FreeBSD/Linux Kernel Cross Reference
sys/arm/ti/omap4/omap4_mp.c

     /*-
      * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
      *
      * Copyright (c) 2012 Olivier Houchard.  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 ``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.
     */
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD$");
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/bus.h>
    #include <sys/lock.h>
    #include <sys/mutex.h>
    #include <sys/smp.h>
    
    #include <vm/vm.h>
    #include <vm/pmap.h>
    
    #include <machine/cpu.h>
    #include <machine/smp.h>
    #include <machine/fdt.h>
    #include <machine/intr.h>
    #include <machine/platformvar.h>
    
    #include <arm/ti/ti_smc.h>
    #include <arm/ti/omap4/omap4_machdep.h>
    #include <arm/ti/omap4/omap4_smc.h>
    
    void
    omap4_mp_setmaxid(platform_t plat)
    {
    
            if (mp_ncpus != 0)
                    return;
            mp_maxid = 1;
            mp_ncpus = 2;
    }
    
    void    
    omap4_mp_start_ap(platform_t plat)
    {
            bus_addr_t scu_addr;
    
            if (bus_space_map(fdtbus_bs_tag, 0x48240000, 0x1000, 0, &scu_addr) != 0)
                    panic("Couldn't map the SCU\n");
            /* Enable the SCU */
            *(volatile unsigned int *)scu_addr |= 1;
            //*(volatile unsigned int *)(scu_addr + 0x30) |= 1;
            dcache_wbinv_poc_all();
    
            ti_smc0(0x200, 0xfffffdff, MODIFY_AUX_CORE_0);
            ti_smc0(pmap_kextract((vm_offset_t)mpentry), 0, WRITE_AUX_CORE_1);
            dsb();
            sev();
            bus_space_unmap(fdtbus_bs_tag, scu_addr, 0x1000);
    }

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