arch/ppc/boot/of1275/map.c

   1 /*
   2  * Copyright (C) Paul Mackerras 1997.
   3  * Copyright (C) Leigh Brown 2002.
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License
   7  * as published by the Free Software Foundation; either version
   8  * 2 of the License, or (at your option) any later version.
   9  */
  10
  11 #include "of1275.h"
  12 #include "nonstdio.h"
  13
  14 extern ihandle of_prom_mmu;
  15
  16 int
  17 map(unsigned int phys, unsigned int virt, unsigned int size)
  18 {
  19     struct prom_args {
  20         char *service;
  21         int nargs;
  22         int nret;
  23         char *method;
  24         ihandle mmu_ihandle;
  25         int misc;
  26         unsigned int size;
  27         unsigned int virt;
  28         unsigned int phys;
  29         int ret0;
  30     } args;
  31
  32     if (of_prom_mmu == 0) {
  33         printf("map() called, no MMU found\n");
  34         return -1;
  35     }
  36     args.service = "call-method";
  37     args.nargs = 6;
  38     args.nret = 1;
  39     args.method = "map";
  40     args.mmu_ihandle = of_prom_mmu;
  41     args.misc = 0;
  42     args.phys = phys;
  43     args.virt = virt;
  44     args.size = size;
  45     (*of_prom_entry)(&args);
  46
  47     return (int)args.ret0;
  48 }