mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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4cd09f356e
Adjust VDSO/VSYSCALL because read_cpu_id() for 32BIT/64BIT are different, and LoongArch32 doesn't support GENERIC_GETTIMEOFDAY now (will be supported in future). Reviewed-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
99 lines
2.2 KiB
C
99 lines
2.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Author: Huacai Chen <chenhuacai@loongson.cn>
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*
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* Copyright (C) 2020-2022 Loongson Technology Corporation 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 __ASSEMBLER__
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#include <asm/unistd.h>
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#include <asm/vdso/vdso.h>
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#ifdef CONFIG_GENERIC_GETTIMEOFDAY
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#define VDSO_HAS_CLOCK_GETRES 1
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static __always_inline long 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 __kernel_old_timeval *tv asm("a0") = _tv;
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register struct timezone *tz asm("a1") = _tz;
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register long nr asm("a7") = __NR_gettimeofday;
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register long ret asm("a0");
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asm volatile(
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" syscall 0\n"
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: "=r" (ret)
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: "r" (nr), "r" (tv), "r" (tz)
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: "$t0", "$t1", "$t2", "$t3", "$t4", "$t5", "$t6", "$t7",
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"$t8", "memory");
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return ret;
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}
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static __always_inline long clock_gettime_fallback(
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clockid_t _clkid,
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struct __kernel_timespec *_ts)
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{
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register clockid_t clkid asm("a0") = _clkid;
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register struct __kernel_timespec *ts asm("a1") = _ts;
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register long nr asm("a7") = __NR_clock_gettime;
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register long ret asm("a0");
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asm volatile(
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" syscall 0\n"
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: "=r" (ret)
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: "r" (nr), "r" (clkid), "r" (ts)
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: "$t0", "$t1", "$t2", "$t3", "$t4", "$t5", "$t6", "$t7",
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"$t8", "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 clockid_t clkid asm("a0") = _clkid;
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register struct __kernel_timespec *ts asm("a1") = _ts;
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register long nr asm("a7") = __NR_clock_getres;
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register long ret asm("a0");
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asm volatile(
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" syscall 0\n"
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: "=r" (ret)
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: "r" (nr), "r" (clkid), "r" (ts)
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: "$t0", "$t1", "$t2", "$t3", "$t4", "$t5", "$t6", "$t7",
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"$t8", "memory");
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return ret;
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}
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static __always_inline u64 __arch_get_hw_counter(s32 clock_mode,
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const struct vdso_time_data *vd)
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{
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uint64_t count;
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__asm__ __volatile__(
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" rdtime.d %0, $zero\n"
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: "=r" (count));
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return count;
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}
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static inline bool loongarch_vdso_hres_capable(void)
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{
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return true;
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}
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#define __arch_vdso_hres_capable loongarch_vdso_hres_capable
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#endif /* CONFIG_GENERIC_GETTIMEOFDAY */
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#endif /* !__ASSEMBLER__ */
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#endif /* __ASM_VDSO_GETTIMEOFDAY_H */
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