添加rtthread相关代码

riscv/rtthread/components/drivers/cputime/cputime.c

@@ -0,0 +1,116 @@
+/*
+ * Copyright (c) 2006-2023, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author            Notes
+ * 2017-12-23     Bernard           first version
+ */
+
+#include <rtdevice.h>
+#include <rtthread.h>
+#include <sys/errno.h>
+
+static const struct rt_clock_cputime_ops *_cputime_ops  = RT_NULL;
+
+/**
+ * The clock_cpu_getres() function shall return the resolution of CPU time, the
+ * number of nanosecond per tick.
+ *
+ * @return the number of nanosecond per tick(x (1000UL * 1000))
+ */
+uint64_t clock_cpu_getres(void)
+{
+    if (_cputime_ops)
+        return _cputime_ops->cputime_getres();
+
+    rt_set_errno(ENOSYS);
+    return 0;
+}
+
+/**
+ * The clock_cpu_gettime() function shall return the current value of cpu time tick.
+ *
+ * @return the cpu tick
+ */
+uint64_t clock_cpu_gettime(void)
+{
+    if (_cputime_ops)
+        return _cputime_ops->cputime_gettime();
+
+    rt_set_errno(ENOSYS);
+    return 0;
+}
+
+/**
+ * The clock_cpu_settimeout() fucntion set timeout time and timeout callback function
+ * The timeout callback function will be called when the timeout time is reached
+ *
+ * @param tick the Timeout tick
+ * @param timeout the Timeout function
+ * @param parameter the Parameters of timeout function
+ *
+ */
+int clock_cpu_settimeout(uint64_t tick, void (*timeout)(void *param), void *param)
+{
+    if (_cputime_ops)
+        return _cputime_ops->cputime_settimeout(tick, timeout, param);
+
+    rt_set_errno(ENOSYS);
+    return 0;
+}
+
+int clock_cpu_issettimeout(void)
+{
+    if (_cputime_ops)
+        return _cputime_ops->cputime_settimeout != RT_NULL;
+    return RT_FALSE;
+}
+
+/**
+ * The clock_cpu_microsecond() fucntion shall return the microsecond according to
+ * cpu_tick parameter.
+ *
+ * @param cpu_tick the cpu tick
+ *
+ * @return the microsecond
+ */
+uint64_t clock_cpu_microsecond(uint64_t cpu_tick)
+{
+    uint64_t unit = clock_cpu_getres();
+
+    return (uint64_t)(((cpu_tick * unit) / (1000UL * 1000)) / 1000);
+}
+
+/**
+ * The clock_cpu_microsecond() fucntion shall return the millisecond according to
+ * cpu_tick parameter.
+ *
+ * @param cpu_tick the cpu tick
+ *
+ * @return the millisecond
+ */
+uint64_t clock_cpu_millisecond(uint64_t cpu_tick)
+{
+    uint64_t unit = clock_cpu_getres();
+
+    return (uint64_t)(((cpu_tick * unit) / (1000UL * 1000)) / (1000UL * 1000));
+}
+
+/**
+ * The clock_cpu_seops() function shall set the ops of cpu time.
+ *
+ * @return always return 0.
+ */
+int clock_cpu_setops(const struct rt_clock_cputime_ops *ops)
+{
+    _cputime_ops = ops;
+    if (ops)
+    {
+        RT_ASSERT(ops->cputime_getres  != RT_NULL);
+        RT_ASSERT(ops->cputime_gettime != RT_NULL);
+    }
+
+    return 0;
+}