1 files changed, 99 insertions, 0 deletions
diff --git a/arch/loongarch/include/asm/vdso/gettimeofday.h b/arch/loongarch/include/asm/vdso/gettimeofday.h
new file mode 100644
index 000000000000..7b2cd37641e2
--- /dev/null
+++ b/arch/loongarch/include/asm/vdso/gettimeofday.h
@@ -0,0 +1,99 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Author: Huacai Chen <chenhuacai@loongson.cn>
+ *
+ * Copyright (C) 2020-2022 Loongson Technology Corporation Limited
+ */
+#ifndef __ASM_VDSO_GETTIMEOFDAY_H
+#define __ASM_VDSO_GETTIMEOFDAY_H
+
+#ifndef __ASSEMBLY__
+
+#include <asm/unistd.h>
+#include <asm/vdso/vdso.h>
+
+#define VDSO_HAS_CLOCK_GETRES		1
+
+static __always_inline long gettimeofday_fallback(
+				struct __kernel_old_timeval *_tv,
+				struct timezone *_tz)
+{
+	register struct __kernel_old_timeval *tv asm("a0") = _tv;
+	register struct timezone *tz asm("a1") = _tz;
+	register long nr asm("a7") = __NR_gettimeofday;
+	register long ret asm("a0");
+
+	asm volatile(
+	"       syscall 0\n"
+	: "+r" (ret)
+	: "r" (nr), "r" (tv), "r" (tz)
+	: "$t0", "$t1", "$t2", "$t3", "$t4", "$t5", "$t6", "$t7",
+	  "$t8", "memory");
+
+	return ret;
+}
+
+static __always_inline long clock_gettime_fallback(
+					clockid_t _clkid,
+					struct __kernel_timespec *_ts)
+{
+	register clockid_t clkid asm("a0") = _clkid;
+	register struct __kernel_timespec *ts asm("a1") = _ts;
+	register long nr asm("a7") = __NR_clock_gettime;
+	register long ret asm("a0");
+
+	asm volatile(
+	"       syscall 0\n"
+	: "+r" (ret)
+	: "r" (nr), "r" (clkid), "r" (ts)
+	: "$t0", "$t1", "$t2", "$t3", "$t4", "$t5", "$t6", "$t7",
+	  "$t8", "memory");
+
+	return ret;
+}
+
+static __always_inline int clock_getres_fallback(
+					clockid_t _clkid,
+					struct __kernel_timespec *_ts)
+{
+	register clockid_t clkid asm("a0") = _clkid;
+	register struct __kernel_timespec *ts asm("a1") = _ts;
+	register long nr asm("a7") = __NR_clock_getres;
+	register long ret asm("a0");
+
+	asm volatile(
+	"       syscall 0\n"
+	: "+r" (ret)
+	: "r" (nr), "r" (clkid), "r" (ts)
+	: "$t0", "$t1", "$t2", "$t3", "$t4", "$t5", "$t6", "$t7",
+	  "$t8", "memory");
+
+	return ret;
+}
+
+static __always_inline u64 __arch_get_hw_counter(s32 clock_mode,
+						 const struct vdso_data *vd)
+{
+	uint64_t count;
+
+	__asm__ __volatile__(
+	"	rdtime.d %0, $zero\n"
+	: "=r" (count));
+
+	return count;
+}
+
+static inline bool loongarch_vdso_hres_capable(void)
+{
+	return true;
+}
+#define __arch_vdso_hres_capable loongarch_vdso_hres_capable
+
+static __always_inline const struct vdso_data *__arch_get_vdso_data(void)
+{
+	return get_vdso_data();
+}
+
+#endif /* !__ASSEMBLY__ */
+
+#endif /* __ASM_VDSO_GETTIMEOFDAY_H */