x86_var.h revision 338691
1/*- 2 * Copyright (c) 1995 Bruce D. Evans. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the author nor the names of contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD: stable/11/sys/x86/include/x86_var.h 338691 2018-09-14 23:21:52Z jhb $ 30 */ 31 32#ifndef _X86_X86_VAR_H_ 33#define _X86_X86_VAR_H_ 34 35/* 36 * Miscellaneous machine-dependent declarations. 37 */ 38 39extern long Maxmem; 40extern u_int basemem; 41extern int busdma_swi_pending; 42extern u_int cpu_exthigh; 43extern u_int cpu_feature; 44extern u_int cpu_feature2; 45extern u_int amd_feature; 46extern u_int amd_feature2; 47extern u_int amd_pminfo; 48extern u_int amd_extended_feature_extensions; 49extern u_int via_feature_rng; 50extern u_int via_feature_xcrypt; 51extern u_int cpu_clflush_line_size; 52extern u_int cpu_stdext_feature; 53extern u_int cpu_stdext_feature2; 54extern u_int cpu_stdext_feature3; 55extern uint64_t cpu_ia32_arch_caps; 56extern u_int cpu_fxsr; 57extern u_int cpu_high; 58extern u_int cpu_id; 59extern u_int cpu_max_ext_state_size; 60extern u_int cpu_mxcsr_mask; 61extern u_int cpu_procinfo; 62extern u_int cpu_procinfo2; 63extern char cpu_vendor[]; 64extern u_int cpu_vendor_id; 65extern u_int cpu_mon_mwait_flags; 66extern u_int cpu_mon_min_size; 67extern u_int cpu_mon_max_size; 68extern u_int cpu_maxphyaddr; 69extern char ctx_switch_xsave[]; 70extern u_int hv_high; 71extern char hv_vendor[]; 72extern char kstack[]; 73extern char sigcode[]; 74extern int szsigcode; 75extern int vm_page_dump_size; 76extern int workaround_erratum383; 77extern int _udatasel; 78extern int _ucodesel; 79extern int _ucode32sel; 80extern int _ufssel; 81extern int _ugssel; 82extern int use_xsave; 83extern uint64_t xsave_mask; 84extern int pti; 85extern int hw_ibrs_active; 86extern int hw_ssb_active; 87 88struct pcb; 89struct thread; 90struct reg; 91struct fpreg; 92struct dbreg; 93struct dumperinfo; 94struct trapframe; 95 96/* 97 * The interface type of the interrupt handler entry point cannot be 98 * expressed in C. Use simplest non-variadic function type as an 99 * approximation. 100 */ 101typedef void alias_for_inthand_t(void); 102 103/* 104 * Returns the maximum physical address that can be used with the 105 * current system. 106 */ 107static __inline vm_paddr_t 108cpu_getmaxphyaddr(void) 109{ 110#if defined(__i386__) && !defined(PAE) 111 return (0xffffffff); 112#else 113 return ((1ULL << cpu_maxphyaddr) - 1); 114#endif 115} 116 117void *alloc_fpusave(int flags); 118void busdma_swi(void); 119bool cpu_mwait_usable(void); 120void cpu_probe_amdc1e(void); 121void cpu_setregs(void); 122void dump_add_page(vm_paddr_t); 123void dump_drop_page(vm_paddr_t); 124void finishidentcpu(void); 125void identify_cpu1(void); 126void identify_cpu2(void); 127void identify_hypervisor(void); 128void initializecpu(void); 129void initializecpucache(void); 130bool fix_cpuid(void); 131void fillw(int /*u_short*/ pat, void *base, size_t cnt); 132int is_physical_memory(vm_paddr_t addr); 133int isa_nmi(int cd); 134void handle_ibrs_entry(void); 135void handle_ibrs_exit(void); 136void hw_ibrs_recalculate(void); 137void hw_ssb_recalculate(bool all_cpus); 138void nmi_call_kdb(u_int cpu, u_int type, struct trapframe *frame); 139void nmi_call_kdb_smp(u_int type, struct trapframe *frame); 140void nmi_handle_intr(u_int type, struct trapframe *frame); 141void pagecopy(void *from, void *to); 142void printcpuinfo(void); 143int pti_get_default(void); 144int user_dbreg_trap(register_t dr6); 145int minidumpsys(struct dumperinfo *); 146struct pcb *get_pcb_td(struct thread *td); 147 148#endif 149