riscv: update mtime initialization

Add a interface, which is implemented by SoC.

Change-Id: I5524732f6eb3841e43afd176644119b03b5e5e27
Signed-off-by: Xiang Wang <wxjstz@126.com>
Reviewed-on: https://review.coreboot.org/28372
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>

2 files changed, 23 insertions, 0 deletions

diff --git a/src/soc/sifive/fu540/Makefile.inc b/src/soc/sifive/fu540/Makefile.inc
index 9e7f584f78..abd3458b28 100644
--- a/src/soc/sifive/fu540/Makefile.inc
+++ b/src/soc/sifive/fu540/Makefile.inc
@@ -14,6 +14,7 @@
 ifeq ($(CONFIG_SOC_SIFIVE_FU540),y)
 
 bootblock-y += uart.c
+bootblock-y += mtime.c
 bootblock-y += media.c
 bootblock-y += bootblock.c
 
diff --git a/src/soc/sifive/fu540/mtime.c b/src/soc/sifive/fu540/mtime.c
new file mode 100644
index 0000000000..f8c2717563
--- /dev/null
+++ b/src/soc/sifive/fu540/mtime.c
@@ -0,0 +1,22 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2018 HardenedLinux
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <mcall.h>
+
+/* FIXME: This is an empty implementation, please improve */
+/* This function is used to initialize HLS()->time/HLS()->timecmp  */
+void mtime_init(void)
+{
+}