1 /*
2 * linux/arch/m68k/sun3/sun3ints.c -- Sun-3(x) Linux interrupt handling code
3 *
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
6 * for more details.
7 */
8
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 <asm/irq_regs.h>
19 #include <linux/seq_file.h>
20
21 extern void sun3_leds (unsigned char);
22
sun3_disable_interrupts(void)23 void sun3_disable_interrupts(void)
24 {
25 sun3_disable_irq(0);
26 }
27
sun3_enable_interrupts(void)28 void sun3_enable_interrupts(void)
29 {
30 sun3_enable_irq(0);
31 }
32
33 static int led_pattern[8] = {
34 ~(0x80), ~(0x01),
35 ~(0x40), ~(0x02),
36 ~(0x20), ~(0x04),
37 ~(0x10), ~(0x08)
38 };
39
40 volatile unsigned char* sun3_intreg;
41
sun3_enable_irq(unsigned int irq)42 void sun3_enable_irq(unsigned int irq)
43 {
44 *sun3_intreg |= (1 << irq);
45 }
46
sun3_disable_irq(unsigned int irq)47 void sun3_disable_irq(unsigned int irq)
48 {
49 *sun3_intreg &= ~(1 << irq);
50 }
51
sun3_int7(int irq,void * dev_id)52 static irqreturn_t sun3_int7(int irq, void *dev_id)
53 {
54 *sun3_intreg |= (1 << irq);
55 if (!(kstat_cpu(0).irqs[irq] % 2000))
56 sun3_leds(led_pattern[(kstat_cpu(0).irqs[irq] % 16000) / 2000]);
57 return IRQ_HANDLED;
58 }
59
sun3_int5(int irq,void * dev_id)60 static irqreturn_t sun3_int5(int irq, void *dev_id)
61 {
62 #ifdef CONFIG_SUN3
63 intersil_clear();
64 #endif
65 *sun3_intreg |= (1 << irq);
66 #ifdef CONFIG_SUN3
67 intersil_clear();
68 #endif
69 do_timer(1);
70 #ifndef CONFIG_SMP
71 update_process_times(user_mode(get_irq_regs()));
72 #endif
73 if (!(kstat_cpu(0).irqs[irq] % 20))
74 sun3_leds(led_pattern[(kstat_cpu(0).irqs[irq] % 160) / 20]);
75 return IRQ_HANDLED;
76 }
77
sun3_vec255(int irq,void * dev_id)78 static irqreturn_t sun3_vec255(int irq, void *dev_id)
79 {
80 // intersil_clear();
81 return IRQ_HANDLED;
82 }
83
sun3_inthandle(unsigned int irq,struct pt_regs * fp)84 static void sun3_inthandle(unsigned int irq, struct pt_regs *fp)
85 {
86 *sun3_intreg &= ~(1 << irq);
87
88 __m68k_handle_int(irq, fp);
89 }
90
91 static struct irq_controller sun3_irq_controller = {
92 .name = "sun3",
93 .lock = __SPIN_LOCK_UNLOCKED(sun3_irq_controller.lock),
94 .startup = m68k_irq_startup,
95 .shutdown = m68k_irq_shutdown,
96 .enable = sun3_enable_irq,
97 .disable = sun3_disable_irq,
98 };
99
sun3_init_IRQ(void)100 void __init sun3_init_IRQ(void)
101 {
102 *sun3_intreg = 1;
103
104 m68k_setup_auto_interrupt(sun3_inthandle);
105 m68k_setup_irq_controller(&sun3_irq_controller, IRQ_AUTO_1, 7);
106 m68k_setup_user_interrupt(VEC_USER, 128, NULL);
107
108 if (request_irq(IRQ_AUTO_5, sun3_int5, 0, "int5", NULL))
109 pr_err("Couldn't register %s interrupt\n", "int5");
110 if (request_irq(IRQ_AUTO_7, sun3_int7, 0, "int7", NULL))
111 pr_err("Couldn't register %s interrupt\n", "int7");
112 if (request_irq(IRQ_USER+127, sun3_vec255, 0, "vec255", NULL))
113 pr_err("Couldn't register %s interrupt\n", "vec255");
114 }
115