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Diffstat (limited to 'arch/m68k/mvme147/147ints.c')
-rw-r--r--arch/m68k/mvme147/147ints.c145
1 files changed, 145 insertions, 0 deletions
diff --git a/arch/m68k/mvme147/147ints.c b/arch/m68k/mvme147/147ints.c
new file mode 100644
index 00000000000..69a744ee35a
--- /dev/null
+++ b/arch/m68k/mvme147/147ints.c
@@ -0,0 +1,145 @@
+/*
+ * arch/m68k/mvme147/147ints.c
+ *
+ * Copyright (C) 1997 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/ptrace.h>
+#include <asm/system.h>
+#include <asm/irq.h>
+#include <asm/traps.h>
+
+static irqreturn_t mvme147_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[256];
+
+/*
+ * void mvme147_init_IRQ (void)
+ *
+ * Parameters: None
+ *
+ * Returns: Nothing
+ *
+ * This function is called during kernel startup to initialize
+ * the mvme147 IRQ handling routines.
+ */
+
+void mvme147_init_IRQ (void)
+{
+ int i;
+
+ for (i = 0; i < 256; i++) {
+ irq_tab[i].handler = mvme147_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 mvme147_request_irq(unsigned int irq,
+ irqreturn_t (*handler)(int, void *, struct pt_regs *),
+ unsigned long flags, const char *devname, void *dev_id)
+{
+ if (irq > 255) {
+ printk("%s: Incorrect IRQ %d from %s\n", __FUNCTION__, irq, devname);
+ return -ENXIO;
+ }
+ if (!(irq_tab[irq].flags & IRQ_FLG_STD)) {
+ if (irq_tab[irq].flags & IRQ_FLG_LOCK) {
+ printk("%s: IRQ %d from %s is not replaceable\n",
+ __FUNCTION__, irq, irq_tab[irq].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].devname);
+ return -EBUSY;
+ }
+ }
+ irq_tab[irq].handler = handler;
+ irq_tab[irq].flags = flags;
+ irq_tab[irq].dev_id = dev_id;
+ irq_tab[irq].devname = devname;
+ return 0;
+}
+
+void mvme147_free_irq(unsigned int irq, void *dev_id)
+{
+ if (irq > 255) {
+ printk("%s: Incorrect IRQ %d\n", __FUNCTION__, irq);
+ return;
+ }
+ if (irq_tab[irq].dev_id != dev_id)
+ printk("%s: Removing probably wrong IRQ %d from %s\n",
+ __FUNCTION__, irq, irq_tab[irq].devname);
+
+ irq_tab[irq].handler = mvme147_defhand;
+ irq_tab[irq].flags = IRQ_FLG_STD;
+ irq_tab[irq].dev_id = NULL;
+ irq_tab[irq].devname = NULL;
+}
+
+irqreturn_t mvme147_process_int (unsigned long vec, struct pt_regs *fp)
+{
+ if (vec > 255) {
+ printk ("mvme147_process_int: Illegal vector %ld\n", vec);
+ return IRQ_NONE;
+ } else {
+ irq_tab[vec].count++;
+ irq_tab[vec].handler(vec, irq_tab[vec].dev_id, fp);
+ return IRQ_HANDLED;
+ }
+}
+
+int show_mvme147_interrupts (struct seq_file *p, void *v)
+{
+ int i;
+
+ for (i = 0; i < 256; i++) {
+ if (irq_tab[i].count)
+ seq_printf(p, "Vec 0x%02x: %8d %s\n",
+ i, irq_tab[i].count,
+ irq_tab[i].devname ? irq_tab[i].devname : "free");
+ }
+ return 0;
+}
+
+
+static irqreturn_t mvme147_defhand (int irq, void *dev_id, struct pt_regs *fp)
+{
+ printk ("Unknown interrupt 0x%02x\n", irq);
+ return IRQ_NONE;
+}
+
+void mvme147_enable_irq (unsigned int irq)
+{
+}
+
+
+void mvme147_disable_irq (unsigned int irq)
+{
+}
+