Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / arch / arm / cpu / armv8 / generic_timer.c

diff --git a/qemu/roms/u-boot/arch/arm/cpu/armv8/generic_timer.c b/qemu/roms/u-boot/arch/arm/cpu/armv8/generic_timer.c
new file mode 100644 (file)
index 0000000..223b95e
--- /dev/null
+++ b/qemu/roms/u-boot/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;
+}