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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.
7 */
8
9#include <linux/module.h>
10#include <linux/types.h>
11#include <linux/sched.h>
12#include <linux/interrupt.h>
13#include <linux/errno.h>
14#include <linux/init.h>
15#include <linux/irq.h>
16
17#include <asm/setup.h>
18#include <asm/irq.h>
19#include <asm/traps.h>
20#include <asm/page.h>
21#include <asm/machdep.h>
22#include <asm/cacheflush.h>
23#include <asm/irq_regs.h>
24
25#ifdef CONFIG_Q40
26#include <asm/q40ints.h>
27#endif
28
29extern u32 auto_irqhandler_fixup[];
30extern u16 user_irqvec_fixup[];
31
32static int m68k_first_user_vec;
33
34static struct irq_chip auto_irq_chip = {
35 .name = "auto",
36 .irq_startup = m68k_irq_startup,
37 .irq_shutdown = m68k_irq_shutdown,
38};
39
40static struct irq_chip user_irq_chip = {
41 .name = "user",
42 .irq_startup = m68k_irq_startup,
43 .irq_shutdown = m68k_irq_shutdown,
44};
45
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
57void __init init_IRQ(void)
58{
59 int i;
60
61 for (i = IRQ_AUTO_1; i <= IRQ_AUTO_7; i++)
62 irq_set_chip_and_handler(i, &auto_irq_chip, handle_simple_irq);
63
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
72 * standard do_IRQ(), it will be called with irq numbers in the range
73 * from IRQ_AUTO_1 - IRQ_AUTO_7.
74 */
75void __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
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
89 * different from auto vector interrupts).
90 */
91void __init m68k_setup_user_interrupt(unsigned int vec, unsigned int cnt)
92{
93 int i;
94
95 BUG_ON(IRQ_USER + cnt > NR_IRQS);
96 m68k_first_user_vec = vec;
97 for (i = 0; i < cnt; i++)
98 irq_set_chip_and_handler(i, &user_irq_chip, handle_simple_irq);
99 *user_irqvec_fixup = vec - IRQ_USER;
100 flush_icache();
101}
102
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 */
115void 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
128unsigned int m68k_irq_startup_irq(unsigned int irq)
129{
130 if (irq <= IRQ_AUTO_7)
131 vectors[VEC_SPUR + irq] = auto_inthandler;
132 else
133 vectors[m68k_first_user_vec + irq - IRQ_USER] = user_inthandler;
134 return 0;
135}
136
137unsigned int m68k_irq_startup(struct irq_data *data)
138{
139 return m68k_irq_startup_irq(data->irq);
140}
141
142void m68k_irq_shutdown(struct irq_data *data)
143{
144 unsigned int irq = data->irq;
145
146 if (irq <= IRQ_AUTO_7)
147 vectors[VEC_SPUR + irq] = bad_inthandler;
148 else
149 vectors[m68k_first_user_vec + irq - IRQ_USER] = bad_inthandler;
150}
151
152
153unsigned int irq_canonicalize(unsigned int irq)
154{
155#ifdef CONFIG_Q40
156 if (MACH_IS_Q40 && irq == 11)
157 irq = 10;
158#endif
159 return irq;
160}
161
162EXPORT_SYMBOL(irq_canonicalize);
163
164
165asmlinkage 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}
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.
7 */
8
9#include <linux/module.h>
10#include <linux/types.h>
11#include <linux/sched.h>
12#include <linux/interrupt.h>
13#include <linux/errno.h>
14#include <linux/init.h>
15#include <linux/irq.h>
16
17#include <asm/setup.h>
18#include <asm/irq.h>
19#include <asm/traps.h>
20#include <asm/page.h>
21#include <asm/machdep.h>
22#include <asm/cacheflush.h>
23#include <asm/irq_regs.h>
24
25#ifdef CONFIG_Q40
26#include <asm/q40ints.h>
27#endif
28
29extern u32 auto_irqhandler_fixup[];
30extern u16 user_irqvec_fixup[];
31
32static int m68k_first_user_vec;
33
34static struct irq_chip auto_irq_chip = {
35 .name = "auto",
36 .irq_startup = m68k_irq_startup,
37 .irq_shutdown = m68k_irq_shutdown,
38};
39
40static struct irq_chip user_irq_chip = {
41 .name = "user",
42 .irq_startup = m68k_irq_startup,
43 .irq_shutdown = m68k_irq_shutdown,
44};
45
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
57void __init init_IRQ(void)
58{
59 int i;
60
61 for (i = IRQ_AUTO_1; i <= IRQ_AUTO_7; i++)
62 irq_set_chip_and_handler(i, &auto_irq_chip, handle_simple_irq);
63
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
72 * standard do_IRQ(), it will be called with irq numbers in the range
73 * from IRQ_AUTO_1 - IRQ_AUTO_7.
74 */
75void __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
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
89 * different from auto vector interrupts).
90 */
91void __init m68k_setup_user_interrupt(unsigned int vec, unsigned int cnt)
92{
93 int i;
94
95 BUG_ON(IRQ_USER + cnt > NR_IRQS);
96 m68k_first_user_vec = vec;
97 for (i = 0; i < cnt; i++)
98 irq_set_chip_and_handler(i, &user_irq_chip, handle_simple_irq);
99 *user_irqvec_fixup = vec - IRQ_USER;
100 flush_icache();
101}
102
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 */
115void 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
128unsigned int m68k_irq_startup_irq(unsigned int irq)
129{
130 if (irq <= IRQ_AUTO_7)
131 vectors[VEC_SPUR + irq] = auto_inthandler;
132 else
133 vectors[m68k_first_user_vec + irq - IRQ_USER] = user_inthandler;
134 return 0;
135}
136
137unsigned int m68k_irq_startup(struct irq_data *data)
138{
139 return m68k_irq_startup_irq(data->irq);
140}
141
142void m68k_irq_shutdown(struct irq_data *data)
143{
144 unsigned int irq = data->irq;
145
146 if (irq <= IRQ_AUTO_7)
147 vectors[VEC_SPUR + irq] = bad_inthandler;
148 else
149 vectors[m68k_first_user_vec + irq - IRQ_USER] = bad_inthandler;
150}
151
152
153unsigned int irq_canonicalize(unsigned int irq)
154{
155#ifdef CONFIG_Q40
156 if (MACH_IS_Q40 && irq == 11)
157 irq = 10;
158#endif
159 return irq;
160}
161
162EXPORT_SYMBOL(irq_canonicalize);
163
164
165asmlinkage 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}