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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/intersil.h>
15#include <asm/oplib.h>
16#include <asm/sun3ints.h>
17#include <asm/irq_regs.h>
18#include <linux/seq_file.h>
19
20extern void sun3_leds (unsigned char);
21
22void sun3_disable_interrupts(void)
23{
24 sun3_disable_irq(0);
25}
26
27void sun3_enable_interrupts(void)
28{
29 sun3_enable_irq(0);
30}
31
32static int led_pattern[8] = {
33 ~(0x80), ~(0x01),
34 ~(0x40), ~(0x02),
35 ~(0x20), ~(0x04),
36 ~(0x10), ~(0x08)
37};
38
39volatile unsigned char* sun3_intreg;
40
41void sun3_enable_irq(unsigned int irq)
42{
43 *sun3_intreg |= (1 << irq);
44}
45
46void sun3_disable_irq(unsigned int irq)
47{
48 *sun3_intreg &= ~(1 << irq);
49}
50
51static irqreturn_t sun3_int7(int irq, void *dev_id)
52{
53 unsigned int cnt;
54
55 cnt = kstat_irqs_cpu(irq, 0);
56 if (!(cnt % 2000))
57 sun3_leds(led_pattern[cnt % 16000 / 2000]);
58 return IRQ_HANDLED;
59}
60
61static irqreturn_t sun3_int5(int irq, void *dev_id)
62{
63 unsigned long flags;
64 unsigned int cnt;
65
66 local_irq_save(flags);
67#ifdef CONFIG_SUN3
68 intersil_clear();
69#endif
70 sun3_disable_irq(5);
71 sun3_enable_irq(5);
72#ifdef CONFIG_SUN3
73 intersil_clear();
74#endif
75 legacy_timer_tick(1);
76 cnt = kstat_irqs_cpu(irq, 0);
77 if (!(cnt % 20))
78 sun3_leds(led_pattern[cnt % 160 / 20]);
79 local_irq_restore(flags);
80 return IRQ_HANDLED;
81}
82
83static irqreturn_t sun3_vec255(int irq, void *dev_id)
84{
85 return IRQ_HANDLED;
86}
87
88void __init sun3_init_IRQ(void)
89{
90 *sun3_intreg = 1;
91
92 m68k_setup_user_interrupt(VEC_USER, 128);
93
94 if (request_irq(IRQ_AUTO_5, sun3_int5, 0, "clock", NULL))
95 pr_err("Couldn't register %s interrupt\n", "int5");
96 if (request_irq(IRQ_AUTO_7, sun3_int7, 0, "nmi", NULL))
97 pr_err("Couldn't register %s interrupt\n", "int7");
98 if (request_irq(IRQ_USER+127, sun3_vec255, 0, "vec255", NULL))
99 pr_err("Couldn't register %s interrupt\n", "vec255");
100}
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
21extern void sun3_leds (unsigned char);
22
23void sun3_disable_interrupts(void)
24{
25 sun3_disable_irq(0);
26}
27
28void sun3_enable_interrupts(void)
29{
30 sun3_enable_irq(0);
31}
32
33static int led_pattern[8] = {
34 ~(0x80), ~(0x01),
35 ~(0x40), ~(0x02),
36 ~(0x20), ~(0x04),
37 ~(0x10), ~(0x08)
38};
39
40volatile unsigned char* sun3_intreg;
41
42void sun3_enable_irq(unsigned int irq)
43{
44 *sun3_intreg |= (1 << irq);
45}
46
47void sun3_disable_irq(unsigned int irq)
48{
49 *sun3_intreg &= ~(1 << irq);
50}
51
52static 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
60static 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 xtime_update(1);
70 update_process_times(user_mode(get_irq_regs()));
71 if (!(kstat_cpu(0).irqs[irq] % 20))
72 sun3_leds(led_pattern[(kstat_cpu(0).irqs[irq] % 160) / 20]);
73 return IRQ_HANDLED;
74}
75
76static irqreturn_t sun3_vec255(int irq, void *dev_id)
77{
78// intersil_clear();
79 return IRQ_HANDLED;
80}
81
82static void sun3_inthandle(unsigned int irq, struct pt_regs *fp)
83{
84 *sun3_intreg &= ~(1 << irq);
85
86 __m68k_handle_int(irq, fp);
87}
88
89static struct irq_controller sun3_irq_controller = {
90 .name = "sun3",
91 .lock = __SPIN_LOCK_UNLOCKED(sun3_irq_controller.lock),
92 .startup = m68k_irq_startup,
93 .shutdown = m68k_irq_shutdown,
94 .enable = sun3_enable_irq,
95 .disable = sun3_disable_irq,
96};
97
98void __init sun3_init_IRQ(void)
99{
100 *sun3_intreg = 1;
101
102 m68k_setup_auto_interrupt(sun3_inthandle);
103 m68k_setup_irq_controller(&sun3_irq_controller, IRQ_AUTO_1, 7);
104 m68k_setup_user_interrupt(VEC_USER, 128, NULL);
105
106 if (request_irq(IRQ_AUTO_5, sun3_int5, 0, "int5", NULL))
107 pr_err("Couldn't register %s interrupt\n", "int5");
108 if (request_irq(IRQ_AUTO_7, sun3_int7, 0, "int7", NULL))
109 pr_err("Couldn't register %s interrupt\n", "int7");
110 if (request_irq(IRQ_USER+127, sun3_vec255, 0, "vec255", NULL))
111 pr_err("Couldn't register %s interrupt\n", "vec255");
112}