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 | |
20 | #include "sun3.h" |
21 | |
22 | void sun3_disable_interrupts(void) |
23 | { |
24 | sun3_disable_irq(0); |
25 | } |
26 | |
27 | void sun3_enable_interrupts(void) |
28 | { |
29 | sun3_enable_irq(0); |
30 | } |
31 | |
32 | static unsigned char led_pattern[8] = { |
33 | (u8)~(0x80), (u8)~(0x01), |
34 | (u8)~(0x40), (u8)~(0x02), |
35 | (u8)~(0x20), (u8)~(0x04), |
36 | (u8)~(0x10), (u8)~(0x08) |
37 | }; |
38 | |
39 | volatile unsigned char* sun3_intreg; |
40 | |
41 | void sun3_enable_irq(unsigned int irq) |
42 | { |
43 | *sun3_intreg |= (1 << irq); |
44 | } |
45 | |
46 | void sun3_disable_irq(unsigned int irq) |
47 | { |
48 | *sun3_intreg &= ~(1 << irq); |
49 | } |
50 | |
51 | static irqreturn_t sun3_int7(int irq, void *dev_id) |
52 | { |
53 | unsigned int cnt; |
54 | |
55 | cnt = kstat_irqs_cpu(irq, cpu: 0); |
56 | if (!(cnt % 2000)) |
57 | sun3_leds(byte: led_pattern[cnt % 16000 / 2000]); |
58 | return IRQ_HANDLED; |
59 | } |
60 | |
61 | static 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(ticks: 1); |
76 | cnt = kstat_irqs_cpu(irq, cpu: 0); |
77 | if (!(cnt % 20)) |
78 | sun3_leds(byte: led_pattern[cnt % 160 / 20]); |
79 | local_irq_restore(flags); |
80 | return IRQ_HANDLED; |
81 | } |
82 | |
83 | static irqreturn_t sun3_vec255(int irq, void *dev_id) |
84 | { |
85 | return IRQ_HANDLED; |
86 | } |
87 | |
88 | void __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: IRQ_AUTO_5, handler: sun3_int5, flags: 0, name: "clock" , NULL)) |
95 | pr_err("Couldn't register %s interrupt\n" , "int5" ); |
96 | if (request_irq(irq: IRQ_AUTO_7, handler: sun3_int7, flags: 0, name: "nmi" , NULL)) |
97 | pr_err("Couldn't register %s interrupt\n" , "int7" ); |
98 | if (request_irq(irq: IRQ_USER+127, handler: sun3_vec255, flags: 0, name: "vec255" , NULL)) |
99 | pr_err("Couldn't register %s interrupt\n" , "vec255" ); |
100 | } |
101 | |