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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.  /** @addtogroup genarch   
  30.  * @{
  31.  */
  32. /** @file
  33.  */
  34.  
  35. #include <genarch/ofw/memory_init.h>
  36. #include <genarch/ofw/ofw.h>
  37. #include <panic.h>
  38. #include <mm/frame.h>
  39. #include <align.h>
  40. #include <arch/types.h>
  41. #include <typedefs.h>
  42.  
  43. #define MEMMAP_MAX_RECORDS 32
  44.  
  45. typedef struct {
  46.     __address start;
  47.     size_t size;
  48. } memmap_t;
  49.  
  50. static memmap_t memmap[MEMMAP_MAX_RECORDS];
  51. size_t total_mem = 0;
  52.  
  53. void ofw_init_memmap(void)
  54. {
  55.     int i;
  56.     int ret;
  57.  
  58.     phandle handle = ofw_find_device("/memory");
  59.     if (handle == -1)
  60.         panic("No RAM\n");
  61.    
  62.     ret = ofw_get_property(handle, "reg", &memmap, sizeof(memmap));
  63.     if (ret == -1)
  64.         panic("Device /memory has no reg property\n");
  65.    
  66.    
  67.     for (i = 0; i < MEMMAP_MAX_RECORDS; i++) {
  68.         if (memmap[i].size == 0)
  69.             break;
  70.         total_mem += memmap[i].size;
  71.     }
  72. }
  73.  
  74. size_t ofw_get_memory_size(void)
  75. {
  76.     return total_mem;
  77. }
  78.  
  79. void ofw_init_zones(void)
  80. {
  81.     int i;
  82.     pfn_t confdata;
  83.  
  84.     for (i = 0; i < MEMMAP_MAX_RECORDS; i++) {
  85.         if (memmap[i].size == 0)
  86.             break;
  87.         confdata = ADDR2PFN(memmap[i].start);
  88.         if (confdata == 0)
  89.             confdata = 2;
  90.         zone_create(ADDR2PFN(memmap[i].start),
  91.                 SIZE2FRAMES(ALIGN_DOWN(memmap[i].size,PAGE_SIZE)),
  92.                 confdata, 0);
  93.     }
  94. }
  95.  
  96.  /** @}
  97.  */
  98.  
  99.