1*4882a593Smuzhiyun /*
2*4882a593Smuzhiyun * linux/arch/m68k/sun3/sun3ints.c -- Sun-3(x) Linux interrupt handling code
3*4882a593Smuzhiyun *
4*4882a593Smuzhiyun * This file is subject to the terms and conditions of the GNU General Public
5*4882a593Smuzhiyun * License. See the file COPYING in the main directory of this archive
6*4882a593Smuzhiyun * for more details.
7*4882a593Smuzhiyun */
8*4882a593Smuzhiyun
9*4882a593Smuzhiyun #include <linux/types.h>
10*4882a593Smuzhiyun #include <linux/kernel.h>
11*4882a593Smuzhiyun #include <linux/sched.h>
12*4882a593Smuzhiyun #include <linux/kernel_stat.h>
13*4882a593Smuzhiyun #include <linux/interrupt.h>
14*4882a593Smuzhiyun #include <asm/segment.h>
15*4882a593Smuzhiyun #include <asm/intersil.h>
16*4882a593Smuzhiyun #include <asm/oplib.h>
17*4882a593Smuzhiyun #include <asm/sun3ints.h>
18*4882a593Smuzhiyun #include <asm/irq_regs.h>
19*4882a593Smuzhiyun #include <linux/seq_file.h>
20*4882a593Smuzhiyun
21*4882a593Smuzhiyun extern void sun3_leds (unsigned char);
22*4882a593Smuzhiyun
sun3_disable_interrupts(void)23*4882a593Smuzhiyun void sun3_disable_interrupts(void)
24*4882a593Smuzhiyun {
25*4882a593Smuzhiyun sun3_disable_irq(0);
26*4882a593Smuzhiyun }
27*4882a593Smuzhiyun
sun3_enable_interrupts(void)28*4882a593Smuzhiyun void sun3_enable_interrupts(void)
29*4882a593Smuzhiyun {
30*4882a593Smuzhiyun sun3_enable_irq(0);
31*4882a593Smuzhiyun }
32*4882a593Smuzhiyun
33*4882a593Smuzhiyun static int led_pattern[8] = {
34*4882a593Smuzhiyun ~(0x80), ~(0x01),
35*4882a593Smuzhiyun ~(0x40), ~(0x02),
36*4882a593Smuzhiyun ~(0x20), ~(0x04),
37*4882a593Smuzhiyun ~(0x10), ~(0x08)
38*4882a593Smuzhiyun };
39*4882a593Smuzhiyun
40*4882a593Smuzhiyun volatile unsigned char* sun3_intreg;
41*4882a593Smuzhiyun
sun3_enable_irq(unsigned int irq)42*4882a593Smuzhiyun void sun3_enable_irq(unsigned int irq)
43*4882a593Smuzhiyun {
44*4882a593Smuzhiyun *sun3_intreg |= (1 << irq);
45*4882a593Smuzhiyun }
46*4882a593Smuzhiyun
sun3_disable_irq(unsigned int irq)47*4882a593Smuzhiyun void sun3_disable_irq(unsigned int irq)
48*4882a593Smuzhiyun {
49*4882a593Smuzhiyun *sun3_intreg &= ~(1 << irq);
50*4882a593Smuzhiyun }
51*4882a593Smuzhiyun
sun3_int7(int irq,void * dev_id)52*4882a593Smuzhiyun static irqreturn_t sun3_int7(int irq, void *dev_id)
53*4882a593Smuzhiyun {
54*4882a593Smuzhiyun unsigned int cnt;
55*4882a593Smuzhiyun
56*4882a593Smuzhiyun cnt = kstat_irqs_cpu(irq, 0);
57*4882a593Smuzhiyun if (!(cnt % 2000))
58*4882a593Smuzhiyun sun3_leds(led_pattern[cnt % 16000 / 2000]);
59*4882a593Smuzhiyun return IRQ_HANDLED;
60*4882a593Smuzhiyun }
61*4882a593Smuzhiyun
sun3_int5(int irq,void * dev_id)62*4882a593Smuzhiyun static irqreturn_t sun3_int5(int irq, void *dev_id)
63*4882a593Smuzhiyun {
64*4882a593Smuzhiyun unsigned long flags;
65*4882a593Smuzhiyun unsigned int cnt;
66*4882a593Smuzhiyun
67*4882a593Smuzhiyun local_irq_save(flags);
68*4882a593Smuzhiyun #ifdef CONFIG_SUN3
69*4882a593Smuzhiyun intersil_clear();
70*4882a593Smuzhiyun #endif
71*4882a593Smuzhiyun sun3_disable_irq(5);
72*4882a593Smuzhiyun sun3_enable_irq(5);
73*4882a593Smuzhiyun #ifdef CONFIG_SUN3
74*4882a593Smuzhiyun intersil_clear();
75*4882a593Smuzhiyun #endif
76*4882a593Smuzhiyun xtime_update(1);
77*4882a593Smuzhiyun update_process_times(user_mode(get_irq_regs()));
78*4882a593Smuzhiyun cnt = kstat_irqs_cpu(irq, 0);
79*4882a593Smuzhiyun if (!(cnt % 20))
80*4882a593Smuzhiyun sun3_leds(led_pattern[cnt % 160 / 20]);
81*4882a593Smuzhiyun local_irq_restore(flags);
82*4882a593Smuzhiyun return IRQ_HANDLED;
83*4882a593Smuzhiyun }
84*4882a593Smuzhiyun
sun3_vec255(int irq,void * dev_id)85*4882a593Smuzhiyun static irqreturn_t sun3_vec255(int irq, void *dev_id)
86*4882a593Smuzhiyun {
87*4882a593Smuzhiyun return IRQ_HANDLED;
88*4882a593Smuzhiyun }
89*4882a593Smuzhiyun
sun3_init_IRQ(void)90*4882a593Smuzhiyun void __init sun3_init_IRQ(void)
91*4882a593Smuzhiyun {
92*4882a593Smuzhiyun *sun3_intreg = 1;
93*4882a593Smuzhiyun
94*4882a593Smuzhiyun m68k_setup_user_interrupt(VEC_USER, 128);
95*4882a593Smuzhiyun
96*4882a593Smuzhiyun if (request_irq(IRQ_AUTO_5, sun3_int5, 0, "clock", NULL))
97*4882a593Smuzhiyun pr_err("Couldn't register %s interrupt\n", "int5");
98*4882a593Smuzhiyun if (request_irq(IRQ_AUTO_7, sun3_int7, 0, "nmi", NULL))
99*4882a593Smuzhiyun pr_err("Couldn't register %s interrupt\n", "int7");
100*4882a593Smuzhiyun if (request_irq(IRQ_USER+127, sun3_vec255, 0, "vec255", NULL))
101*4882a593Smuzhiyun pr_err("Couldn't register %s interrupt\n", "vec255");
102*4882a593Smuzhiyun }
103