150 lines
4.4 KiB
C
150 lines
4.4 KiB
C
/* $NetBSD: multicpu.c,v 1.6 2001/05/29 21:55:00 ragge Exp $ */
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/*
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* Copyright (c) 2000 Ludd, University of Lule}, Sweden. All rights reserved.
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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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed at Ludd, University of
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* Lule}, Sweden and its contributors.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* CPU-type independent code to spin up other VAX CPU's.
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*/
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#include "opt_multiprocessor.h"
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#include <sys/param.h>
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#include <sys/queue.h>
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#include <sys/malloc.h>
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#include <sys/proc.h>
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#include <sys/user.h>
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#include <sys/device.h>
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#include <uvm/uvm_extern.h>
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#include <machine/cpu.h>
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#include "ioconf.h"
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static void slaverun(void);
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struct cpuq {
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SIMPLEQ_ENTRY(cpuq) cq_q;
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struct cpu_info *cq_ci;
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struct device *cq_dev;
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};
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SIMPLEQ_HEAD(, cpuq) cpuq = SIMPLEQ_HEAD_INITIALIZER(cpuq);
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extern long avail_start, avail_end, proc0paddr;
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void
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cpu_boot_secondary_processors()
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{
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struct cpuq *q;
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while ((q = SIMPLEQ_FIRST(&cpuq))) {
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SIMPLEQ_REMOVE_HEAD(&cpuq, q, cq_q);
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(*dep_call->cpu_startslave)(q->cq_dev, q->cq_ci);
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free(q, M_TEMP);
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}
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}
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/*
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* Allocate an UAREA for this CPU, create an idle PCB, get a cpu_info
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* struct and fill it in and prepare for getting started by
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* cpu_boot_secondary_processors().
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*/
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struct cpu_info *
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cpu_slavesetup(struct device *dev)
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{
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struct cpuq *cq;
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struct cpu_info *ci;
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struct pglist mlist;
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struct vm_page *pg;
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struct pcb *pcb;
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vaddr_t istackbase, scratch;
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int error;
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/* Get an UAREA */
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TAILQ_INIT(&mlist);
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error = uvm_pglistalloc(USPACE, avail_start, avail_end, 0, 0,
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&mlist, 1, 1);
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if (error)
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panic("cpu_slavesetup: error %d", error);
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pcb = (struct pcb *)(VM_PAGE_TO_PHYS(TAILQ_FIRST(&mlist)) | KERNBASE);
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/* Copy our own idle PCB */
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memcpy(pcb, (void *)proc0paddr, sizeof(struct user));
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kvtopte((u_int)pcb + REDZONEADDR)->pg_v = 0;
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/* Allocate an interrupt stack */
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pg = uvm_pagealloc(NULL, 0, NULL, 0);
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if (pg == NULL)
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panic("cpu_slavesetup2");
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istackbase = VM_PAGE_TO_PHYS(pg) | KERNBASE;
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kvtopte(istackbase)->pg_v = 0; /* istack safety belt */
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/* Get scratch pages for different use, see pmap.c for comment */
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pg = uvm_pagealloc(NULL, 0, NULL, 0);
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if (pg == NULL)
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panic("cpu_slavesetup3");
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scratch = VM_PAGE_TO_PHYS(pg) | KERNBASE;
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/* Populate the PCB and the cpu_info struct */
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ci = (struct cpu_info *)(scratch + VAX_NBPG);
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memset(ci, 0, sizeof(struct cpu_info));
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ci->ci_dev = dev;
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ci->ci_exit = scratch;
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(u_long)ci->ci_pcb = (u_long)pcb & ~KERNBASE;
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ci->ci_istack = istackbase + NBPG;
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pcb->KSP = (u_long)pcb + USPACE; /* Idle kernel stack */
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pcb->SSP = (u_long)ci;
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pcb->PC = (u_long)slaverun + 2;
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pcb->PSL = 0;
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cq = malloc(sizeof(*cq), M_TEMP, M_NOWAIT);
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if (cq == NULL)
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panic("cpu_slavesetup4");
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memset(cq, 0, sizeof(*cq));
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cq->cq_ci = ci;
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cq->cq_dev = dev;
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SIMPLEQ_INSERT_TAIL(&cpuq, cq, cq_q);
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return ci;
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}
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void
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slaverun()
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{
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struct cpu_info *ci = curcpu();
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((volatile struct cpu_info *)ci)->ci_flags |= CI_RUNNING;
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printf("%s: running\n", ci->ci_dev->dv_xname);
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splsched();
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sched_lock_idle();
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cpu_switch(0);
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}
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