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Diffstat (limited to 'arch/riscv/include/asm/timex.h')
-rw-r--r--arch/riscv/include/asm/timex.h59
1 files changed, 59 insertions, 0 deletions
diff --git a/arch/riscv/include/asm/timex.h b/arch/riscv/include/asm/timex.h
new file mode 100644
index 000000000000..3df4932d8964
--- /dev/null
+++ b/arch/riscv/include/asm/timex.h
@@ -0,0 +1,59 @@
+/*
+ * Copyright (C) 2012 Regents of the University of California
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, version 2.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef _ASM_RISCV_TIMEX_H
+#define _ASM_RISCV_TIMEX_H
+
+#include <asm/param.h>
+
+typedef unsigned long cycles_t;
+
+static inline cycles_t get_cycles(void)
+{
+ cycles_t n;
+
+ __asm__ __volatile__ (
+ "rdtime %0"
+ : "=r" (n));
+ return n;
+}
+
+#ifdef CONFIG_64BIT
+static inline uint64_t get_cycles64(void)
+{
+ return get_cycles();
+}
+#else
+static inline uint64_t get_cycles64(void)
+{
+ u32 lo, hi, tmp;
+ __asm__ __volatile__ (
+ "1:\n"
+ "rdtimeh %0\n"
+ "rdtime %1\n"
+ "rdtimeh %2\n"
+ "bne %0, %2, 1b"
+ : "=&r" (hi), "=&r" (lo), "=&r" (tmp));
+ return ((u64)hi << 32) | lo;
+}
+#endif
+
+#define ARCH_HAS_READ_CURRENT_TIMER
+
+static inline int read_current_timer(unsigned long *timer_val)
+{
+ *timer_val = get_cycles();
+ return 0;
+}
+
+#endif /* _ASM_RISCV_TIMEX_H */