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Diffstat (limited to 'sys/arch/i386/include/cpufunc.h')
| -rw-r--r-- | sys/arch/i386/include/cpufunc.h | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/sys/arch/i386/include/cpufunc.h b/sys/arch/i386/include/cpufunc.h new file mode 100644 index 00000000000..6a35e8deb1f --- /dev/null +++ b/sys/arch/i386/include/cpufunc.h @@ -0,0 +1,134 @@ +/* $NetBSD: cpufunc.h,v 1.8 1994/10/27 04:15:59 cgd Exp $ */ + +/* + * Copyright (c) 1993 Charles Hannum. + * 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. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by Charles Hannum. + * 4. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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. + */ + +#ifndef _I386_CPUFUNC_H_ +#define _I386_CPUFUNC_H_ + +/* + * Functions to provide access to i386-specific instructions. + */ + +#include <sys/cdefs.h> +#include <sys/types.h> + +static __inline int bdb(void) +{ + extern int bdb_exists; + + if (!bdb_exists) + return (0); + __asm __volatile("int $3"); + return (1); +} + +static __inline void +lidt(void *p) +{ + __asm __volatile("lidt (%0)" : : "r" (p)); +} + +static __inline void +lldt(u_short sel) +{ + __asm __volatile("lldt %0" : : "r" (sel)); +} + +static __inline void +ltr(u_short sel) +{ + __asm __volatile("ltr %0" : : "r" (sel)); +} + +static __inline void +lcr0(u_int val) +{ + __asm __volatile("movl %0,%%cr0" : : "r" (val)); +} + +static __inline u_int +rcr0(void) +{ + u_int val; + __asm __volatile("movl %%cr0,%0" : "=r" (val)); + return val; +} + +static __inline u_int +rcr2(void) +{ + u_int val; + __asm __volatile("movl %%cr2,%0" : "=r" (val)); + return val; +} + +static __inline void +lcr3(u_int val) +{ + __asm __volatile("movl %0,%%cr3" : : "r" (val)); +} + +static __inline u_int +rcr3(void) +{ + u_int val; + __asm __volatile("movl %%cr3,%0" : "=r" (val)); + return val; +} + +static __inline void +tlbflush(void) +{ + u_int val; + __asm __volatile("movl %%cr3,%0" : "=r" (val)); + __asm __volatile("movl %0,%%cr3" : : "r" (val)); +} + +#ifdef notyet +void setidt __P((int idx, /*XXX*/caddr_t func, int typ, int dpl)); +#endif + + +/* XXXX ought to be in psl.h with spl() functions */ + +static __inline void +disable_intr(void) +{ + __asm __volatile("cli"); +} + +static __inline void +enable_intr(void) +{ + __asm __volatile("sti"); +} + +#endif /* !_I386_CPUFUNC_H_ */ |