1/* $NetBSD: pci_eb164_intr.s,v 1.6 2002/01/23 21:33:19 ross Exp $ */ 2 3/* 4 * Copyright (c) 1996 Carnegie-Mellon University. 5 * All rights reserved. 6 * 7 * Author: Chris G. Demetriou 8 * 9 * Permission to use, copy, modify and distribute this software and 10 * its documentation is hereby granted, provided that both the copyright 11 * notice and this permission notice appear in all copies of the 12 * software, derivative works or modified versions, and any portions 13 * thereof, and that both notices appear in supporting documentation. 14 * 15 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 16 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 17 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 18 * 19 * Carnegie Mellon requests users of this software to return to 20 * 21 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 22 * School of Computer Science 23 * Carnegie Mellon University 24 * Pittsburgh PA 15213-3890 25 * 26 * any improvements or extensions that they make and grant Carnegie the 27 * rights to redistribute these changes. 28 */ 29 30/* 31 * The description of how to enable and disable interrupts in the 32 * AlphaPC 164 motherboard technical reference manual is incorrect, 33 * at least for the OSF/1 PALcode. 34 * 35 * These functions were written by disassembling a Digital UNIX kernel's 36 * eb164_intrdsabl and eb164_intrenabl functions (because they had 37 * interesting names), and then playing with them to see how to call 38 * them correctly. 39 * 40 * It looks like the right thing to do is to call them with the interrupt 41 * request that you want to enable or disable (presumably in the range 42 * 0 -> 23, since there are 3 8-bit interrupt-enable bits in the 43 * interrupt mask PLD). 44 */ 45 46#include <machine/asm.h> 47 48__KERNEL_RCSID(0, "$NetBSD: pci_eb164_intr.s,v 1.6 2002/01/23 21:33:19 ross Exp $"); 49 50 .text 51LEAF(eb164_intr_enable,1) 52 mov a0, a1 53 ldiq a0, 0x34 54 call_pal PAL_cserve 55 RET 56 END(eb164_intr_enable) 57 58 .text 59LEAF(eb164_intr_disable,1) 60 mov a0, a1 61 ldiq a0, 0x35 62 call_pal PAL_cserve 63 RET 64 END(eb164_intr_disable) 65