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cpufunc.h revision 1.16.12.1 
      1 /*	$NetBSD: cpufunc.h,v 1.16.12.1 2000/11/20 20:09:26 bouyer Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1998 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Charles M. Hannum.
      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. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *        This product includes software developed by the NetBSD
     21  *        Foundation, Inc. and its contributors.
     22  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23  *    contributors may be used to endorse or promote products derived
     24  *    from this software without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36  * POSSIBILITY OF SUCH DAMAGE.
     37  */
     38 
     39 #ifndef _I386_CPUFUNC_H_
     40 #define	_I386_CPUFUNC_H_
     41 
     42 /*
     43  * Functions to provide access to i386-specific instructions.
     44  */
     45 
     46 #include <sys/cdefs.h>
     47 #include <sys/types.h>
     48 
     49 #ifdef _KERNEL
     50 
     51 static __inline void
     52 invlpg(u_int addr)
     53 {
     54         __asm __volatile("invlpg (%0)" : : "r" (addr) : "memory");
     55 }
     56 
     57 static __inline void
     58 lidt(void *p)
     59 {
     60 	__asm __volatile("lidt (%0)" : : "r" (p));
     61 }
     62 
     63 static __inline void
     64 lldt(u_short sel)
     65 {
     66 	__asm __volatile("lldt %0" : : "r" (sel));
     67 }
     68 
     69 static __inline void
     70 ltr(u_short sel)
     71 {
     72 	__asm __volatile("ltr %0" : : "r" (sel));
     73 }
     74 
     75 static __inline void
     76 lcr0(u_int val)
     77 {
     78 	__asm __volatile("movl %0,%%cr0" : : "r" (val));
     79 }
     80 
     81 static __inline u_int
     82 rcr0(void)
     83 {
     84 	u_int val;
     85 	__asm __volatile("movl %%cr0,%0" : "=r" (val));
     86 	return val;
     87 }
     88 
     89 static __inline u_int
     90 rcr2(void)
     91 {
     92 	u_int val;
     93 	__asm __volatile("movl %%cr2,%0" : "=r" (val));
     94 	return val;
     95 }
     96 
     97 static __inline void
     98 lcr3(u_int val)
     99 {
    100 	__asm __volatile("movl %0,%%cr3" : : "r" (val));
    101 }
    102 
    103 static __inline u_int
    104 rcr3(void)
    105 {
    106 	u_int val;
    107 	__asm __volatile("movl %%cr3,%0" : "=r" (val));
    108 	return val;
    109 }
    110 
    111 static __inline void
    112 lcr4(u_int val)
    113 {
    114 	__asm __volatile("movl %0,%%cr4" : : "r" (val));
    115 }
    116 
    117 static __inline u_int
    118 rcr4(void)
    119 {
    120 	u_int val;
    121 	__asm __volatile("movl %%cr4,%0" : "=r" (val));
    122 	return val;
    123 }
    124 
    125 static __inline void
    126 tlbflush(void)
    127 {
    128 	u_int val;
    129 	__asm __volatile("movl %%cr3,%0" : "=r" (val));
    130 	__asm __volatile("movl %0,%%cr3" : : "r" (val));
    131 }
    132 
    133 #ifdef notyet
    134 void	setidt	__P((int idx, /*XXX*/caddr_t func, int typ, int dpl));
    135 #endif
    136 
    137 
    138 /* XXXX ought to be in psl.h with spl() functions */
    139 
    140 static __inline void
    141 disable_intr(void)
    142 {
    143 	__asm __volatile("cli");
    144 }
    145 
    146 static __inline void
    147 enable_intr(void)
    148 {
    149 	__asm __volatile("sti");
    150 }
    151 
    152 static __inline u_long
    153 read_eflags(void)
    154 {
    155 	u_long	ef;
    156 
    157 	__asm __volatile("pushfl; popl %0" : "=r" (ef));
    158 	return (ef);
    159 }
    160 
    161 static __inline void
    162 write_eflags(u_long ef)
    163 {
    164 	__asm __volatile("pushl %0; popfl" : : "r" (ef));
    165 }
    166 
    167 static __inline u_int64_t
    168 rdmsr(u_int msr)
    169 {
    170 	u_int64_t rv;
    171 
    172 	__asm __volatile("rdmsr" : "=A" (rv) : "c" (msr));
    173 	return (rv);
    174 }
    175 
    176 static __inline void
    177 wrmsr(u_int msr, u_int64_t newval)
    178 {
    179 	__asm __volatile("wrmsr" : : "A" (newval), "c" (msr));
    180 }
    181 
    182 static __inline void
    183 wbinvd(void)
    184 {
    185 	__asm __volatile("wbinvd");
    186 }
    187 
    188 static __inline u_int64_t
    189 rdtsc(void)
    190 {
    191 	u_int64_t rv;
    192 
    193 	__asm __volatile("rdtsc" : "=A" (rv));
    194 	return (rv);
    195 }
    196 
    197 static __inline u_int64_t
    198 rdpmc(u_int pmc)
    199 {
    200 	u_int64_t rv;
    201 
    202 	__asm __volatile("rdpmc" : "=A" (rv) : "c" (pmc));
    203 	return (rv);
    204 }
    205 
    206 /* Break into DDB/KGDB. */
    207 static __inline void
    208 breakpoint(void)
    209 {
    210 	__asm __volatile("int $3");
    211 }
    212 
    213 #endif /* _KERNEL */
    214 
    215 #endif /* !_I386_CPUFUNC_H_ */
    216