* Patch by Bernhard Kuhn, 28 Nov 2003:

  add support for Coldfire CPU
  add support for Motorola M5272C3 and M5282EVB boards

1 files changed, 127 insertions, 0 deletions

diff --git a/cpu/coldfire/interrupts.c b/cpu/coldfire/interrupts.c
new file mode 100644
index 0000000..3861ff1
--- /dev/null
+++ b/cpu/coldfire/interrupts.c
@@ -0,0 +1,127 @@
+/*
+ * (C) Copyright 2000-2003
+ * Wolfgang Denk, DENX Software Engineering, wd@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 <watchdog.h>
+#ifdef CONFIG_M5272
+#include <asm/m5272.h>
+#endif
+#ifdef CONFIG_M5282
+#include <asm/m5282.h>
+#endif
+#include <asm/mcftimer.h>
+#include <asm/processor.h>
+#include <commproc.h>
+
+static ulong timestamp;
+static unsigned short lastinc;
+
+void coldfire_timer_init (void)
+{
+	volatile unsigned short *timerp;
+
+	timerp = (volatile unsigned short *) (MCF_MBAR + MCFTIMER_BASE4);
+	timestamp = 0;
+
+#ifdef CONFIG_M5272
+	/* Set up TIMER 4 as poll clock */
+	timerp[MCFTIMER_TMR] = MCFTIMER_TMR_DISABLE;
+	timerp[MCFTIMER_TRR] = lastinc = 0;
+	timerp[MCFTIMER_TMR] = (65 << 8) | MCFTIMER_TMR_CLK1 |
+		MCFTIMER_TMR_FREERUN | MCFTIMER_TMR_ENABLE;
+#endif
+
+#ifdef CONFIG_M5282
+	/* Set up TIMER 4 as poll clock */
+	timerp[MCFTIMER_PCSR] = MCFTIMER_PCSR_OVW;
+	timerp[MCFTIMER_PMR] = lastinc = 0;
+	timerp[MCFTIMER_PCSR] =
+		(5 << 8) | MCFTIMER_PCSR_EN | MCFTIMER_PCSR_OVW;
+#endif
+}
+
+
+void irq_install_handler (int vec, interrupt_handler_t * handler, void *arg)
+{
+}
+void irq_free_handler (int vec)
+{
+}
+
+int interrupt_init (void)
+{
+	coldfire_timer_init ();
+	return 0;
+}
+
+void enable_interrupts ()
+{
+}
+int disable_interrupts ()
+{
+	return 0;
+}
+
+void set_timer (ulong t)
+{
+	volatile unsigned short *timerp;
+
+	timerp = (volatile unsigned short *) (MCF_MBAR + MCFTIMER_BASE4);
+	timestamp = 0;
+
+#ifdef CONFIG_M5272
+	timerp[MCFTIMER_TRR] = lastinc = 0;
+#endif
+
+#ifdef CONFIG_M5282
+	timerp[MCFTIMER_PMR] = lastinc = 0;
+#endif
+}
+
+ulong get_timer (ulong base)
+{
+	unsigned short now, diff;
+	volatile unsigned short *timerp;
+
+	timerp = (volatile unsigned short *) (MCF_MBAR + MCFTIMER_BASE4);
+
+#ifdef CONFIG_M5272
+	now = timerp[MCFTIMER_TCN];
+	diff = (now - lastinc);
+#endif
+
+#ifdef CONFIG_M5282
+	now = timerp[MCFTIMER_PCNTR];
+	diff = -(now - lastinc);
+#endif
+
+	timestamp += diff;
+	lastinc = now;
+	return timestamp - base;
+}
+
+void wait_ticks (unsigned long ticks)
+{
+	set_timer (0);
+	while (get_timer (0) < ticks);
+}