240 lines
7.1 KiB
C
240 lines
7.1 KiB
C
/*-
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* Copyright (c) 2001 Wind River Systems, Inc.
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* All rights reserved.
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* Written by: John Baldwin <jhb@FreeBSD.org>
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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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* 4. Neither the name of the author nor the names of any co-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 AUTHOR 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 AUTHOR 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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* $FreeBSD$
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*/
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#ifndef _SYS_PCPU_H_
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#define _SYS_PCPU_H_
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#ifdef LOCORE
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#error "no assembler-serviceable parts inside"
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#endif
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#include <sys/_cpuset.h>
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#include <sys/_lock.h>
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#include <sys/_mutex.h>
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#include <sys/_sx.h>
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#include <sys/queue.h>
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#include <sys/_rmlock.h>
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#include <sys/vmmeter.h>
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#include <sys/resource.h>
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#include <machine/pcpu.h>
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#define DPCPU_SETNAME "set_pcpu"
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#define DPCPU_SYMPREFIX "pcpu_entry_"
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#ifdef _KERNEL
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/*
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* Define a set for pcpu data.
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*/
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extern uintptr_t *__start_set_pcpu;
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__GLOBL(__start_set_pcpu);
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extern uintptr_t *__stop_set_pcpu;
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__GLOBL(__stop_set_pcpu);
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/*
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* Array of dynamic pcpu base offsets. Indexed by id.
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*/
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extern uintptr_t dpcpu_off[];
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/*
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* Convenience defines.
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*/
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#define DPCPU_START ((uintptr_t)&__start_set_pcpu)
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#define DPCPU_STOP ((uintptr_t)&__stop_set_pcpu)
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#define DPCPU_BYTES (DPCPU_STOP - DPCPU_START)
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#define DPCPU_MODMIN 2048
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#define DPCPU_SIZE roundup2(DPCPU_BYTES, PAGE_SIZE)
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#define DPCPU_MODSIZE (DPCPU_SIZE - (DPCPU_BYTES - DPCPU_MODMIN))
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/*
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* Declaration and definition.
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*/
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#define DPCPU_NAME(n) pcpu_entry_##n
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#define DPCPU_DECLARE(t, n) extern t DPCPU_NAME(n)
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#define DPCPU_DEFINE(t, n) t DPCPU_NAME(n) __section(DPCPU_SETNAME) __used
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/*
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* Accessors with a given base.
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*/
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#define _DPCPU_PTR(b, n) \
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(__typeof(DPCPU_NAME(n))*)((b) + (uintptr_t)&DPCPU_NAME(n))
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#define _DPCPU_GET(b, n) (*_DPCPU_PTR(b, n))
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#define _DPCPU_SET(b, n, v) (*_DPCPU_PTR(b, n) = v)
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/*
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* Accessors for the current cpu.
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*/
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#define DPCPU_PTR(n) _DPCPU_PTR(PCPU_GET(dynamic), n)
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#define DPCPU_GET(n) (*DPCPU_PTR(n))
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#define DPCPU_SET(n, v) (*DPCPU_PTR(n) = v)
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/*
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* Accessors for remote cpus.
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*/
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#define DPCPU_ID_PTR(i, n) _DPCPU_PTR(dpcpu_off[(i)], n)
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#define DPCPU_ID_GET(i, n) (*DPCPU_ID_PTR(i, n))
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#define DPCPU_ID_SET(i, n, v) (*DPCPU_ID_PTR(i, n) = v)
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/*
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* Utility macros.
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*/
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#define DPCPU_SUM(n) __extension__ \
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({ \
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u_int _i; \
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__typeof(*DPCPU_PTR(n)) sum; \
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\
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sum = 0; \
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CPU_FOREACH(_i) { \
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sum += *DPCPU_ID_PTR(_i, n); \
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} \
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sum; \
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})
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#define DPCPU_VARSUM(n, var) __extension__ \
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({ \
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u_int _i; \
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__typeof((DPCPU_PTR(n))->var) sum; \
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\
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sum = 0; \
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CPU_FOREACH(_i) { \
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sum += (DPCPU_ID_PTR(_i, n))->var; \
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} \
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sum; \
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})
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#define DPCPU_ZERO(n) do { \
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u_int _i; \
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\
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CPU_FOREACH(_i) { \
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bzero(DPCPU_ID_PTR(_i, n), sizeof(*DPCPU_PTR(n))); \
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} \
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} while(0)
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#endif /* _KERNEL */
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/*
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* This structure maps out the global data that needs to be kept on a
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* per-cpu basis. The members are accessed via the PCPU_GET/SET/PTR
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* macros defined in <machine/pcpu.h>. Machine dependent fields are
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* defined in the PCPU_MD_FIELDS macro defined in <machine/pcpu.h>.
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*/
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struct pcpu {
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struct thread *pc_curthread; /* Current thread */
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struct thread *pc_idlethread; /* Idle thread */
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struct thread *pc_fpcurthread; /* Fp state owner */
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struct thread *pc_deadthread; /* Zombie thread or NULL */
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struct pcb *pc_curpcb; /* Current pcb */
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uint64_t pc_switchtime; /* cpu_ticks() at last csw */
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int pc_switchticks; /* `ticks' at last csw */
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u_int pc_cpuid; /* This cpu number */
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STAILQ_ENTRY(pcpu) pc_allcpu;
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struct lock_list_entry *pc_spinlocks;
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struct vmmeter pc_cnt; /* VM stats counters */
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long pc_cp_time[CPUSTATES]; /* statclock ticks */
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struct device *pc_device;
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void *pc_netisr; /* netisr SWI cookie */
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int pc_unused1; /* unused field */
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int pc_domain; /* Memory domain. */
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struct rm_queue pc_rm_queue; /* rmlock list of trackers */
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uintptr_t pc_dynamic; /* Dynamic per-cpu data area */
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/*
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* Keep MD fields last, so that CPU-specific variations on a
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* single architecture don't result in offset variations of
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* the machine-independent fields of the pcpu. Even though
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* the pcpu structure is private to the kernel, some ports
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* (e.g., lsof, part of gtop) define _KERNEL and include this
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* header. While strictly speaking this is wrong, there's no
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* reason not to keep the offsets of the MI fields constant
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* if only to make kernel debugging easier.
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*/
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PCPU_MD_FIELDS;
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} __aligned(CACHE_LINE_SIZE);
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#ifdef CTASSERT
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/*
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* To minimize memory waste in per-cpu UMA zones, size of struct pcpu
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* should be denominator of PAGE_SIZE.
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*/
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CTASSERT((PAGE_SIZE / sizeof(struct pcpu)) * sizeof(struct pcpu) == PAGE_SIZE);
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#endif
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#ifdef _KERNEL
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STAILQ_HEAD(cpuhead, pcpu);
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extern struct cpuhead cpuhead;
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extern struct pcpu *cpuid_to_pcpu[];
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#define curcpu PCPU_GET(cpuid)
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#define curproc (curthread->td_proc)
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#ifndef curthread
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#define curthread PCPU_GET(curthread)
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#endif
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#define curvidata PCPU_GET(vidata)
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/* Accessor to elements allocated via UMA_ZONE_PCPU zone. */
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static inline void *
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zpcpu_get(void *base)
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{
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return ((char *)(base) + sizeof(struct pcpu) * curcpu);
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}
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static inline void *
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zpcpu_get_cpu(void *base, int cpu)
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{
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return ((char *)(base) + sizeof(struct pcpu) * cpu);
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}
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/*
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* Machine dependent callouts. cpu_pcpu_init() is responsible for
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* initializing machine dependent fields of struct pcpu, and
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* db_show_mdpcpu() is responsible for handling machine dependent
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* fields for the DDB 'show pcpu' command.
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*/
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void cpu_pcpu_init(struct pcpu *pcpu, int cpuid, size_t size);
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void db_show_mdpcpu(struct pcpu *pcpu);
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void *dpcpu_alloc(int size);
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void dpcpu_copy(void *s, int size);
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void dpcpu_free(void *s, int size);
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void dpcpu_init(void *dpcpu, int cpuid);
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void pcpu_destroy(struct pcpu *pcpu);
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struct pcpu *pcpu_find(u_int cpuid);
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void pcpu_init(struct pcpu *pcpu, int cpuid, size_t size);
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#endif /* _KERNEL */
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#endif /* !_SYS_PCPU_H_ */
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