patch-2.3.17 linux/arch/m68k/sun3/sun3ints.c

• Lines: 133
• Date: Sat Sep 4 13:06:41 1999
• Orig file: v2.3.16/linux/arch/m68k/sun3/sun3ints.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.16/linux/arch/m68k/sun3/sun3ints.c linux/arch/m68k/sun3/sun3ints.c
@@ -0,0 +1,132 @@
+ /*
+ * linux/arch/m68k/sun3/sun3ints.c -- Sun-3 Linux 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/config.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/kernel_stat.h>
+#include <linux/interrupt.h>
+#include <asm/segment.h>
+#include <asm/intersil.h>
+#include <asm/oplib.h>
+#include <asm/sun3ints.h>
+
+extern void sun3_leds (unsigned char);
+
+void sun3_disable_interrupts(void)
+{
+	sun3_disable_irq(0);
+}
+
+void sun3_enable_interrupts(void)
+{
+	sun3_enable_irq(0);
+}	
+
+int led_pattern[8] = {
+       ~(0x80), ~(0x01),
+       ~(0x40), ~(0x02),
+       ~(0x20), ~(0x04),
+       ~(0x10), ~(0x08)
+};
+
+unsigned char* sun3_intreg;
+
+void sun3_init_IRQ(void)
+{
+}
+                                
+void sun3_insert_irq(irq_node_t **list, irq_node_t *node)
+{
+}
+
+void sun3_delete_irq(irq_node_t **list, void *dev_id)
+{
+}
+
+void sun3_free_irq(unsigned int irq, void *dev_id)
+{
+}
+
+void sun3_enable_irq(unsigned int irq)
+{
+	*sun3_intreg |=  (1<<irq);
+}
+
+void sun3_disable_irq(unsigned int irq)
+{
+	*sun3_intreg &= ~(1<<irq);
+}
+
+inline void sun3_do_irq(int irq, struct pt_regs *fp)
+{
+	kstat.irqs[0][SYS_IRQS + irq]++;
+	*sun3_intreg &= ~(1<<irq);
+	*sun3_intreg |=  (1<<irq);
+}
+
+int sun3_get_irq_list(char *buf)
+{
+	return 0;
+}
+
+static void sun3_int5(int irq, void *dev_id, struct pt_regs *fp)
+{
+        kstat.irqs[0][SYS_IRQS + irq]++;
+        *sun3_intreg &= ~(1<<irq);
+	intersil_clear();
+        *sun3_intreg |=  (1<<irq);
+        do_timer(fp);
+        if(!(kstat.irqs[0][SYS_IRQS + irq] % 20))
+                sun3_leds(led_pattern[(kstat.irqs[0][SYS_IRQS+irq]%160)
+                /20]);
+}
+
+static void sun3_int7(int irq, void *dev_id, struct pt_regs *fp)
+{
+	sun3_do_irq(irq,fp);
+	if(!(kstat.irqs[0][SYS_IRQS + irq] % 2000)) 
+		sun3_leds(led_pattern[(kstat.irqs[0][SYS_IRQS+irq]%16000)/2000]);
+}
+
+/* handle requested ints, excepting 5 and 7, which always do the same
+   thing */
+static void *dev_ids[SYS_IRQS];
+static void (*inthandler[SYS_IRQS])(int, void *, struct pt_regs *) = {
+	NULL, NULL, NULL, NULL, NULL, sun3_int5, NULL, sun3_int7
+};
+
+static void sun3_inthandle(int irq, void *dev_id, struct pt_regs *fp)
+{
+	if(inthandler[irq] == NULL)
+		panic ("bad interrupt %d received (id %p)\n",irq, dev_id);
+
+        kstat.irqs[0][SYS_IRQS + irq]++;
+        *sun3_intreg &= ~(1<<irq);
+
+	inthandler[irq](irq, dev_ids[irq], fp);
+}
+
+void (*sun3_default_handler[SYS_IRQS])(int, void *, struct pt_regs *) = {
+	sun3_inthandle, sun3_inthandle, sun3_inthandle, sun3_inthandle,
+	sun3_inthandle, sun3_int5, sun3_inthandle, sun3_int7
+};
+
+int sun3_request_irq(unsigned int irq, void (*handler)(int, void *, struct pt_regs *),
+                      unsigned long flags, const char *devname, void *dev_id)
+{
+	if(inthandler[irq] != NULL)
+		return -1;
+
+	inthandler[irq] = handler;
+	dev_ids[irq] = dev_id;
+
+	return 0;
+}
+