*/
#include <common.h>
-#include <div64.h>
DECLARE_GLOBAL_DATA_PTR;
return 0;
}
-
-/* The Integrator/CP timer1 is clocked at 1MHz
- * can be divided by 16 or 256
- * and can be set up as a 32-bit timer
- */
-/* U-Boot expects a 32 bit timer, running at CONFIG_SYS_HZ */
-/* Keep total timer count to avoid losing decrements < div_timer */
-static unsigned long long total_count = 0;
-static unsigned long long lastdec; /* Timer reading at last call */
-static unsigned long long div_clock = 1; /* Divisor applied to timer clock */
-static unsigned long long div_timer = 1; /* Divisor to convert timer reading
- * change to U-Boot ticks
- */
-/* CONFIG_SYS_HZ = CONFIG_SYS_HZ_CLOCK/(div_clock * div_timer) */
-static ulong timestamp; /* U-Boot ticks since startup */
-
-#define TIMER_LOAD_VAL ((ulong)0xFFFFFFFF)
-#define READ_TIMER (*(volatile ulong *)(CONFIG_SYS_TIMERBASE+4))
-
-/* all function return values in U-Boot ticks i.e. (1/CONFIG_SYS_HZ) sec
- * - unless otherwise stated
- */
-
-/* starts up a counter
- * - the Integrator/CP timer can be set up to issue an interrupt */
-int timer_init (void)
-{
- /* Load timer with initial value */
- *(volatile ulong *)(CONFIG_SYS_TIMERBASE + 0) = TIMER_LOAD_VAL;
- /* Set timer to be
- * enabled 1
- * periodic 1
- * no interrupts 0
- * X 0
- * divider 1 00 == less rounding error
- * 32 bit 1
- * wrapping 0
- */
- *(volatile ulong *)(CONFIG_SYS_TIMERBASE + 8) = 0x000000C2;
- /* init the timestamp */
- total_count = 0ULL;
- reset_timer_masked();
-
- div_timer = (unsigned long long)(CONFIG_SYS_HZ_CLOCK / CONFIG_SYS_HZ);
- div_timer /= div_clock;
-
- return (0);
-}
-
-/*
- * timer without interrupts
- */
-void reset_timer (void)
-{
- reset_timer_masked ();
-}
-
-ulong get_timer (ulong base_ticks)
-{
- return get_timer_masked () - base_ticks;
-}
-
-void set_timer (ulong ticks)
-{
- timestamp = ticks;
- total_count = (unsigned long long)ticks * div_timer;
-}
-
-/* delay usec useconds */
-void udelay (unsigned long usec)
-{
- ulong tmo, tmp;
-
- /* Convert to U-Boot ticks */
- tmo = usec * CONFIG_SYS_HZ;
- tmo /= (1000000L);
-
- tmp = get_timer_masked(); /* get current timestamp */
- tmo += tmp; /* form target timestamp */
-
- while (get_timer_masked () < tmo) {/* loop till event */
- /*NOP*/;
- }
-}
-
-void reset_timer_masked (void)
-{
- /* capure current decrementer value */
- lastdec = (unsigned long long)READ_TIMER;
- /* start "advancing" time stamp from 0 */
- timestamp = 0L;
-}
-
-/* converts the timer reading to U-Boot ticks */
-/* the timestamp is the number of ticks since reset */
-ulong get_timer_masked (void)
-{
- /* get current count */
- unsigned long long now = (unsigned long long)READ_TIMER;
-
- if(now > lastdec) {
- /* Must have wrapped */
- total_count += lastdec + TIMER_LOAD_VAL + 1 - now;
- } else {
- total_count += lastdec - now;
- }
- lastdec = now;
-
- /* Reuse "now" */
- now = total_count;
- do_div(now, div_timer);
- timestamp = now;
-
- return timestamp;
-}
-
-/* waits specified delay value and resets timestamp */
-void udelay_masked (unsigned long usec)
-{
- udelay(usec);
-}
-
-/*
- * 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 (unsigned long long)get_timer(0);
-}
-
-/*
- * Return the timebase clock frequency
- * i.e. how often the timer decrements
- */
-ulong get_tbclk (void)
-{
- return (ulong)(((unsigned long long)CONFIG_SYS_HZ_CLOCK)/div_clock);
-}
--- /dev/null
+/*
+ * (C) Copyright 2002
+ * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
+ * Marius Groeger <mgroeger@sysgo.de>
+ *
+ * (C) Copyright 2002
+ * David Mueller, ELSOFT AG, <d.mueller@elsoft.ch>
+ *
+ * (C) Copyright 2003
+ * Texas Instruments, <www.ti.com>
+ * Kshitij Gupta <Kshitij@ti.com>
+ *
+ * (C) Copyright 2004
+ * ARM Ltd.
+ * Philippe Robin, <philippe.robin@arm.com>
+ *
+ * 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 <div64.h>
+
+/* The Integrator/CP timer1 is clocked at 1MHz
+ * can be divided by 16 or 256
+ * and can be set up as a 32-bit timer
+ */
+/* U-Boot expects a 32 bit timer, running at CONFIG_SYS_HZ */
+/* Keep total timer count to avoid losing decrements < div_timer */
+static unsigned long long total_count = 0;
+static unsigned long long lastdec; /* Timer reading at last call */
+static unsigned long long div_clock = 1; /* Divisor applied to timer clock */
+static unsigned long long div_timer = 1; /* Divisor to convert timer reading
+ * change to U-Boot ticks
+ */
+/* CONFIG_SYS_HZ = CONFIG_SYS_HZ_CLOCK/(div_clock * div_timer) */
+static ulong timestamp; /* U-Boot ticks since startup */
+
+#define TIMER_LOAD_VAL ((ulong)0xFFFFFFFF)
+#define READ_TIMER (*(volatile ulong *)(CONFIG_SYS_TIMERBASE+4))
+
+/* all function return values in U-Boot ticks i.e. (1/CONFIG_SYS_HZ) sec
+ * - unless otherwise stated
+ */
+
+/* starts up a counter
+ * - the Integrator/CP timer can be set up to issue an interrupt */
+int timer_init (void)
+{
+ /* Load timer with initial value */
+ *(volatile ulong *)(CONFIG_SYS_TIMERBASE + 0) = TIMER_LOAD_VAL;
+ /* Set timer to be
+ * enabled 1
+ * periodic 1
+ * no interrupts 0
+ * X 0
+ * divider 1 00 == less rounding error
+ * 32 bit 1
+ * wrapping 0
+ */
+ *(volatile ulong *)(CONFIG_SYS_TIMERBASE + 8) = 0x000000C2;
+ /* init the timestamp */
+ total_count = 0ULL;
+ reset_timer_masked();
+
+ div_timer = (unsigned long long)(CONFIG_SYS_HZ_CLOCK / CONFIG_SYS_HZ);
+ div_timer /= div_clock;
+
+ return (0);
+}
+
+/*
+ * timer without interrupts
+ */
+void reset_timer (void)
+{
+ reset_timer_masked ();
+}
+
+ulong get_timer (ulong base_ticks)
+{
+ return get_timer_masked () - base_ticks;
+}
+
+void set_timer (ulong ticks)
+{
+ timestamp = ticks;
+ total_count = (unsigned long long)ticks * div_timer;
+}
+
+/* delay usec useconds */
+void udelay (unsigned long usec)
+{
+ ulong tmo, tmp;
+
+ /* Convert to U-Boot ticks */
+ tmo = usec * CONFIG_SYS_HZ;
+ tmo /= (1000000L);
+
+ tmp = get_timer_masked(); /* get current timestamp */
+ tmo += tmp; /* form target timestamp */
+
+ while (get_timer_masked () < tmo) {/* loop till event */
+ /*NOP*/;
+ }
+}
+
+void reset_timer_masked (void)
+{
+ /* capure current decrementer value */
+ lastdec = (unsigned long long)READ_TIMER;
+ /* start "advancing" time stamp from 0 */
+ timestamp = 0L;
+}
+
+/* converts the timer reading to U-Boot ticks */
+/* the timestamp is the number of ticks since reset */
+ulong get_timer_masked (void)
+{
+ /* get current count */
+ unsigned long long now = (unsigned long long)READ_TIMER;
+
+ if(now > lastdec) {
+ /* Must have wrapped */
+ total_count += lastdec + TIMER_LOAD_VAL + 1 - now;
+ } else {
+ total_count += lastdec - now;
+ }
+ lastdec = now;
+
+ /* Reuse "now" */
+ now = total_count;
+ do_div(now, div_timer);
+ timestamp = now;
+
+ return timestamp;
+}
+
+/* waits specified delay value and resets timestamp */
+void udelay_masked (unsigned long usec)
+{
+ udelay(usec);
+}
+
+/*
+ * 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 (unsigned long long)get_timer(0);
+}
+
+/*
+ * Return the timebase clock frequency
+ * i.e. how often the timer decrements
+ */
+ulong get_tbclk (void)
+{
+ return (ulong)(((unsigned long long)CONFIG_SYS_HZ_CLOCK)/div_clock);
+}
projects / oweals / u-boot.git / commitdiff