[PATCH] create m68knommu/coldfire specific ints.c

Create a m68knommu/ColdFire specific ints.c. It is just simpler to
have one for each sub-architecture (which means we currently need 3
for the 3 prominant m68knommu families). Each can handle the hardware
setup differences, and there is a few at this level.

arch/m68knommu/platform/5307/ints.c

+/*
+ * linux/arch/m68knommu/kernel/ints.c -- General interrupt handling code
+ *
+ * Copyright (C) 1999-2002  Greg Ungerer (gerg@snapgear.com)
+ * Copyright (C) 1998  D. Jeff Dionne <jeff@lineo.ca>,
+ *                     Kenneth Albanowski <kjahds@kjahds.com>,
+ * Copyright (C) 2000  Lineo Inc. (www.lineo.com) 
+ *
+ * Based on:
+ *
+ * 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.
+ */
+
+#include <linux/types.h>
+#include <linux/init.h>
+#include <linux/sched.h>
+#include <linux/kernel_stat.h>
+#include <linux/errno.h>
+#include <linux/config.h>
+#include <linux/seq_file.h>
+
+#include <asm/system.h>
+#include <asm/irq.h>
+#include <asm/traps.h>
+#include <asm/page.h>
+#include <asm/machdep.h>
+
+/*
+ *	This table stores the address info for each vector handler.
+ */
+irq_handler_t irq_list[SYS_IRQS];
+
+#define NUM_IRQ_NODES 16
+static irq_node_t nodes[NUM_IRQ_NODES];
+
+/* The number of spurious interrupts */
+volatile unsigned int num_spurious;
+
+unsigned int local_bh_count[NR_CPUS];
+unsigned int local_irq_count[NR_CPUS];
+
+static void default_irq_handler(int irq, void *ptr, struct pt_regs *regs)
+{
+#if 1
+	printk("%s(%d): default irq handler vec=%d [0x%x]\n",
+		__FILE__, __LINE__, irq, irq);
+#endif
+}
+
+/*
+ * 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];
+		else
+			irq_list[i].handler = default_irq_handler;
+		irq_list[i].flags   = IRQ_FLG_STD;
+		irq_list[i].dev_id  = NULL;
+		irq_list[i].devname = NULL;
+	}
+
+	for (i = 0; i < NUM_IRQ_NODES; i++)
+		nodes[i].handler = NULL;
+
+	if (mach_init_IRQ)
+		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 request_irq(unsigned int irq, void (*handler)(int, void *, struct pt_regs *),
+                unsigned long flags, const char *devname, void *dev_id)
+{
+	if (irq < 0 || irq >= NR_IRQS) {
+		printk("%s: Incorrect IRQ %d from %s\n", __FUNCTION__,
+			irq, devname);
+		return -ENXIO;
+	}
+
+	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;
+		}
+	}
+
+	if (flags & IRQ_FLG_FAST) {
+		extern asmlinkage void fasthandler(void);
+		extern void set_evector(int vecnum, void (*handler)(void));
+		set_evector(irq, fasthandler);
+	}
+
+	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 free_irq(unsigned int irq, void *dev_id)
+{
+	if (irq >= NR_IRQS) {
+		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);
+
+	if (irq_list[irq].flags & IRQ_FLG_FAST) {
+		extern asmlinkage void inthandler(void);
+		extern void set_evector(int vecnum, void (*handler)(void));
+		set_evector(irq, inthandler);
+	}
+
+	if (mach_default_handler)
+		irq_list[irq].handler = (*mach_default_handler)[irq];
+	else
+		irq_list[irq].handler = default_irq_handler;
+	irq_list[irq].flags   = IRQ_FLG_STD;
+	irq_list[irq].dev_id  = NULL;
+	irq_list[irq].devname = 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 > 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 > 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 = NULL;
+}
+
+/*
+ * Do we need these probe functions on the m68k?
+ *
+ *  ... may be useful with ISA devices
+ */
+unsigned long probe_irq_on (void)
+{
+	return 0;
+}
+
+int probe_irq_off (unsigned long irqs)
+{
+	return 0;
+}
+
+asmlinkage void process_int(unsigned long vec, struct pt_regs *fp)
+{
+	if (vec >= VEC_INT1 && vec <= VEC_INT7) {
+		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;
+
+	for (i = 0; i < NR_IRQS; i++) {
+		if (irq_list[i].flags & IRQ_FLG_STD)
+			continue;
+
+		seq_printf(p, "%3d: %10u ", i,
+			(i ? kstat_cpu(0).irqs[i] : num_spurious));
+		if (irq_list[i].flags & IRQ_FLG_LOCK)
+			seq_printf(p, "L ");
+		else
+			seq_printf(p, "  ");
+		seq_printf(p, "%s\n", irq_list[i].devname);
+	}
+
+	if (mach_get_irq_list)
+		mach_get_irq_list(p, v);
+	return(0);
+}
+
+void init_irq_proc(void)
+{
+	/* Insert /proc/irq driver here */
+}
+