ofw_machdep.c

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    1 /*
    2  * Copyright (C) 1996 Wolfgang Solfrank.
    3  * Copyright (C) 1996 TooLs GmbH.
    4  * All rights reserved.
    5  *
    6  * Redistribution and use in source and binary forms, with or without
    7  * modification, are permitted provided that the following conditions
    8  * are met:
    9  * 1. Redistributions of source code must retain the above copyright
   10  *    notice, this list of conditions and the following disclaimer.
   11  * 2. Redistributions in binary form must reproduce the above copyright
   12  *    notice, this list of conditions and the following disclaimer in the
   13  *    documentation and/or other materials provided with the distribution.
   14  * 3. All advertising materials mentioning features or use of this software
   15  *    must display the following acknowledgement:
   16  *      This product includes software developed by TooLs GmbH.
   17  * 4. The name of TooLs GmbH may not be used to endorse or promote products
   18  *    derived from this software without specific prior written permission.
   19  *
   20  * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
   21  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   22  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   23  * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   24  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
   25  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
   26  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
   27  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
   28  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
   29  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   30  *
   31  * $NetBSD: ofw_machdep.c,v 1.5 2000/05/23 13:25:43 tsubai Exp $
   32  */
   33 
   34 #ifndef lint
   35 static const char rcsid[] =
   36   "$FreeBSD: releng/5.0/sys/powerpc/powerpc/ofw_machdep.c 103602 2002-09-19 04:31:39Z grehan $";
   37 #endif /* not lint */
   38 
   39 #include <sys/param.h>
   40 #include <sys/bus.h>
   41 #include <sys/systm.h>
   42 #include <sys/conf.h>
   43 #include <sys/disk.h>
   44 #include <sys/disklabel.h>
   45 #include <sys/fcntl.h>
   46 #include <sys/malloc.h>
   47 #include <sys/stat.h>
   48 
   49 #include <net/ethernet.h>
   50 
   51 #include <dev/ofw/openfirm.h>
   52 
   53 #include <vm/vm.h>
   54 #include <vm/vm_param.h>
   55 #include <vm/vm_page.h>
   56 
   57 #include <machine/powerpc.h>
   58 #include <machine/ofw_machdep.h>
   59 #include <powerpc/ofw/ofw_pci.h>
   60 
   61 #define OFMEM_REGIONS   32
   62 static struct mem_region OFmem[OFMEM_REGIONS + 1], OFavail[OFMEM_REGIONS + 3];
   63 
   64 extern long     ofmsr;
   65 extern struct   pmap ofw_pmap;
   66 extern int      pmap_bootstrapped;
   67 static int      (*ofwcall)(void *);
   68 
   69 /*
   70  * This is called during powerpc_init, before the system is really initialized.
   71  * It shall provide the total and the available regions of RAM.
   72  * Both lists must have a zero-size entry as terminator.
   73  * The available regions need not take the kernel into account, but needs
   74  * to provide space for two additional entry beyond the terminating one.
   75  */
   76 void
   77 mem_regions(struct mem_region **memp, int *memsz,
   78                 struct mem_region **availp, int *availsz)
   79 {
   80         int phandle;
   81         int asz, msz; 
   82         
   83         /*
   84          * Get memory.
   85          */
   86         if ((phandle = OF_finddevice("/memory")) == -1
   87             || (msz = OF_getprop(phandle, "reg",
   88                           OFmem, sizeof OFmem[0] * OFMEM_REGIONS))
   89                <= 0
   90             || (asz = OF_getprop(phandle, "available",
   91                           OFavail, sizeof OFavail[0] * OFMEM_REGIONS))
   92                <= 0)
   93                 panic("no memory?");
   94         *memp = OFmem;
   95         *memsz = msz / sizeof(struct mem_region);
   96         *availp = OFavail;
   97         *availsz = asz / sizeof(struct mem_region);
   98 }
   99 
  100 void
  101 set_openfirm_callback(int (*openfirm)(void *))
  102 {
  103 
  104         ofwcall = openfirm;
  105 }
  106 
  107 int
  108 openfirmware(void *args)
  109 {
  110         long    oldmsr;
  111         int     result;
  112         u_int   srsave[16];
  113         u_int   i;
  114 
  115         __asm __volatile(       "\t"
  116                 "sync\n\t"
  117                 "mfmsr  %0\n\t"
  118                 "mtmsr  %1\n\t"
  119                 "isync\n"
  120                 : "=r" (oldmsr)
  121                 : "r" (ofmsr)
  122         );
  123 
  124         if (pmap_bootstrapped) {
  125                 /*
  126                  * Swap the kernel's address space with OpenFirmware's
  127                  */
  128                 for (i = 0; i < 16; i++) {
  129                         srsave[i] = mfsrin(i << ADDR_SR_SHFT);
  130                         mtsrin(i << ADDR_SR_SHFT, ofw_pmap.pm_sr[i]);
  131                 }
  132 
  133                 /*
  134                  * Clear battable[] translations
  135                  */
  136                 __asm __volatile("mtdbatu 2, %0\n"
  137                                  "mtdbatu 3, %0" : : "r" (0));
  138                 isync();
  139         }
  140         
  141         result = ofwcall(args);
  142 
  143         if (pmap_bootstrapped) {
  144                 /*
  145                  * Restore the kernel's addr space. The isync() doesn;t
  146                  * work outside the loop unless mtsrin() is open-coded
  147                  * in an asm statement :(
  148                  */
  149                 for (i = 0; i < 16; i++) {
  150                         mtsrin(i << ADDR_SR_SHFT, srsave[i]);
  151                         isync();
  152                 }
  153         }
  154 
  155         __asm(  "\t"
  156                 "mtmsr  %0\n\t"
  157                 "isync\n"
  158                 : : "r" (oldmsr)
  159         );
  160 
  161         return (result);
  162 }
  163 
  164 void
  165 ppc_exit()
  166 {
  167 
  168         OF_exit();
  169 }
  170 
  171 void
  172 ppc_boot(str)
  173         char *str;
  174 {
  175 
  176         OF_boot(str);
  177 }
  178 
  179 void
  180 OF_getetheraddr(device_t dev, u_char *addr)
  181 {
  182         phandle_t       node;
  183 
  184         node = ofw_pci_find_node(dev);
  185         OF_getprop(node, "local-mac-address", addr, ETHER_ADDR_LEN);
  186 }

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FreeBSD/Linux Kernel Cross Reference sys/powerpc/powerpc/ofw_machdep.c

FreeBSD/Linux Kernel Cross Reference
sys/powerpc/powerpc/ofw_machdep.c