1 /* $NetBSD: s3c2xx0_intr.c,v 1.19 2022/09/27 06:36:43 skrll Exp $ */
2
3 /*
4 * Copyright (c) 2002, 2003 Fujitsu Component Limited
5 * Copyright (c) 2002, 2003 Genetec Corporation
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of The Fujitsu Component Limited nor the name of
17 * Genetec corporation may not be used to endorse or promote products
18 * derived from this software without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY FUJITSU COMPONENT LIMITED AND GENETEC
21 * CORPORATION ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
22 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
23 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
24 * DISCLAIMED. IN NO EVENT SHALL FUJITSU COMPONENT LIMITED OR GENETEC
25 * CORPORATION BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
27 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
28 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
29 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34
35 /*
36 * Common part of IRQ handlers for Samsung S3C2800/2400/2410 processors.
37 * derived from i80321_icu.c
38 */
39
40 /*
41 * Copyright (c) 2001, 2002 Wasabi Systems, Inc.
42 * All rights reserved.
43 *
44 * Written by Jason R. Thorpe for Wasabi Systems, Inc.
45 *
46 * Redistribution and use in source and binary forms, with or without
47 * modification, are permitted provided that the following conditions
48 * are met:
49 * 1. Redistributions of source code must retain the above copyright
50 * notice, this list of conditions and the following disclaimer.
51 * 2. Redistributions in binary form must reproduce the above copyright
52 * notice, this list of conditions and the following disclaimer in the
53 * documentation and/or other materials provided with the distribution.
54 * 3. All advertising materials mentioning features or use of this software
55 * must display the following acknowledgement:
56 * This product includes software developed for the NetBSD Project by
57 * Wasabi Systems, Inc.
58 * 4. The name of Wasabi Systems, Inc. may not be used to endorse
59 * or promote products derived from this software without specific prior
60 * written permission.
61 *
62 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
63 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
64 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
65 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
66 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
67 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
68 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
69 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
70 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
71 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
72 * POSSIBILITY OF SUCH DAMAGE.
73 */
74
75 #include <sys/cdefs.h>
76 __KERNEL_RCSID(0, "$NetBSD: s3c2xx0_intr.c,v 1.19 2022/09/27 06:36:43 skrll Exp $");
77
78 #include <sys/param.h>
79 #include <sys/systm.h>
80
81 #include <sys/bus.h>
82 #include <machine/intr.h>
83
84 #include <arm/cpufunc.h>
85
86 #include <arm/s3c2xx0/s3c2xx0reg.h>
87 #include <arm/s3c2xx0/s3c2xx0var.h>
88
89 volatile uint32_t *s3c2xx0_intr_mask_reg;
90
91 /*
92 * modify interrupt mask table for SPL levels
93 */
94 void
s3c2xx0_update_intr_masks(int irqno,int level)95 s3c2xx0_update_intr_masks(int irqno, int level)
96 {
97 int mask = 1 << irqno;
98 int i;
99
100
101 s3c2xx0_ilevel[irqno] = level;
102
103 for (i = 0; i < level; ++i)
104 s3c2xx0_imask[i] |= mask; /* Enable interrupt at lower
105 * level */
106 for (; i < NIPL - 1; ++i)
107 s3c2xx0_imask[i] &= ~mask; /* Disable interrupt at upper
108 * level */
109
110 /*
111 * Enforce a hierarchy that gives "slow" device (or devices with
112 * limited input buffer space/"real-time" requirements) a better
113 * chance at not dropping data.
114 */
115 s3c2xx0_imask[IPL_VM] &= s3c2xx0_imask[IPL_SOFTSERIAL];
116 s3c2xx0_imask[IPL_CLOCK] &= s3c2xx0_imask[IPL_VM];
117 s3c2xx0_imask[IPL_HIGH] &= s3c2xx0_imask[IPL_CLOCK];
118 }
119
120 static int
stray_interrupt(void * cookie)121 stray_interrupt(void *cookie)
122 {
123 int save;
124 int irqno = (int) cookie;
125 printf("stray interrupt %d\n", irqno);
126
127 save = disable_interrupts(I32_bit);
128 *s3c2xx0_intr_mask_reg &= ~(1U << irqno);
129 restore_interrupts(save);
130
131 return 0;
132 }
133 /*
134 * Initialize interrupt dispatcher.
135 */
136 void
s3c2xx0_intr_init(struct s3c2xx0_intr_dispatch * dispatch_table,int icu_len)137 s3c2xx0_intr_init(struct s3c2xx0_intr_dispatch * dispatch_table, int icu_len)
138 {
139 int i;
140
141 for (i = 0; i < icu_len; ++i) {
142 dispatch_table[i].func = stray_interrupt;
143 dispatch_table[i].cookie = (void *) (i);
144 dispatch_table[i].level = IPL_VM;
145 snprintf(dispatch_table[i].name,
146 sizeof(dispatch_table[i].name), "irq %d", i);
147 evcnt_attach_dynamic(&dispatch_table[i].ev, EVCNT_TYPE_INTR,
148 NULL, "s3c2xx0", dispatch_table[i].name);
149 }
150
151 global_intr_mask = ~0; /* no intr is globally blocked. */
152
153 _splraise(IPL_VM);
154 enable_interrupts(I32_bit);
155 }
156
157 /*
158 * initialize variables so that splfoo() doesn't touch illegal address.
159 * called during bootstrap.
160 */
161 void
s3c2xx0_intr_bootstrap(vaddr_t icureg)162 s3c2xx0_intr_bootstrap(vaddr_t icureg)
163 {
164 s3c2xx0_intr_mask_reg = (volatile uint32_t *)(icureg + INTCTL_INTMSK);
165 }
166
167
168
169 #undef splx
170 void
splx(int ipl)171 splx(int ipl)
172 {
173 s3c2xx0_splx(ipl);
174 }
175
176 #undef _splraise
177 int
_splraise(int ipl)178 _splraise(int ipl)
179 {
180 return s3c2xx0_splraise(ipl);
181 }
182
183 #undef _spllower
184 int
_spllower(int ipl)185 _spllower(int ipl)
186 {
187 return s3c2xx0_spllower(ipl);
188 }
189