Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * linux/arch/m68k/kernel/ints.c -- Linux/m68k general 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. | |
1da177e4 LT |
7 | */ |
8 | ||
1da177e4 LT |
9 | #include <linux/module.h> |
10 | #include <linux/types.h> | |
11 | #include <linux/sched.h> | |
6168a702 | 12 | #include <linux/interrupt.h> |
1da177e4 LT |
13 | #include <linux/errno.h> |
14 | #include <linux/init.h> | |
abcfc543 | 15 | #include <linux/irq.h> |
1da177e4 LT |
16 | |
17 | #include <asm/setup.h> | |
1da177e4 LT |
18 | #include <asm/irq.h> |
19 | #include <asm/traps.h> | |
20 | #include <asm/page.h> | |
21 | #include <asm/machdep.h> | |
68387c44 | 22 | #include <asm/cacheflush.h> |
2850bc27 | 23 | #include <asm/irq_regs.h> |
1da177e4 LT |
24 | |
25 | #ifdef CONFIG_Q40 | |
26 | #include <asm/q40ints.h> | |
27 | #endif | |
28 | ||
68387c44 | 29 | extern u32 auto_irqhandler_fixup[]; |
68387c44 RZ |
30 | extern u16 user_irqvec_fixup[]; |
31 | ||
68387c44 | 32 | static int m68k_first_user_vec; |
b5dc7840 | 33 | |
c288bf25 | 34 | static struct irq_chip auto_irq_chip = { |
b5dc7840 | 35 | .name = "auto", |
c288bf25 GU |
36 | .irq_startup = m68k_irq_startup, |
37 | .irq_shutdown = m68k_irq_shutdown, | |
b5dc7840 | 38 | }; |
1da177e4 | 39 | |
c288bf25 | 40 | static struct irq_chip user_irq_chip = { |
68387c44 | 41 | .name = "user", |
c288bf25 GU |
42 | .irq_startup = m68k_irq_startup, |
43 | .irq_shutdown = m68k_irq_shutdown, | |
1da177e4 LT |
44 | }; |
45 | ||
1da177e4 LT |
46 | /* |
47 | * void init_IRQ(void) | |
48 | * | |
49 | * Parameters: None | |
50 | * | |
51 | * Returns: Nothing | |
52 | * | |
53 | * This function should be called during kernel startup to initialize | |
54 | * the IRQ handling routines. | |
55 | */ | |
56 | ||
57 | void __init init_IRQ(void) | |
58 | { | |
59 | int i; | |
60 | ||
68387c44 | 61 | for (i = IRQ_AUTO_1; i <= IRQ_AUTO_7; i++) |
4936f63c | 62 | irq_set_chip_and_handler(i, &auto_irq_chip, handle_simple_irq); |
1da177e4 | 63 | |
68387c44 RZ |
64 | mach_init_IRQ(); |
65 | } | |
66 | ||
67 | /** | |
68 | * m68k_setup_auto_interrupt | |
69 | * @handler: called from auto vector interrupts | |
70 | * | |
71 | * setup the handler to be called from auto vector interrupts instead of the | |
1425df87 | 72 | * standard do_IRQ(), it will be called with irq numbers in the range |
68387c44 RZ |
73 | * from IRQ_AUTO_1 - IRQ_AUTO_7. |
74 | */ | |
75 | void __init m68k_setup_auto_interrupt(void (*handler)(unsigned int, struct pt_regs *)) | |
76 | { | |
77 | if (handler) | |
78 | *auto_irqhandler_fixup = (u32)handler; | |
79 | flush_icache(); | |
80 | } | |
81 | ||
82 | /** | |
83 | * m68k_setup_user_interrupt | |
84 | * @vec: first user vector interrupt to handle | |
85 | * @cnt: number of active user vector interrupts | |
68387c44 RZ |
86 | * |
87 | * setup user vector interrupts, this includes activating the specified range | |
88 | * of interrupts, only then these interrupts can be requested (note: this is | |
f30a6484 | 89 | * different from auto vector interrupts). |
68387c44 | 90 | */ |
f30a6484 | 91 | void __init m68k_setup_user_interrupt(unsigned int vec, unsigned int cnt) |
68387c44 RZ |
92 | { |
93 | int i; | |
94 | ||
27123cbc | 95 | BUG_ON(IRQ_USER + cnt > NR_IRQS); |
68387c44 RZ |
96 | m68k_first_user_vec = vec; |
97 | for (i = 0; i < cnt; i++) | |
378f7ca6 | 98 | irq_set_chip_and_handler(i, &user_irq_chip, handle_simple_irq); |
68387c44 | 99 | *user_irqvec_fixup = vec - IRQ_USER; |
68387c44 RZ |
100 | flush_icache(); |
101 | } | |
102 | ||
4936f63c GU |
103 | /** |
104 | * m68k_setup_irq_controller | |
105 | * @chip: irq chip which controls specified irq | |
106 | * @handle: flow handler which handles specified irq | |
107 | * @irq: first irq to be managed by the controller | |
108 | * @cnt: number of irqs to be managed by the controller | |
109 | * | |
110 | * Change the controller for the specified range of irq, which will be used to | |
111 | * manage these irq. auto/user irq already have a default controller, which can | |
112 | * be changed as well, but the controller probably should use m68k_irq_startup/ | |
113 | * m68k_irq_shutdown. | |
114 | */ | |
115 | void m68k_setup_irq_controller(struct irq_chip *chip, | |
116 | irq_flow_handler_t handle, unsigned int irq, | |
117 | unsigned int cnt) | |
118 | { | |
119 | int i; | |
120 | ||
121 | for (i = 0; i < cnt; i++) { | |
122 | irq_set_chip(irq + i, chip); | |
123 | if (handle) | |
124 | irq_set_handler(irq + i, handle); | |
125 | } | |
126 | } | |
127 | ||
e8abf5e7 | 128 | unsigned int m68k_irq_startup_irq(unsigned int irq) |
b5dc7840 RZ |
129 | { |
130 | if (irq <= IRQ_AUTO_7) | |
131 | vectors[VEC_SPUR + irq] = auto_inthandler; | |
68387c44 RZ |
132 | else |
133 | vectors[m68k_first_user_vec + irq - IRQ_USER] = user_inthandler; | |
b5dc7840 RZ |
134 | return 0; |
135 | } | |
136 | ||
e8abf5e7 | 137 | unsigned int m68k_irq_startup(struct irq_data *data) |
b5dc7840 | 138 | { |
e8abf5e7 GU |
139 | return m68k_irq_startup_irq(data->irq); |
140 | } | |
141 | ||
142 | void m68k_irq_shutdown(struct irq_data *data) | |
143 | { | |
144 | unsigned int irq = data->irq; | |
145 | ||
b5dc7840 RZ |
146 | if (irq <= IRQ_AUTO_7) |
147 | vectors[VEC_SPUR + irq] = bad_inthandler; | |
68387c44 RZ |
148 | else |
149 | vectors[m68k_first_user_vec + irq - IRQ_USER] = bad_inthandler; | |
b5dc7840 RZ |
150 | } |
151 | ||
152 | ||
68387c44 | 153 | unsigned int irq_canonicalize(unsigned int irq) |
1da177e4 | 154 | { |
68387c44 RZ |
155 | #ifdef CONFIG_Q40 |
156 | if (MACH_IS_Q40 && irq == 11) | |
157 | irq = 10; | |
158 | #endif | |
159 | return irq; | |
1da177e4 LT |
160 | } |
161 | ||
68387c44 | 162 | EXPORT_SYMBOL(irq_canonicalize); |
1da177e4 | 163 | |
4936f63c GU |
164 | |
165 | asmlinkage void handle_badint(struct pt_regs *regs) | |
166 | { | |
167 | atomic_inc(&irq_err_count); | |
168 | pr_warn("unexpected interrupt from %u\n", regs->vector); | |
169 | } |