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1da177e4 LT |
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 | ||
1da177e4 LT |
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 <linux/seq_file.h> | |
19 | ||
20 | extern void sun3_leds (unsigned char); | |
1da177e4 LT |
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 | int led_pattern[8] = { | |
33 | ~(0x80), ~(0x01), | |
34 | ~(0x40), ~(0x02), | |
35 | ~(0x20), ~(0x04), | |
36 | ~(0x10), ~(0x08) | |
37 | }; | |
38 | ||
39 | volatile unsigned char* sun3_intreg; | |
40 | ||
1da177e4 LT |
41 | void sun3_enable_irq(unsigned int irq) |
42 | { | |
ebba61d5 | 43 | *sun3_intreg |= (1 << irq); |
1da177e4 LT |
44 | } |
45 | ||
46 | void sun3_disable_irq(unsigned int irq) | |
47 | { | |
ebba61d5 | 48 | *sun3_intreg &= ~(1 << irq); |
1da177e4 LT |
49 | } |
50 | ||
51 | static irqreturn_t sun3_int7(int irq, void *dev_id, struct pt_regs *fp) | |
52 | { | |
ebba61d5 RZ |
53 | *sun3_intreg |= (1 << irq); |
54 | if (!(kstat_cpu(0).irqs[irq] % 2000)) | |
55 | sun3_leds(led_pattern[(kstat_cpu(0).irqs[irq] % 16000) / 2000]); | |
1da177e4 LT |
56 | return IRQ_HANDLED; |
57 | } | |
58 | ||
59 | static irqreturn_t sun3_int5(int irq, void *dev_id, struct pt_regs *fp) | |
60 | { | |
1da177e4 LT |
61 | #ifdef CONFIG_SUN3 |
62 | intersil_clear(); | |
63 | #endif | |
ebba61d5 | 64 | *sun3_intreg |= (1 << irq); |
1da177e4 LT |
65 | #ifdef CONFIG_SUN3 |
66 | intersil_clear(); | |
67 | #endif | |
3171a030 | 68 | do_timer(1); |
1da177e4 LT |
69 | #ifndef CONFIG_SMP |
70 | update_process_times(user_mode(fp)); | |
71 | #endif | |
ebba61d5 RZ |
72 | if (!(kstat_cpu(0).irqs[irq] % 20)) |
73 | sun3_leds(led_pattern[(kstat_cpu(0).irqs[irq] % 160) / 20]); | |
1da177e4 LT |
74 | return IRQ_HANDLED; |
75 | } | |
76 | ||
77 | static irqreturn_t sun3_vec255(int irq, void *dev_id, struct pt_regs *fp) | |
78 | { | |
79 | // intersil_clear(); | |
80 | return IRQ_HANDLED; | |
81 | } | |
82 | ||
ebba61d5 | 83 | static void sun3_inthandle(unsigned int irq, struct pt_regs *fp) |
1da177e4 | 84 | { |
ebba61d5 | 85 | *sun3_intreg &= ~(1 << irq); |
1da177e4 | 86 | |
ebba61d5 | 87 | m68k_handle_int(irq, fp); |
1da177e4 LT |
88 | } |
89 | ||
ebba61d5 RZ |
90 | static struct irq_controller sun3_irq_controller = { |
91 | .name = "sun3", | |
92 | .lock = SPIN_LOCK_UNLOCKED, | |
93 | .startup = m68k_irq_startup, | |
94 | .shutdown = m68k_irq_shutdown, | |
95 | .enable = sun3_enable_irq, | |
96 | .disable = sun3_disable_irq, | |
97 | }; | |
1da177e4 | 98 | |
ebba61d5 | 99 | void sun3_init_IRQ(void) |
1da177e4 | 100 | { |
ebba61d5 | 101 | *sun3_intreg = 1; |
1da177e4 | 102 | |
ebba61d5 RZ |
103 | m68k_setup_auto_interrupt(sun3_inthandle); |
104 | m68k_setup_irq_controller(&sun3_irq_controller, IRQ_AUTO_1, 7); | |
105 | m68k_setup_user_interrupt(VEC_USER, 192, NULL); | |
1da177e4 | 106 | |
ebba61d5 RZ |
107 | request_irq(IRQ_AUTO_5, sun3_int5, 0, "int5", NULL); |
108 | request_irq(IRQ_AUTO_7, sun3_int7, 0, "int7", NULL); | |
109 | request_irq(IRQ_USER+127, sun3_vec255, 0, "vec255", NULL); | |
1da177e4 | 110 | } |