1 files changed, 160 insertions, 0 deletions

diff --git a/arch/ppc/amiga/ints.c b/arch/ppc/amiga/ints.c
new file mode 100644
index 000000000000..5d318e498f06
--- /dev/null
+++ b/arch/ppc/amiga/ints.c
@@ -0,0 +1,160 @@
+/*
+ *  arch/ppc/amiga/ints.c
+ *
+ *  Linux/m68k general interrupt handling code from arch/m68k/kernel/ints.c
+ *  Needed to drive the m68k emulating IRQ hardware on the PowerUp boards.
+ */
+
+#include <linux/types.h>
+#include <linux/sched.h>
+#include <linux/kernel_stat.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/seq_file.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>
+
+/* table for system interrupt handlers */
+static irq_handler_t irq_list[SYS_IRQS];
+
+static const char *default_names[SYS_IRQS] = {
+        "spurious int", "int1 handler", "int2 handler", "int3 handler",
+        "int4 handler", "int5 handler", "int6 handler", "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];
+
+
+/*
+ * void init_IRQ(void)
+ *
+ * Parameters:  None
+ *
+ * Returns:     Nothing
+ *
+ * This function should be called during kernel startup to initialize
+ * the IRQ handling routines.
+ */
+
+__init
+void m68k_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;
+}
+
+int sys_request_irq(unsigned int irq,
+                    void (*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 sys_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];
+}
+
+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 m68k_get_irq_list(struct seq_file *p, void *v)
+{
+        int i;
+
+        /* autovector interrupts */
+        if (mach_default_handler) {
+                for (i = 0; i < SYS_IRQS; i++) {
+                        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);
+                }
+        }
+
+        mach_get_irq_list(p, v);
+        return 0;
+}