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 #include <sys/cdefs.h>
   35 __FBSDID("$FreeBSD: releng/5.2/sys/powerpc/powerpc/ofw_machdep.c 115614 2003-06-01 09:25:17Z phk $");
   36 
   37 #include <sys/param.h>
   38 #include <sys/bus.h>
   39 #include <sys/systm.h>
   40 #include <sys/conf.h>
   41 #include <sys/disk.h>
   42 #include <sys/fcntl.h>
   43 #include <sys/malloc.h>
   44 #include <sys/stat.h>
   45 
   46 #include <net/ethernet.h>
   47 
   48 #include <dev/ofw/openfirm.h>
   49 
   50 #include <vm/vm.h>
   51 #include <vm/vm_param.h>
   52 #include <vm/vm_page.h>
   53 
   54 #include <machine/powerpc.h>
   55 #include <machine/ofw_machdep.h>
   56 #include <powerpc/ofw/ofw_pci.h>
   57 
   58 #define OFMEM_REGIONS   32
   59 static struct mem_region OFmem[OFMEM_REGIONS + 1], OFavail[OFMEM_REGIONS + 3];
   60 
   61 extern long     ofmsr;
   62 extern struct   pmap ofw_pmap;
   63 extern int      pmap_bootstrapped;
   64 static int      (*ofwcall)(void *);
   65 
   66 /*
   67  * This is called during powerpc_init, before the system is really initialized.
   68  * It shall provide the total and the available regions of RAM.
   69  * Both lists must have a zero-size entry as terminator.
   70  * The available regions need not take the kernel into account, but needs
   71  * to provide space for two additional entry beyond the terminating one.
   72  */
   73 void
   74 mem_regions(struct mem_region **memp, int *memsz,
   75                 struct mem_region **availp, int *availsz)
   76 {
   77         int phandle;
   78         int asz, msz; 
   79         
   80         /*
   81          * Get memory.
   82          */
   83         if ((phandle = OF_finddevice("/memory")) == -1
   84             || (msz = OF_getprop(phandle, "reg",
   85                           OFmem, sizeof OFmem[0] * OFMEM_REGIONS))
   86                <= 0
   87             || (asz = OF_getprop(phandle, "available",
   88                           OFavail, sizeof OFavail[0] * OFMEM_REGIONS))
   89                <= 0)
   90                 panic("no memory?");
   91         *memp = OFmem;
   92         *memsz = msz / sizeof(struct mem_region);
   93         *availp = OFavail;
   94         *availsz = asz / sizeof(struct mem_region);
   95 }
   96 
   97 void
   98 set_openfirm_callback(int (*openfirm)(void *))
   99 {
  100 
  101         ofwcall = openfirm;
  102 }
  103 
  104 int
  105 openfirmware(void *args)
  106 {
  107         long    oldmsr;
  108         int     result;
  109         u_int   srsave[16];
  110         u_int   i;
  111 
  112         __asm __volatile(       "\t"
  113                 "sync\n\t"
  114                 "mfmsr  %0\n\t"
  115                 "mtmsr  %1\n\t"
  116                 "isync\n"
  117                 : "=r" (oldmsr)
  118                 : "r" (ofmsr)
  119         );
  120 
  121         if (pmap_bootstrapped) {
  122                 /*
  123                  * Swap the kernel's address space with OpenFirmware's
  124                  */
  125                 for (i = 0; i < 16; i++) {
  126                         srsave[i] = mfsrin(i << ADDR_SR_SHFT);
  127                         mtsrin(i << ADDR_SR_SHFT, ofw_pmap.pm_sr[i]);
  128                 }
  129 
  130                 /*
  131                  * Clear battable[] translations
  132                  */
  133                 __asm __volatile("mtdbatu 2, %0\n"
  134                                  "mtdbatu 3, %0" : : "r" (0));
  135                 isync();
  136         }
  137         
  138         result = ofwcall(args);
  139 
  140         if (pmap_bootstrapped) {
  141                 /*
  142                  * Restore the kernel's addr space. The isync() doesn;t
  143                  * work outside the loop unless mtsrin() is open-coded
  144                  * in an asm statement :(
  145                  */
  146                 for (i = 0; i < 16; i++) {
  147                         mtsrin(i << ADDR_SR_SHFT, srsave[i]);
  148                         isync();
  149                 }
  150         }
  151 
  152         __asm(  "\t"
  153                 "mtmsr  %0\n\t"
  154                 "isync\n"
  155                 : : "r" (oldmsr)
  156         );
  157 
  158         return (result);
  159 }
  160 
  161 void
  162 ppc_exit()
  163 {
  164 
  165         OF_exit();
  166 }
  167 
  168 void
  169 ppc_boot(str)
  170         char *str;
  171 {
  172 
  173         OF_boot(str);
  174 }
  175 
  176 void
  177 OF_getetheraddr(device_t dev, u_char *addr)
  178 {
  179         phandle_t       node;
  180 
  181         node = ofw_pci_find_node(dev);
  182         OF_getprop(node, "local-mac-address", addr, ETHER_ADDR_LEN);
  183 }

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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