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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 <arch/mm/memory_init.h>
  30. #include <genarch/ofw/ofw.h>
  31. #include <panic.h>
  32. #include <mm/frame.h>
  33. #include <align.h>
  34.  
  35. #define MEMMAP_MAX_RECORDS 32
  36.  
  37. typedef struct {
  38.     __u32 start;
  39.     __u32 size;
  40. } memmap_t;
  41.  
  42. static memmap_t memmap[MEMMAP_MAX_RECORDS];
  43. size_t total_mem = 0;
  44.  
  45. static void init_memmap(void)
  46. {
  47.     int i;
  48.  
  49.     phandle handle = ofw_find_device("/memory");
  50.     if (handle == -1)
  51.         panic("No RAM\n");
  52.    
  53.     size_t ret = ofw_get_property(handle, "reg", &memmap, sizeof(memmap));
  54.     if (ret == -1)
  55.         panic("Device /memory has no reg property\n");
  56.    
  57.    
  58.     for (i = 0; i < MEMMAP_MAX_RECORDS; i++) {
  59.         if (memmap[i].size == 0)
  60.             break;
  61.         total_mem += memmap[i].size;
  62.     }
  63. }
  64.  
  65. void preboot_read_config(void)
  66. {
  67.     init_memmap();
  68. }
  69.  
  70. size_t get_memory_size(void)
  71. {
  72.     return total_mem;
  73. }
  74.  
  75. void ppc_init_zones(void)
  76. {
  77.     int i;
  78.     pfn_t confdata;
  79.  
  80.     for (i = 0; i < MEMMAP_MAX_RECORDS; i++) {
  81.         if (memmap[i].size == 0)
  82.             break;
  83.         confdata = ADDR2PFN(memmap[i].start);
  84.         if (confdata == 0)
  85.             confdata = 2;
  86.         zone_create(ADDR2PFN(memmap[i].start),
  87.                 SIZE2FRAMES(ALIGN_DOWN(memmap[i].size,PAGE_SIZE)),
  88.                 confdata, 0);
  89.     }
  90. }
  91.