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  1. /*
  2.  * Copyright (C) 2005 Martin Decky
  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.  *
  9.  * - Redistributions of source code must retain the above copyright
  10.  *   notice, this list of conditions and the following disclaimer.
  11.  * - 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.  * - The name of the author may not be used to endorse or promote products
  15.  *   derived from this software without specific prior written permission.
  16.  *
  17.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27.  */
  28.  
  29. #include <genarch/ofw/memory_init.h>
  30. #include <genarch/ofw/ofw.h>
  31. #include <panic.h>
  32. #include <mm/frame.h>
  33. #include <align.h>
  34. #include <arch/types.h>
  35. #include <typedefs.h>
  36.  
  37. #define MEMMAP_MAX_RECORDS 32
  38.  
  39. typedef struct {
  40.     __address start;
  41.     size_t size;
  42. } memmap_t;
  43.  
  44. static memmap_t memmap[MEMMAP_MAX_RECORDS];
  45. size_t total_mem = 0;
  46.  
  47. void ofw_init_memmap(void)
  48. {
  49.     int i;
  50.     int ret;
  51.  
  52.     phandle handle = ofw_find_device("/memory");
  53.     if (handle == -1)
  54.         panic("No RAM\n");
  55.    
  56.     ret = ofw_get_property(handle, "reg", &memmap, sizeof(memmap));
  57.     if (ret == -1)
  58.         panic("Device /memory has no reg property\n");
  59.    
  60.    
  61.     for (i = 0; i < MEMMAP_MAX_RECORDS; i++) {
  62.         if (memmap[i].size == 0)
  63.             break;
  64.         total_mem += memmap[i].size;
  65.     }
  66. }
  67.  
  68. size_t ofw_get_memory_size(void)
  69. {
  70.     return total_mem;
  71. }
  72.  
  73. void ofw_init_zones(void)
  74. {
  75.     int i;
  76.     pfn_t confdata;
  77.  
  78.     for (i = 0; i < MEMMAP_MAX_RECORDS; i++) {
  79.         if (memmap[i].size == 0)
  80.             break;
  81.         confdata = ADDR2PFN(memmap[i].start);
  82.         if (confdata == 0)
  83.             confdata = 2;
  84.         zone_create(ADDR2PFN(memmap[i].start),
  85.                 SIZE2FRAMES(ALIGN_DOWN(memmap[i].size,PAGE_SIZE)),
  86.                 confdata, 0);
  87.     }
  88. }
  89.