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/* $OpenBSD: psl.h,v 1.7 2007/11/09 17:28:29 miod Exp $ */
/* $NetBSD: psl.h,v 1.5 1994/10/26 07:50:50 cgd 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 _M68K_PSL_H_
#define _M68K_PSL_H_
/*
* MC680x0 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)
#ifdef _KERNEL
/* SPL asserts */
#ifdef DIAGNOSTIC
/*
* Although this function is implemented in MI code, it must be in this MD
* header because we don't want this header to include MI includes.
*/
void splassert_fail(int, int, const char *);
extern int splassert_ctl;
void splassert_check(int, const char *);
#define splassert(__wantipl) \
do { \
if (splassert_ctl > 0) { \
splassert_check(__wantipl, __func__); \
} \
} while (0)
#else
#define splassert(wantipl) do { /* nothing */ } while (0)
#endif
/*
* Convert PSL values to CPU IPLs and vice-versa.
*/
#define PSLTOIPL(x) (((x) >> 8) & 0x7)
#define IPLTOPSL(x) ((((x) & 0x7) << 8) | PSL_S)
/*
* spl functions; all but spl0 are done in-line
*/
#define _spl(s) \
({ \
register int _spl_r; \
\
__asm __volatile ("clrl %0; movew sr,%0; movew %1,sr" : \
"=&d" (_spl_r) : "di" (s)); \
_spl_r; \
})
#define _splraise(s) \
({ \
register int _spl_r; \
\
__asm __volatile (" \
clrl d0 ; \
movw sr,d0 ; \
movl d0,%0 ; \
andw #0x700,d0 ; \
movw %1,d1 ; \
andw #0x700,d1 ; \
cmpw d0,d1 ; \
jle 1f ; \
movw %1,sr ; \
1:" : \
"=&d" (_spl_r) : \
"di" (s) : \
"d0", "d1"); \
_spl_r; \
})
#endif /* _KERNEL */
#endif /* _M68K_PSL_H_ */
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