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Diffstat (limited to 'arch/m68k/sun3/sun3ints.c')
-rw-r--r--arch/m68k/sun3/sun3ints.c265
1 files changed, 265 insertions, 0 deletions
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);
+ }
+}