source: mainline/kernel/arch/ia64/src/smp/smp.c@ 1baec4b

/*
 * Copyright (c) 2005 Jakub Vana
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - 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.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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.
 */

/** @addtogroup ia64
 * @{
 */
/** @file
 */

#include <arch.h>
#include <arch/ski/ski.h>
#include <arch/drivers/it.h>
#include <arch/interrupt.h>
#include <arch/barrier.h>
#include <arch/asm.h>
#include <arch/register.h>
#include <arch/types.h>
#include <arch/context.h>
#include <arch/stack.h>
#include <arch/mm/page.h>
#include <mm/as.h>
#include <config.h>
#include <userspace.h>
#include <console/console.h>
#include <proc/uarg.h>
#include <syscall/syscall.h>
#include <ddi/irq.h>
#include <ddi/device.h>
#include <arch/drivers/ega.h>
#include <arch/bootinfo.h>
#include <genarch/kbd/i8042.h>
#include <genarch/kbd/ns16550.h>
#include <smp/smp.h>
#include <smp/ipi.h>
#include <arch/atomic.h>
#include <panic.h>
#include <print.h>






#ifdef CONFIG_SMP


extern char cpu_by_id_eid_list[256][256];


static void sapic_init(void)
{
        bootinfo->sapic=(unative_t *)(PA2KA((unative_t)(bootinfo->sapic))|FW_OFFSET);
}



static void ipi_broadcast_arch_all(int ipi )
{
        int id,eid;
        int myid,myeid;
        
        myid=ia64_get_cpu_id();
        myeid=ia64_get_cpu_eid();

        
        for(id=0;id<256;id++)
                for(eid=0;eid<256;eid++)
                        if((id!=myid) || (eid!=myeid))
                                ipi_send_ipi(id,eid,ipi);
}

void ipi_broadcast_arch(int ipi )
{
        int id,eid;
        int myid,myeid;
        
        myid=ia64_get_cpu_id();
        myeid=ia64_get_cpu_eid();

        //printf("Sending ipi %d on %d\n",ipi,CPU->id);
        for(id=0;id<256;id++)
                for(eid=0;eid<256;eid++)
                        if((id!=myid) || (eid!=myeid))
                                if(cpu_by_id_eid_list[id][eid])
                                        ipi_send_ipi(id,eid,ipi);

}


void smp_init(void)
{
        sapic_init();
        ipi_broadcast_arch_all(bootinfo->wakeup_intno); 
        volatile long long brk;
        for(brk=0;brk<100LL*1024LL*1024LL;brk++); //wait a while before CPUs starts

        config.cpu_count=0;
        int id,eid;
        
        for(id=0;id<256;id++)
                for(eid=0;eid<256;eid++)
                        if(cpu_by_id_eid_list[id][eid]==1){
                                config.cpu_count++;
                                cpu_by_id_eid_list[id][eid]=2;

                        }
}


void kmp(void *arg __attribute__((unused)))
{
        int id,eid;
        int myid,myeid;
        
        myid=ia64_get_cpu_id();
        myeid=ia64_get_cpu_eid();

        for(id=0;id<256;id++)
                for(eid=0;eid<256;eid++)
                        if((id!=myid) || (eid!=myeid))
                                if(cpu_by_id_eid_list[id][eid]!=0){
                                        if(cpu_by_id_eid_list[id][eid]==1){
                                
                                                //config.cpu_count++;
                                                //cpu_by_id_eid_list[id][eid]=2;
                                                printf("Found Late CPU ID:%d EDI:%d Not added to system!!!\n",id,eid);
                                                continue;
                                                }
                                        cpu_by_id_eid_list[id][eid]=3;
                                        /*
                                         * There may be just one AP being initialized at
                                         * the time. After it comes completely up, it is
                                         * supposed to wake us up.
                                         */
                                        if (waitq_sleep_timeout(&ap_completion_wq, 1000000,
                                            SYNCH_FLAGS_NONE) == ESYNCH_TIMEOUT) {
                                                printf("%s: waiting for cpu ID:%d EID:%d"
                                                    "timed out\n", __FUNCTION__, 
                                                    id, eid);
                                            }    
                
                                }
}
#endif


/*This is just a hack for linking with assembler - may be removed in future*/
#ifndef CONFIG_SMP
void main_ap(void);
void main_ap(void)
{
        while(1);
}

#endif

/** @}
 */