124 lines
4.3 KiB
C
124 lines
4.3 KiB
C
/* $NetBSD: psl.h,v 1.9 2001/08/05 04:40:03 matt Exp $ */
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/*
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* Copyright (c) 1982, 1986, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)psl.h 8.1 (Berkeley) 6/10/93
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*/
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#ifndef PSL_C
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/*
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* MC68000 program status word
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*/
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#define PSL_C 0x0001 /* carry bit */
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#define PSL_V 0x0002 /* overflow bit */
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#define PSL_Z 0x0004 /* zero bit */
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#define PSL_N 0x0008 /* negative bit */
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#define PSL_X 0x0010 /* extend bit */
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#define PSL_ALLCC 0x001F /* all cc bits - unlikely */
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#define PSL_IPL0 0x0000 /* interrupt priority level 0 */
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#define PSL_IPL1 0x0100 /* interrupt priority level 1 */
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#define PSL_IPL2 0x0200 /* interrupt priority level 2 */
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#define PSL_IPL3 0x0300 /* interrupt priority level 3 */
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#define PSL_IPL4 0x0400 /* interrupt priority level 4 */
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#define PSL_IPL5 0x0500 /* interrupt priority level 5 */
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#define PSL_IPL6 0x0600 /* interrupt priority level 6 */
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#define PSL_IPL7 0x0700 /* interrupt priority level 7 */
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#define PSL_M 0x1000 /* master (kernel) sp vs intr sp */
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#define PSL_S 0x2000 /* supervisor enable bit */
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/* PSL_T0 0x4000 ??? T0 on 68020, 8000 is T1 */
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#define PSL_T 0x8000 /* trace enable bit */
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#define PSL_LOWIPL (PSL_S)
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#define PSL_HIGHIPL (PSL_S | PSL_IPL7)
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#define PSL_IPL (PSL_IPL7)
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#define PSL_USER (0)
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#define PSL_MBZ 0xFFFF58E0 /* must be zero bits */
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#define PSL_USERSET (0)
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#define PSL_USERCLR (PSL_S | PSL_IPL7 | PSL_MBZ)
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#define USERMODE(ps) (((ps) & PSL_S) == 0)
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#if defined(_KERNEL) && !defined(_LOCORE)
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/*
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* spl functions; platform-specific code must define spl0 and splx().
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*/
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static __inline int
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_spl(int s)
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{
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int sr;
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__asm __volatile ("movew %%sr,%0; movew %1,%%sr" :
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"=&d" (sr) : "di" (s));
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return sr;
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}
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static __inline int
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_splraise(int level)
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{
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int sr;
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__asm __volatile("movw %%sr,%0" : "=d" (sr));
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if ((u_int16_t)level >= PSL_HIGHIPL || (u_int16_t)level > (u_int16_t)sr)
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__asm __volatile("movw %0,%%sr" :: "di" (level));
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return sr;
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}
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/* spl0 may require checking for software interrupts */
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#define _spl0() _spl(PSL_S|PSL_IPL0)
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#define spl1() _spl(PSL_S|PSL_IPL1)
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#define spl2() _spl(PSL_S|PSL_IPL2)
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#define spl3() _spl(PSL_S|PSL_IPL3)
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#define spl4() _spl(PSL_S|PSL_IPL4)
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#define spl5() _spl(PSL_S|PSL_IPL5)
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#define spl6() _spl(PSL_S|PSL_IPL6)
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#define spl7() _spl(PSL_S|PSL_IPL7)
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#define splraise1() _splraise(PSL_S|PSL_IPL1)
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#define splraise2() _splraise(PSL_S|PSL_IPL2)
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#define splraise3() _splraise(PSL_S|PSL_IPL3)
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#define splraise4() _splraise(PSL_S|PSL_IPL4)
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#define splraise5() _splraise(PSL_S|PSL_IPL5)
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#define splraise6() _splraise(PSL_S|PSL_IPL6)
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#define splraise7() _splraise(PSL_S|PSL_IPL7)
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#endif /* _KERNEL && ! _LOCORE */
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#endif
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