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Diffstat (limited to 'src/cpu/ti/am335x/timer.c')
-rw-r--r--src/cpu/ti/am335x/timer.c51
1 files changed, 51 insertions, 0 deletions
diff --git a/src/cpu/ti/am335x/timer.c b/src/cpu/ti/am335x/timer.c
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+++ b/src/cpu/ti/am335x/timer.c
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+/*
+ * Copyright (C) 2013 Google Inc.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * 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., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <console/console.h>
+#include <delay.h>
+#include <timer.h>
+
+void init_timer(void)
+{
+}
+
+/* delay x useconds */
+void udelay(unsigned usec)
+{
+ struct mono_time current, end;
+
+ timer_monotonic_get(&current);
+ end = current;
+ mono_time_add_usecs(&end, usec);
+
+ if (mono_time_after(&current, &end)) {
+ printk(BIOS_EMERG, "udelay: 0x%08x is impossibly large\n",
+ usec);
+ /* There's not much we can do if usec is too big. Use a long,
+ * paranoid delay value and hope for the best... */
+ end = current;
+ mono_time_add_usecs(&end, USECS_PER_SEC);
+ }
+
+ while (mono_time_before(&current, &end))
+ timer_monotonic_get(&current);
+}