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>
19 extern void sun3_leds (unsigned char);
20 static void sun3_inthandle(int irq, void *dev_id, struct pt_regs *fp);
22 void sun3_disable_interrupts(void)
27 void sun3_enable_interrupts(void)
32 int led_pattern[8] = {
39 volatile unsigned char* sun3_intreg;
41 void sun3_insert_irq(irq_node_t **list, irq_node_t *node)
45 void sun3_delete_irq(irq_node_t **list, void *dev_id)
49 void sun3_enable_irq(unsigned int irq)
51 *sun3_intreg |= (1<<irq);
54 void sun3_disable_irq(unsigned int irq)
56 *sun3_intreg &= ~(1<<irq);
59 inline void sun3_do_irq(int irq, struct pt_regs *fp)
61 kstat.irqs[0][SYS_IRQS + irq]++;
62 *sun3_intreg &= ~(1<<irq);
63 *sun3_intreg |= (1<<irq);
66 static void sun3_int7(int irq, void *dev_id, struct pt_regs *fp)
69 if(!(kstat.irqs[0][SYS_IRQS + irq] % 2000))
70 sun3_leds(led_pattern[(kstat.irqs[0][SYS_IRQS+irq]%16000)/2000]);
73 static void sun3_int5(int irq, void *dev_id, struct pt_regs *fp)
75 kstat.irqs[0][SYS_IRQS + irq]++;
79 *sun3_intreg &= ~(1<<irq);
80 *sun3_intreg |= (1<<irq);
85 if(!(kstat.irqs[0][SYS_IRQS + irq] % 20))
86 sun3_leds(led_pattern[(kstat.irqs[0][SYS_IRQS+irq]%160)
90 /* handle requested ints, excepting 5 and 7, which always do the same
92 void (*sun3_default_handler[SYS_IRQS])(int, void *, struct pt_regs *) = {
93 sun3_inthandle, sun3_inthandle, sun3_inthandle, sun3_inthandle,
94 sun3_inthandle, sun3_int5, sun3_inthandle, sun3_int7
97 static const char *dev_names[SYS_IRQS] = { NULL, NULL, NULL, NULL,
98 NULL, "timer", NULL, "int7 handler" };
99 static void *dev_ids[SYS_IRQS];
100 static void (*sun3_inthandler[SYS_IRQS])(int, void *, struct pt_regs *) = {
101 NULL, NULL, NULL, NULL, NULL, sun3_int5, NULL, sun3_int7
104 static void (*sun3_vechandler[SUN3_INT_VECS])(int, void *, struct pt_regs *);
105 static void *vec_ids[SUN3_INT_VECS];
106 static const char *vec_names[SUN3_INT_VECS];
107 static int vec_ints[SUN3_INT_VECS];
110 int sun3_get_irq_list(char *buf)
114 for(i = 0; i < (SUN3_INT_VECS-1); i++) {
115 if(sun3_vechandler[i] != NULL) {
116 len += sprintf(buf+len, "vec %3d: %10u %s\n", i+64,
118 (vec_names[i]) ? vec_names[i] :
126 static void sun3_inthandle(int irq, void *dev_id, struct pt_regs *fp)
128 if(sun3_inthandler[irq] == NULL)
129 panic ("bad interrupt %d received (id %p)\n",irq, dev_id);
131 kstat.irqs[0][SYS_IRQS + irq]++;
132 *sun3_intreg &= ~(1<<irq);
134 sun3_inthandler[irq](irq, dev_ids[irq], fp);
137 static void sun3_vec255(int irq, void *dev_id, struct pt_regs *fp)
142 void sun3_init_IRQ(void)
148 for(i = 0; i < SYS_IRQS; i++)
151 sys_request_irq(i, sun3_default_handler[i],
152 0, dev_names[i], NULL);
155 for(i = 0; i < 192; i++)
156 sun3_vechandler[i] = NULL;
158 sun3_vechandler[191] = sun3_vec255;
161 int sun3_request_irq(unsigned int irq, void (*handler)(int, void *, struct pt_regs *),
162 unsigned long flags, const char *devname, void *dev_id)
166 if(sun3_inthandler[irq] != NULL) {
167 printk("sun3_request_irq: request for irq %d -- already taken!\n", irq);
171 sun3_inthandler[irq] = handler;
172 dev_ids[irq] = dev_id;
173 dev_names[irq] = devname;
175 /* setting devname would be nice */
176 sys_request_irq(irq, sun3_default_handler[irq], 0, devname, NULL);
180 if((irq >= 64) && (irq <= 255)) {
184 if(sun3_vechandler[vec] != NULL) {
185 printk("sun3_request_irq: request for vec %d -- already taken!\n", irq);
189 sun3_vechandler[vec] = handler;
190 vec_ids[vec] = dev_id;
191 vec_names[vec] = devname;
198 printk("sun3_request_irq: invalid irq %d\n", irq);
203 void sun3_free_irq(unsigned int irq, void *dev_id)
207 if(sun3_inthandler[irq] == NULL)
208 panic("sun3_free_int: attempt to free unused irq %d\n", irq);
209 if(dev_ids[irq] != dev_id)
210 panic("sun3_free_int: incorrect dev_id for irq %d\n", irq);
212 sun3_inthandler[irq] = NULL;
214 } else if((irq >= 64) && (irq <= 255)) {
218 if(sun3_vechandler[vec] == NULL)
219 panic("sun3_free_int: attempt to free unused vector %d\n", irq);
220 if(vec_ids[irq] != dev_id)
221 panic("sun3_free_int: incorrect dev_id for vec %d\n", irq);
223 sun3_vechandler[vec] = NULL;
226 panic("sun3_free_irq: invalid irq %d\n", irq);
230 void sun3_process_int(int irq, struct pt_regs *regs)
233 if((irq >= 64) && (irq <= 255)) {
237 if(sun3_vechandler[vec] == NULL)
238 panic ("bad interrupt vector %d received\n",irq);
241 sun3_vechandler[vec](irq, vec_ids[vec], regs);
244 panic("sun3_process_int: unable to handle interrupt vector %d\n",