1 files changed, 55 insertions, 0 deletions
diff --git a/include/asm-blackfin/delay.h b/include/asm-blackfin/delay.h
new file mode 100644
index 0000000000..dbb73887ef
--- /dev/null
+++ b/include/asm-blackfin/delay.h
@@ -0,0 +1,55 @@
+/*
+ * U-boot - delay.h Routines for introducing delays
+ *
+ * Copyright (c) 2005 blackfin.uclinux.org
+ *
+ * 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
+ */
+
+#ifndef _BLACKFIN_DELAY_H
+#define _BLACKFIN_DELAY_H
+
+/*
+ * Changes made by akbar.hussain@Lineo.com, for BLACKFIN
+ * Copyright (C) 1994 Hamish Macdonald
+ *
+ * Delay routines, using a pre-computed "loops_per_second" value.
+ */
+
+extern __inline__ void __delay(unsigned long loops)
+{
+	__asm__ __volatile__("1:\t%0 += -1;\n\t"
+				"cc = %0 == 0;\n\t"
+				"if ! cc jump 1b;\n":"=d"(loops)
+				:"0"(loops));
+}
+
+/*
+ * Use only for very small delays ( < 1 msec).  Should probably use a
+ * lookup table, really, as the multiplications take much too long with
+ * short delays.  This is a "reasonable" implementation, though (and the
+ * first constant multiplications gets optimized away if the delay is
+ * a constant)
+ */
+extern __inline__ void udelay(unsigned long usecs)
+{
+	__delay(usecs);
+}
+
+#endif