bcm_mipscore.c

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    1 /*-
    2  * Copyright (c) 2016 Michael Zhilin <mizhka@gmail.com>
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer,
   10  *    without modification.
   11  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
   12  *    similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
   13  *    redistribution must be conditioned upon including a substantially
   14  *    similar Disclaimer requirement for further binary redistribution.
   15  *
   16  * NO WARRANTY
   17  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   18  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   19  * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
   20  * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
   21  * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
   22  * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   23  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   24  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
   25  * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   26  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
   27  * THE POSSIBILITY OF SUCH DAMAGES.
   28  */
   29 
   30 #include <sys/cdefs.h>
   31 __FBSDID("$FreeBSD: releng/11.2/sys/mips/broadcom/bcm_mipscore.c 301698 2016-06-08 21:38:51Z landonf $");
   32 
   33 #include <sys/param.h>
   34 #include <sys/kernel.h>
   35 #include <sys/bus.h>
   36 #include <sys/module.h>
   37 #include <sys/systm.h>
   38 #include <sys/errno.h>
   39 #include <sys/rman.h>
   40 #include <sys/stddef.h>
   41 
   42 #include <machine/bus.h>
   43 #include <machine/resource.h>
   44 
   45 #include <dev/bhnd/bhnd.h>
   46 #include <dev/bhnd/bhndvar.h>
   47 #include <dev/bhnd/bhnd_ids.h>
   48 
   49 #include "bcm_mipscore.h"
   50 
   51 static const struct resource_spec mipscore_rspec[MIPSCORE_MAX_RSPEC] = {
   52         { SYS_RES_MEMORY,       0,      RF_ACTIVE },
   53         { -1, -1, 0 }
   54 };
   55 
   56 #define MIPSCORE_DEV(_vendor, _core)    \
   57         BHND_DEVICE(_vendor, _core, NULL, NULL, BHND_DF_SOC)
   58 
   59 struct bhnd_device mipscore_match[] = {
   60         MIPSCORE_DEV(BCM, MIPS),
   61         MIPSCORE_DEV(BCM, MIPS33),
   62         MIPSCORE_DEV(MIPS, MIPS74K),
   63         BHND_DEVICE_END
   64 };
   65 
   66 static int
   67 mipscore_probe(device_t dev)
   68 {
   69         const struct bhnd_device *id;
   70 
   71         id = bhnd_device_lookup(dev, mipscore_match, sizeof(mipscore_match[0]));
   72         if (id == NULL)
   73                 return (ENXIO);
   74 
   75         bhnd_set_default_core_desc(dev);
   76         return (BUS_PROBE_DEFAULT);
   77 }
   78 
   79 static int
   80 mipscore_attach(device_t dev)
   81 {
   82         struct mipscore_softc   *sc;
   83         struct resource         *res;
   84         uint32_t                 intmask;
   85         uint16_t                 devid;
   86         int                      error;
   87 
   88         sc = device_get_softc(dev);
   89         devid = bhnd_get_device(dev);
   90 
   91         sc->devid = devid;
   92         sc->dev = dev;
   93 
   94         /* Allocate bus resources */
   95         memcpy(sc->rspec, mipscore_rspec, sizeof(sc->rspec));
   96         error = bhnd_alloc_resources(dev, sc->rspec, sc->res);
   97         if (error)
   98                 return (error);
   99 
  100         res = sc->res[0]->res;
  101         if (res == NULL)
  102                 return (ENXIO);
  103 
  104         if (devid == BHND_COREID_MIPS74K) {
  105                 intmask = (1 << 31);
  106                 /* Use intmask5 register to route the timer interrupt */
  107                 bus_write_4(res, offsetof(struct mipscore_regs, intmask[5]),
  108                                 intmask);
  109         }
  110 
  111         return (0);
  112 }
  113 
  114 static device_method_t mipscore_methods[] = {
  115                 DEVMETHOD(device_probe,         mipscore_probe),
  116                 DEVMETHOD(device_attach,        mipscore_attach),
  117                 DEVMETHOD_END
  118 };
  119 
  120 devclass_t bhnd_mipscore_devclass;
  121 
  122 DEFINE_CLASS_0(bhnd_mips, mipscore_driver, mipscore_methods,
  123     sizeof(struct mipscore_softc));
  124 EARLY_DRIVER_MODULE(bhnd_mips, bhnd, mipscore_driver,
  125     bhnd_mipscore_devclass, 0, 0, BUS_PASS_CPU + BUS_PASS_ORDER_EARLY);
  126 MODULE_VERSION(bhnd_mips, 1);

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FreeBSD/Linux Kernel Cross Reference sys/mips/broadcom/bcm_mipscore.c

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sys/mips/broadcom/bcm_mipscore.c