1 files changed, 129 insertions, 0 deletions
diff --git a/package/boot/uboot-oxnas/files/arch/arm/cpu/arm1136/nas782x/timer.c b/package/boot/uboot-oxnas/files/arch/arm/cpu/arm1136/nas782x/timer.c
new file mode 100644
index 0000000..5e87608
--- /dev/null
+++ b/package/boot/uboot-oxnas/files/arch/arm/cpu/arm1136/nas782x/timer.c
@@ -0,0 +1,129 @@
+/*
+ * (C) Copyright 2004
+ * Texas Instruments
+ * Richard Woodruff <r-woodruff2@ti.com>
+ *
+ * (C) Copyright 2002
+ * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
+ * Marius Groeger <mgroeger@sysgo.de>
+ * Alex Zuepke <azu@sysgo.de>
+ *
+ * (C) Copyright 2002
+ * Gary Jennejohn, DENX Software Engineering, <garyj@denx.de>
+ *
+ * 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 <common.h>
+#include <asm/io.h>
+
+#define TIMER_CLOCK	(CONFIG_SYS_CLK_FREQ / (1 << (CONFIG_TIMER_PRESCALE * 4)))
+#define TIMER_LOAD_VAL 0xFFFFFF
+
+/* macro to read the 32 bit timer */
+#define READ_TIMER	(TIMER_LOAD_VAL - readl(CONFIG_SYS_TIMERBASE + TIMER_CURR)) \
+			/ (TIMER_CLOCK / CONFIG_SYS_HZ)
+
+#define READ_TIMER_HW	(TIMER_LOAD_VAL - readl(CONFIG_SYS_TIMERBASE + TIMER_CURR))
+
+DECLARE_GLOBAL_DATA_PTR;
+
+int timer_init (void)
+{
+	int32_t val;
+
+	/* Start the counter ticking up */
+	writel(TIMER_LOAD_VAL, CONFIG_SYS_TIMERBASE + TIMER_LOAD);	/* reload value on overflow*/
+
+	val = (CONFIG_TIMER_PRESCALE << TIMER_PRESCALE_SHIFT) |
+			(TIMER_MODE_PERIODIC << TIMER_MODE_SHIFT) |
+			(TIMER_ENABLE << TIMER_ENABLE_SHIFT);		/* mask to enable timer*/
+	writel(val, CONFIG_SYS_TIMERBASE + TIMER_CTRL);	/* start timer */
+
+	/* reset time */
+	gd->arch.lastinc = READ_TIMER;	/* capture current incrementer value */
+	gd->arch.tbl = 0;		/* start "advancing" time stamp */
+
+	return(0);
+}
+/*
+ * timer without interrupts
+ */
+ulong get_timer (ulong base)
+{
+	return get_timer_masked () - base;
+}
+
+/* delay x useconds AND preserve advance timestamp value */
+void __udelay (unsigned long usec)
+{
+	ulong tmo, tmp;
+
+	if (usec > 100000) {		/* if "big" number, spread normalization to seconds */
+		tmo = usec / 1000;	/* start to normalize for usec to ticks per sec */
+		tmo *= CONFIG_SYS_HZ;	/* find number of "ticks" to wait to achieve target */
+		tmo /= 1000;		/* finish normalize. */
+
+		tmp = get_timer (0);		/* get current timestamp */
+		while (get_timer (tmp) < tmo)/* loop till event */
+			/*NOP*/;
+	} else {			/* else small number, convert to hw ticks */
+		tmo = usec * (TIMER_CLOCK / 1000) / 1000;
+		/* timeout is no more than 0.1s, and the hw timer will roll over at most once */
+		tmp = READ_TIMER_HW;
+		while (((READ_TIMER_HW -tmp) & TIMER_LOAD_VAL) < tmo)/* loop till event */
+			/*NOP*/;
+	}
+}
+
+ulong get_timer_masked (void)
+{
+	ulong now = READ_TIMER;		/* current tick value */
+
+	if (now >= gd->arch.lastinc) {		/* normal mode (non roll) */
+		/* move stamp fordward with absoulte diff ticks */
+		gd->arch.tbl += (now - gd->arch.lastinc);
+	} else {
+		/* we have rollover of incrementer */
+		gd->arch.tbl += ((TIMER_LOAD_VAL / (TIMER_CLOCK / CONFIG_SYS_HZ))
+				 - gd->arch.lastinc) + now;
+	}
+	gd->arch.lastinc = now;
+	return gd->arch.tbl;
+}
+
+
+/*
+ * This function is derived from PowerPC code (read timebase as long long).
+ * On ARM it just returns the timer value.
+ */
+unsigned long long get_ticks(void)
+{
+	return get_timer(0);
+}
+/*
+ * This function is derived from PowerPC code (timebase clock frequency).
+ * On ARM it returns the number of timer ticks per second.
+ */
+ulong get_tbclk (void)
+{
+	ulong tbclk;
+	tbclk = CONFIG_SYS_HZ;
+	return tbclk;
+}