1 /* $NetBSD: openpic.h,v 1.7 2009/03/14 14:46:05 dsl 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 u_int openpic_read(int); 36 static __inline void openpic_write(int, u_int); 37 static __inline int openpic_read_irq(int); 38 static __inline void openpic_eoi(int); 39 40 static __inline u_int 41 openpic_read(reg) 42 int reg; 43 { 44 volatile unsigned char *addr = openpic_base + reg; 45 46 return in32rb(addr); 47 } 48 49 static __inline void 50 openpic_write(reg, val) 51 int reg; 52 u_int val; 53 { 54 volatile unsigned char *addr = openpic_base + reg; 55 56 out32rb(addr, val); 57 } 58 59 static __inline int 60 openpic_read_irq(cpu) 61 int cpu; 62 { 63 return openpic_read(OPENPIC_IACK(cpu)) & OPENPIC_VECTOR_MASK; 64 } 65 66 static __inline void 67 openpic_eoi(cpu) 68 int cpu; 69 { 70 openpic_write(OPENPIC_EOI(cpu), 0); 71 openpic_read(OPENPIC_EOI(cpu)); 72 } 73