1 files changed, 89 insertions, 0 deletions

diff --git a/arch/mips/galileo-boards/ev96100/time.c b/arch/mips/galileo-boards/ev96100/time.c
new file mode 100644
index 000000000000..bff5b1c174e4
--- /dev/null
+++ b/arch/mips/galileo-boards/ev96100/time.c
@@ -0,0 +1,89 @@
+/*
+ * BRIEF MODULE DESCRIPTION
+ *      Galileo EV96100 rtc routines.
+ *
+ * Copyright 2000 MontaVista Software Inc.
+ * Author: MontaVista Software, Inc.
+ *              ppopov@mvista.com or source@mvista.com
+ *
+ * This file was derived from Carsten Langgaard's
+ * arch/mips/mips-boards/atlas/atlas_rtc.c.
+ *
+ * Carsten Langgaard, carstenl@mips.com
+ * Copyright (C) 1999,2000 MIPS Technologies, Inc.  All rights reserved.
+ *
+ *  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  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
+ *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
+ *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
+ *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
+ *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
+ *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ *  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.,
+ *  675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+#include <linux/config.h>
+#include <linux/init.h>
+#include <linux/kernel_stat.h>
+#include <linux/module.h>
+#include <linux/sched.h>
+#include <linux/spinlock.h>
+#include <linux/timex.h>
+
+#include <asm/mipsregs.h>
+#include <asm/ptrace.h>
+#include <asm/time.h>
+
+
+#define ALLINTS (IE_IRQ0 | IE_IRQ1 | IE_IRQ2 | IE_IRQ3 | IE_IRQ4 | IE_IRQ5)
+
+extern volatile unsigned long wall_jiffies;
+unsigned long missed_heart_beats = 0;
+
+static unsigned long r4k_offset; /* Amount to increment compare reg each time */
+static unsigned long r4k_cur;    /* What counter should be at next timer irq */
+
+static inline void ack_r4ktimer(unsigned long newval)
+{
+        write_c0_compare(newval);
+}
+
+/*
+ * There are a lot of conceptually broken versions of the MIPS timer interrupt
+ * handler floating around.  This one is rather different, but the algorithm
+ * is probably more robust.
+ */
+void mips_timer_interrupt(struct pt_regs *regs)
+{
+        int irq = 7; /* FIX ME */
+
+        if (r4k_offset == 0) {
+            goto null;
+        }
+
+        do {
+                kstat_this_cpu.irqs[irq]++;
+                do_timer(regs);
+#ifndef CONFIG_SMP
+                update_process_times(user_mode(regs));
+#endif
+                r4k_cur += r4k_offset;
+                ack_r4ktimer(r4k_cur);
+
+        } while (((unsigned long)read_c0_count()
+                    - r4k_cur) < 0x7fffffff);
+        return;
+
+null:
+        ack_r4ktimer(0);
+}