1 files changed, 281 insertions, 0 deletions

diff --git a/arch/m68k/kernel/ints.c b/arch/m68k/kernel/ints.c
new file mode 100644
index 000000000000..514d323ad536
--- /dev/null
+++ b/arch/m68k/kernel/ints.c
@@ -0,0 +1,281 @@
+/*
+ * linux/arch/m68k/kernel/ints.c -- Linux/m68k general interrupt handling code
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file COPYING in the main directory of this archive
+ * for more details.
+ *
+ * 07/03/96: Timer initialization, and thus mach_sched_init(),
+ *           removed from request_irq() and moved to init_time().
+ *           We should therefore consider renaming our add_isr() and
+ *           remove_isr() to request_irq() and free_irq()
+ *           respectively, so they are compliant with the other
+ *           architectures.                                     /Jes
+ * 11/07/96: Changed all add_/remove_isr() to request_/free_irq() calls.
+ *           Removed irq list support, if any machine needs an irq server
+ *           it must implement this itself (as it's already done), instead
+ *           only default handler are used with mach_default_handler.
+ *           request_irq got some flags different from other architectures:
+ *           - IRQ_FLG_REPLACE : Replace an existing handler (the default one
+ *                               can be replaced without this flag)
+ *           - IRQ_FLG_LOCK : handler can't be replaced
+ *           There are other machine depending flags, see there
+ *           If you want to replace a default handler you should know what
+ *           you're doing, since it might handle different other irq sources
+ *           which must be served                               /Roman Zippel
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/sched.h>
+#include <linux/kernel_stat.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+
+#include <asm/setup.h>
+#include <asm/system.h>
+#include <asm/irq.h>
+#include <asm/traps.h>
+#include <asm/page.h>
+#include <asm/machdep.h>
+
+#ifdef CONFIG_Q40
+#include <asm/q40ints.h>
+#endif
+
+/* table for system interrupt handlers */
+static irq_handler_t irq_list[SYS_IRQS];
+
+static const char *default_names[SYS_IRQS] = {
+        [0] = "spurious int",
+        [1] = "int1 handler",
+        [2] = "int2 handler",
+        [3] = "int3 handler",
+        [4] = "int4 handler",
+        [5] = "int5 handler",
+        [6] = "int6 handler",
+        [7] = "int7 handler"
+};
+
+/* The number of spurious interrupts */
+volatile unsigned int num_spurious;
+
+#define NUM_IRQ_NODES 100
+static irq_node_t nodes[NUM_IRQ_NODES];
+
+static void dummy_enable_irq(unsigned int irq);
+static void dummy_disable_irq(unsigned int irq);
+static int dummy_request_irq(unsigned int irq,
+                irqreturn_t (*handler) (int, void *, struct pt_regs *),
+                unsigned long flags, const char *devname, void *dev_id);
+static void dummy_free_irq(unsigned int irq, void *dev_id);
+
+void (*enable_irq) (unsigned int) = dummy_enable_irq;
+void (*disable_irq) (unsigned int) = dummy_disable_irq;
+
+int (*mach_request_irq) (unsigned int, irqreturn_t (*)(int, void *, struct pt_regs *),
+                      unsigned long, const char *, void *) = dummy_request_irq;
+void (*mach_free_irq) (unsigned int, void *) = dummy_free_irq;
+
+void init_irq_proc(void);
+
+/*
+ * void init_IRQ(void)
+ *
+ * Parameters:  None
+ *
+ * Returns:     Nothing
+ *
+ * This function should be called during kernel startup to initialize
+ * the IRQ handling routines.
+ */
+
+void __init init_IRQ(void)
+{
+        int i;
+
+        for (i = 0; i < SYS_IRQS; i++) {
+                if (mach_default_handler)
+                        irq_list[i].handler = (*mach_default_handler)[i];
+                irq_list[i].flags   = 0;
+                irq_list[i].dev_id  = NULL;
+                irq_list[i].devname = default_names[i];
+        }
+
+        for (i = 0; i < NUM_IRQ_NODES; i++)
+                nodes[i].handler = NULL;
+
+        mach_init_IRQ ();
+}
+
+irq_node_t *new_irq_node(void)
+{
+        irq_node_t *node;
+        short i;
+
+        for (node = nodes, i = NUM_IRQ_NODES-1; i >= 0; node++, i--)
+                if (!node->handler)
+                        return node;
+
+        printk ("new_irq_node: out of nodes\n");
+        return NULL;
+}
+
+/*
+ * We will keep these functions until I have convinced Linus to move
+ * the declaration of them from include/linux/sched.h to
+ * include/asm/irq.h.
+ */
+int request_irq(unsigned int irq,
+                irqreturn_t (*handler) (int, void *, struct pt_regs *),
+                unsigned long flags, const char *devname, void *dev_id)
+{
+        return mach_request_irq(irq, handler, flags, devname, dev_id);
+}
+
+EXPORT_SYMBOL(request_irq);
+
+void free_irq(unsigned int irq, void *dev_id)
+{
+        mach_free_irq(irq, dev_id);
+}
+
+EXPORT_SYMBOL(free_irq);
+
+int cpu_request_irq(unsigned int irq,
+                    irqreturn_t (*handler)(int, void *, struct pt_regs *),
+                    unsigned long flags, const char *devname, void *dev_id)
+{
+        if (irq < IRQ1 || irq > IRQ7) {
+                printk("%s: Incorrect IRQ %d from %s\n",
+                       __FUNCTION__, irq, devname);
+                return -ENXIO;
+        }
+
+#if 0
+        if (!(irq_list[irq].flags & IRQ_FLG_STD)) {
+                if (irq_list[irq].flags & IRQ_FLG_LOCK) {
+                        printk("%s: IRQ %d from %s is not replaceable\n",
+                               __FUNCTION__, irq, irq_list[irq].devname);
+                        return -EBUSY;
+                }
+                if (!(flags & IRQ_FLG_REPLACE)) {
+                        printk("%s: %s can't replace IRQ %d from %s\n",
+                               __FUNCTION__, devname, irq, irq_list[irq].devname);
+                        return -EBUSY;
+                }
+        }
+#endif
+
+        irq_list[irq].handler = handler;
+        irq_list[irq].flags   = flags;
+        irq_list[irq].dev_id  = dev_id;
+        irq_list[irq].devname = devname;
+        return 0;
+}
+
+void cpu_free_irq(unsigned int irq, void *dev_id)
+{
+        if (irq < IRQ1 || irq > IRQ7) {
+                printk("%s: Incorrect IRQ %d\n", __FUNCTION__, irq);
+                return;
+        }
+
+        if (irq_list[irq].dev_id != dev_id)
+                printk("%s: Removing probably wrong IRQ %d from %s\n",
+                       __FUNCTION__, irq, irq_list[irq].devname);
+
+        irq_list[irq].handler = (*mach_default_handler)[irq];
+        irq_list[irq].flags   = 0;
+        irq_list[irq].dev_id  = NULL;
+        irq_list[irq].devname = default_names[irq];
+}
+
+/*
+ * Do we need these probe functions on the m68k?
+ *
+ *  ... may be useful with ISA devices
+ */
+unsigned long probe_irq_on (void)
+{
+#ifdef CONFIG_Q40
+        if (MACH_IS_Q40)
+                return q40_probe_irq_on();
+#endif
+        return 0;
+}
+
+EXPORT_SYMBOL(probe_irq_on);
+
+int probe_irq_off (unsigned long irqs)
+{
+#ifdef CONFIG_Q40
+        if (MACH_IS_Q40)
+                return q40_probe_irq_off(irqs);
+#endif
+        return 0;
+}
+
+EXPORT_SYMBOL(probe_irq_off);
+
+static void dummy_enable_irq(unsigned int irq)
+{
+        printk("calling uninitialized enable_irq()\n");
+}
+
+static void dummy_disable_irq(unsigned int irq)
+{
+        printk("calling uninitialized disable_irq()\n");
+}
+
+static int dummy_request_irq(unsigned int irq,
+                irqreturn_t (*handler) (int, void *, struct pt_regs *),
+                unsigned long flags, const char *devname, void *dev_id)
+{
+        printk("calling uninitialized request_irq()\n");
+        return 0;
+}
+
+static void dummy_free_irq(unsigned int irq, void *dev_id)
+{
+        printk("calling uninitialized disable_irq()\n");
+}
+
+asmlinkage void process_int(unsigned long vec, struct pt_regs *fp)
+{
+        if (vec >= VEC_INT1 && vec <= VEC_INT7 && !MACH_IS_BVME6000) {
+                vec -= VEC_SPUR;
+                kstat_cpu(0).irqs[vec]++;
+                irq_list[vec].handler(vec, irq_list[vec].dev_id, fp);
+        } else {
+                if (mach_process_int)
+                        mach_process_int(vec, fp);
+                else
+                        panic("Can't process interrupt vector %ld\n", vec);
+                return;
+        }
+}
+
+int show_interrupts(struct seq_file *p, void *v)
+{
+        int i = *(loff_t *) v;
+
+        /* autovector interrupts */
+        if (i < SYS_IRQS) {
+                if (mach_default_handler) {
+                        seq_printf(p, "auto %2d: %10u ", i,
+                                       i ? kstat_cpu(0).irqs[i] : num_spurious);
+                        seq_puts(p, "  ");
+                        seq_printf(p, "%s\n", irq_list[i].devname);
+                }
+        } else if (i == SYS_IRQS)
+                mach_get_irq_list(p, v);
+        return 0;
+}
+
+void init_irq_proc(void)
+{
+        /* Insert /proc/irq driver here */
+}
+