1 files changed, 138 insertions, 0 deletions
diff --git a/cpu/mpc85xx/interrupts.c b/cpu/mpc85xx/interrupts.c
new file mode 100644
index 0000000..745b3b2
--- /dev/null
+++ b/cpu/mpc85xx/interrupts.c
@@ -0,0 +1,138 @@
+/*
+ * (C) Copyright 2000-2002
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * (C) Copyright 2002 (440 port)
+ * Scott McNutt, Artesyn Communication Producs, smcnutt@artsyncp.com
+ *
+ * (C) Copyright 2003 Motorola Inc. (MPC85xx port)
+ * Xianghua Xiao (X.Xiao@motorola.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 <watchdog.h>
+#include <command.h>
+#include <asm/processor.h>
+#include <ppc_asm.tmpl>
+
+unsigned decrementer_count;		/* count value for 1e6/HZ microseconds */
+
+static __inline__ unsigned long get_msr(void)
+{
+	unsigned long msr;
+
+	asm volatile("mfmsr %0" : "=r" (msr) :);
+	return msr;
+}
+
+static __inline__ void set_msr(unsigned long msr)
+{
+	asm volatile("mtmsr %0" : : "r" (msr));
+	asm volatile("isync");
+}
+
+void enable_interrupts (void)
+{
+	set_msr (get_msr() | MSR_EE);
+}
+
+/* returns flag if MSR_EE was set before */
+int disable_interrupts (void)
+{
+	ulong msr = get_msr();
+	set_msr (msr & ~MSR_EE);
+	return ((msr & MSR_EE) != 0);
+}
+
+/* interrupt is not supported yet */
+int interrupt_init (void)
+{
+	return (0);
+}
+
+/*
+ * Install and free a interrupt handler. Not implemented yet.
+ */
+
+void
+irq_install_handler(int vec, interrupt_handler_t *handler, void *arg)
+{
+	return;
+}
+
+void
+irq_free_handler(int vec)
+{
+	return;
+}
+
+/****************************************************************************/
+
+
+volatile ulong timestamp = 0;
+
+/*
+ * timer_interrupt - gets called when the decrementer overflows,
+ * with interrupts disabled.
+ * Trivial implementation - no need to be really accurate.
+ */
+void timer_interrupt(struct pt_regs *regs)
+{
+	printf ("*** Timer Interrupt *** ");
+	timestamp++;
+
+#if defined(CONFIG_WATCHDOG)
+	if ((timestamp % 1000) == 0)
+		reset_85xx_watchdog();
+#endif /* CONFIG_WATCHDOG */
+}
+
+void reset_timer (void)
+{
+	timestamp = 0;
+}
+
+ulong get_timer (ulong base)
+{
+	return (timestamp - base);
+}
+
+void set_timer (ulong t)
+{
+	timestamp = t;
+}
+
+#if (CONFIG_COMMANDS & CFG_CMD_IRQ)
+
+/*******************************************************************************
+ *
+ * irqinfo - print information about PCI devices,not implemented.
+ *
+ */
+int
+do_irqinfo(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
+{
+	printf ("\nInterrupt-unsupported:\n");
+
+	return 0;
+}
+
+#endif  /* CONFIG_COMMANDS & CFG_CMD_IRQ */