1 /* $NetBSD: openpic.h,v 1.8 2012/02/01 02:03:51 matt Exp $ */
2
3 /*-
4 * Copyright (c) 2000 Tsubai Masanari. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29 #include <machine/pio.h>
30
31 #include <machine/openpicreg.h>
32
33 extern volatile unsigned char *openpic_base;
34
35 static __inline uint32_t openpic_read(u_int);
36 static __inline void openpic_write(u_int, uint32_t);
37 static __inline int openpic_read_irq(int);
38 static __inline void openpic_eoi(int);
39
40 static __inline uint32_t
openpic_read(u_int reg)41 openpic_read(u_int reg)
42 {
43 volatile uint8_t *addr = openpic_base + reg;
44
45 return in32rb(addr);
46 }
47
48 static __inline void
openpic_write(u_int reg,uint32_t val)49 openpic_write(u_int reg, uint32_t val)
50 {
51 volatile uint8_t *addr = openpic_base + reg;
52
53 out32rb(addr, val);
54 }
55
56 static __inline int
openpic_read_irq(int cpu)57 openpic_read_irq(int cpu)
58 {
59 return openpic_read(OPENPIC_IACK(cpu)) & OPENPIC_VECTOR_MASK;
60 }
61
62 static __inline void
openpic_eoi(int cpu)63 openpic_eoi(int cpu)
64 {
65 openpic_write(OPENPIC_EOI(cpu), 0);
66 openpic_read(OPENPIC_EOI(cpu));
67 }
68