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authorVincenzo Frascino <vincenzo.frascino@arm.com>2019-06-21 10:52:47 +0100
committerPaul Burton <paul.burton@mips.com>2019-07-25 21:45:35 -0700
commitabed3d826f2fb723c61b1251720348a42357c4e5 (patch)
treea5e86a723bf4b75d5bcb029ad94b15a3414cacd7 /arch/mips/include/asm/vdso/gettimeofday.h
parent24640f233b466051ad3a5d2786d2951e43026c9d (diff)
mips: Add clock_getres entry point
The generic vDSO library provides an implementation of clock_getres() that can be leveraged by each architecture. Add clock_getres() entry point on mips. Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Paul Burton <paul.burton@mips.com> Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com> Signed-off-by: Paul Burton <paul.burton@mips.com>
Diffstat (limited to 'arch/mips/include/asm/vdso/gettimeofday.h')
-rw-r--r--arch/mips/include/asm/vdso/gettimeofday.h26
1 files changed, 26 insertions, 0 deletions
diff --git a/arch/mips/include/asm/vdso/gettimeofday.h b/arch/mips/include/asm/vdso/gettimeofday.h
index aa20865b288b..c59fe08b0347 100644
--- a/arch/mips/include/asm/vdso/gettimeofday.h
+++ b/arch/mips/include/asm/vdso/gettimeofday.h
@@ -22,6 +22,8 @@
#include <asm/unistd.h>
#include <asm/vdso.h>
+#define VDSO_HAS_CLOCK_GETRES 1
+
#ifdef CONFIG_MIPS_CLOCK_VSYSCALL
static __always_inline long gettimeofday_fallback(
@@ -79,6 +81,30 @@ static __always_inline long clock_gettime_fallback(
return error ? -ret : ret;
}
+static __always_inline int clock_getres_fallback(
+ clockid_t _clkid,
+ struct __kernel_timespec *_ts)
+{
+ register struct __kernel_timespec *ts asm("a1") = _ts;
+ register clockid_t clkid asm("a0") = _clkid;
+ register long ret asm("v0");
+#if _MIPS_SIM == _MIPS_SIM_ABI64
+ register long nr asm("v0") = __NR_clock_getres;
+#else
+ register long nr asm("v0") = __NR_clock_getres_time64;
+#endif
+ register long error asm("a3");
+
+ asm volatile(
+ " syscall\n"
+ : "=r" (ret), "=r" (error)
+ : "r" (clkid), "r" (ts), "r" (nr)
+ : "$1", "$3", "$8", "$9", "$10", "$11", "$12", "$13",
+ "$14", "$15", "$24", "$25", "hi", "lo", "memory");
+
+ return error ? -ret : ret;
+}
+
#ifdef CONFIG_CSRC_R4K
static __always_inline u64 read_r4k_count(void)

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