6 files changed, 41 insertions, 6 deletions

diff --git a/src/cpu/samsung/exynos5250/clk.h b/src/cpu/samsung/exynos5250/clk.h
index 828e7d8832..1894c006d2 100644
--- a/src/cpu/samsung/exynos5250/clk.h
+++ b/src/cpu/samsung/exynos5250/clk.h
@@ -585,7 +585,6 @@ int clock_get_mem_selection(enum ddr_mode *mem_type,
 		unsigned *frequency_mhz, unsigned *arm_freq,
 		enum mem_manuf *mem_manuf);
 
-void mct_start(void);
 uint64_t mct_raw_value(void);
 
 #endif
diff --git a/src/cpu/samsung/exynos5250/mct.c b/src/cpu/samsung/exynos5250/mct.c
index db76e9d0b4..4216643140 100644
--- a/src/cpu/samsung/exynos5250/mct.c
+++ b/src/cpu/samsung/exynos5250/mct.c
@@ -22,7 +22,7 @@
 
 #include <arch/io.h>
 #include <stdint.h>
-
+#include <time.h>
 #include "clk.h"
 
 struct __attribute__((packed)) mct_regs
@@ -101,8 +101,16 @@ uint64_t mct_raw_value(void)
 	return (upper << 32) | lower;
 }
 
-void mct_start(void)
+void timer_start(void)
 {
 	writel(readl(&mct->g_tcon) | (0x1 << 8), &mct->g_tcon);
 	enabled = 1;
 }
+
+u32 timer_us(void)
+{
+	uint64_t raw = mct_raw_value();
+	static uint32_t ticks_per_microsecond = MCT_HZ/1000000;
+	uint32_t usec = raw / ticks_per_microsecond;
+	return usec;
+}
diff --git a/src/cpu/samsung/exynos5250/monotonic_timer.c b/src/cpu/samsung/exynos5250/monotonic_timer.c
index 7c6229b38e..85fb2082b3 100644
--- a/src/cpu/samsung/exynos5250/monotonic_timer.c
+++ b/src/cpu/samsung/exynos5250/monotonic_timer.c
@@ -20,6 +20,7 @@
 #include <stdint.h>
 #include <delay.h>
 #include <timer.h>
+#include <time.h>	/* TODO: deprecate in favor of monotonic timer stuff */
 
 #include "clk.h"
 
diff --git a/src/include/time.h b/src/include/time.h
new file mode 100644
index 0000000000..2cfcb356c4
--- /dev/null
+++ b/src/include/time.h
@@ -0,0 +1,26 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2013 Google, Inc.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA, 02110-1301 USA
+ */
+
+#ifndef TIME_H
+#define TIME_H
+
+void timer_start(void);
+u32 timer_us(void);
+
+#endif /* TIME_H */
diff --git a/src/mainboard/google/snow/bootblock.c b/src/mainboard/google/snow/bootblock.c
index 56c2650f7a..44640428a7 100644
--- a/src/mainboard/google/snow/bootblock.c
+++ b/src/mainboard/google/snow/bootblock.c
@@ -21,8 +21,8 @@
 #include <arch/io.h>
 #include <cbfs.h>
 #include <uart.h>
+#include <time.h>
 #include <console/console.h>
-#include <cpu/samsung/exynos5250/clk.h>
 #include <cpu/samsung/exynos5250/periph.h>
 #include <cpu/samsung/exynos5250/pinmux.h>
 #include "mainboard.h"
@@ -30,10 +30,10 @@
 void bootblock_mainboard_init(void);
 void bootblock_mainboard_init(void)
 {
-	/* kick off the multi-core timer.
+	/* kick off the microsecond timer.
 	 * We want to do this as early as we can.
 	 */
-	mct_start();
+	timer_start();
 
 	if (snow_get_wakeup_state() == SNOW_WAKEUP_DIRECT) {
 		snow_wakeup();
diff --git a/src/mainboard/google/snow/romstage.c b/src/mainboard/google/snow/romstage.c
index 508dac6590..aa3a3405e3 100644
--- a/src/mainboard/google/snow/romstage.c
+++ b/src/mainboard/google/snow/romstage.c
@@ -36,6 +36,7 @@
 #include <cpu/samsung/exynos5250/clock_init.h>
 #include <console/console.h>
 #include <arch/stages.h>
+#include <time.h>
 
 #include <drivers/maxim/max77686/max77686.h>
 #include <device/i2c.h>