1/* $NetBSD: vrip_spl.S,v 1.1 2011/03/16 13:23:41 tsutsui Exp $ */ 2 3/* 4 * Copyright (c) 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Digital Equipment Corporation and Ralph Campbell. 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 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * Copyright (C) 1989 Digital Equipment Corporation. 35 * Permission to use, copy, modify, and distribute this software and 36 * its documentation for any purpose and without fee is hereby granted, 37 * provided that the above copyright notice appears in all copies. 38 * Digital Equipment Corporation makes no representations about the 39 * suitability of this software for any purpose. It is provided "as is" 40 * without express or implied warranty. 41 * 42 * from: Header: /sprite/src/kernel/mach/ds3100.md/RCS/loMem.s, 43 * v 1.1 89/07/11 17:55:04 nelson Exp SPRITE (DECWRL) 44 * from: Header: /sprite/src/kernel/mach/ds3100.md/RCS/machAsm.s, 45 * v 9.2 90/01/29 18:00:39 shirriff Exp SPRITE (DECWRL) 46 * from: Header: /sprite/src/kernel/vm/ds3100.md/vmPmaxAsm.s, 47 * v 1.1 89/07/10 14:27:41 nelson Exp SPRITE (DECWRL) 48 * 49 * @(#)locore.s 8.5 (Berkeley) 1/4/94 50 */ 51 52#include <mips/asm.h> 53#include <mips/cpuregs.h> 54 55 .set noreorder 56 57#define VR_INT_MASK_PIU MIPS_INT_MASK_0 58 59/* 60 * void vrip_splpiu(void) 61 * disable all interrupts except PIU interrupt 62 */ 63LEAF_NOPROFILE(vrip_splpiu) 64 mfc0 v0, MIPS_COP_0_STATUS # fetch status register 65 li v1, ~MIPS_INT_MASK 66 and v1, v0, v1 # turn off INT bit 67 li v0, VR_INT_MASK_PIU 68 or v0, v0, v1 # enable only PIU interrupt 69 mtc0 v0, MIPS_COP_0_STATUS # store back 70 COP0_SYNC 71 j ra 72 nop 73END(vrip_splpiu) 74