linux-gen: cpu: add cpu cycles init global

Add global init function to check e.g. if CPU cycle counter
instruction is available on x86.

Signed-off-by: Petri Savolainen <petri.savolainen@linaro.org>
Reviewed-by: Bill Fischofer <bill.fischofer@linaro.org>
Signed-off-by: Maxim Uvarov <maxim.uvarov@linaro.org>

5 files changed, 35 insertions, 0 deletions

diff --git a/platform/linux-generic/arch/default/odp_cpu_cycles.c b/platform/linux-generic/arch/default/odp_cpu_cycles.c
index 3e3df0879..88e70b2e4 100644
--- a/platform/linux-generic/arch/default/odp_cpu_cycles.c
+++ b/platform/linux-generic/arch/default/odp_cpu_cycles.c
@@ -13,6 +13,7 @@
 
 #include <odp/api/cpu.h>
 #include <odp_debug_internal.h>
+#include <odp_init_internal.h>
 
 #define GIGA 1000000000
 
@@ -46,3 +47,8 @@ uint64_t odp_cpu_cycles_resolution(void)
 {
 	return 1;
 }
+
+int _odp_cpu_cycles_init_global(void)
+{
+	return 0;
+}
diff --git a/platform/linux-generic/arch/mips64/odp_cpu_cycles.c b/platform/linux-generic/arch/mips64/odp_cpu_cycles.c
index 26b928788..72a0e5b0c 100644
--- a/platform/linux-generic/arch/mips64/odp_cpu_cycles.c
+++ b/platform/linux-generic/arch/mips64/odp_cpu_cycles.c
@@ -9,6 +9,7 @@
 #include <odp/api/cpu.h>
 #include <odp/api/hints.h>
 #include <odp/api/system_info.h>
+#include <odp_init_internal.h>
 
 uint64_t odp_cpu_cycles(void)
 {
@@ -31,3 +32,8 @@ uint64_t odp_cpu_cycles_resolution(void)
 {
 	return 1;
 }
+
+int _odp_cpu_cycles_init_global(void)
+{
+	return 0;
+}
diff --git a/platform/linux-generic/arch/x86/cpu_flags.c b/platform/linux-generic/arch/x86/cpu_flags.c
index 0fcaa477e..f5a744fd7 100644
--- a/platform/linux-generic/arch/x86/cpu_flags.c
+++ b/platform/linux-generic/arch/x86/cpu_flags.c
@@ -368,3 +368,11 @@ int cpu_has_global_time(void)
 
 	return 0;
 }
+
+int cpu_flags_has_rdtsc(void)
+{
+	if (cpu_get_flag_enabled(RTE_CPUFLAG_TSC) > 0)
+		return 1;
+
+	return 0;
+}
diff --git a/platform/linux-generic/arch/x86/cpu_flags.h b/platform/linux-generic/arch/x86/cpu_flags.h
index b0d268888..879c9aadc 100644
--- a/platform/linux-generic/arch/x86/cpu_flags.h
+++ b/platform/linux-generic/arch/x86/cpu_flags.h
@@ -12,6 +12,7 @@ extern "C" {
 #endif
 
 void cpu_flags_print_all(void);
+int cpu_flags_has_rdtsc(void);
 
 #ifdef __cplusplus
 }
diff --git a/platform/linux-generic/arch/x86/odp_cpu_cycles.c b/platform/linux-generic/arch/x86/odp_cpu_cycles.c
index 12af1c17a..4e50b6da0 100644
--- a/platform/linux-generic/arch/x86/odp_cpu_cycles.c
+++ b/platform/linux-generic/arch/x86/odp_cpu_cycles.c
@@ -6,6 +6,10 @@
 
 #include <odp/api/cpu.h>
 
+#include "cpu_flags.h"
+#include <odp_init_internal.h>
+#include <odp_debug_internal.h>
+
 uint64_t odp_cpu_cycles(void)
 {
 	union {
@@ -32,3 +36,13 @@ uint64_t odp_cpu_cycles_resolution(void)
 {
 	return 1;
 }
+
+int _odp_cpu_cycles_init_global(void)
+{
+	if (cpu_flags_has_rdtsc() == 0) {
+		ODP_ERR("RDTSC instruction not supported\n");
+		return -1;
+	}
+
+	return 0;
+}