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      1 /* 	$NetBSD: cpuvar.h,v 1.55 2025/05/01 05:17:31 imil Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2000, 2007 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by RedBack Networks Inc.
      9  *
     10  * Author: Bill Sommerfeld
     11  *
     12  * Redistribution and use in source and binary forms, with or without
     13  * modification, are permitted provided that the following conditions
     14  * are met:
     15  * 1. Redistributions of source code must retain the above copyright
     16  *    notice, this list of conditions and the following disclaimer.
     17  * 2. Redistributions in binary form must reproduce the above copyright
     18  *    notice, this list of conditions and the following disclaimer in the
     19  *    documentation and/or other materials provided with the distribution.
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     22  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     23  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     24  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     25  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     26  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     27  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     28  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     29  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     30  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     31  * POSSIBILITY OF SUCH DAMAGE.
     32  */
     33 
     34 /*
     35  * Copyright (c) 1999 Stefan Grefen
     36  *
     37  * Redistribution and use in source and binary forms, with or without
     38  * modification, are permitted provided that the following conditions
     39  * are met:
     40  * 1. Redistributions of source code must retain the above copyright
     41  *    notice, this list of conditions and the following disclaimer.
     42  * 2. Redistributions in binary form must reproduce the above copyright
     43  *    notice, this list of conditions and the following disclaimer in the
     44  *    documentation and/or other materials provided with the distribution.
     45  * 3. All advertising materials mentioning features or use of this software
     46  *    must display the following acknowledgement:
     47  *      This product includes software developed by the NetBSD
     48  *      Foundation, Inc. and its contributors.
     49  * 4. Neither the name of The NetBSD Foundation nor the names of its
     50  *    contributors may be used to endorse or promote products derived
     51  *    from this software without specific prior written permission.
     52  *
     53  * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND ANY
     54  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     55  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     56  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR AND CONTRIBUTORS BE LIABLE
     57  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     58  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     59  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     60  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     61  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     62  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     63  * SUCH DAMAGE.
     64  */
     65 
     66 #ifndef _X86_CPUVAR_H_
     67 #define	_X86_CPUVAR_H_
     68 
     69 struct cpu_info;
     70 struct cpu_functions {
     71 #ifndef XENPV
     72 	int (*start)(struct cpu_info *, paddr_t);
     73 #else /* XENPV */
     74    	int (*start)(struct cpu_info *, vaddr_t);
     75 #endif /* XENPV */
     76 	int (*stop)(struct cpu_info *);
     77 	void (*cleanup)(struct cpu_info *);
     78 };
     79 
     80 extern const struct cpu_functions mp_cpu_funcs;
     81 
     82 #define CPU_ROLE_SP	0
     83 #define CPU_ROLE_BP	1
     84 #define CPU_ROLE_AP	2
     85 
     86 struct cpu_attach_args {
     87 	int cpu_id;
     88 	int cpu_number;
     89 	int cpu_role;
     90 	const struct cpu_functions *cpu_func;
     91 };
     92 
     93 struct cpufeature_attach_args {
     94 	struct cpu_info *ci;
     95 	const char *name;
     96 };
     97 
     98 #ifdef _KERNEL
     99 #include <sys/kcpuset.h>
    100 #if defined(_KERNEL_OPT)
    101 #include "opt_multiprocessor.h"
    102 #include "opt_xen.h"
    103 #endif /* defined(_KERNEL_OPT) */
    104 
    105 extern int (*x86_ipi)(int, int, int);
    106 int x86_ipi_init(int);
    107 int x86_ipi_startup(int, int);
    108 void x86_errata(void);
    109 
    110 void identifycpu(struct cpu_info *);
    111 void identifycpu_cpuids(struct cpu_info *);
    112 void cpu_init(struct cpu_info *);
    113 void cpu_init_tss(struct cpu_info *);
    114 void cpu_init_first(void);
    115 void cpu_init_idt(struct cpu_info *);
    116 
    117 void x86_cpu_idle_init(void);
    118 void x86_cpu_idle_halt(void);
    119 void x86_cpu_idle_mwait(void);
    120 #ifdef XEN
    121 void x86_cpu_idle_xen(void);
    122 #endif
    123 
    124 void	cpu_get_tsc_freq(struct cpu_info *);
    125 void	pat_init(struct cpu_info *);
    126 
    127 bool	has_lapic(void);
    128 
    129 extern int cpu_vendor;
    130 extern bool x86_mp_online;
    131 extern u_int cpu_max_hypervisor_cpuid;
    132 
    133 extern uint32_t cpu_feature[7];
    134 
    135 #endif /* _KERNEL */
    136 
    137 #endif /* !_X86_CPUVAR_H_ */
    138