146 lines
4.2 KiB
C
146 lines
4.2 KiB
C
/*
|
|
* Copyright (c) 2001 Wind River Systems, Inc.
|
|
* All rights reserved.
|
|
* Written by: John Baldwin <jhb@FreeBSD.org>
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 4. Neither the name of the author nor the names of any co-contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
/*
|
|
* This module provides MI support for per-cpu data.
|
|
*
|
|
* Each architecture determines the mapping of logical CPU IDs to physical
|
|
* CPUs. The requirements of this mapping are as follows:
|
|
* - Logical CPU IDs must reside in the range 0 ... MAXCPU - 1.
|
|
* - The mapping is not required to be dense. That is, there may be
|
|
* gaps in the mappings.
|
|
* - The platform sets the value of MAXCPU in <machine/param.h>.
|
|
* - It is suggested, but not required, that in the non-SMP case, the
|
|
* platform define MAXCPU to be 1 and define the logical ID of the
|
|
* sole CPU as 0.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include "opt_ddb.h"
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/linker_set.h>
|
|
#include <sys/lock.h>
|
|
#include <sys/pcpu.h>
|
|
#include <sys/proc.h>
|
|
#include <ddb/ddb.h>
|
|
|
|
static struct pcpu *cpuid_to_pcpu[MAXCPU];
|
|
struct cpuhead cpuhead = SLIST_HEAD_INITIALIZER(cpuhead);
|
|
|
|
/*
|
|
* Initialize the MI portions of a struct pcpu.
|
|
*/
|
|
void
|
|
pcpu_init(struct pcpu *pcpu, int cpuid, size_t size)
|
|
{
|
|
|
|
bzero(pcpu, size);
|
|
KASSERT(cpuid >= 0 && cpuid < MAXCPU,
|
|
("pcpu_init: invalid cpuid %d", cpuid));
|
|
pcpu->pc_cpuid = cpuid;
|
|
pcpu->pc_cpumask = 1 << cpuid;
|
|
cpuid_to_pcpu[cpuid] = pcpu;
|
|
SLIST_INSERT_HEAD(&cpuhead, pcpu, pc_allcpu);
|
|
cpu_pcpu_init(pcpu, cpuid, size);
|
|
}
|
|
|
|
/*
|
|
* Destroy a struct pcpu.
|
|
*/
|
|
void
|
|
pcpu_destroy(struct pcpu *pcpu)
|
|
{
|
|
|
|
SLIST_REMOVE(&cpuhead, pcpu, pcpu, pc_allcpu);
|
|
cpuid_to_pcpu[pcpu->pc_cpuid] = NULL;
|
|
}
|
|
|
|
/*
|
|
* Locate a struct pcpu by cpu id.
|
|
*/
|
|
struct pcpu *
|
|
pcpu_find(u_int cpuid)
|
|
{
|
|
|
|
return (cpuid_to_pcpu[cpuid]);
|
|
}
|
|
|
|
#ifdef DDB
|
|
DB_SHOW_COMMAND(pcpu, db_show_pcpu)
|
|
{
|
|
struct pcpu *pc;
|
|
struct thread *td;
|
|
int id;
|
|
|
|
if (have_addr)
|
|
id = ((addr >> 4) % 16) * 10 + (addr % 16);
|
|
else
|
|
id = PCPU_GET(cpuid);
|
|
pc = pcpu_find(id);
|
|
if (pc == NULL) {
|
|
db_printf("CPU %d not found\n", id);
|
|
return;
|
|
}
|
|
db_printf("cpuid = %d\n", pc->pc_cpuid);
|
|
db_printf("curthread = ");
|
|
td = pc->pc_curthread;
|
|
if (td != NULL)
|
|
db_printf("%p: pid %d \"%s\"\n", td, td->td_proc->p_pid,
|
|
td->td_proc->p_comm);
|
|
else
|
|
db_printf("none\n");
|
|
db_printf("curpcb = %p\n", pc->pc_curpcb);
|
|
db_printf("fpcurthread = ");
|
|
td = pc->pc_fpcurthread;
|
|
if (td != NULL)
|
|
db_printf("%p: pid %d \"%s\"\n", td, td->td_proc->p_pid,
|
|
td->td_proc->p_comm);
|
|
else
|
|
db_printf("none\n");
|
|
db_printf("idlethread = ");
|
|
td = pc->pc_idlethread;
|
|
if (td != NULL)
|
|
db_printf("%p: pid %d \"%s\"\n", td, td->td_proc->p_pid,
|
|
td->td_proc->p_comm);
|
|
else
|
|
db_printf("none\n");
|
|
db_show_mdpcpu(pc);
|
|
|
|
#ifdef WITNESS
|
|
db_printf("spin locks held:\n");
|
|
witness_list_locks(&pc->pc_spinlocks);
|
|
#endif
|
|
}
|
|
#endif
|