2 * linux/arch/m68k/sun3/sun3ints.c -- Sun-3(x) Linux interrupt handling code
4 * This file is subject to the terms and conditions of the GNU General Public
5 * License. See the file COPYING in the main directory of this archive
9 #include <linux/types.h>
10 #include <linux/kernel.h>
11 #include <linux/sched.h>
12 #include <linux/kernel_stat.h>
13 #include <linux/interrupt.h>
14 #include <asm/segment.h>
15 #include <asm/intersil.h>
16 #include <asm/oplib.h>
17 #include <asm/sun3ints.h>
18 #include <linux/seq_file.h>
20 extern void sun3_leds (unsigned char);
21 static irqreturn_t sun3_inthandle(int irq, void *dev_id, struct pt_regs *fp);
23 void sun3_disable_interrupts(void)
28 void sun3_enable_interrupts(void)
33 int led_pattern[8] = {
40 volatile unsigned char* sun3_intreg;
42 void sun3_insert_irq(irq_node_t **list, irq_node_t *node)
46 void sun3_delete_irq(irq_node_t **list, void *dev_id)
50 void sun3_enable_irq(unsigned int irq)
52 *sun3_intreg |= (1<<irq);
55 void sun3_disable_irq(unsigned int irq)
57 *sun3_intreg &= ~(1<<irq);
60 inline void sun3_do_irq(int irq, struct pt_regs *fp)
62 kstat_cpu(0).irqs[SYS_IRQS + irq]++;
63 *sun3_intreg &= ~(1<<irq);
64 *sun3_intreg |= (1<<irq);
67 static irqreturn_t sun3_int7(int irq, void *dev_id, struct pt_regs *fp)
70 if(!(kstat_cpu(0).irqs[SYS_IRQS + irq] % 2000))
71 sun3_leds(led_pattern[(kstat_cpu(0).irqs[SYS_IRQS+irq]%16000)
76 static irqreturn_t sun3_int5(int irq, void *dev_id, struct pt_regs *fp)
78 kstat_cpu(0).irqs[SYS_IRQS + irq]++;
82 *sun3_intreg &= ~(1<<irq);
83 *sun3_intreg |= (1<<irq);
88 if(!(kstat_cpu(0).irqs[SYS_IRQS + irq] % 20))
89 sun3_leds(led_pattern[(kstat_cpu(0).irqs[SYS_IRQS+irq]%160)
94 /* handle requested ints, excepting 5 and 7, which always do the same
96 irqreturn_t (*sun3_default_handler[SYS_IRQS])(int, void *, struct pt_regs *) = {
100 [3] = sun3_inthandle,
101 [4] = sun3_inthandle,
103 [6] = sun3_inthandle,
107 static const char *dev_names[SYS_IRQS] = {
111 static void *dev_ids[SYS_IRQS];
112 static irqreturn_t (*sun3_inthandler[SYS_IRQS])(int, void *, struct pt_regs *) = {
116 static irqreturn_t (*sun3_vechandler[SUN3_INT_VECS])(int, void *, struct pt_regs *);
117 static void *vec_ids[SUN3_INT_VECS];
118 static const char *vec_names[SUN3_INT_VECS];
119 static int vec_ints[SUN3_INT_VECS];
122 int show_sun3_interrupts(struct seq_file *p, void *v)
126 for(i = 0; i < (SUN3_INT_VECS-1); i++) {
127 if(sun3_vechandler[i] != NULL) {
128 seq_printf(p, "vec %3d: %10u %s\n", i+64,
130 (vec_names[i]) ? vec_names[i] :
138 static irqreturn_t sun3_inthandle(int irq, void *dev_id, struct pt_regs *fp)
140 if(sun3_inthandler[irq] == NULL)
141 panic ("bad interrupt %d received (id %p)\n",irq, dev_id);
143 kstat_cpu(0).irqs[SYS_IRQS + irq]++;
144 *sun3_intreg &= ~(1<<irq);
146 sun3_inthandler[irq](irq, dev_ids[irq], fp);
150 static irqreturn_t sun3_vec255(int irq, void *dev_id, struct pt_regs *fp)
156 void sun3_init_IRQ(void)
162 for(i = 0; i < SYS_IRQS; i++)
165 cpu_request_irq(i, sun3_default_handler[i], 0,
169 for(i = 0; i < 192; i++)
170 sun3_vechandler[i] = NULL;
172 sun3_vechandler[191] = sun3_vec255;
175 int sun3_request_irq(unsigned int irq, irqreturn_t (*handler)(int, void *, struct pt_regs *),
176 unsigned long flags, const char *devname, void *dev_id)
180 if(sun3_inthandler[irq] != NULL) {
181 printk("sun3_request_irq: request for irq %d -- already taken!\n", irq);
185 sun3_inthandler[irq] = handler;
186 dev_ids[irq] = dev_id;
187 dev_names[irq] = devname;
189 /* setting devname would be nice */
190 cpu_request_irq(irq, sun3_default_handler[irq], 0, devname,
195 if((irq >= 64) && (irq <= 255)) {
199 if(sun3_vechandler[vec] != NULL) {
200 printk("sun3_request_irq: request for vec %d -- already taken!\n", irq);
204 sun3_vechandler[vec] = handler;
205 vec_ids[vec] = dev_id;
206 vec_names[vec] = devname;
213 printk("sun3_request_irq: invalid irq %d\n", irq);
218 void sun3_free_irq(unsigned int irq, void *dev_id)
222 if(sun3_inthandler[irq] == NULL)
223 panic("sun3_free_int: attempt to free unused irq %d\n", irq);
224 if(dev_ids[irq] != dev_id)
225 panic("sun3_free_int: incorrect dev_id for irq %d\n", irq);
227 sun3_inthandler[irq] = NULL;
229 } else if((irq >= 64) && (irq <= 255)) {
233 if(sun3_vechandler[vec] == NULL)
234 panic("sun3_free_int: attempt to free unused vector %d\n", irq);
235 if(vec_ids[irq] != dev_id)
236 panic("sun3_free_int: incorrect dev_id for vec %d\n", irq);
238 sun3_vechandler[vec] = NULL;
241 panic("sun3_free_irq: invalid irq %d\n", irq);
245 irqreturn_t sun3_process_int(int irq, struct pt_regs *regs)
248 if((irq >= 64) && (irq <= 255)) {
252 if(sun3_vechandler[vec] == NULL)
253 panic ("bad interrupt vector %d received\n",irq);
256 return sun3_vechandler[vec](irq, vec_ids[vec], regs);
258 panic("sun3_process_int: unable to handle interrupt vector %d\n",