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-rw-r--r--arch/s390/kernel/s390_ext.c142
1 files changed, 0 insertions, 142 deletions
diff --git a/arch/s390/kernel/s390_ext.c b/arch/s390/kernel/s390_ext.c
deleted file mode 100644
index 9ce641b5291f..000000000000
--- a/arch/s390/kernel/s390_ext.c
+++ /dev/null
@@ -1,142 +0,0 @@
1/*
2 * arch/s390/kernel/s390_ext.c
3 *
4 * S390 version
5 * Copyright (C) 1999,2000 IBM Deutschland Entwicklung GmbH, IBM Corporation
6 * Author(s): Holger Smolinski (Holger.Smolinski@de.ibm.com),
7 * Martin Schwidefsky (schwidefsky@de.ibm.com)
8 */
9
10#include <linux/module.h>
11#include <linux/kernel.h>
12#include <linux/slab.h>
13#include <linux/ftrace.h>
14#include <linux/errno.h>
15#include <linux/kernel_stat.h>
16#include <linux/interrupt.h>
17#include <asm/cputime.h>
18#include <asm/lowcore.h>
19#include <asm/s390_ext.h>
20#include <asm/irq_regs.h>
21#include <asm/irq.h>
22#include "entry.h"
23
24/*
25 * ext_int_hash[index] is the start of the list for all external interrupts
26 * that hash to this index. With the current set of external interrupts
27 * (0x1202 external call, 0x1004 cpu timer, 0x2401 hwc console, 0x4000
28 * iucv and 0x2603 pfault) this is always the first element.
29 */
30ext_int_info_t *ext_int_hash[256] = { NULL, };
31
32static inline int ext_hash(__u16 code)
33{
34 return (code + (code >> 9)) & 0xff;
35}
36
37int register_external_interrupt(__u16 code, ext_int_handler_t handler)
38{
39 ext_int_info_t *p;
40 int index;
41
42 p = kmalloc(sizeof(ext_int_info_t), GFP_ATOMIC);
43 if (p == NULL)
44 return -ENOMEM;
45 p->code = code;
46 p->handler = handler;
47 index = ext_hash(code);
48 p->next = ext_int_hash[index];
49 ext_int_hash[index] = p;
50 return 0;
51}
52
53int register_early_external_interrupt(__u16 code, ext_int_handler_t handler,
54 ext_int_info_t *p)
55{
56 int index;
57
58 if (p == NULL)
59 return -EINVAL;
60 p->code = code;
61 p->handler = handler;
62 index = ext_hash(code);
63 p->next = ext_int_hash[index];
64 ext_int_hash[index] = p;
65 return 0;
66}
67
68int unregister_external_interrupt(__u16 code, ext_int_handler_t handler)
69{
70 ext_int_info_t *p, *q;
71 int index;
72
73 index = ext_hash(code);
74 q = NULL;
75 p = ext_int_hash[index];
76 while (p != NULL) {
77 if (p->code == code && p->handler == handler)
78 break;
79 q = p;
80 p = p->next;
81 }
82 if (p == NULL)
83 return -ENOENT;
84 if (q != NULL)
85 q->next = p->next;
86 else
87 ext_int_hash[index] = p->next;
88 kfree(p);
89 return 0;
90}
91
92int unregister_early_external_interrupt(__u16 code, ext_int_handler_t handler,
93 ext_int_info_t *p)
94{
95 ext_int_info_t *q;
96 int index;
97
98 if (p == NULL || p->code != code || p->handler != handler)
99 return -EINVAL;
100 index = ext_hash(code);
101 q = ext_int_hash[index];
102 if (p != q) {
103 while (q != NULL) {
104 if (q->next == p)
105 break;
106 q = q->next;
107 }
108 if (q == NULL)
109 return -ENOENT;
110 q->next = p->next;
111 } else
112 ext_int_hash[index] = p->next;
113 return 0;
114}
115
116void __irq_entry do_extint(struct pt_regs *regs, unsigned short code)
117{
118 ext_int_info_t *p;
119 int index;
120 struct pt_regs *old_regs;
121
122 old_regs = set_irq_regs(regs);
123 s390_idle_check(regs, S390_lowcore.int_clock,
124 S390_lowcore.async_enter_timer);
125 irq_enter();
126 if (S390_lowcore.int_clock >= S390_lowcore.clock_comparator)
127 /* Serve timer interrupts first. */
128 clock_comparator_work();
129 kstat_cpu(smp_processor_id()).irqs[EXTERNAL_INTERRUPT]++;
130 if (code != 0x1004)
131 __get_cpu_var(s390_idle).nohz_delay = 1;
132 index = ext_hash(code);
133 for (p = ext_int_hash[index]; p; p = p->next) {
134 if (likely(p->code == code))
135 p->handler(code);
136 }
137 irq_exit();
138 set_irq_regs(old_regs);
139}
140
141EXPORT_SYMBOL(register_external_interrupt);
142EXPORT_SYMBOL(unregister_external_interrupt);
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