned long long get_tod_clock(void) { char clk[STORE_CLOCK_EXT_SIZE]; get_tod_clock_ext(clk); return *((unsigned long long *)&clk[1]); } static inline unsigned long long get_tod_clock_fast(void) { #ifdef CONFIG_HAVE_MARCH_Z9_109_FEATURES unsigned long long clk; asm volatile("stckf %0" : "=Q" (clk) : : "cc"); return clk; #else return get_tod_clock(); #endif } static inline cycles_t get_cycles(void) { return (cycles_t) get_tod_clock() >> 2; } #define get_cycles get_cycles int get_phys_clock(unsigned long *clock); void init_cpu_timer(void); unsigned long long monotonic_clock(void); extern unsigned char tod_clock_base[16] __aligned(8); /** * get_clock_monotonic - returns current time in clock rate units * * The clock and tod_clock_base get changed via stop_machine. * Therefore preemption must be disabled, otherwise the returned * value is not guaranteed to be monotonic. */ static inline unsigned long long get_tod_clock_monotonic(void) { unsigned long long tod; preempt_disable_notrace(); tod = get_tod_clock() - *(unsigned long long *) &tod_clock_base[1]; preempt_enable_notrace(); return tod; } /** * tod_to_ns - convert a TOD format value to nanoseconds * @todval: to be converted TOD format value * Returns: number of nanoseconds that correspond to the TOD format value * * Converting a 64 Bit TOD format value to nanoseconds means that the value * must be divided by 4.096. In order to achieve that we multiply with 125 * and divide by 512: * * ns = (todval * 125) >> 9; * * In order to avoid an overflow with the multiplication we can rewrite this. * With a split todval == 2^9 * th + tl (th upper 55 bits, tl lower 9 bits) * we end up with * * ns = ((2^9 * th + tl) * 125 ) >> 9; * -> ns = (th * 125) + ((tl * 125) >> 9); * */ static inline unsigned long long tod_to_ns(unsigned long long todval) { return ((todval >> 9) * 125) + (((todval & 0x1ff) * 125) >> 9); } /** * tod_after - compare two 64 bit TOD values * @a: first 64 bit TOD timestamp * @b: second 64 bit TOD timestamp * * Returns: true if a is later than b */ static inline int tod_after(unsigned long long a, unsigned long long b) { if (MACHINE_HAS_SCC) return (long long) a > (long long) b; return a > b; } /** * tod_after_eq - compare two 64 bit TOD values * @a: first 64 bit TOD timestamp * @b: second 64 bit TOD timestamp * * Returns: true if a is later than b */ static inline int tod_after_eq(unsigned long long a, unsigned long long b) { if (MACHINE_HAS_SCC) return (long long) a >= (long long) b; return a >= b; } #endif
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fpu | Folder | 0755 |
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trace | Folder | 0755 |
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Kbuild | File | 557 B | 0644 |
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airq.h | File | 3.02 KB | 0644 |
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alternative-asm.h | File | 3.07 KB | 0644 |
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alternative.h | File | 4.99 KB | 0644 |
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ap.h | File | 9.9 KB | 0644 |
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appldata.h | File | 1.54 KB | 0644 |
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archrandom.h | File | 1.1 KB | 0644 |
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asm-prototypes.h | File | 227 B | 0644 |
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atomic.h | File | 5.1 KB | 0644 |
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atomic_ops.h | File | 4.02 KB | 0644 |
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barrier.h | File | 1.84 KB | 0644 |
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bitops.h | File | 10.13 KB | 0644 |
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bug.h | File | 1.49 KB | 0644 |
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bugs.h | File | 441 B | 0644 |
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cache.h | File | 387 B | 0644 |
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ccwdev.h | File | 7.99 KB | 0644 |
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ccwgroup.h | File | 2.53 KB | 0644 |
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checksum.h | File | 3.24 KB | 0644 |
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chpid.h | File | 974 B | 0644 |
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cio.h | File | 8.01 KB | 0644 |
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clp.h | File | 1.32 KB | 0644 |
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cmb.h | File | 425 B | 0644 |
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cmpxchg.h | File | 1.76 KB | 0644 |
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compat.h | File | 7.9 KB | 0644 |
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cpacf.h | File | 16.8 KB | 0644 |
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cpcmd.h | File | 1.11 KB | 0644 |
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cpu.h | File | 549 B | 0644 |
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cpu_mf.h | File | 8.99 KB | 0644 |
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cpufeature.h | File | 963 B | 0644 |
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cputime.h | File | 805 B | 0644 |
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crw.h | File | 1.86 KB | 0644 |
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css_chars.h | File | 769 B | 0644 |
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ctl_reg.h | File | 2.89 KB | 0644 |
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current.h | File | 405 B | 0644 |
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debug.h | File | 8.1 KB | 0644 |
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delay.h | File | 721 B | 0644 |
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diag.h | File | 5.94 KB | 0644 |
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dis.h | File | 637 B | 0644 |
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dma-mapping.h | File | 621 B | 0644 |
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dma.h | File | 456 B | 0644 |
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eadm.h | File | 2.03 KB | 0644 |
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ebcdic.h | File | 1.41 KB | 0644 |
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elf.h | File | 10.36 KB | 0644 |
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exec.h | File | 269 B | 0644 |
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extable.h | File | 875 B | 0644 |
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extmem.h | File | 804 B | 0644 |
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facility.h | File | 2.44 KB | 0644 |
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fcx.h | File | 7.91 KB | 0644 |
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ftrace.h | File | 1.66 KB | 0644 |
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futex.h | File | 2.07 KB | 0644 |
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gmap.h | File | 4.93 KB | 0644 |
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hardirq.h | File | 670 B | 0644 |
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hugetlb.h | File | 2.82 KB | 0644 |
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hw_irq.h | File | 249 B | 0644 |
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idals.h | File | 5.22 KB | 0644 |
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idle.h | File | 709 B | 0644 |
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io.h | File | 2.03 KB | 0644 |
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ipl.h | File | 3.6 KB | 0644 |
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irq.h | File | 2.55 KB | 0644 |
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irqflags.h | File | 1.76 KB | 0644 |
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isc.h | File | 1000 B | 0644 |
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itcw.h | File | 950 B | 0644 |
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jump_label.h | File | 1.36 KB | 0644 |
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kdebug.h | File | 386 B | 0644 |
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kexec.h | File | 1.32 KB | 0644 |
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kprobes.h | File | 2.24 KB | 0644 |
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kvm_host.h | File | 22.24 KB | 0644 |
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kvm_para.h | File | 5.78 KB | 0644 |
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linkage.h | File | 633 B | 0644 |
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livepatch.h | File | 461 B | 0644 |
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lowcore.h | File | 6.29 KB | 0644 |
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mmu.h | File | 1.19 KB | 0644 |
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mmu_context.h | File | 3.84 KB | 0644 |
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mmzone.h | File | 316 B | 0644 |
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module.h | File | 802 B | 0644 |
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nmi.h | File | 3.44 KB | 0644 |
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nospec-branch.h | File | 342 B | 0644 |
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nospec-insn.h | File | 3.81 KB | 0644 |
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numa.h | File | 730 B | 0644 |
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os_info.h | File | 1.1 KB | 0644 |
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page-states.h | File | 486 B | 0644 |
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page.h | File | 5.12 KB | 0644 |
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pci.h | File | 6.26 KB | 0644 |
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pci_clp.h | File | 4.25 KB | 0644 |
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pci_debug.h | File | 608 B | 0644 |
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pci_dma.h | File | 5.7 KB | 0644 |
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pci_insn.h | File | 2.59 KB | 0644 |
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pci_io.h | File | 4.58 KB | 0644 |
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percpu.h | File | 6.43 KB | 0644 |
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perf_event.h | File | 2.71 KB | 0644 |
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pgalloc.h | File | 4.32 KB | 0644 |
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pgtable.h | File | 47.7 KB | 0644 |
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pkey.h | File | 4.23 KB | 0644 |
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preempt.h | File | 3.25 KB | 0644 |
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processor.h | File | 10.42 KB | 0644 |
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ptrace.h | File | 5.27 KB | 0644 |
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qdio.h | File | 11.67 KB | 0644 |
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reset.h | File | 471 B | 0644 |
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runtime_instr.h | File | 1.76 KB | 0644 |
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schid.h | File | 525 B | 0644 |
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sclp.h | File | 3.38 KB | 0644 |
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scsw.h | File | 24.1 KB | 0644 |
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seccomp.h | File | 516 B | 0644 |
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sections.h | File | 155 B | 0644 |
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segment.h | File | 93 B | 0644 |
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serial.h | File | 147 B | 0644 |
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set_memory.h | File | 779 B | 0644 |
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setup.h | File | 4.44 KB | 0644 |
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shmparam.h | File | 285 B | 0644 |
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signal.h | File | 644 B | 0644 |
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sigp.h | File | 1.8 KB | 0644 |
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smp.h | File | 2.45 KB | 0644 |
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sparsemem.h | File | 214 B | 0644 |
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spinlock.h | File | 3.53 KB | 0644 |
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spinlock_types.h | File | 437 B | 0644 |
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stp.h | File | 1.26 KB | 0644 |
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string.h | File | 4.5 KB | 0644 |
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switch_to.h | File | 1.37 KB | 0644 |
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syscall.h | File | 2.63 KB | 0644 |
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sysinfo.h | File | 4.22 KB | 0644 |
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termios.h | File | 685 B | 0644 |
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thread_info.h | File | 3.15 KB | 0644 |
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timex.h | File | 6.15 KB | 0644 |
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tlb.h | File | 5.71 KB | 0644 |
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tlbflush.h | File | 3.52 KB | 0644 |
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topology.h | File | 2.69 KB | 0644 |
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uaccess.h | File | 6.57 KB | 0644 |
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unistd.h | File | 1.03 KB | 0644 |
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uprobes.h | File | 588 B | 0644 |
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user.h | File | 3.3 KB | 0644 |
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vdso.h | File | 1.8 KB | 0644 |
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vga.h | File | 170 B | 0644 |
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vtime.h | File | 182 B | 0644 |
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vtimer.h | File | 866 B | 0644 |
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vx-insn.h | File | 10.66 KB | 0644 |
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xor.h | File | 454 B | 0644 |
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