linux-generic: use arch optimisations for time

Switch to using configure time optimizations from compile time

Signed-off-by: Mike Holmes <mike.holmes@linaro.org>
Reviewed-by: Anders Roxell <anders.roxell@linaro.org>
Signed-off-by: Maxim Uvarov <maxim.uvarov@linaro.org>

3 files changed, 82 insertions, 0 deletions

diff --git a/platform/linux-generic/arch/linux/odp_time.c b/platform/linux-generic/arch/linux/odp_time.c
new file mode 100644
index 000000000..4dc0764ed
--- /dev/null
+++ b/platform/linux-generic/arch/linux/odp_time.c
@@ -0,0 +1,38 @@
+/* Copyright (c) 2015, Linaro Limited
+ * All rights reserved.
+ *
+ * SPDX-License-Identifier:     BSD-3-Clause
+ */
+
+#define _POSIX_C_SOURCE 199309L
+
+#include <stdlib.h>
+#include <time.h>
+
+#include <odp/time.h>
+#include <odp/hints.h>
+#include <odp/system_info.h>
+#include <odp_debug_internal.h>
+
+#define GIGA 1000000000
+
+uint64_t odp_time_cycles(void)
+{
+	struct timespec time;
+	uint64_t sec, ns, hz, cycles;
+	int ret;
+
+	ret = clock_gettime(CLOCK_MONOTONIC_RAW, &time);
+
+	if (ret != 0)
+		ODP_ABORT("clock_gettime failed\n");
+
+	hz  = odp_sys_cpu_hz();
+	sec = (uint64_t) time.tv_sec;
+	ns  = (uint64_t) time.tv_nsec;
+
+	cycles  = sec * hz;
+	cycles += (ns * hz) / GIGA;
+
+	return cycles;
+}
diff --git a/platform/linux-generic/arch/mips64/odp_time.c b/platform/linux-generic/arch/mips64/odp_time.c
new file mode 100644
index 000000000..4fb790b19
--- /dev/null
+++ b/platform/linux-generic/arch/mips64/odp_time.c
@@ -0,0 +1,21 @@
+/* Copyright (c) 2015, Linaro Limited
+ * All rights reserved.
+ *
+ * SPDX-License-Identifier:     BSD-3-Clause
+ */
+
+#include <odp/time.h>
+#include <odp/hints.h>
+#include <odp/system_info.h>
+
+uint64_t odp_time_cycles(void)
+{
+	#define CVMX_TMP_STR(x) CVMX_TMP_STR2(x)
+	#define CVMX_TMP_STR2(x) #x
+	uint64_t cycle;
+
+	__asm__ __volatile__ ("rdhwr %[rt],$" CVMX_TMP_STR(31) :
+			   [rt] "=d" (cycle) : : "memory");
+
+	return cycle;
+}
diff --git a/platform/linux-generic/arch/x86/odp_time.c b/platform/linux-generic/arch/x86/odp_time.c
new file mode 100644
index 000000000..a11156184
--- /dev/null
+++ b/platform/linux-generic/arch/x86/odp_time.c
@@ -0,0 +1,23 @@
+/* Copyright (c) 2015, Linaro Limited
+ * All rights reserved.
+ *
+ * SPDX-License-Identifier:     BSD-3-Clause
+ */
+#include <odp/time.h>
+
+uint64_t odp_time_cycles(void)
+{
+	union {
+		uint64_t tsc_64;
+		struct {
+			uint32_t lo_32;
+			uint32_t hi_32;
+		};
+	} tsc;
+
+	__asm__ __volatile__ ("rdtsc" :
+		     "=a" (tsc.lo_32),
+		     "=d" (tsc.hi_32) : : "memory");
+
+	return tsc.tsc_64;
+}