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Diffstat (limited to 'arch/m68k/bvme6000/bvmeints.c')
-rw-r--r--arch/m68k/bvme6000/bvmeints.c160
1 files changed, 160 insertions, 0 deletions
diff --git a/arch/m68k/bvme6000/bvmeints.c b/arch/m68k/bvme6000/bvmeints.c
new file mode 100644
index 000000000000..298a8df02664
--- /dev/null
+++ b/arch/m68k/bvme6000/bvmeints.c
@@ -0,0 +1,160 @@
+/*
+ * arch/m68k/bvme6000/bvmeints.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 bvme6000_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 bvme6000_init_IRQ (void)
+ *
+ * Parameters: None
+ *
+ * Returns: Nothing
+ *
+ * This function is called during kernel startup to initialize
+ * the bvme6000 IRQ handling routines.
+ */
+
+void bvme6000_init_IRQ (void)
+{
+ int i;
+
+ for (i = 0; i < 256; i++) {
+ irq_tab[i].handler = bvme6000_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 bvme6000_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 0
+ /* Nothing special about auto-vectored devices for the BVME6000,
+ * but treat it specially to avoid changes elsewhere.
+ */
+
+ if (irq >= VEC_INT1 && irq <= VEC_INT7)
+ return cpu_request_irq(irq - VEC_SPUR, handler, flags,
+ devname, dev_id);
+#endif
+ 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 bvme6000_free_irq(unsigned int irq, void *dev_id)
+{
+ if (irq > 255) {
+ printk("%s: Incorrect IRQ %d\n", __FUNCTION__, irq);
+ return;
+ }
+#if 0
+ if (irq >= VEC_INT1 && irq <= VEC_INT7) {
+ cpu_free_irq(irq - VEC_SPUR, dev_id);
+ return;
+ }
+#endif
+ 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 = bvme6000_defhand;
+ irq_tab[irq].flags = IRQ_FLG_STD;
+ irq_tab[irq].dev_id = NULL;
+ irq_tab[irq].devname = NULL;
+}
+
+irqreturn_t bvme6000_process_int (unsigned long vec, struct pt_regs *fp)
+{
+ if (vec > 255) {
+ printk ("bvme6000_process_int: Illegal vector %ld", 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_bvme6000_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 bvme6000_defhand (int irq, void *dev_id, struct pt_regs *fp)
+{
+ printk ("Unknown interrupt 0x%02x\n", irq);
+ return IRQ_NONE;
+}
+
+void bvme6000_enable_irq (unsigned int irq)
+{
+}
+
+
+void bvme6000_disable_irq (unsigned int irq)
+{
+}
+