1 files changed, 149 insertions, 0 deletions

diff --git a/arch/m68k/mvme16x/16xints.c b/arch/m68k/mvme16x/16xints.c
new file mode 100644
index 000000000000..793ef735b59c
--- /dev/null
+++ b/arch/m68k/mvme16x/16xints.c
@@ -0,0 +1,149 @@
+/*
+ * arch/m68k/mvme16x/16xints.c
+ *
+ * Copyright (C) 1995 Richard Hirst [richard@sleepie.demon.co.uk]
+ *
+ * based on amiints.c -- Amiga Linux interrupt handling code
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file README.legal in the main directory of this archive
+ * for more details.
+ *
+ */
+
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/seq_file.h>
+
+#include <asm/system.h>
+#include <asm/ptrace.h>
+#include <asm/irq.h>
+
+static irqreturn_t mvme16x_defhand (int irq, void *dev_id, struct pt_regs *fp);
+
+/*
+ * This should ideally be 4 elements only, for speed.
+ */
+
+static struct {
+        irqreturn_t     (*handler)(int, void *, struct pt_regs *);
+        unsigned long   flags;
+        void            *dev_id;
+        const char      *devname;
+        unsigned        count;
+} irq_tab[192];
+
+/*
+ * void mvme16x_init_IRQ (void)
+ *
+ * Parameters:  None
+ *
+ * Returns:     Nothing
+ *
+ * This function is called during kernel startup to initialize
+ * the mvme16x IRQ handling routines.  Should probably ensure
+ * that the base vectors for the VMEChip2 and PCCChip2 are valid.
+ */
+
+void mvme16x_init_IRQ (void)
+{
+        int i;
+
+        for (i = 0; i < 192; i++) {
+                irq_tab[i].handler = mvme16x_defhand;
+                irq_tab[i].flags = IRQ_FLG_STD;
+                irq_tab[i].dev_id = NULL;
+                irq_tab[i].devname = NULL;
+                irq_tab[i].count = 0;
+        }
+}
+
+int mvme16x_request_irq(unsigned int irq,
+                irqreturn_t (*handler)(int, void *, struct pt_regs *),
+                unsigned long flags, const char *devname, void *dev_id)
+{
+        if (irq < 64 || irq > 255) {
+                printk("%s: Incorrect IRQ %d from %s\n", __FUNCTION__, irq, devname);
+                return -ENXIO;
+        }
+
+        if (!(irq_tab[irq-64].flags & IRQ_FLG_STD)) {
+                if (irq_tab[irq-64].flags & IRQ_FLG_LOCK) {
+                        printk("%s: IRQ %d from %s is not replaceable\n",
+                               __FUNCTION__, irq, irq_tab[irq-64].devname);
+                        return -EBUSY;
+                }
+                if (flags & IRQ_FLG_REPLACE) {
+                        printk("%s: %s can't replace IRQ %d from %s\n",
+                               __FUNCTION__, devname, irq, irq_tab[irq-64].devname);
+                        return -EBUSY;
+                }
+        }
+        irq_tab[irq-64].handler = handler;
+        irq_tab[irq-64].flags   = flags;
+        irq_tab[irq-64].dev_id  = dev_id;
+        irq_tab[irq-64].devname = devname;
+        return 0;
+}
+
+void mvme16x_free_irq(unsigned int irq, void *dev_id)
+{
+        if (irq < 64 || irq > 255) {
+                printk("%s: Incorrect IRQ %d\n", __FUNCTION__, irq);
+                return;
+        }
+
+        if (irq_tab[irq-64].dev_id != dev_id)
+                printk("%s: Removing probably wrong IRQ %d from %s\n",
+                       __FUNCTION__, irq, irq_tab[irq-64].devname);
+
+        irq_tab[irq-64].handler = mvme16x_defhand;
+        irq_tab[irq-64].flags   = IRQ_FLG_STD;
+        irq_tab[irq-64].dev_id  = NULL;
+        irq_tab[irq-64].devname = NULL;
+}
+
+irqreturn_t mvme16x_process_int (unsigned long vec, struct pt_regs *fp)
+{
+        if (vec < 64 || vec > 255) {
+                printk ("mvme16x_process_int: Illegal vector %ld", vec);
+                return IRQ_NONE;
+        } else {
+                irq_tab[vec-64].count++;
+                irq_tab[vec-64].handler(vec, irq_tab[vec-64].dev_id, fp);
+                return IRQ_HANDLED;
+        }
+}
+
+int show_mvme16x_interrupts (struct seq_file *p, void *v)
+{
+        int i;
+
+        for (i = 0; i < 192; i++) {
+                if (irq_tab[i].count)
+                        seq_printf(p, "Vec 0x%02x: %8d  %s\n",
+                            i+64, irq_tab[i].count,
+                            irq_tab[i].devname ? irq_tab[i].devname : "free");
+        }
+        return 0;
+}
+
+
+static irqreturn_t mvme16x_defhand (int irq, void *dev_id, struct pt_regs *fp)
+{
+        printk ("Unknown interrupt 0x%02x\n", irq);
+        return IRQ_NONE;
+}
+
+
+void mvme16x_enable_irq (unsigned int irq)
+{
+}
+
+
+void mvme16x_disable_irq (unsigned int irq)
+{
+}
+
+