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/* $NetBSD: psl.h,v 1.15 2012/07/27 05:36:11 matt Exp $ */
/*
* Copyright (c) 1982, 1986, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)psl.h 8.1 (Berkeley) 6/10/93
*/
#ifndef PSL_C
/*
* MC68000 program status word
*/
#define PSL_C 0x0001 /* carry bit */
#define PSL_V 0x0002 /* overflow bit */
#define PSL_Z 0x0004 /* zero bit */
#define PSL_N 0x0008 /* negative bit */
#define PSL_X 0x0010 /* extend bit */
#define PSL_ALLCC 0x001F /* all cc bits - unlikely */
#define PSL_IPL0 0x0000 /* interrupt priority level 0 */
#define PSL_IPL1 0x0100 /* interrupt priority level 1 */
#define PSL_IPL2 0x0200 /* interrupt priority level 2 */
#define PSL_IPL3 0x0300 /* interrupt priority level 3 */
#define PSL_IPL4 0x0400 /* interrupt priority level 4 */
#define PSL_IPL5 0x0500 /* interrupt priority level 5 */
#define PSL_IPL6 0x0600 /* interrupt priority level 6 */
#define PSL_IPL7 0x0700 /* interrupt priority level 7 */
#define PSL_M 0x1000 /* master (kernel) sp vs intr sp */
#define PSL_S 0x2000 /* supervisor enable bit */
/* PSL_T0 0x4000 ??? T0 on 68020, 8000 is T1 */
#define PSL_T 0x8000 /* trace enable bit */
#define PSL_LOWIPL (PSL_S)
#define PSL_HIGHIPL (PSL_S | PSL_IPL7)
#define PSL_IPL (PSL_IPL7)
#define PSL_USER (0)
#define PSL_MBZ 0xFFFF58E0 /* must be zero bits */
#define PSL_USERSET (0)
#define PSL_USERCLR (PSL_S | PSL_IPL7 | PSL_MBZ)
#define USERMODE(ps) (((ps) & PSL_S) == 0)
#if defined(_KERNEL) && !defined(_LOCORE)
#define IPL_SAFEPRI PSL_LOWIPL /* for kern_sleepq.c */
/*
* spl functions; platform-specific code must define spl0 and splx().
*/
static __inline int
_spl(int s)
{
int sr;
__asm volatile ("movew %%sr,%0; movew %1,%%sr" :
"=&d" (sr) : "di" (s) : "memory");
return sr;
}
static __inline int
_splraise(int level)
{
int sr;
__asm volatile("movw %%sr,%0" : "=d" (sr));
if ((u_int16_t)level >= PSL_HIGHIPL || (u_int16_t)level > (u_int16_t)sr)
__asm volatile("movw %0,%%sr" :: "di" (level) : "memory");
return sr;
}
/* spl0 may require checking for software interrupts */
#define _spl0() _spl(PSL_S|PSL_IPL0)
#define spl1() _spl(PSL_S|PSL_IPL1)
#define spl2() _spl(PSL_S|PSL_IPL2)
#define spl3() _spl(PSL_S|PSL_IPL3)
#define spl4() _spl(PSL_S|PSL_IPL4)
#define spl5() _spl(PSL_S|PSL_IPL5)
#define spl6() _spl(PSL_S|PSL_IPL6)
#define spl7() _spl(PSL_S|PSL_IPL7)
#define splraise1() _splraise(PSL_S|PSL_IPL1)
#define splraise2() _splraise(PSL_S|PSL_IPL2)
#define splraise3() _splraise(PSL_S|PSL_IPL3)
#define splraise4() _splraise(PSL_S|PSL_IPL4)
#define splraise5() _splraise(PSL_S|PSL_IPL5)
#define splraise6() _splraise(PSL_S|PSL_IPL6)
#define splraise7() _splraise(PSL_S|PSL_IPL7)
#endif /* _KERNEL && ! _LOCORE */
#endif
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