Initial commit of vpp code.v1.0.0

Change-Id: Ib246f1fbfce93274020ee93ce461e3d8bd8b9f17
Signed-off-by: Ed Warnicke <eaw@cisco.com>

1 files changed, 239 insertions, 0 deletions

diff --git a/vppinfra/vppinfra/time.h b/vppinfra/vppinfra/time.h
new file mode 100644
index 00000000000..524eff6c7a1
--- /dev/null
+++ b/vppinfra/vppinfra/time.h
@@ -0,0 +1,239 @@
+/*
+ * Copyright (c) 2015 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+/*
+  Copyright (c) 2001, 2002, 2003 Eliot Dresselhaus
+
+  Permission is hereby granted, free of charge, to any person obtaining
+  a copy of this software and associated documentation files (the
+  "Software"), to deal in the Software without restriction, including
+  without limitation the rights to use, copy, modify, merge, publish,
+  distribute, sublicense, and/or sell copies of the Software, and to
+  permit persons to whom the Software is furnished to do so, subject to
+  the following conditions:
+
+  The above copyright notice and this permission notice shall be
+  included in all copies or substantial portions of the Software.
+
+  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+*/
+
+#ifndef included_time_h
+#define included_time_h
+
+#include <vppinfra/clib.h>
+
+typedef struct {
+  /* Total run time in clock cycles
+     since clib_time_init call. */
+  u64 total_cpu_time;
+
+  /* Last recorded time stamp. */
+  u64 last_cpu_time;
+
+  /* CPU clock frequency. */
+  f64 clocks_per_second;
+
+  /* 1 / cpu clock frequency: conversion factor
+     from clock cycles into seconds. */
+  f64 seconds_per_clock;
+
+  /* Time stamp of call to clib_time_init call. */
+  u64 init_cpu_time;
+
+  u64 last_verify_cpu_time;
+
+  /* Same but for reference time (if present). */
+  f64 last_verify_reference_time;
+
+  u32 log2_clocks_per_second, log2_clocks_per_frequency_verify;
+} clib_time_t;
+
+/* Return CPU time stamp as 64bit number. */
+#if defined(__x86_64__) || defined(i386)
+always_inline u64 clib_cpu_time_now (void)
+{
+  u32 a, d;
+  asm volatile ("rdtsc"
+		: "=a" (a), "=d" (d));
+  return (u64) a + ((u64) d << (u64) 32);
+}
+
+#elif defined (__powerpc64__)
+
+always_inline u64 clib_cpu_time_now (void)
+{
+  u64 t;
+  asm volatile ("mftb %0" : "=r" (t));
+  return t;
+}
+
+#elif defined (__SPU__)
+
+always_inline u64 clib_cpu_time_now (void)
+{
+#ifdef _XLC
+  return spu_rdch (0x8);
+#else
+  return 0 /* __builtin_si_rdch (0x8) FIXME */;
+#endif
+}
+
+#elif defined (__powerpc__)
+
+always_inline u64 clib_cpu_time_now (void)
+{
+  u32 hi1, hi2, lo;
+  asm volatile (
+    "1:\n"
+    "mftbu %[hi1]\n"
+    "mftb  %[lo]\n"
+    "mftbu %[hi2]\n"
+    "cmpw %[hi1],%[hi2]\n"
+    "bne 1b\n"
+    : [hi1] "=r" (hi1), [hi2] "=r" (hi2), [lo] "=r" (lo));
+  return (u64) lo + ((u64) hi2 << (u64) 32);
+}
+
+#elif defined (__arm__)
+
+always_inline u64 clib_cpu_time_now (void)
+{
+  u32 lo;
+  asm volatile ("mrc p15, 0, %[lo], c15, c12, 1"
+		: [lo] "=r" (lo));
+  return (u64) lo;
+}
+
+#elif defined (__xtensa__)
+
+/* Stub for now. */
+always_inline u64 clib_cpu_time_now (void)
+{ return 0; }
+
+#elif defined (__TMS320C6X__)
+
+always_inline u64 clib_cpu_time_now (void)
+{
+  u32 l, h;
+
+  asm volatile (" dint\n"
+		" mvc .s2 TSCL,%0\n"
+		" mvc .s2 TSCH,%1\n"
+		" rint\n"
+		: "=b" (l), "=b" (h));
+
+  return ((u64)h << 32) | l;
+}
+
+#else
+
+#error "don't know how to read CPU time stamp"
+
+#endif
+
+void clib_time_verify_frequency (clib_time_t * c);
+
+always_inline f64 clib_time_now_internal (clib_time_t * c, u64 n)
+{
+  u64 l = c->last_cpu_time;
+  u64 t = c->total_cpu_time;
+  t += n - l;
+  c->total_cpu_time = t;
+  c->last_cpu_time = n;
+  if (PREDICT_FALSE ((c->last_cpu_time - c->last_verify_cpu_time) >> c->log2_clocks_per_frequency_verify))
+    clib_time_verify_frequency (c);
+  return t * c->seconds_per_clock;
+}
+
+always_inline f64
+clib_time_now (clib_time_t * c)
+{
+  return clib_time_now_internal (c, clib_cpu_time_now());
+}
+
+always_inline void clib_cpu_time_wait (u64 dt)
+{
+  u64 t_end = clib_cpu_time_now () + dt;
+  while (clib_cpu_time_now () < t_end)
+    ;
+}
+
+void clib_time_init (clib_time_t * c);
+
+#ifdef CLIB_UNIX
+
+#include <time.h>
+#include <sys/time.h>
+#include <sys/resource.h>
+#include <unistd.h>
+#include <sys/syscall.h>
+
+/* Use 64bit floating point to represent time offset from epoch. */
+always_inline f64 unix_time_now (void)
+{
+  /* clock_gettime without indirect syscall uses GLIBC wrappers which
+     we don't want.  Just the bare metal, please. */
+  struct timespec ts;
+  syscall (SYS_clock_gettime, CLOCK_REALTIME, &ts);
+  return ts.tv_sec + 1e-9*ts.tv_nsec;
+}
+
+/* As above but integer number of nano-seconds. */
+always_inline u64 unix_time_now_nsec (void)
+{
+  struct timespec ts;
+  syscall (SYS_clock_gettime, CLOCK_REALTIME, &ts);
+  return 1e9*ts.tv_sec + ts.tv_nsec;
+}
+
+always_inline f64 unix_usage_now (void)
+{
+  struct rusage u;
+  getrusage (RUSAGE_SELF, &u);
+  return u.ru_utime.tv_sec + 1e-6*u.ru_utime.tv_usec
+    + u.ru_stime.tv_sec + 1e-6*u.ru_stime.tv_usec;
+}
+
+always_inline void unix_sleep (f64 dt)
+{
+  struct timespec t;
+  t.tv_sec = dt;
+  t.tv_nsec = 1e9 * dt;
+  nanosleep (&t, 0);
+}
+
+#else  /* ! CLIB_UNIX */
+
+always_inline f64 unix_time_now (void)
+{ return 0; }
+
+always_inline u64 unix_time_now_nsec (void)
+{ return 0; }
+
+always_inline f64 unix_usage_now (void)
+{ return 0; }
+
+always_inline void unix_sleep (f64 dt)
+{ }
+
+#endif
+
+#endif /* included_time_h */