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-rw-r--r--arch/m68knommu/platform/5307/ints.c280
1 files changed, 280 insertions, 0 deletions
diff --git a/arch/m68knommu/platform/5307/ints.c b/arch/m68knommu/platform/5307/ints.c
new file mode 100644
index 000000000000..0117754d44f3
--- /dev/null
+++ b/arch/m68knommu/platform/5307/ints.c
@@ -0,0 +1,280 @@
+/*
+ * 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/module.h>
+#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 irqreturn_t default_irq_handler(int irq, void *ptr, struct pt_regs *regs)
+{
+#if 1
+ printk(KERN_INFO "%s(%d): default irq handler vec=%d [0x%x]\n",
+ __FILE__, __LINE__, irq, irq);
+#endif
+ return(IRQ_HANDLED);
+}
+
+/*
+ * 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(KERN_INFO "new_irq_node: out of nodes\n");
+ return NULL;
+}
+
+int request_irq(
+ unsigned int irq,
+ irqreturn_t (*handler)(int, void *, struct pt_regs *),
+ unsigned long flags,
+ const char *devname,
+ void *dev_id)
+{
+ if (irq < 0 || irq >= NR_IRQS) {
+ printk(KERN_WARNING "%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(KERN_WARNING "%s: IRQ %d from %s is not replaceable\n",
+ __FUNCTION__, irq, irq_list[irq].devname);
+ return -EBUSY;
+ }
+ if (flags & IRQ_FLG_REPLACE) {
+ printk(KERN_WARNING "%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;
+}
+
+EXPORT_SYMBOL(request_irq);
+
+void free_irq(unsigned int irq, void *dev_id)
+{
+ if (irq >= NR_IRQS) {
+ printk(KERN_WARNING "%s: Incorrect IRQ %d\n", __FUNCTION__, irq);
+ return;
+ }
+
+ if (irq_list[irq].dev_id != dev_id)
+ printk(KERN_WARNING "%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;
+}
+
+EXPORT_SYMBOL(free_irq);
+
+
+int sys_request_irq(unsigned int irq,
+ irqreturn_t (*handler)(int, void *, struct pt_regs *),
+ unsigned long flags, const char *devname, void *dev_id)
+{
+ if (irq > IRQ7) {
+ printk(KERN_WARNING "%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(KERN_WARNING "%s: IRQ %d from %s is not replaceable\n",
+ __FUNCTION__, irq, irq_list[irq].devname);
+ return -EBUSY;
+ }
+ if (!(flags & IRQ_FLG_REPLACE)) {
+ printk(KERN_WARNING "%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(KERN_WARNING "%s: Incorrect IRQ %d\n", __FUNCTION__, irq);
+ return;
+ }
+
+ if (irq_list[irq].dev_id != dev_id)
+ printk(KERN_WARNING "%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;
+}
+
+EXPORT_SYMBOL(probe_irq_on);
+
+int probe_irq_off (unsigned long irqs)
+{
+ return 0;
+}
+
+EXPORT_SYMBOL(probe_irq_off);
+
+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 = *(loff_t *) v;
+
+ if (i < NR_IRQS) {
+ if (! (irq_list[i].flags & IRQ_FLG_STD)) {
+ 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 (i == NR_IRQS && mach_get_irq_list)
+ mach_get_irq_list(p, v);
+ return 0;
+}
+
+void init_irq_proc(void)
+{
+ /* Insert /proc/irq driver here */
+}
+
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