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authorRonald G. Minnich <rminnich@gmail.com>2013-04-11 15:03:28 -0700
committerRonald G. Minnich <rminnich@gmail.com>2013-04-13 00:47:27 +0200
commitc0b972f60dbd1a3dadfc568b5245c6b0ee6df559 (patch)
treeb46cccbe95f4c95a1319596434b437e357b9c5c8 /src/include
parent2c8f81b57b20c14edf4b77d3f5dcd2bcce717180 (diff)
downloadcoreboot-c0b972f60dbd1a3dadfc568b5245c6b0ee6df559.tar.xz
Exynos5250: add a microsecond timer
Add a microsecond timer, its declaration, the function to start it, and its usage. To start it, one calls timer_start(). From that point on, one can call timer_us() to find microseconds since the timer was started. We show its use in the bootblock. You want it started very early. Finally, the delay.h change having been (ironically) delayed, we create time.h and have it hold one declaration, for the timer_us() and timer_start() prototype. We feel that these two functions should become the hardware specific functions, allowing us to finally move udelay() into src/lib where it belongs. Change-Id: I19cbc2bb0089a3de88cfb94276266af38b9363c5 Signed-off-by: Ronald G. Minnich <rminnich@gmail.com> Reviewed-on: http://review.coreboot.org/3073 Tested-by: build bot (Jenkins)
Diffstat (limited to 'src/include')
-rw-r--r--src/include/time.h26
1 files changed, 26 insertions, 0 deletions
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 */