arm64: core support
Relocation code based on a patch by Scott Wood, which is:
Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: David Feng <fenghua@phytium.com.cn>
diff --git a/arch/arm/cpu/armv8/generic_timer.c b/arch/arm/cpu/armv8/generic_timer.c
new file mode 100644
index 0000000..223b95e
--- /dev/null
+++ b/arch/arm/cpu/armv8/generic_timer.c
@@ -0,0 +1,31 @@
+/*
+ * (C) Copyright 2013
+ * David Feng <fenghua@phytium.com.cn>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <command.h>
+#include <asm/system.h>
+
+/*
+ * Generic timer implementation of get_tbclk()
+ */
+unsigned long get_tbclk(void)
+{
+ unsigned long cntfrq;
+ asm volatile("mrs %0, cntfrq_el0" : "=r" (cntfrq));
+ return cntfrq;
+}
+
+/*
+ * Generic timer implementation of timer_read_counter()
+ */
+unsigned long timer_read_counter(void)
+{
+ unsigned long cntpct;
+ isb();
+ asm volatile("mrs %0, cntpct_el0" : "=r" (cntpct));
+ return cntpct;
+}