1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
|
/*
* linux/arch/h8300/platform/h8300h/ints.c
*
* Yoshinori Sato <ysato@users.sourceforge.jp>
*
* Based on linux/arch/$(ARCH)/platform/$(PLATFORM)/ints.c
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file COPYING in the main directory of this archive
* for more details.
*
* Copyright 1996 Roman Zippel
* Copyright 1999 D. Jeff Dionne <jeff@rt-control.com>
*/
#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/kernel_stat.h>
#include <linux/seq_file.h>
#include <linux/init.h>
#include <linux/random.h>
#include <linux/bootmem.h>
#include <linux/hardirq.h>
#include <asm/system.h>
#include <asm/irq.h>
#include <asm/traps.h>
#include <asm/io.h>
#include <asm/setup.h>
#include <asm/errno.h>
/*
* This structure has only 4 elements for speed reasons
*/
typedef struct irq_handler {
irqreturn_t (*handler)(int, void *, struct pt_regs *);
int flags;
int count;
void *dev_id;
const char *devname;
} irq_handler_t;
static irq_handler_t *irq_list[NR_IRQS];
static int use_kmalloc;
extern unsigned long *interrupt_redirect_table;
extern const int h8300_saved_vectors[];
extern const unsigned long h8300_trap_table[];
int h8300_enable_irq_pin(unsigned int irq);
void h8300_disable_irq_pin(unsigned int irq);
#define CPU_VECTOR ((unsigned long *)0x000000)
#define ADDR_MASK (0xffffff)
#if defined(CONFIG_RAMKERNEL)
static unsigned long __init *get_vector_address(void)
{
unsigned long *rom_vector = CPU_VECTOR;
unsigned long base,tmp;
int vec_no;
base = rom_vector[EXT_IRQ0] & ADDR_MASK;
/* check romvector format */
for (vec_no = EXT_IRQ1; vec_no <= EXT_IRQ0+EXT_IRQS; vec_no++) {
if ((base+(vec_no - EXT_IRQ0)*4) != (rom_vector[vec_no] & ADDR_MASK))
return NULL;
}
/* ramvector base address */
base -= EXT_IRQ0*4;
/* writerble check */
tmp = ~(*(volatile unsigned long *)base);
(*(volatile unsigned long *)base) = tmp;
if ((*(volatile unsigned long *)base) != tmp)
return NULL;
return (unsigned long *)base;
}
#endif
void __init init_IRQ(void)
{
#if defined(CONFIG_RAMKERNEL)
int i;
unsigned long *ramvec,*ramvec_p;
const unsigned long *trap_entry;
const int *saved_vector;
ramvec = get_vector_address();
if (ramvec == NULL)
panic("interrupt vector serup failed.");
else
printk(KERN_INFO "virtual vector at 0x%08lx\n",(unsigned long)ramvec);
/* create redirect table */
ramvec_p = ramvec;
trap_entry = h8300_trap_table;
saved_vector = h8300_saved_vectors;
for ( i = 0; i < NR_IRQS; i++) {
if (i == *saved_vector) {
ramvec_p++;
saved_vector++;
} else {
if ( i < NR_TRAPS ) {
if (*trap_entry)
*ramvec_p = VECTOR(*trap_entry);
ramvec_p++;
trap_entry++;
} else
*ramvec_p++ = REDIRECT(interrupt_entry);
}
}
interrupt_redirect_table = ramvec;
#ifdef DUMP_VECTOR
ramvec_p = ramvec;
for (i = 0; i < NR_IRQS; i++) {
if ((i % 8) == 0)
printk(KERN_DEBUG "\n%p: ",ramvec_p);
printk(KERN_DEBUG "%p ",*ramvec_p);
ramvec_p++;
}
printk(KERN_DEBUG "\n");
#endif
#endif
}
int request_irq(unsigned int irq,
irqreturn_t (*handler)(int, void *, struct pt_regs *),
unsigned long flags, const char *devname, void *dev_id)
{
irq_handler_t *irq_handle;
if (irq < 0 || irq >= NR_IRQS) {
printk(KERN_ERR "Incorrect IRQ %d from %s\n", irq, devname);
return -EINVAL;
}
if (irq_list[irq] || (h8300_enable_irq_pin(irq) == -EBUSY))
return -EBUSY;
if (use_kmalloc)
irq_handle = (irq_handler_t *)kmalloc(sizeof(irq_handler_t), GFP_ATOMIC);
else {
/* use bootmem allocater */
irq_handle = (irq_handler_t *)alloc_bootmem(sizeof(irq_handler_t));
irq_handle = (irq_handler_t *)((unsigned long)irq_handle | 0x80000000);
}
if (irq_handle == NULL)
return -ENOMEM;
irq_handle->handler = handler;
irq_handle->flags = flags;
irq_handle->count = 0;
irq_handle->dev_id = dev_id;
irq_handle->devname = devname;
irq_list[irq] = irq_handle;
if (irq_handle->flags & IRQF_SAMPLE_RANDOM)
rand_initialize_irq(irq);
enable_irq(irq);
return 0;
}
EXPORT_SYMBOL(request_irq);
void free_irq(unsigned int irq, void *dev_id)
{
if (irq >= NR_IRQS)
return;
if (!irq_list[irq] || irq_list[irq]->dev_id != dev_id)
printk(KERN_WARNING "Removing probably wrong IRQ %d from %s\n",
irq, irq_list[irq]->devname);
disable_irq(irq);
h8300_disable_irq_pin(irq);
if (((unsigned long)irq_list[irq] & 0x80000000) == 0) {
kfree(irq_list[irq]);
irq_list[irq] = NULL;
}
}
EXPORT_SYMBOL(free_irq);
/*
* Do we need these probe functions on the m68k?
*/
unsigned long probe_irq_on (void)
{
return 0;
}
EXPORT_SYMBOL(probe_irq_on);
int probe_irq_off (unsigned long irqs)
{
return 0;
}
EXPORT_SYMBOL(probe_irq_off);
void enable_irq(unsigned int irq)
{
if (irq >= EXT_IRQ0 && irq <= (EXT_IRQ0 + EXT_IRQS))
IER_REGS |= 1 << (irq - EXT_IRQ0);
}
void disable_irq(unsigned int irq)
{
if (irq >= EXT_IRQ0 && irq <= (EXT_IRQ0 + EXT_IRQS))
IER_REGS &= ~(1 << (irq - EXT_IRQ0));
}
asmlinkage void process_int(int irq, struct pt_regs *fp)
{
irq_enter();
h8300_clear_isr(irq);
if (irq >= NR_TRAPS && irq < NR_IRQS) {
if (irq_list[irq]) {
irq_list[irq]->handler(irq, irq_list[irq]->dev_id, fp);
irq_list[irq]->count++;
if (irq_list[irq]->flags & IRQF_SAMPLE_RANDOM)
add_interrupt_randomness(irq);
}
} else {
BUG();
}
irq_exit();
}
int show_interrupts(struct seq_file *p, void *v)
{
int i = *(loff_t *) v;
if ((i < NR_IRQS) && (irq_list[i]!=NULL)) {
seq_printf(p, "%3d: %10u ",i,irq_list[i]->count);
seq_printf(p, "%s\n", irq_list[i]->devname);
}
return 0;
}
void init_irq_proc(void)
{
}
static int __init enable_kmalloc(void)
{
use_kmalloc = 1;
return 0;
}
core_initcall(enable_kmalloc);
|
