FreeBSD/Linux Kernel Cross Reference
sys/dev/fdt/fdt_arm_platform.c

     /*-
      * Copyright (c) 2013 Andrew Turner
      * All rights reserved.
      *
      * 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 "opt_platform.h"
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD$");
    
    #include <sys/param.h>
    #include <sys/smp.h>
    
    #include <arm/include/platform.h>
    #include <arm/include/platformvar.h>
    
    #include <dev/ofw/openfirm.h>
    #include <dev/ofw/ofw_bus_subr.h>
    #include <dev/ofw/ofw_cpu.h>
    #include <dev/fdt/fdt_common.h>
    
    #include "platform_if.h"
    
    #define FDT_PLATFORM(plat)      \
        ((fdt_platform_def_t *)(plat)->cls->baseclasses[0])
    
    #if defined(SMP)
    static platform_mp_setmaxid_t fdt_platform_mp_setmaxid;
    #endif
    
    static int
    fdt_platform_probe(platform_t plat)
    {
            const char *compat;
            phandle_t root;
    
            /*
             * TODO: Make these KASSERTs, we should only be here if we
             * are using the FDT platform magic.
             */
            if (plat->cls == NULL || FDT_PLATFORM(plat) == NULL)
                    return 1;
    
            /* Is the device is compatible? */
            root = OF_finddevice("/");
            compat = FDT_PLATFORM(plat)->fdt_compatible;
            if (ofw_bus_node_is_compatible(root, compat) != 0)
                    return 0;
    
            /* Not compatible, return an error */
            return 1;
    }
    
    #if defined(SMP)
    static boolean_t
    fdt_platform_maxid(u_int id, phandle_t node, u_int addr_cells, pcell_t *reg)
    {
    
            if (mp_maxid < id)
                    mp_maxid = id;
    
            return (true);
    }
    
    static void
    fdt_platform_mp_setmaxid(platform_t plat)
    {
    
            mp_maxid = PCPU_GET(cpuid);
            mp_ncpus = ofw_cpu_early_foreach(fdt_platform_maxid, true);
            if (mp_ncpus < 1)
                    mp_ncpus = 1;
            mp_ncpus = MIN(mp_ncpus, MAXCPU);
    }
    #endif
    
    platform_method_t fdt_platform_methods[] = {
            PLATFORMMETHOD(platform_probe,  fdt_platform_probe),
   
   #if defined(SMP)
           PLATFORMMETHOD(platform_mp_setmaxid, fdt_platform_mp_setmaxid),
   #endif
   
           PLATFORMMETHOD_END
   };
   

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