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  1. /*
  2.  * Copyright (c) 2005 Martin Decky
  3.  * Copyright (c) 2006 Jakub Jermar
  4.  * All rights reserved.
  5.  *
  6.  * Redistribution and use in source and binary forms, with or without
  7.  * modification, are permitted provided that the following conditions
  8.  * are met:
  9.  *
  10.  * - Redistributions of source code must retain the above copyright
  11.  *   notice, this list of conditions and the following disclaimer.
  12.  * - Redistributions in binary form must reproduce the above copyright
  13.  *   notice, this list of conditions and the following disclaimer in the
  14.  *   documentation and/or other materials provided with the distribution.
  15.  * - The name of the author may not be used to endorse or promote products
  16.  *   derived from this software without specific prior written permission.
  17.  *
  18.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  19.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  20.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  21.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  22.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  23.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  24.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  25.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  26.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  27.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28.  */
  29.  
  30. /**
  31.  * @file
  32.  * @brief   Architecture dependent parts of OpenFirmware interface.
  33.  */
  34.  
  35. #include <ofwarch.h>  
  36. #include <ofw.h>
  37. #include <printf.h>
  38. #include <string.h>
  39. #include <register.h>
  40. #include "main.h"
  41. #include "asm.h"
  42.  
  43. extern uint8_t subarchitecture;
  44.  
  45. void write(const char *str, const int len)
  46. {
  47.     int i;
  48.    
  49.     for (i = 0; i < len; i++) {
  50.         if (str[i] == '\n')
  51.             ofw_write("\r", 1);
  52.         ofw_write(&str[i], 1);
  53.     }
  54. }
  55.  
  56. int ofw_translate_failed(ofw_arg_t flag)
  57. {
  58.     return flag != -1;
  59. }
  60.  
  61. /**
  62.  * Starts all CPUs represented by following siblings of the given node,
  63.  * except for the current CPU.
  64.  *
  65.  * @param child the first child of the OFW tree node whose children represent
  66.  *      CPUs to be woken up
  67.  * @param current_mid   MID of the current CPU, the current CPU will
  68.  *          (of course) not be woken up
  69.  * @return  number of CPUs which have the same parent node as "child"
  70.  */
  71. static int wake_cpus_in_node(phandle child, uint64_t current_mid)
  72. {
  73.     int cpus;
  74.     char type_name[BUF_SIZE];
  75.    
  76.     for (cpus = 0; child != 0 && child != -1;
  77.         child = ofw_get_peer_node(child), cpus++) {
  78.         if (ofw_get_property(child, "device_type", type_name,
  79.             sizeof(type_name)) > 0) {
  80.             if (strcmp(type_name, "cpu") == 0) {
  81.                 uint32_t mid;
  82.                
  83.                 /*
  84.                  * "upa-portid" for US, "portid" for US-III,
  85.                  * "cpuid" for US-IV*
  86.                  */
  87.                 if (ofw_get_property(
  88.                     child, "upa-portid",
  89.                     &mid, sizeof(mid)) <= 0
  90.                     && ofw_get_property(child, "portid",
  91.                     &mid, sizeof(mid)) <= 0
  92.                     && ofw_get_property(child, "cpuid",
  93.                     &mid, sizeof(mid)) <= 0)
  94.                     continue;
  95.                    
  96.                 if (current_mid != mid) {
  97.                     /*
  98.                      * Start secondary processor.
  99.                      */
  100.                     (void) ofw_call("SUNW,start-cpu", 3, 1,
  101.                         NULL, child, KERNEL_VIRTUAL_ADDRESS,
  102.                         bootinfo.physmem_start |
  103.                         AP_PROCESSOR);
  104.                 }
  105.             }
  106.         }
  107.     }
  108.  
  109.     return cpus;
  110. }
  111.  
  112. /**
  113.  * Finds out the current CPU's MID and wakes up all AP processors.
  114.  */
  115. int ofw_cpu(void)
  116. {
  117.     int cpus;
  118.     phandle node;
  119.     phandle subnode;
  120.     phandle cpus_parent;
  121.     phandle cmp;
  122.     char name[BUF_SIZE];
  123.  
  124.     /* get the current CPU MID */
  125.     uint64_t current_mid;
  126.    
  127.     asm volatile ("ldxa [%1] %2, %0\n"
  128.         : "=r" (current_mid)
  129.         : "r" (0), "i" (ASI_ICBUS_CONFIG));
  130.     current_mid >>= ICBUS_CONFIG_MID_SHIFT;
  131.  
  132.     if (subarchitecture == SUBARCH_US) {
  133.         current_mid &= ICBUS_CONFIG_MID_MASK_US;
  134.     } else if (subarchitecture == SUBARCH_US3) {
  135.         current_mid &= ICBUS_CONFIG_MID_MASK_US3;
  136.     } else {
  137.         printf("MID format unknown for this subarchitecture.");
  138.         return 0;
  139.     }
  140.  
  141.     /* wake up CPUs */
  142.    
  143.     cpus_parent = ofw_find_device("/ssm@0,0");
  144.     if (cpus_parent == 0 || cpus_parent == -1) {
  145.         cpus_parent = ofw_find_device("/");
  146.     }
  147.  
  148.     node = ofw_get_child_node(cpus_parent);
  149.     cpus = wake_cpus_in_node(node, current_mid);
  150.     while (node != 0 && node != -1) {
  151.         if (ofw_get_property(node, "name", name,
  152.             sizeof(name)) > 0) {
  153.             if (strcmp(name, "cmp") == 0) {
  154.                 subnode = ofw_get_child_node(node);
  155.                 cpus += wake_cpus_in_node(subnode,
  156.                     current_mid);
  157.             }
  158.         }
  159.         node = ofw_get_peer_node(node);
  160.     }
  161.    
  162.     return cpus;
  163.    
  164. }
  165.  
  166. /** Get physical memory starting address.
  167.  *
  168.  * @param start Pointer to variable where the physical memory starting
  169.  *      address will be stored.
  170.  *
  171.  * @return Non-zero on succes, zero on failure.
  172.  */
  173. int ofw_get_physmem_start(uintptr_t *start)
  174. {
  175.     uint32_t memreg[4];
  176.  
  177.     if (ofw_get_property(ofw_memory, "reg", &memreg, sizeof(memreg)) <= 0)
  178.         return 0;
  179.  
  180.     *start = (((uint64_t) memreg[0]) << 32) | memreg[1];
  181.     return 1;
  182. }
  183.  
  184.