Rename RISC-V_RV32_SiFive_HiFive1-FreedomStudio directory to RISC-V_RV32_SiFive_HiFiv...

[freertos] / FreeRTOS / Demo / RISC-V_RV32_SiFive_HiFive1-RevB_FreedomStudio / freedom-metal / gloss / sys_times.c

diff --git a/FreeRTOS/Demo/RISC-V_RV32_SiFive_HiFive1-RevB_FreedomStudio/freedom-metal/gloss/sys_times.c b/FreeRTOS/Demo/RISC-V_RV32_SiFive_HiFive1-RevB_FreedomStudio/freedom-metal/gloss/sys_times.c
new file mode 100644 (file)
index 0000000..6beedcb
--- /dev/null
+++ b/FreeRTOS/Demo/RISC-V_RV32_SiFive_HiFive1-RevB_FreedomStudio/freedom-metal/gloss/sys_times.c
@@ -0,0 +1,42 @@
+#include <sys/times.h>
+#include <sys/time.h>
+#include <metal/timer.h>
+#include <errno.h>
+
+extern int _gettimeofday(struct timeval *, void *);
+
+/* Timing information for current process. From
+   newlib/libc/include/sys/times.h the tms struct fields are as follows:
+
+   - clock_t tms_utime  : user clock ticks
+   - clock_t tms_stime  : system clock ticks
+   - clock_t tms_cutime : children's user clock ticks
+   - clock_t tms_cstime : children's system clock ticks
+
+   Since maven does not currently support processes we set both of the
+   children's times to zero. Eventually we might want to separately
+   account for user vs system time, but for now we just return the total
+   number of cycles since starting the program.  */
+clock_t
+_times(struct tms *buf)
+{
+    int rv;
+    // when called for the first time, initialize t0
+    static struct timeval t0;
+    if (t0.tv_sec == 0 && t0.tv_usec == 0)
+        _gettimeofday (&t0, 0);
+
+    struct timeval t;
+    _gettimeofday (&t, 0);
+
+    unsigned long long timebase;
+    rv = metal_timer_get_timebase_frequency(0, &timebase);
+    if (rv != 0) {
+        return -1;
+    }
+
+    long long utime = (t.tv_sec - t0.tv_sec) * 1000000 + (t.tv_usec - t0.tv_usec);
+    buf->tms_utime = utime * timebase / 1000000;
+    buf->tms_stime = buf->tms_cstime = buf->tms_cutime = 0;
+    return 0;
+}