1 /* $NetBSD: pic_bebox.c,v 1.12 2020/11/18 03:46:25 thorpej Exp $ */
2
3 /*-
4 * Copyright (c) 2007 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Tim Rightnour
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 #include <sys/cdefs.h>
33 __KERNEL_RCSID(0, "$NetBSD: pic_bebox.c,v 1.12 2020/11/18 03:46:25 thorpej Exp $");
34
35 #include "opt_multiprocessor.h"
36
37 #include <sys/param.h>
38 #include <sys/kmem.h>
39 #include <sys/kernel.h>
40
41 #include <uvm/uvm_extern.h>
42
43 #include <machine/bebox.h>
44 #include <machine/pio.h>
45
46 #include <arch/powerpc/pic/picvar.h>
47
48
49 static void bebox_enable_irq(struct pic_ops *, int, int);
50 static void bebox_disable_irq(struct pic_ops *, int);
51 static int bebox_get_irq(struct pic_ops *, int);
52 static void bebox_ack_irq(struct pic_ops *, int);
53 struct pic_ops * setup_bebox_intr(void);
54
55 struct pic_ops *
setup_bebox_intr(void)56 setup_bebox_intr(void)
57 {
58 struct pic_ops *pic;
59
60 pic = kmem_alloc(sizeof(struct pic_ops), KM_SLEEP);
61 pic->pic_numintrs = 32;
62 pic->pic_cookie = (void *)BEBOX_REG;
63 pic->pic_enable_irq = bebox_enable_irq;
64 pic->pic_reenable_irq = bebox_enable_irq;
65 pic->pic_disable_irq = bebox_disable_irq;
66 pic->pic_get_irq = bebox_get_irq;
67 pic->pic_ack_irq = bebox_ack_irq;
68 pic->pic_establish_irq = dummy_pic_establish_intr;
69 strcpy(pic->pic_name, "bebox");
70 pic_add(pic);
71
72 #ifdef MULTIPROCESSOR
73 setup_bebox_ipi();
74 #endif
75
76 return(pic);
77 }
78
79 static void
bebox_enable_irq(struct pic_ops * pic,int irq,int type)80 bebox_enable_irq(struct pic_ops *pic, int irq, int type)
81 {
82
83 SET_BEBOX_REG(CPU0_INT_MASK, 1 << (31 - irq));
84 }
85
86 static void
bebox_disable_irq(struct pic_ops * pic,int irq)87 bebox_disable_irq(struct pic_ops *pic, int irq)
88 {
89
90 CLEAR_BEBOX_REG(CPU0_INT_MASK, 1 << (31 - irq));
91 }
92
93 static int
bebox_get_irq(struct pic_ops * pic,int mode)94 bebox_get_irq(struct pic_ops *pic, int mode)
95 {
96 unsigned int state;
97
98 state = READ_BEBOX_REG(INT_SOURCE);
99 state &= BEBOX_INTR_MASK;
100 state &= READ_BEBOX_REG(CPU0_INT_MASK);
101 if (state == 0)
102 return 255;
103 return __builtin_clz(state);
104 }
105
106 static void
bebox_ack_irq(struct pic_ops * pic,int irq)107 bebox_ack_irq(struct pic_ops *pic, int irq)
108 {
109 /* do nothing */
110 }
111