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authorDavid Feng <fenghua@phytium.com.cn>2013-12-14 11:47:35 +0800
committerAlbert ARIBAUD <albert.u.boot@aribaud.net>2014-01-09 16:08:44 +0100
commit0ae7653128c80a4f2920cbe9b124792c2fd9d9e0 (patch)
tree14fea7a80e4ea84c7b6a3bc32298daeec55054c7 /arch/arm/cpu/armv8/generic_timer.c
parent54799e4596bf8af33fd4a8dee153be7011c06d8d (diff)
downloadtalos-obmc-uboot-0ae7653128c80a4f2920cbe9b124792c2fd9d9e0.tar.gz
talos-obmc-uboot-0ae7653128c80a4f2920cbe9b124792c2fd9d9e0.zip
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>
Diffstat (limited to 'arch/arm/cpu/armv8/generic_timer.c')
-rw-r--r--arch/arm/cpu/armv8/generic_timer.c31
1 files changed, 31 insertions, 0 deletions
diff --git a/arch/arm/cpu/armv8/generic_timer.c b/arch/arm/cpu/armv8/generic_timer.c
new file mode 100644
index 0000000000..223b95e210
--- /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;
+}
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