1 /* $NetBSD: intreg.c,v 1.30 2013/09/07 15:56:11 tsutsui Exp $ */
2
3 /*-
4 * Copyright (c) 1996 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Adam Glass and Gordon W. Ross.
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 /*
33 * This handles multiple attach of autovectored interrupts,
34 * and the handy software interrupt request register.
35 */
36
37 #include <sys/cdefs.h>
38 __KERNEL_RCSID(0, "$NetBSD: intreg.c,v 1.30 2013/09/07 15:56:11 tsutsui Exp $");
39
40 #include <sys/param.h>
41 #include <sys/systm.h>
42 #include <sys/device.h>
43 #include <sys/vmmeter.h>
44
45 #include <uvm/uvm_extern.h>
46
47 #include <m68k/asm_single.h>
48
49 #include <machine/autoconf.h>
50 #include <machine/cpu.h>
51 #include <machine/mon.h>
52
53 #include <sun3/sun3/interreg.h>
54 #include <sun3/sun3/machdep.h>
55
56 struct intreg_softc {
57 device_t sc_dev;
58 volatile uint8_t *sc_reg;
59 };
60
61 static int intreg_match(device_t, cfdata_t, void *);
62 static void intreg_attach(device_t, device_t, void *);
63
64 CFATTACH_DECL_NEW(intreg, sizeof(struct intreg_softc),
65 intreg_match, intreg_attach, NULL, NULL);
66
67 volatile uint8_t *interrupt_reg;
68 static int intreg_attached;
69
70 /* called early (by internal_configure) */
71 void
intreg_init(void)72 intreg_init(void)
73 {
74 vaddr_t va;
75
76 if (find_prom_map(IREG_ADDR, PMAP_OBIO, 1, &va) != 0) {
77 mon_printf("intreg_init\n");
78 sunmon_abort();
79 }
80 interrupt_reg = (void *)va;
81
82 /* Turn off all interrupts until clock_attach */
83 *interrupt_reg = 0;
84 }
85
86
87 static int
intreg_match(device_t parent,cfdata_t cf,void * args)88 intreg_match(device_t parent, cfdata_t cf, void *args)
89 {
90 struct confargs *ca = args;
91
92 /* This driver only supports one instance. */
93 if (intreg_attached)
94 return 0;
95
96 /* Validate the given address. */
97 if (ca->ca_paddr != IREG_ADDR)
98 return 0;
99
100 return 1;
101 }
102
103
104 static void
intreg_attach(device_t parent,device_t self,void * args)105 intreg_attach(device_t parent, device_t self, void *args)
106 {
107 struct intreg_softc *sc = device_private(self);
108
109 sc->sc_dev = self;
110 aprint_normal("\n");
111
112 sc->sc_reg = interrupt_reg;
113
114 intreg_attached = 1;
115 }
116
117
118 #if 0
119 void
120 isr_soft_request(int level)
121 {
122 uint8_t bit;
123
124 if ((level < _IPL_SOFT_LEVEL_MIN) || (level > _IPL_SOFT_LEVEL_MAX))
125 return;
126
127 bit = 1 << level;
128 single_inst_bset_b(*interrupt_reg, bit);
129 }
130
131 void
132 isr_soft_clear(int level)
133 {
134 uint8_t bit;
135
136 if ((level < _IPL_SOFT_LEVEL_MIN) || (level > _IPL_SOFT_LEVEL_MAX))
137 return;
138
139 bit = 1 << level;
140 single_inst_bclr_b(*interrupt_reg, bit);
141 }
142 #endif
143