FreeBSD/Linux Kernel Cross Reference
sys/arm/broadcom/bcm2835/bcm2835_machdep.c

     /*-
      * SPDX-License-Identifier: BSD-4-Clause
      *
      * Copyright (c) 2012 Oleksandr Tymoshenko.
      * Copyright (c) 1994-1998 Mark Brinicombe.
      * Copyright (c) 1994 Brini.
      * All rights reserved.
      *
      * This code is derived from software written for Brini by Mark Brinicombe
     *
     * 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.
     * 3. All advertising materials mentioning features or use of this software
     *    must display the following acknowledgement:
     *      This product includes software developed by Brini.
     * 4. The name of the company nor the name of the author may be used to
     *    endorse or promote products derived from this software without specific
     *    prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY BRINI ``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 BRINI 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.
     *
     * from: FreeBSD: //depot/projects/arm/src/sys/arm/at91/kb920x_machdep.c, rev 45
     */
    
    #include "opt_ddb.h"
    #include "opt_platform.h"
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD$");
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/bus.h>
    #include <sys/devmap.h>
    
    #include <vm/vm.h>
    #include <vm/pmap.h>
    
    #include <machine/bus.h>
    #include <machine/machdep.h>
    #include <machine/platform.h>
    #include <machine/platformvar.h>
    
    #include <dev/ofw/openfirm.h>
    
    #include <arm/broadcom/bcm2835/bcm2835_wdog.h>
    #include <arm/broadcom/bcm2835/bcm2836_mp.h>
    
    #include "platform_if.h"
    
    #ifdef SOC_BCM2835
    static platform_devmap_init_t bcm2835_devmap_init;
    #endif
    #ifdef SOC_BCM2836
    static platform_devmap_init_t bcm2836_devmap_init;
    #endif
    static platform_late_init_t bcm2835_late_init;
    static platform_cpu_reset_t bcm2835_cpu_reset;
    
    static void
    bcm2835_late_init(platform_t plat)
    {
            phandle_t system;
            pcell_t cells[2];
            int len;
    
            system = OF_finddevice("/system");
            if (system != -1) {
                    len = OF_getencprop(system, "linux,serial", cells,
                        sizeof(cells));
                    if (len > 0)
                            board_set_serial(((uint64_t)cells[0]) << 32 | cells[1]);
    
                    len = OF_getencprop(system, "linux,revision", cells,
                        sizeof(cells));
                    if (len > 0)
                            board_set_revision(cells[0]);
            }
    }
    
    #ifdef SOC_BCM2835
    /*
     * Set up static device mappings.
    * All on-chip peripherals exist in a 16MB range starting at 0x20000000.
    * Map the entire range using 1MB section mappings.
    */
   static int
   bcm2835_devmap_init(platform_t plat)
   {
   
           devmap_add_entry(0x20000000, 0x01000000);
           return (0);
   }
   #endif
   
   #ifdef SOC_BCM2836
   static int
   bcm2836_devmap_init(platform_t plat)
   {
   
           devmap_add_entry(0x3f000000, 0x01000000);
           return (0);
   }
   #endif
   
   static void
   bcm2835_cpu_reset(platform_t plat)
   {
           bcmwd_watchdog_reset();
   }
   
   #ifdef SOC_BCM2835
   static platform_method_t bcm2835_methods[] = {
           PLATFORMMETHOD(platform_devmap_init,    bcm2835_devmap_init),
           PLATFORMMETHOD(platform_late_init,      bcm2835_late_init),
           PLATFORMMETHOD(platform_cpu_reset,      bcm2835_cpu_reset),
   
           PLATFORMMETHOD_END,
   };
   FDT_PLATFORM_DEF2(bcm2835, bcm2835_legacy, "bcm2835 (legacy)", 0, "raspberrypi,model-b", 100);
   FDT_PLATFORM_DEF2(bcm2835, bcm2835, "bcm2835", 0, "brcm,bcm2835", 100);
   #endif
   
   #if defined(SOC_BCM2836) || defined(SOC_BRCM_BCM2837)
   static platform_method_t bcm2836_methods[] = {
           PLATFORMMETHOD(platform_devmap_init,    bcm2836_devmap_init),
           PLATFORMMETHOD(platform_late_init,      bcm2835_late_init),
           PLATFORMMETHOD(platform_cpu_reset,      bcm2835_cpu_reset),
   
   #ifdef SMP
           PLATFORMMETHOD(platform_mp_start_ap,    bcm2836_mp_start_ap),
           PLATFORMMETHOD(platform_mp_setmaxid,    bcm2836_mp_setmaxid),
   #endif
   
           PLATFORMMETHOD_END,
   };
   FDT_PLATFORM_DEF2(bcm2836, bcm2836_legacy, "bcm2836 (legacy)", 0, "brcm,bcm2709", 100);
   FDT_PLATFORM_DEF2(bcm2836, bcm2836, "bcm2836", 0, "brcm,bcm2836", 100);
   FDT_PLATFORM_DEF2(bcm2836, bcm2837, "bcm2837", 0, "brcm,bcm2837", 100);
   #endif  /* defined(SOC_BCM2836) || defined(SOC_BRCM_BCM2837) */

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