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      1 /*	$NetBSD: psl.h,v 1.19 2016/07/30 06:27:45 matt 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  * 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  *	@(#)psl.h	8.1 (Berkeley) 6/10/93
     35  */
     36 
     37 /*
     38  * Define PSL_LOWIPL, PSL_USERSET, USERMODE for MI code, for
     39  * MIPS1, MIPS3+, or both, depending on the configured CPU types.
     40  */
     41 
     42 #include <machine/cdefs.h>	/* for API selection */
     43 #include <mips/cpuregs.h>
     44 
     45 /*
     46  * mips3 (or greater)-specific  definitions
     47  */
     48 #define	MIPS3_PSL_LOWIPL	(MIPS3_INT_MASK | MIPS_SR_INT_IE)
     49 
     50 #if !defined(__mips_o32)
     51 # define MIPS3_PSL_XFLAGS	(MIPS3_SR_XX | MIPS_SR_KX)
     52 #else
     53 # define MIPS3_PSL_XFLAGS	(0)
     54 #endif
     55 
     56 #define	MIPS3_PSL_USERSET 	\
     57 	(MIPS3_SR_KSU_USER |	\
     58 	 MIPS3_PSL_XFLAGS |	\
     59 	 MIPS_SR_INT_IE |	\
     60 	 MIPS3_SR_EXL |		\
     61 	 MIPS3_INT_MASK)
     62 
     63 #define	MIPS3_USERMODE(ps) \
     64 	(((ps) & MIPS3_SR_KSU_MASK) == MIPS3_SR_KSU_USER)
     65 
     66 /*
     67  * mips1-specific definitions
     68  */
     69 #define	MIPS1_PSL_LOWIPL	(MIPS_INT_MASK | MIPS_SR_INT_IE)
     70 
     71 #define	MIPS1_PSL_USERSET \
     72 	(MIPS1_SR_KU_OLD |	\
     73 	 MIPS1_SR_INT_ENA_OLD |	\
     74 	 MIPS1_SR_KU_PREV |	\
     75 	 MIPS1_SR_INT_ENA_PREV |\
     76 	 MIPS_INT_MASK)
     77 
     78 #define	MIPS1_USERMODE(ps) \
     79 	((ps) & MIPS1_SR_KU_PREV)
     80 
     81 /*
     82  * Choose mips3-only, mips1-only, or runtime-selected values.
     83  */
     84 
     85 #if defined(MIPS3_PLUS) && !defined(MIPS1) /* mips3 or greater only */
     86 # define  PSL_LOWIPL	MIPS3_PSL_LOWIPL
     87 # define  PSL_USERSET	MIPS3_PSL_USERSET
     88 # define  USERMODE(ps)	MIPS3_USERMODE(ps)
     89 #endif /* mips3 only */
     90 
     91 
     92 #if !defined(MIPS3_PLUS) && defined(MIPS1) /* mips1 only */
     93 # define  PSL_LOWIPL	MIPS1_PSL_LOWIPL
     94 # define  PSL_USERSET	MIPS1_PSL_USERSET
     95 # define  USERMODE(ps)	MIPS1_USERMODE(ps)
     96 #endif /* mips1 only */
     97 
     98 
     99 #if  MIPS3_PLUS +  MIPS1 > 1
    100 # define PSL_LOWIPL	(CPUISMIPS3 ? MIPS3_PSL_LOWIPL : MIPS1_PSL_LOWIPL)
    101 # define PSL_USERSET	(CPUISMIPS3 ? MIPS3_PSL_USERSET : MIPS1_PSL_USERSET)
    102 # define USERMODE(ps)	(CPUISMIPS3 ? MIPS3_USERMODE(ps) : MIPS1_USERMODE(ps))
    103 #endif
    104