1 /* 1 /*
2 * linux/arch/m68k/kernel/ints.c -- Linux/m68k 2 * linux/arch/m68k/kernel/ints.c -- Linux/m68k general interrupt handling code
3 * 3 *
4 * This file is subject to the terms and condi 4 * This file is subject to the terms and conditions of the GNU General Public
5 * License. See the file COPYING in the main 5 * License. See the file COPYING in the main directory of this archive
6 * for more details. 6 * for more details.
7 */ 7 */
8 8
9 #include <linux/module.h> 9 #include <linux/module.h>
10 #include <linux/types.h> 10 #include <linux/types.h>
11 #include <linux/sched.h> 11 #include <linux/sched.h>
12 #include <linux/interrupt.h> 12 #include <linux/interrupt.h>
13 #include <linux/errno.h> 13 #include <linux/errno.h>
14 #include <linux/init.h> 14 #include <linux/init.h>
15 #include <linux/irq.h> 15 #include <linux/irq.h>
16 16
17 #include <asm/setup.h> 17 #include <asm/setup.h>
18 #include <asm/irq.h> 18 #include <asm/irq.h>
19 #include <asm/traps.h> 19 #include <asm/traps.h>
20 #include <asm/page.h> 20 #include <asm/page.h>
21 #include <asm/machdep.h> 21 #include <asm/machdep.h>
22 #include <asm/cacheflush.h> 22 #include <asm/cacheflush.h>
23 #include <asm/irq_regs.h> 23 #include <asm/irq_regs.h>
24 24
25 #ifdef CONFIG_Q40 25 #ifdef CONFIG_Q40
26 #include <asm/q40ints.h> 26 #include <asm/q40ints.h>
27 #endif 27 #endif
28 28
29 #include "ints.h" <<
30 <<
31 extern u32 auto_irqhandler_fixup[]; 29 extern u32 auto_irqhandler_fixup[];
32 extern u16 user_irqvec_fixup[]; 30 extern u16 user_irqvec_fixup[];
33 31
34 static int m68k_first_user_vec; 32 static int m68k_first_user_vec;
35 33
36 static struct irq_chip auto_irq_chip = { 34 static struct irq_chip auto_irq_chip = {
37 .name = "auto", 35 .name = "auto",
38 .irq_startup = m68k_irq_startup, 36 .irq_startup = m68k_irq_startup,
39 .irq_shutdown = m68k_irq_shutdown, 37 .irq_shutdown = m68k_irq_shutdown,
40 }; 38 };
41 39
42 static struct irq_chip user_irq_chip = { 40 static struct irq_chip user_irq_chip = {
43 .name = "user", 41 .name = "user",
44 .irq_startup = m68k_irq_startup, 42 .irq_startup = m68k_irq_startup,
45 .irq_shutdown = m68k_irq_shutdown, 43 .irq_shutdown = m68k_irq_shutdown,
46 }; 44 };
47 45
48 /* 46 /*
49 * void init_IRQ(void) 47 * void init_IRQ(void)
50 * 48 *
51 * Parameters: None 49 * Parameters: None
52 * 50 *
53 * Returns: Nothing 51 * Returns: Nothing
54 * 52 *
55 * This function should be called during kerne 53 * This function should be called during kernel startup to initialize
56 * the IRQ handling routines. 54 * the IRQ handling routines.
57 */ 55 */
58 56
59 void __init init_IRQ(void) 57 void __init init_IRQ(void)
60 { 58 {
61 int i; 59 int i;
62 60
63 for (i = IRQ_AUTO_1; i <= IRQ_AUTO_7; 61 for (i = IRQ_AUTO_1; i <= IRQ_AUTO_7; i++)
64 irq_set_chip_and_handler(i, &a 62 irq_set_chip_and_handler(i, &auto_irq_chip, handle_simple_irq);
65 63
66 mach_init_IRQ(); 64 mach_init_IRQ();
67 } 65 }
68 66
69 /** 67 /**
70 * m68k_setup_auto_interrupt 68 * m68k_setup_auto_interrupt
71 * @handler: called from auto vector interrupt 69 * @handler: called from auto vector interrupts
72 * 70 *
73 * setup the handler to be called from auto ve 71 * setup the handler to be called from auto vector interrupts instead of the
74 * standard do_IRQ(), it will be called with i 72 * standard do_IRQ(), it will be called with irq numbers in the range
75 * from IRQ_AUTO_1 - IRQ_AUTO_7. 73 * from IRQ_AUTO_1 - IRQ_AUTO_7.
76 */ 74 */
77 void __init m68k_setup_auto_interrupt(void (*h 75 void __init m68k_setup_auto_interrupt(void (*handler)(unsigned int, struct pt_regs *))
78 { 76 {
79 if (handler) 77 if (handler)
80 *auto_irqhandler_fixup = (u32) 78 *auto_irqhandler_fixup = (u32)handler;
81 flush_icache(); 79 flush_icache();
82 } 80 }
83 81
84 /** 82 /**
85 * m68k_setup_user_interrupt 83 * m68k_setup_user_interrupt
86 * @vec: first user vector interrupt to handle 84 * @vec: first user vector interrupt to handle
87 * @cnt: number of active user vector interrup 85 * @cnt: number of active user vector interrupts
88 * 86 *
89 * setup user vector interrupts, this includes 87 * setup user vector interrupts, this includes activating the specified range
90 * of interrupts, only then these interrupts c 88 * of interrupts, only then these interrupts can be requested (note: this is
91 * different from auto vector interrupts). 89 * different from auto vector interrupts).
92 */ 90 */
93 void __init m68k_setup_user_interrupt(unsigned 91 void __init m68k_setup_user_interrupt(unsigned int vec, unsigned int cnt)
94 { 92 {
95 int i; 93 int i;
96 94
97 BUG_ON(IRQ_USER + cnt > NR_IRQS); 95 BUG_ON(IRQ_USER + cnt > NR_IRQS);
98 m68k_first_user_vec = vec; 96 m68k_first_user_vec = vec;
99 for (i = 0; i < cnt; i++) 97 for (i = 0; i < cnt; i++)
100 irq_set_chip_and_handler(i, &u 98 irq_set_chip_and_handler(i, &user_irq_chip, handle_simple_irq);
101 *user_irqvec_fixup = vec - IRQ_USER; 99 *user_irqvec_fixup = vec - IRQ_USER;
102 flush_icache(); 100 flush_icache();
103 } 101 }
104 102
105 /** 103 /**
106 * m68k_setup_irq_controller 104 * m68k_setup_irq_controller
107 * @chip: irq chip which controls specified ir 105 * @chip: irq chip which controls specified irq
108 * @handle: flow handler which handles specifi 106 * @handle: flow handler which handles specified irq
109 * @irq: first irq to be managed by the contro 107 * @irq: first irq to be managed by the controller
110 * @cnt: number of irqs to be managed by the c 108 * @cnt: number of irqs to be managed by the controller
111 * 109 *
112 * Change the controller for the specified ran 110 * Change the controller for the specified range of irq, which will be used to
113 * manage these irq. auto/user irq already hav 111 * manage these irq. auto/user irq already have a default controller, which can
114 * be changed as well, but the controller prob 112 * be changed as well, but the controller probably should use m68k_irq_startup/
115 * m68k_irq_shutdown. 113 * m68k_irq_shutdown.
116 */ 114 */
117 void m68k_setup_irq_controller(struct irq_chip 115 void m68k_setup_irq_controller(struct irq_chip *chip,
118 irq_flow_handle 116 irq_flow_handler_t handle, unsigned int irq,
119 unsigned int cn 117 unsigned int cnt)
120 { 118 {
121 int i; 119 int i;
122 120
123 for (i = 0; i < cnt; i++) { 121 for (i = 0; i < cnt; i++) {
124 irq_set_chip(irq + i, chip); 122 irq_set_chip(irq + i, chip);
125 if (handle) 123 if (handle)
126 irq_set_handler(irq + 124 irq_set_handler(irq + i, handle);
127 } 125 }
128 } 126 }
129 127
130 unsigned int m68k_irq_startup_irq(unsigned int 128 unsigned int m68k_irq_startup_irq(unsigned int irq)
131 { 129 {
132 if (irq <= IRQ_AUTO_7) 130 if (irq <= IRQ_AUTO_7)
133 vectors[VEC_SPUR + irq] = auto 131 vectors[VEC_SPUR + irq] = auto_inthandler;
134 else 132 else
135 vectors[m68k_first_user_vec + 133 vectors[m68k_first_user_vec + irq - IRQ_USER] = user_inthandler;
136 return 0; 134 return 0;
137 } 135 }
138 136
139 unsigned int m68k_irq_startup(struct irq_data 137 unsigned int m68k_irq_startup(struct irq_data *data)
140 { 138 {
141 return m68k_irq_startup_irq(data->irq) 139 return m68k_irq_startup_irq(data->irq);
142 } 140 }
143 141
144 void m68k_irq_shutdown(struct irq_data *data) 142 void m68k_irq_shutdown(struct irq_data *data)
145 { 143 {
146 unsigned int irq = data->irq; 144 unsigned int irq = data->irq;
147 145
148 if (irq <= IRQ_AUTO_7) 146 if (irq <= IRQ_AUTO_7)
149 vectors[VEC_SPUR + irq] = bad_ 147 vectors[VEC_SPUR + irq] = bad_inthandler;
150 else 148 else
151 vectors[m68k_first_user_vec + 149 vectors[m68k_first_user_vec + irq - IRQ_USER] = bad_inthandler;
152 } 150 }
153 151
154 152
155 unsigned int irq_canonicalize(unsigned int irq 153 unsigned int irq_canonicalize(unsigned int irq)
156 { 154 {
157 #ifdef CONFIG_Q40 155 #ifdef CONFIG_Q40
158 if (MACH_IS_Q40 && irq == 11) 156 if (MACH_IS_Q40 && irq == 11)
159 irq = 10; 157 irq = 10;
160 #endif 158 #endif
161 return irq; 159 return irq;
162 } 160 }
163 161
164 EXPORT_SYMBOL(irq_canonicalize); 162 EXPORT_SYMBOL(irq_canonicalize);
165 163
166 164
167 asmlinkage void handle_badint(struct pt_regs * 165 asmlinkage void handle_badint(struct pt_regs *regs)
168 { 166 {
169 atomic_inc(&irq_err_count); 167 atomic_inc(&irq_err_count);
170 pr_warn("unexpected interrupt from %u\ 168 pr_warn("unexpected interrupt from %u\n", regs->vector);
171 } 169 }
172 170
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