70f20a1217
virtual memory reservation and a private pool of memory pages -- by a scheme based on memory pools. This allows better utilization of memory because buffers can now be allocated with a granularity finer than the system's native page size (useful for filesystems with e.g. 1k or 2k fragment sizes). It also avoids fragmentation of virtual to physical memory mappings (due to the former fixed virtual address reservation) resulting in better utilization of MMU resources on some platforms. Finally, the scheme is more flexible by allowing run-time decisions on the amount of memory to be used for buffers. On the other hand, the effectiveness of the LRU queue for buffer recycling may be somewhat reduced compared to the traditional method since, due to the nature of the pool based memory allocation, the actual least recently used buffer may release its memory to a pool different from the one needed by a newly allocated buffer. However, this effect will kick in only if the system is under memory pressure.
373 lines
10 KiB
C
373 lines
10 KiB
C
/* $NetBSD: cpu.h,v 1.3 2003/12/30 12:33:15 pk Exp $ */
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/*-
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* Copyright (c) 1990 The Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* William Jolitz.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)cpu.h 5.4 (Berkeley) 5/9/91
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*/
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#ifndef _AMD64_CPU_H_
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#define _AMD64_CPU_H_
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#if defined(_KERNEL_OPT)
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#include "opt_multiprocessor.h"
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#include "opt_lockdebug.h"
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#endif
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/*
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* Definitions unique to x86-64 cpu support.
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*/
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#include <machine/frame.h>
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#include <machine/segments.h>
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#include <machine/tss.h>
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#include <machine/intrdefs.h>
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#include <x86/cacheinfo.h>
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#include <sys/device.h>
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#include <sys/lock.h>
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#include <sys/sched.h>
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struct cpu_info {
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struct device *ci_dev;
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struct cpu_info *ci_self;
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struct schedstate_percpu ci_schedstate; /* scheduler state */
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struct cpu_info *ci_next;
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struct lwp *ci_curlwp;
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struct simplelock ci_slock;
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u_int ci_cpuid;
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u_int ci_apicid;
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u_long ci_spin_locks;
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u_long ci_simple_locks;
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u_int64_t ci_scratch;
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struct lwp *ci_fpcurlwp;
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int ci_fpsaving;
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volatile u_int32_t ci_tlb_ipi_mask;
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struct pcb *ci_curpcb;
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struct pcb *ci_idle_pcb;
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int ci_idle_tss_sel;
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struct intrsource *ci_isources[MAX_INTR_SOURCES];
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u_int32_t ci_ipending;
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int ci_ilevel;
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int ci_idepth;
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u_int32_t ci_imask[NIPL];
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u_int32_t ci_iunmask[NIPL];
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paddr_t ci_idle_pcb_paddr;
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u_int ci_flags;
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u_int32_t ci_ipis;
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u_int32_t ci_feature_flags;
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u_int32_t ci_signature;
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u_int64_t ci_tsc_freq;
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struct cpu_functions *ci_func;
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void (*cpu_setup) __P((struct cpu_info *));
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void (*ci_info) __P((struct cpu_info *));
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int ci_want_resched;
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int ci_astpending;
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struct trapframe *ci_ddb_regs;
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struct x86_cache_info ci_cinfo[CAI_COUNT];
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struct timeval ci_cc_time;
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int64_t ci_cc_cc;
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int64_t ci_cc_ms_delta;
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int64_t ci_cc_denom;
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char *ci_gdt;
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struct x86_64_tss ci_doubleflt_tss;
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struct x86_64_tss ci_ddbipi_tss;
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char *ci_doubleflt_stack;
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char *ci_ddbipi_stack;
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struct evcnt ci_ipi_events[X86_NIPI];
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};
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#define CPUF_BSP 0x0001 /* CPU is the original BSP */
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#define CPUF_AP 0x0002 /* CPU is an AP */
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#define CPUF_SP 0x0004 /* CPU is only processor */
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#define CPUF_PRIMARY 0x0008 /* CPU is active primary processor */
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#define CPUF_PRESENT 0x1000 /* CPU is present */
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#define CPUF_RUNNING 0x2000 /* CPU is running */
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#define CPUF_PAUSE 0x4000 /* CPU is paused in DDB */
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#define CPUF_GO 0x8000 /* CPU should start running */
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extern struct cpu_info cpu_info_primary;
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extern struct cpu_info *cpu_info_list;
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#define CPU_INFO_ITERATOR int
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#define CPU_INFO_FOREACH(cii, ci) cii = 0, ci = cpu_info_list; \
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ci != NULL; ci = ci->ci_next
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#if defined(MULTIPROCESSOR)
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#define X86_MAXPROCS 32 /* bitmask; can be bumped to 64 */
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#define CPU_STARTUP(_ci) ((_ci)->ci_func->start(_ci))
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#define CPU_STOP(_ci) ((_ci)->ci_func->stop(_ci))
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#define CPU_START_CLEANUP(_ci) ((_ci)->ci_func->cleanup(_ci))
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#define curcpu() ({struct cpu_info *__ci; \
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asm volatile("movq %%gs:8,%0" : "=r" (__ci)); \
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__ci;})
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#define cpu_number() (curcpu()->ci_cpuid)
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#define CPU_IS_PRIMARY(ci) ((ci)->ci_flags & CPUF_PRIMARY)
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extern struct cpu_info *cpu_info[X86_MAXPROCS];
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void cpu_boot_secondary_processors __P((void));
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void cpu_init_idle_pcbs __P((void));
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/*
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* Preempt the current process if in interrupt from user mode,
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* or after the current trap/syscall if in system mode.
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*/
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extern void need_resched __P((struct cpu_info *));
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#else /* !MULTIPROCESSOR */
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#define X86_MAXPROCS 1
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#ifdef _KERNEL
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extern struct cpu_info cpu_info_primary;
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#define curcpu() (&cpu_info_primary)
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#endif
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/*
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* definitions of cpu-dependent requirements
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* referenced in generic code
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*/
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#define cpu_number() 0
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#define CPU_IS_PRIMARY(ci) 1
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/*
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* Preempt the current process if in interrupt from user mode,
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* or after the current trap/syscall if in system mode.
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*/
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#define need_resched(ci) \
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do { \
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struct cpu_info *__ci = (ci); \
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__ci->ci_want_resched = 1; \
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if (__ci->ci_curlwp != NULL) \
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aston(__ci->ci_curlwp->l_proc); \
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} while (/*CONSTCOND*/0)
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#endif
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#define aston(p) ((p)->p_md.md_astpending = 1)
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extern u_int32_t cpus_attached;
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#define curpcb curcpu()->ci_curpcb
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#define curlwp curcpu()->ci_curlwp
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/*
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* Arguments to hardclock, softclock and statclock
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* encapsulate the previous machine state in an opaque
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* clockframe; for now, use generic intrframe.
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*/
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#define clockframe intrframe
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#define CLKF_USERMODE(frame) USERMODE((frame)->if_cs, (frame)->if_rflags)
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#define CLKF_BASEPRI(frame) (0)
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#define CLKF_PC(frame) ((frame)->if_rip)
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#define CLKF_INTR(frame) (curcpu()->ci_idepth > 1)
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/*
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* This is used during profiling to integrate system time. It can safely
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* assume that the process is resident.
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*/
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#define LWP_PC(l) ((l)->l_md.md_regs->tf_rip)
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/*
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* Give a profiling tick to the current process when the user profiling
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* buffer pages are invalid. On the i386, request an ast to send us
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* through trap(), marking the proc as needing a profiling tick.
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*/
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#define need_proftick(p) ((p)->p_flag |= P_OWEUPC, aston(p))
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/*
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* Notify the current process (p) that it has a signal pending,
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* process as soon as possible.
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*/
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#define signotify(p) aston(p)
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/*
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* We need a machine-independent name for this.
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*/
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extern void (*delay_func) __P((int));
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struct timeval;
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extern void (*microtime_func) __P((struct timeval *));
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#define DELAY(x) (*delay_func)(x)
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#define delay(x) (*delay_func)(x)
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#define microtime(tv) (*microtime_func)(tv)
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/*
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* pull in #defines for kinds of processors
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*/
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#ifdef _KERNEL
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extern int biosbasemem;
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extern int biosextmem;
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extern int cpu;
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extern int cpu_feature;
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extern int cpu_id;
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extern char cpu_vendor[];
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extern int cpuid_level;
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/* kern_microtime.c */
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extern struct timeval cc_microset_time;
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void cc_microtime __P((struct timeval *));
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void cc_microset __P((struct cpu_info *));
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/* identcpu.c */
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void identifycpu __P((struct cpu_info *));
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void cpu_probe_features __P((struct cpu_info *));
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/* machdep.c */
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void delay __P((int));
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void dumpconf __P((void));
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int cpu_maxproc __P((void));
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void cpu_reset __P((void));
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void x86_64_proc0_tss_ldt_init __P((void));
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void x86_64_init_pcb_tss_ldt __P((struct cpu_info *));
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void cpu_proc_fork __P((struct proc *, struct proc *));
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struct region_descriptor;
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void lgdt __P((struct region_descriptor *));
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void fillw __P((short, void *, size_t));
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struct pcb;
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void savectx __P((struct pcb *));
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void switch_exit __P((struct lwp *, void (*)(struct lwp *)));
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void proc_trampoline __P((void));
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void child_trampoline __P((void));
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/* clock.c */
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void initrtclock __P((void));
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void startrtclock __P((void));
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void i8254_delay __P((int));
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void i8254_microtime __P((struct timeval *));
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void i8254_initclocks __P((void));
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void cpu_init_msrs __P((struct cpu_info *));
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/* vm_machdep.c */
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int kvtop __P((caddr_t));
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/* trap.c */
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void child_return __P((void *));
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/* consinit.c */
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void kgdb_port_init __P((void));
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/* bus_machdep.c */
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void x86_bus_space_init __P((void));
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void x86_bus_space_mallocok __P((void));
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#endif /* _KERNEL */
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#include <machine/psl.h>
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/*
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* CTL_MACHDEP definitions.
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*/
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#define CPU_CONSDEV 1 /* dev_t: console terminal device */
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#define CPU_BIOSBASEMEM 2 /* int: bios-reported base mem (K) */
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#define CPU_BIOSEXTMEM 3 /* int: bios-reported ext. mem (K) */
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#define CPU_NKPDE 4 /* int: number of kernel PDEs */
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#define CPU_BOOTED_KERNEL 5 /* string: booted kernel name */
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#define CPU_DISKINFO 6 /* disk geometry information */
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#define CPU_FPU_PRESENT 7 /* FPU is present */
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#define CPU_MAXID 8 /* number of valid machdep ids */
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#define CTL_MACHDEP_NAMES { \
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{ 0, 0 }, \
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{ "console_device", CTLTYPE_STRUCT }, \
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{ "biosbasemem", CTLTYPE_INT }, \
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{ "biosextmem", CTLTYPE_INT }, \
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{ "nkpde", CTLTYPE_INT }, \
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{ "booted_kernel", CTLTYPE_STRING }, \
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{ "diskinfo", CTLTYPE_STRUCT }, \
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{ "fpu_present", CTLTYPE_INT }, \
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}
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/*
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* Structure for CPU_DISKINFO sysctl call.
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* XXX this should be somewhere else.
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*/
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#define MAX_BIOSDISKS 16
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struct disklist {
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int dl_nbiosdisks; /* number of bios disks */
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struct biosdisk_info {
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int bi_dev; /* BIOS device # (0x80 ..) */
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int bi_cyl; /* cylinders on disk */
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int bi_head; /* heads per track */
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int bi_sec; /* sectors per track */
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u_int64_t bi_lbasecs; /* total sec. (iff ext13) */
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#define BIFLAG_INVALID 0x01
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#define BIFLAG_EXTINT13 0x02
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int bi_flags;
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} dl_biosdisks[MAX_BIOSDISKS];
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int dl_nnativedisks; /* number of native disks */
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struct nativedisk_info {
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char ni_devname[16]; /* native device name */
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int ni_nmatches; /* # of matches w/ BIOS */
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int ni_biosmatches[MAX_BIOSDISKS]; /* indices in dl_biosdisks */
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} dl_nativedisks[1]; /* actually longer */
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};
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#endif /* !_AMD64_CPU_H_ */
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