FreeBSD/Linux Kernel Cross Reference
sys/powerpc/wii/platform_wii.c

     /*-
      * Copyright (C) 2012 Margarida Gouveia
      * 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,
     *    without modification, immediately at the beginning of the file.
     * 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: releng/10.1/sys/powerpc/wii/platform_wii.c 266020 2014-05-14 14:17:51Z ian $");
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/kernel.h>
    #include <sys/bus.h>
    #include <sys/pcpu.h>
    #include <sys/proc.h>
    #include <sys/reboot.h>
    #include <sys/smp.h>
    #include <sys/fbio.h>
    
    #include <vm/vm.h>
    #include <vm/pmap.h>
    
    #include <machine/bus.h>
    #include <machine/cpu.h>
    #include <machine/hid.h>
    #include <machine/platform.h>
    #include <machine/platformvar.h>
    #include <machine/pmap.h>
    #include <machine/smp.h>
    #include <machine/spr.h>
    #include <machine/vmparam.h>
    
    #include <powerpc/wii/wii_fbreg.h>
    #include <powerpc/wii/wii_ipcreg.h>
    
    #include "platform_if.h"
    
    static int              wii_probe(platform_t);
    static int              wii_attach(platform_t);
    static void             wii_mem_regions(platform_t, struct mem_region *,
                                int *, struct mem_region *, int *);
    static unsigned long    wii_timebase_freq(platform_t, struct cpuref *);
    static void             wii_reset(platform_t);
    static void             wii_cpu_idle(sbintime_t);
    
    extern void              wiibus_reset_system(void);
    
    static platform_method_t wii_methods[] = {
            PLATFORMMETHOD(platform_probe,          wii_probe),
            PLATFORMMETHOD(platform_attach,         wii_attach),
            PLATFORMMETHOD(platform_mem_regions,    wii_mem_regions),
            PLATFORMMETHOD(platform_timebase_freq,  wii_timebase_freq),
            PLATFORMMETHOD(platform_reset,          wii_reset),
     
            PLATFORMMETHOD_END
    };
    
    static platform_def_t wii_platform = {
            "wii",
            wii_methods,
            0
    };
    
    PLATFORM_DEF(wii_platform);
    
    static int
    wii_probe(platform_t plat)
    {
            register_t vers = mfpvr();
    
            /*
             * The Wii includes a PowerPC 750CL with custom modifications
             * ("Broadway").
             * For now, we just assume that if we are running on a
             * PowerPC 750CL, then this platform is a Nintendo Wii.
             */
            if ((vers & 0xfffff0e0) == (MPC750 << 16 | MPC750CL))
                    return (BUS_PROBE_SPECIFIC);
    
            return (ENXIO);
   }
   
   static int
   wii_attach(platform_t plat)
   {
           cpu_idle_hook = wii_cpu_idle;
   
           return (0);
   }
   
   static void
   wii_mem_regions(platform_t plat, struct mem_region *phys, int *physsz,
       struct mem_region *avail_regions, int *availsz)
   {
           /* 24MB 1T-SRAM */
           avail_regions[0].mr_start = 0x00000000;
           avail_regions[0].mr_size  = 0x01800000;
   
           /*
            * Reserve space for the framebuffer which is located
            * at the end of this 24MB memory region. See wii_fbreg.h.
            */
           avail_regions[0].mr_size -= WIIFB_FB_LEN;
   
           /* 64MB GDDR3 SDRAM */
           avail_regions[1].mr_start = 0x10000000;
           avail_regions[1].mr_size  = 0x04000000;
   
           /*
            * Reserve space for the DSP.
            */
           avail_regions[1].mr_start += 0x4000;
           avail_regions[1].mr_size -= 0x4000;
   
           /*
            * Reserve space for the IOS I/O memory.
            */
           avail_regions[1].mr_size -= WIIIPC_IOH_LEN + 1;
   
           memcpy(phys, avail_regions, 2*sizeof(*avail_regions));
           *physsz = *availsz = 2;
   }
   
   static u_long
   wii_timebase_freq(platform_t plat, struct cpuref *cpuref)
   {
           
           /* Bus Frequency (243MHz) / 4 */
           return (60750000);
   }
   
   static void
   wii_reset(platform_t plat __unused)
   {
   
           wiibus_reset_system();
   }
   
   static void
   wii_cpu_idle(sbintime_t sbt)
   {
   }

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