From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001
From: Linus Torvalds <torvalds@ppc970.osdl.org>
Date: Sat, 16 Apr 2005 15:20:36 -0700
Subject: Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
---
 arch/m68k/sun3/sun3ints.c | 265 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 265 insertions(+)
 create mode 100644 arch/m68k/sun3/sun3ints.c

(limited to 'arch/m68k/sun3/sun3ints.c')

diff --git a/arch/m68k/sun3/sun3ints.c b/arch/m68k/sun3/sun3ints.c
new file mode 100644
index 00000000000..e62a033cd49
--- /dev/null
+++ b/arch/m68k/sun3/sun3ints.c
@@ -0,0 +1,265 @@
+ /*
+ * linux/arch/m68k/sun3/sun3ints.c -- Sun-3(x) 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>
+#include <linux/seq_file.h>
+
+extern void sun3_leds (unsigned char);
+static irqreturn_t sun3_inthandle(int irq, void *dev_id, struct pt_regs *fp);
+
+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)
+};
+
+volatile unsigned char* sun3_intreg;
+
+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_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_cpu(0).irqs[SYS_IRQS + irq]++;
+	*sun3_intreg &= ~(1<<irq);
+	*sun3_intreg |=  (1<<irq);
+}
+
+static irqreturn_t sun3_int7(int irq, void *dev_id, struct pt_regs *fp)
+{
+	sun3_do_irq(irq,fp);
+	if(!(kstat_cpu(0).irqs[SYS_IRQS + irq] % 2000))
+		sun3_leds(led_pattern[(kstat_cpu(0).irqs[SYS_IRQS+irq]%16000)
+			  /2000]);
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t sun3_int5(int irq, void *dev_id, struct pt_regs *fp)
+{
+        kstat_cpu(0).irqs[SYS_IRQS + irq]++;
+#ifdef CONFIG_SUN3
+	intersil_clear();
+#endif
+        *sun3_intreg &= ~(1<<irq);
+        *sun3_intreg |=  (1<<irq);
+#ifdef CONFIG_SUN3
+	intersil_clear();
+#endif
+        do_timer(fp);
+#ifndef CONFIG_SMP
+	update_process_times(user_mode(fp));
+#endif
+        if(!(kstat_cpu(0).irqs[SYS_IRQS + irq] % 20))
+                sun3_leds(led_pattern[(kstat_cpu(0).irqs[SYS_IRQS+irq]%160)
+                /20]);
+	return IRQ_HANDLED;
+}
+
+/* handle requested ints, excepting 5 and 7, which always do the same
+   thing */
+irqreturn_t (*sun3_default_handler[SYS_IRQS])(int, void *, struct pt_regs *) = {
+	[0] = sun3_inthandle,
+	[1] = sun3_inthandle,
+	[2] = sun3_inthandle,
+	[3] = sun3_inthandle,
+	[4] = sun3_inthandle,
+	[5] = sun3_int5,
+	[6] = sun3_inthandle,
+	[7] = sun3_int7
+};
+
+static const char *dev_names[SYS_IRQS] = {
+	[5] = "timer",
+	[7] = "int7 handler"
+};
+static void *dev_ids[SYS_IRQS];
+static irqreturn_t (*sun3_inthandler[SYS_IRQS])(int, void *, struct pt_regs *) = {
+	[5] = sun3_int5,
+	[7] = sun3_int7
+};
+static irqreturn_t (*sun3_vechandler[SUN3_INT_VECS])(int, void *, struct pt_regs *);
+static void *vec_ids[SUN3_INT_VECS];
+static const char *vec_names[SUN3_INT_VECS];
+static int vec_ints[SUN3_INT_VECS];
+
+
+int show_sun3_interrupts(struct seq_file *p, void *v)
+{
+	int i;
+
+	for(i = 0; i < (SUN3_INT_VECS-1); i++) {
+		if(sun3_vechandler[i] != NULL) {
+			seq_printf(p, "vec %3d: %10u %s\n", i+64,
+				   vec_ints[i],
+				   (vec_names[i]) ? vec_names[i] :
+				   "sun3_vechandler");
+		}
+	}
+
+	return 0;
+}
+
+static irqreturn_t sun3_inthandle(int irq, void *dev_id, struct pt_regs *fp)
+{
+	if(sun3_inthandler[irq] == NULL)
+		panic ("bad interrupt %d received (id %p)\n",irq, dev_id);
+
+        kstat_cpu(0).irqs[SYS_IRQS + irq]++;
+        *sun3_intreg &= ~(1<<irq);
+
+	sun3_inthandler[irq](irq, dev_ids[irq], fp);
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t sun3_vec255(int irq, void *dev_id, struct pt_regs *fp)
+{
+//	intersil_clear();
+	return IRQ_HANDLED;
+}
+
+void sun3_init_IRQ(void)
+{
+	int i;
+
+	*sun3_intreg = 1;
+
+	for(i = 0; i < SYS_IRQS; i++)
+	{
+		if(dev_names[i])
+			cpu_request_irq(i, sun3_default_handler[i], 0,
+					dev_names[i], NULL);
+	}
+
+	for(i = 0; i < 192; i++)
+		sun3_vechandler[i] = NULL;
+
+	sun3_vechandler[191] = sun3_vec255;
+}
+
+int sun3_request_irq(unsigned int irq, irqreturn_t (*handler)(int, void *, struct pt_regs *),
+                      unsigned long flags, const char *devname, void *dev_id)
+{
+
+	if(irq < SYS_IRQS) {
+		if(sun3_inthandler[irq] != NULL) {
+			printk("sun3_request_irq: request for irq %d -- already taken!\n", irq);
+			return 1;
+		}
+
+		sun3_inthandler[irq] = handler;
+		dev_ids[irq] = dev_id;
+		dev_names[irq] = devname;
+
+		/* setting devname would be nice */
+		cpu_request_irq(irq, sun3_default_handler[irq], 0, devname,
+				NULL);
+
+		return 0;
+	} else {
+		if((irq >= 64) && (irq <= 255)) {
+		        int vec;
+
+			vec = irq - 64;
+			if(sun3_vechandler[vec] != NULL) {
+				printk("sun3_request_irq: request for vec %d -- already taken!\n", irq);
+				return 1;
+			}
+
+			sun3_vechandler[vec] = handler;
+			vec_ids[vec] = dev_id;
+			vec_names[vec] = devname;
+			vec_ints[vec] = 0;
+
+			return 0;
+		}
+	}
+
+	printk("sun3_request_irq: invalid irq %d\n", irq);
+	return 1;
+
+}
+
+void sun3_free_irq(unsigned int irq, void *dev_id)
+{
+
+	if(irq < SYS_IRQS) {
+		if(sun3_inthandler[irq] == NULL)
+			panic("sun3_free_int: attempt to free unused irq %d\n", irq);
+		if(dev_ids[irq] != dev_id)
+			panic("sun3_free_int: incorrect dev_id for irq %d\n", irq);
+
+		sun3_inthandler[irq] = NULL;
+		return;
+	} else if((irq >= 64) && (irq <= 255)) {
+		int vec;
+
+		vec = irq - 64;
+		if(sun3_vechandler[vec] == NULL)
+			panic("sun3_free_int: attempt to free unused vector %d\n", irq);
+		if(vec_ids[irq] != dev_id)
+			panic("sun3_free_int: incorrect dev_id for vec %d\n", irq);
+
+		sun3_vechandler[vec] = NULL;
+		return;
+	} else {
+		panic("sun3_free_irq: invalid irq %d\n", irq);
+	}
+}
+
+irqreturn_t sun3_process_int(int irq, struct pt_regs *regs)
+{
+
+	if((irq >= 64) && (irq <= 255)) {
+		int vec;
+
+		vec = irq - 64;
+		if(sun3_vechandler[vec] == NULL)
+			panic ("bad interrupt vector %d received\n",irq);
+
+		vec_ints[vec]++;
+		return sun3_vechandler[vec](irq, vec_ids[vec], regs);
+	} else {
+		panic("sun3_process_int: unable to handle interrupt vector %d\n",
+		      irq);
+	}
+}
-- 
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