FreeBSD/Linux Kernel Cross Reference
sys/arm64/arm64/autoconf.c

     /*-
      * Copyright (c) 2015 The FreeBSD Foundation
      * All rights reserved.
      *
      * This software was developed by Andrew Turner under
      * sponsorship from the FreeBSD Foundation.
      *
      * 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.
     *
     * 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.
     *
     */
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD: releng/11.2/sys/arm64/arm64/autoconf.c 305136 2016-08-31 17:36:43Z andrew $");
    
    /*
     * Setup the system to run on the current machine.
     *
     * Configure() is called at boot time and initializes the vba
     * device tables and the memory controller monitoring.  Available
     * devices are determined (from possibilities mentioned in ioconf.c),
     * and the drivers are initialized.
     */
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/bus.h>
    #include <sys/cons.h>
    #include <sys/kernel.h>
    
    #include <machine/intr.h>
    
    static void     configure_first(void *);
    static void     configure(void *);
    static void     configure_final(void *);
    
    SYSINIT(configure1, SI_SUB_CONFIGURE, SI_ORDER_FIRST, configure_first, NULL);
    /* SI_ORDER_SECOND is hookable */
    SYSINIT(configure2, SI_SUB_CONFIGURE, SI_ORDER_THIRD, configure, NULL);
    /* SI_ORDER_MIDDLE is hookable */
    SYSINIT(configure3, SI_SUB_CONFIGURE, SI_ORDER_ANY, configure_final, NULL);
    
    /*
     * Determine i/o configuration for a machine.
     */
    static void
    configure_first(void *dummy)
    {
    
            /* nexus0 is the top of the device tree */
            device_add_child(root_bus, "nexus", 0);
    }
    
    static void
    configure(void *dummy)
    {
    
            /* initialize new bus architecture */
            root_bus_configure();
    }
    
    static void
    configure_final(void *dummy)
    {
    
            /* Enable interrupt reception on this CPU */
            intr_enable();
            cninit_finish(); 
    
            if (bootverbose)
                    printf("Device configuration finished.\n");
    
            cold = 0;
    }

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