patch-2.1.87 linux/arch/m68k/mvme16x/16xints.c

• Lines: 145
• Date: Thu Feb 12 16:30:13 1998
• Orig file: v2.1.86/linux/arch/m68k/mvme16x/16xints.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.1.86/linux/arch/m68k/mvme16x/16xints.c linux/arch/m68k/mvme16x/16xints.c
@@ -0,0 +1,144 @@
+/*
+ * 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/config.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+
+#include <asm/system.h>
+#include <asm/ptrace.h>
+#include <asm/irq.h>
+
+static void mvme16x_defhand (int irq, void *dev_id, struct pt_regs *fp);
+
+/*
+ * This should ideally be 4 elements only, for speed.
+ */
+
+static struct {
+	void		(*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,
+		void (*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;
+}
+
+void mvme16x_process_int (unsigned long vec, struct pt_regs *fp)
+{
+	if (vec < 64 || vec > 255)
+		panic ("mvme16x_process_int: Illegal vector %ld", vec);
+	irq_tab[vec-64].count++;
+	irq_tab[vec-64].handler(vec, irq_tab[vec-64].dev_id, fp);
+}
+
+int mvme16x_get_irq_list (char *buf)
+{
+	int i, len = 0;
+
+	for (i = 0; i < 192; i++) {
+		if (irq_tab[i].count)
+			len += sprintf (buf+len, "Vec 0x%02x: %8d  %s\n",
+			    i+64, irq_tab[i].count,
+			    irq_tab[i].devname ? irq_tab[i].devname : "free");
+	}
+	return len;
+}
+
+
+static void mvme16x_defhand (int irq, void *dev_id, struct pt_regs *fp)
+{
+	panic ("Unknown interrupt 0x%02x", irq);
+}
+
+
+void mvme16x_enable_irq (unsigned int irq)
+{
+}
+
+
+void mvme16x_disable_irq (unsigned int irq)
+{
+}
+
+