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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/m68k/bvme6000/bvmeints.c
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'arch/m68k/bvme6000/bvmeints.c')
-rw-r--r--arch/m68k/bvme6000/bvmeints.c160
1 files changed, 160 insertions, 0 deletions
diff --git a/arch/m68k/bvme6000/bvmeints.c b/arch/m68k/bvme6000/bvmeints.c
new file mode 100644
index 000000000000..298a8df02664
--- /dev/null
+++ b/arch/m68k/bvme6000/bvmeints.c
@@ -0,0 +1,160 @@
1/*
2 * arch/m68k/bvme6000/bvmeints.c
3 *
4 * Copyright (C) 1997 Richard Hirst [richard@sleepie.demon.co.uk]
5 *
6 * based on amiints.c -- Amiga Linux interrupt handling code
7 *
8 * This file is subject to the terms and conditions of the GNU General Public
9 * License. See the file README.legal in the main directory of this archive
10 * for more details.
11 *
12 */
13
14#include <linux/types.h>
15#include <linux/kernel.h>
16#include <linux/errno.h>
17#include <linux/seq_file.h>
18
19#include <asm/ptrace.h>
20#include <asm/system.h>
21#include <asm/irq.h>
22#include <asm/traps.h>
23
24static irqreturn_t bvme6000_defhand (int irq, void *dev_id, struct pt_regs *fp);
25
26/*
27 * This should ideally be 4 elements only, for speed.
28 */
29
30static struct {
31 irqreturn_t (*handler)(int, void *, struct pt_regs *);
32 unsigned long flags;
33 void *dev_id;
34 const char *devname;
35 unsigned count;
36} irq_tab[256];
37
38/*
39 * void bvme6000_init_IRQ (void)
40 *
41 * Parameters: None
42 *
43 * Returns: Nothing
44 *
45 * This function is called during kernel startup to initialize
46 * the bvme6000 IRQ handling routines.
47 */
48
49void bvme6000_init_IRQ (void)
50{
51 int i;
52
53 for (i = 0; i < 256; i++) {
54 irq_tab[i].handler = bvme6000_defhand;
55 irq_tab[i].flags = IRQ_FLG_STD;
56 irq_tab[i].dev_id = NULL;
57 irq_tab[i].devname = NULL;
58 irq_tab[i].count = 0;
59 }
60}
61
62int bvme6000_request_irq(unsigned int irq,
63 irqreturn_t (*handler)(int, void *, struct pt_regs *),
64 unsigned long flags, const char *devname, void *dev_id)
65{
66 if (irq > 255) {
67 printk("%s: Incorrect IRQ %d from %s\n", __FUNCTION__, irq, devname);
68 return -ENXIO;
69 }
70#if 0
71 /* Nothing special about auto-vectored devices for the BVME6000,
72 * but treat it specially to avoid changes elsewhere.
73 */
74
75 if (irq >= VEC_INT1 && irq <= VEC_INT7)
76 return cpu_request_irq(irq - VEC_SPUR, handler, flags,
77 devname, dev_id);
78#endif
79 if (!(irq_tab[irq].flags & IRQ_FLG_STD)) {
80 if (irq_tab[irq].flags & IRQ_FLG_LOCK) {
81 printk("%s: IRQ %d from %s is not replaceable\n",
82 __FUNCTION__, irq, irq_tab[irq].devname);
83 return -EBUSY;
84 }
85 if (flags & IRQ_FLG_REPLACE) {
86 printk("%s: %s can't replace IRQ %d from %s\n",
87 __FUNCTION__, devname, irq, irq_tab[irq].devname);
88 return -EBUSY;
89 }
90 }
91 irq_tab[irq].handler = handler;
92 irq_tab[irq].flags = flags;
93 irq_tab[irq].dev_id = dev_id;
94 irq_tab[irq].devname = devname;
95 return 0;
96}
97
98void bvme6000_free_irq(unsigned int irq, void *dev_id)
99{
100 if (irq > 255) {
101 printk("%s: Incorrect IRQ %d\n", __FUNCTION__, irq);
102 return;
103 }
104#if 0
105 if (irq >= VEC_INT1 && irq <= VEC_INT7) {
106 cpu_free_irq(irq - VEC_SPUR, dev_id);
107 return;
108 }
109#endif
110 if (irq_tab[irq].dev_id != dev_id)
111 printk("%s: Removing probably wrong IRQ %d from %s\n",
112 __FUNCTION__, irq, irq_tab[irq].devname);
113
114 irq_tab[irq].handler = bvme6000_defhand;
115 irq_tab[irq].flags = IRQ_FLG_STD;
116 irq_tab[irq].dev_id = NULL;
117 irq_tab[irq].devname = NULL;
118}
119
120irqreturn_t bvme6000_process_int (unsigned long vec, struct pt_regs *fp)
121{
122 if (vec > 255) {
123 printk ("bvme6000_process_int: Illegal vector %ld", vec);
124 return IRQ_NONE;
125 } else {
126 irq_tab[vec].count++;
127 irq_tab[vec].handler(vec, irq_tab[vec].dev_id, fp);
128 return IRQ_HANDLED;
129 }
130}
131
132int show_bvme6000_interrupts(struct seq_file *p, void *v)
133{
134 int i;
135
136 for (i = 0; i < 256; i++) {
137 if (irq_tab[i].count)
138 seq_printf(p, "Vec 0x%02x: %8d %s\n",
139 i, irq_tab[i].count,
140 irq_tab[i].devname ? irq_tab[i].devname : "free");
141 }
142 return 0;
143}
144
145
146static irqreturn_t bvme6000_defhand (int irq, void *dev_id, struct pt_regs *fp)
147{
148 printk ("Unknown interrupt 0x%02x\n", irq);
149 return IRQ_NONE;
150}
151
152void bvme6000_enable_irq (unsigned int irq)
153{
154}
155
156
157void bvme6000_disable_irq (unsigned int irq)
158{
159}
160