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Diffstat (limited to 'arch/x86/lib/timer.c')
-rw-r--r--arch/x86/lib/timer.c17
1 files changed, 17 insertions, 0 deletions
diff --git a/arch/x86/lib/timer.c b/arch/x86/lib/timer.c
index fd7032e..a13424b 100644
--- a/arch/x86/lib/timer.c
+++ b/arch/x86/lib/timer.c
@@ -37,6 +37,7 @@ struct timer_isr_function {
static struct timer_isr_function *first_timer_isr;
static unsigned long system_ticks;
+static uint64_t base_value;
/*
* register_timer_isr() allows multiple architecture and board specific
@@ -98,3 +99,19 @@ ulong get_timer(ulong base)
{
return system_ticks - base;
}
+
+void timer_set_tsc_base(uint64_t new_base)
+{
+ base_value = new_base;
+}
+
+uint64_t timer_get_tsc(void)
+{
+ uint64_t time_now;
+
+ time_now = rdtsc();
+ if (!base_value)
+ base_value = time_now;
+
+ return time_now - base_value;
+}