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cpufunc.h revision 1.19 
      1 /*	$NetBSD: cpufunc.h,v 1.19 2016/01/05 10:20:22 hannken Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1998, 2007 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, and by Andrew Doran.
      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  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #ifndef _X86_CPUFUNC_H_
     33 #define	_X86_CPUFUNC_H_
     34 
     35 /*
     36  * Functions to provide access to x86-specific instructions.
     37  */
     38 
     39 #include <sys/cdefs.h>
     40 #include <sys/types.h>
     41 
     42 #include <machine/segments.h>
     43 #include <machine/specialreg.h>
     44 
     45 #ifdef _KERNEL
     46 
     47 void	x86_pause(void);
     48 void	x86_lfence(void);
     49 void	x86_sfence(void);
     50 void	x86_mfence(void);
     51 void	x86_flush(void);
     52 #ifndef XEN
     53 void	x86_patch(bool);
     54 #endif
     55 void	invlpg(vaddr_t);
     56 void	lidt(struct region_descriptor *);
     57 void	lldt(u_short);
     58 void	ltr(u_short);
     59 void	lcr0(u_long);
     60 u_long	rcr0(void);
     61 void	lcr2(vaddr_t);
     62 vaddr_t	rcr2(void);
     63 void	lcr3(vaddr_t);
     64 vaddr_t	rcr3(void);
     65 void	lcr4(vaddr_t);
     66 vaddr_t	rcr4(void);
     67 void	lcr8(vaddr_t);
     68 vaddr_t	rcr8(void);
     69 void	tlbflush(void);
     70 void	tlbflushg(void);
     71 void	dr0(void *, uint32_t, uint32_t, uint32_t);
     72 vaddr_t	rdr6(void);
     73 void	ldr6(vaddr_t);
     74 void	wbinvd(void);
     75 void	breakpoint(void);
     76 void	x86_hlt(void);
     77 void	x86_stihlt(void);
     78 u_int	x86_getss(void);
     79 
     80 /* fpu save, restore etc */
     81 union savefpu;
     82 void	fldcw(const uint16_t *);
     83 void	fnclex(void);
     84 void	fninit(void);
     85 void	fnsave(union savefpu *);
     86 void	fnstcw(uint16_t *);
     87 uint16_t fngetsw(void);
     88 void	fnstsw(uint16_t *);
     89 void	frstor(const union savefpu *);
     90 void	fwait(void);
     91 void	clts(void);
     92 void	stts(void);
     93 void	fxsave(union savefpu *);
     94 void	fxrstor(const union savefpu *);
     95 void	x86_ldmxcsr(const uint32_t *);
     96 void	x86_stmxcsr(uint32_t *);
     97 
     98 void	fldummy(void);
     99 void	fp_divide_by_0(void);
    100 
    101 /* Extended processor state functions (for AVX registers etc) */
    102 
    103 uint64_t rdxcr(uint32_t);		/* xgetbv */
    104 void	wrxcr(uint32_t, uint64_t);	/* xsetgv */
    105 
    106 void	xrstor(const union savefpu *, uint64_t);
    107 void	xsave(union savefpu *, uint64_t);
    108 void	xsaveopt(union savefpu *, uint64_t);
    109 
    110 void	x86_monitor(const void *, uint32_t, uint32_t);
    111 void	x86_mwait(uint32_t, uint32_t);
    112 /* x86_cpuid2() writes four 32bit values, %eax, %ebx, %ecx and %edx */
    113 #define	x86_cpuid(a,b)	x86_cpuid2((a),0,(b))
    114 void	x86_cpuid2(uint32_t, uint32_t, uint32_t *);
    115 
    116 /* Use read_psl, write_psl when saving and restoring interrupt state. */
    117 void	x86_disable_intr(void);
    118 void	x86_enable_intr(void);
    119 u_long	x86_read_psl(void);
    120 void	x86_write_psl(u_long);
    121 
    122 /* Use read_flags, write_flags to adjust other members of %eflags. */
    123 u_long	x86_read_flags(void);
    124 void	x86_write_flags(u_long);
    125 
    126 void	x86_reset(void);
    127 
    128 /*
    129  * Some of the undocumented AMD64 MSRs need a 'passcode' to access.
    130  *
    131  * See LinuxBIOSv2: src/cpu/amd/model_fxx/model_fxx_init.c
    132  */
    133 
    134 #define	OPTERON_MSR_PASSCODE	0x9c5a203aU
    135 
    136 uint64_t	rdmsr(u_int);
    137 uint64_t	rdmsr_locked(u_int);
    138 int		rdmsr_safe(u_int, uint64_t *);
    139 uint64_t	rdtsc(void);
    140 uint64_t	rdpmc(u_int);
    141 void		wrmsr(u_int, uint64_t);
    142 void		wrmsr_locked(u_int, uint64_t);
    143 void		setfs(int);
    144 void		setusergs(int);
    145 
    146 #endif /* _KERNEL */
    147 
    148 #endif /* !_X86_CPUFUNC_H_ */
    149