715f23b610
Setting BUILD_VDSO32 is required to expose the legacy 32bit interfaces in the generic VDSO code which are going to be hidden behind an #ifdef BUILD_VDSO32. The 32bit fallbacks are necessary to remove the existing VDSO_HAS_32BIT_FALLBACK hackery. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Tested-by: Vincenzo Frascino <vincenzo.frascino@arm.com> Cc: linux-arm-kernel@lists.infradead.org Link: https://lore.kernel.org/r/87tv4zq9dc.fsf@nanos.tec.linutronix.de
134 lines
2.8 KiB
C
134 lines
2.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (C) 2018 ARM Limited
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*/
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#ifndef __ASM_VDSO_GETTIMEOFDAY_H
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#define __ASM_VDSO_GETTIMEOFDAY_H
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#ifndef __ASSEMBLY__
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#include <asm/barrier.h>
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#include <asm/cp15.h>
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#include <asm/unistd.h>
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#include <uapi/linux/time.h>
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#define VDSO_HAS_CLOCK_GETRES 1
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extern struct vdso_data *__get_datapage(void);
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static __always_inline int gettimeofday_fallback(
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struct __kernel_old_timeval *_tv,
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struct timezone *_tz)
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{
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register struct timezone *tz asm("r1") = _tz;
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register struct __kernel_old_timeval *tv asm("r0") = _tv;
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register long ret asm ("r0");
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register long nr asm("r7") = __NR_gettimeofday;
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asm volatile(
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" swi #0\n"
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: "=r" (ret)
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: "r" (tv), "r" (tz), "r" (nr)
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: "memory");
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return ret;
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}
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static __always_inline long clock_gettime_fallback(
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clockid_t _clkid,
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struct __kernel_timespec *_ts)
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{
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register struct __kernel_timespec *ts asm("r1") = _ts;
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register clockid_t clkid asm("r0") = _clkid;
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register long ret asm ("r0");
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register long nr asm("r7") = __NR_clock_gettime64;
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asm volatile(
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" swi #0\n"
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: "=r" (ret)
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: "r" (clkid), "r" (ts), "r" (nr)
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: "memory");
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return ret;
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}
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static __always_inline long clock_gettime32_fallback(
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clockid_t _clkid,
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struct old_timespec32 *_ts)
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{
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register struct old_timespec32 *ts asm("r1") = _ts;
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register clockid_t clkid asm("r0") = _clkid;
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register long ret asm ("r0");
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register long nr asm("r7") = __NR_clock_gettime;
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asm volatile(
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" swi #0\n"
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: "=r" (ret)
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: "r" (clkid), "r" (ts), "r" (nr)
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: "memory");
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return ret;
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}
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static __always_inline int clock_getres_fallback(
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clockid_t _clkid,
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struct __kernel_timespec *_ts)
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{
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register struct __kernel_timespec *ts asm("r1") = _ts;
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register clockid_t clkid asm("r0") = _clkid;
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register long ret asm ("r0");
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register long nr asm("r7") = __NR_clock_getres_time64;
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asm volatile(
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" swi #0\n"
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: "=r" (ret)
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: "r" (clkid), "r" (ts), "r" (nr)
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: "memory");
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return ret;
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}
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static __always_inline int clock_getres32_fallback(
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clockid_t _clkid,
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struct old_timespec32 *_ts)
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{
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register struct old_timespec32 *ts asm("r1") = _ts;
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register clockid_t clkid asm("r0") = _clkid;
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register long ret asm ("r0");
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register long nr asm("r7") = __NR_clock_getres;
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asm volatile(
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" swi #0\n"
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: "=r" (ret)
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: "r" (clkid), "r" (ts), "r" (nr)
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: "memory");
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return ret;
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}
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static __always_inline u64 __arch_get_hw_counter(int clock_mode)
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{
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#ifdef CONFIG_ARM_ARCH_TIMER
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u64 cycle_now;
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if (!clock_mode)
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return -EINVAL;
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isb();
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cycle_now = read_sysreg(CNTVCT);
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return cycle_now;
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#else
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return -EINVAL; /* use fallback */
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#endif
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}
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static __always_inline const struct vdso_data *__arch_get_vdso_data(void)
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{
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return __get_datapage();
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}
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#endif /* !__ASSEMBLY__ */
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#endif /* __ASM_VDSO_GETTIMEOFDAY_H */
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