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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. /**
  30.  * @file
  31.  * @brief   Architecture dependent parts of OpenFirmware interface.
  32.  */
  33.  
  34. #include <ofwarch.h>  
  35. #include <ofw.h>
  36. #include <printf.h>
  37. #include <string.h>
  38. #include "main.h"
  39.  
  40. void write(const char *str, const int len)
  41. {
  42.     int i;
  43.    
  44.     for (i = 0; i < len; i++) {
  45.         if (str[i] == '\n')
  46.             ofw_write("\r", 1);
  47.         ofw_write(&str[i], 1);
  48.     }
  49. }
  50.  
  51. int ofw_translate_failed(ofw_arg_t flag)
  52. {
  53.     return flag != -1;
  54. }
  55.  
  56.  
  57. #define ASI_UPA_CONFIG      0x4a
  58. #define UPA_CONFIG_MID_SHIFT    17
  59. #define UPA_CONFIG_MID_MASK 0x1f
  60.  
  61. int ofw_cpu(void)
  62. {
  63.     char type_name[BUF_SIZE];
  64.  
  65.     phandle node;
  66.     node = ofw_get_child_node(ofw_root);
  67.     if (node == 0 || node == -1) {
  68.         printf("Could not find any child nodes of the root node.\n");
  69.         return 0;
  70.     }
  71.    
  72.     uint64_t current_mid;
  73.    
  74.     __asm__ volatile ("ldxa [%1] %2, %0\n" : "=r" (current_mid) : "r" (0), "i" (ASI_UPA_CONFIG));
  75.     current_mid >>= UPA_CONFIG_MID_SHIFT;
  76.     current_mid &= UPA_CONFIG_MID_MASK;
  77.    
  78.     for (; node != 0 && node != -1; node = ofw_get_peer_node(node)) {
  79.         if (ofw_get_property(node, "device_type", type_name, sizeof(type_name)) > 0) {
  80.             if (strcmp(type_name, "cpu") == 0) {
  81.                 uint32_t mid;
  82.                
  83.                 if (ofw_get_property(node, "upa-portid", &mid, sizeof(mid)) <= 0)
  84.                     continue;
  85.                    
  86.                 if (current_mid != mid) {
  87.                     /*
  88.                      * Start secondary processor.
  89.                      */
  90.                     (void) ofw_call("SUNW,start-cpu", 3, 1, NULL, node, KERNEL_VIRTUAL_ADDRESS, 0);
  91.                 }
  92.             }
  93.         }
  94.     }
  95.  
  96.     return 1;
  97. }
  98.