aboutsummaryrefslogtreecommitdiffstats
path: root/arch/h8300/kernel/ints.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/h8300/kernel/ints.c')
-rw-r--r--arch/h8300/kernel/ints.c256
1 files changed, 0 insertions, 256 deletions
diff --git a/arch/h8300/kernel/ints.c b/arch/h8300/kernel/ints.c
deleted file mode 100644
index 3e4f479271c9..000000000000
--- a/arch/h8300/kernel/ints.c
+++ /dev/null
@@ -1,256 +0,0 @@
1/*
2 * linux/arch/h8300/kernel/ints.c
3 *
4 * Yoshinori Sato <ysato@users.sourceforge.jp>
5 *
6 * Based on linux/arch/$(ARCH)/platform/$(PLATFORM)/ints.c
7 *
8 * This file is subject to the terms and conditions of the GNU General Public
9 * License. See the file COPYING in the main directory of this archive
10 * for more details.
11 *
12 * Copyright 1996 Roman Zippel
13 * Copyright 1999 D. Jeff Dionne <jeff@rt-control.com>
14 */
15
16#include <linux/module.h>
17#include <linux/types.h>
18#include <linux/kernel.h>
19#include <linux/sched.h>
20#include <linux/kernel_stat.h>
21#include <linux/seq_file.h>
22#include <linux/interrupt.h>
23#include <linux/init.h>
24#include <linux/random.h>
25#include <linux/bootmem.h>
26#include <linux/hardirq.h>
27
28#include <asm/system.h>
29#include <asm/irq.h>
30#include <asm/traps.h>
31#include <asm/io.h>
32#include <asm/setup.h>
33#include <asm/errno.h>
34
35/*
36 * This structure has only 4 elements for speed reasons
37 */
38typedef struct irq_handler {
39 irqreturn_t (*handler)(int, void *, struct pt_regs *);
40 int flags;
41 int count;
42 void *dev_id;
43 const char *devname;
44} irq_handler_t;
45
46static irq_handler_t *irq_list[NR_IRQS];
47static int use_kmalloc;
48
49extern unsigned long *interrupt_redirect_table;
50extern const int h8300_saved_vectors[];
51extern const unsigned long h8300_trap_table[];
52int h8300_enable_irq_pin(unsigned int irq);
53void h8300_disable_irq_pin(unsigned int irq);
54
55#define CPU_VECTOR ((unsigned long *)0x000000)
56#define ADDR_MASK (0xffffff)
57
58#if defined(CONFIG_RAMKERNEL)
59static unsigned long __init *get_vector_address(void)
60{
61 unsigned long *rom_vector = CPU_VECTOR;
62 unsigned long base,tmp;
63 int vec_no;
64
65 base = rom_vector[EXT_IRQ0] & ADDR_MASK;
66
67 /* check romvector format */
68 for (vec_no = EXT_IRQ1; vec_no <= EXT_IRQ0+EXT_IRQS; vec_no++) {
69 if ((base+(vec_no - EXT_IRQ0)*4) != (rom_vector[vec_no] & ADDR_MASK))
70 return NULL;
71 }
72
73 /* ramvector base address */
74 base -= EXT_IRQ0*4;
75
76 /* writerble check */
77 tmp = ~(*(volatile unsigned long *)base);
78 (*(volatile unsigned long *)base) = tmp;
79 if ((*(volatile unsigned long *)base) != tmp)
80 return NULL;
81 return (unsigned long *)base;
82}
83#endif
84
85void __init init_IRQ(void)
86{
87#if defined(CONFIG_RAMKERNEL)
88 int i;
89 unsigned long *ramvec,*ramvec_p;
90 const unsigned long *trap_entry;
91 const int *saved_vector;
92
93 ramvec = get_vector_address();
94 if (ramvec == NULL)
95 panic("interrupt vector serup failed.");
96 else
97 printk(KERN_INFO "virtual vector at 0x%08lx\n",(unsigned long)ramvec);
98
99 /* create redirect table */
100 ramvec_p = ramvec;
101 trap_entry = h8300_trap_table;
102 saved_vector = h8300_saved_vectors;
103 for ( i = 0; i < NR_IRQS; i++) {
104 if (i == *saved_vector) {
105 ramvec_p++;
106 saved_vector++;
107 } else {
108 if ( i < NR_TRAPS ) {
109 if (*trap_entry)
110 *ramvec_p = VECTOR(*trap_entry);
111 ramvec_p++;
112 trap_entry++;
113 } else
114 *ramvec_p++ = REDIRECT(interrupt_entry);
115 }
116 }
117 interrupt_redirect_table = ramvec;
118#ifdef DUMP_VECTOR
119 ramvec_p = ramvec;
120 for (i = 0; i < NR_IRQS; i++) {
121 if ((i % 8) == 0)
122 printk(KERN_DEBUG "\n%p: ",ramvec_p);
123 printk(KERN_DEBUG "%p ",*ramvec_p);
124 ramvec_p++;
125 }
126 printk(KERN_DEBUG "\n");
127#endif
128#endif
129}
130
131int request_irq(unsigned int irq,
132 irqreturn_t (*handler)(int, void *, struct pt_regs *),
133 unsigned long flags, const char *devname, void *dev_id)
134{
135 irq_handler_t *irq_handle;
136 if (irq < 0 || irq >= NR_IRQS) {
137 printk(KERN_ERR "Incorrect IRQ %d from %s\n", irq, devname);
138 return -EINVAL;
139 }
140
141 if (irq_list[irq] || (h8300_enable_irq_pin(irq) == -EBUSY))
142 return -EBUSY;
143
144 if (use_kmalloc)
145 irq_handle = kmalloc(sizeof(irq_handler_t), GFP_ATOMIC);
146 else {
147 /* use bootmem allocater */
148 irq_handle = (irq_handler_t *)alloc_bootmem(sizeof(irq_handler_t));
149 irq_handle = (irq_handler_t *)((unsigned long)irq_handle | 0x80000000);
150 }
151
152 if (irq_handle == NULL)
153 return -ENOMEM;
154
155 irq_handle->handler = handler;
156 irq_handle->flags = flags;
157 irq_handle->count = 0;
158 irq_handle->dev_id = dev_id;
159 irq_handle->devname = devname;
160 irq_list[irq] = irq_handle;
161
162 if (irq_handle->flags & IRQF_SAMPLE_RANDOM)
163 rand_initialize_irq(irq);
164
165 enable_irq(irq);
166 return 0;
167}
168
169EXPORT_SYMBOL(request_irq);
170
171void free_irq(unsigned int irq, void *dev_id)
172{
173 if (irq >= NR_IRQS)
174 return;
175
176 if (!irq_list[irq] || irq_list[irq]->dev_id != dev_id)
177 printk(KERN_WARNING "Removing probably wrong IRQ %d from %s\n",
178 irq, irq_list[irq]->devname);
179 disable_irq(irq);
180 h8300_disable_irq_pin(irq);
181 if (((unsigned long)irq_list[irq] & 0x80000000) == 0) {
182 kfree(irq_list[irq]);
183 irq_list[irq] = NULL;
184 }
185}
186
187EXPORT_SYMBOL(free_irq);
188
189/*
190 * Do we need these probe functions on the m68k?
191 */
192unsigned long probe_irq_on (void)
193{
194 return 0;
195}
196
197EXPORT_SYMBOL(probe_irq_on);
198
199int probe_irq_off (unsigned long irqs)
200{
201 return 0;
202}
203
204EXPORT_SYMBOL(probe_irq_off);
205
206void enable_irq(unsigned int irq)
207{
208 if (irq >= EXT_IRQ0 && irq <= (EXT_IRQ0 + EXT_IRQS))
209 IER_REGS |= 1 << (irq - EXT_IRQ0);
210}
211
212void disable_irq(unsigned int irq)
213{
214 if (irq >= EXT_IRQ0 && irq <= (EXT_IRQ0 + EXT_IRQS))
215 IER_REGS &= ~(1 << (irq - EXT_IRQ0));
216}
217
218asmlinkage void process_int(int irq, struct pt_regs *fp)
219{
220 irq_enter();
221 h8300_clear_isr(irq);
222 if (irq >= NR_TRAPS && irq < NR_IRQS) {
223 if (irq_list[irq]) {
224 irq_list[irq]->handler(irq, irq_list[irq]->dev_id, fp);
225 irq_list[irq]->count++;
226 if (irq_list[irq]->flags & IRQF_SAMPLE_RANDOM)
227 add_interrupt_randomness(irq);
228 }
229 } else {
230 BUG();
231 }
232 irq_exit();
233}
234
235int show_interrupts(struct seq_file *p, void *v)
236{
237 int i = *(loff_t *) v;
238
239 if ((i < NR_IRQS) && (irq_list[i]!=NULL)) {
240 seq_printf(p, "%3d: %10u ",i,irq_list[i]->count);
241 seq_printf(p, "%s\n", irq_list[i]->devname);
242 }
243
244 return 0;
245}
246
247void init_irq_proc(void)
248{
249}
250
251static int __init enable_kmalloc(void)
252{
253 use_kmalloc = 1;
254 return 0;
255}
256core_initcall(enable_kmalloc);
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-07 12:31:44 -0500