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  1.  /*
  2.  * Copyright (C) 2001-2004 Jakub Jermar
  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. /** @defgroup cpu CPU
  30.  * @ingroup kernel
  31.  * @{
  32.  * @}
  33.  */
  34.  
  35.  /** @addtogroup genericcpu generic
  36.  * @ingroup cpu
  37.  * @{
  38.  */
  39.  
  40. /**
  41.  * @file
  42.  * @brief   CPU subsystem initialization and listing.
  43.  */
  44.  
  45. #include <cpu.h>
  46. #include <arch.h>
  47. #include <arch/cpu.h>
  48. #include <mm/slab.h>
  49. #include <mm/page.h>
  50. #include <mm/frame.h>
  51. #include <arch/types.h>
  52. #include <config.h>
  53. #include <panic.h>
  54. #include <typedefs.h>
  55. #include <memstr.h>
  56. #include <adt/list.h>
  57. #include <print.h>
  58.  
  59. cpu_t *cpus;
  60.  
  61. /** Initialize CPUs
  62.  *
  63.  * Initialize kernel CPUs support.
  64.  *
  65.  */
  66. void cpu_init(void) {
  67.     int i, j;
  68.    
  69.     #ifdef CONFIG_SMP
  70.     if (config.cpu_active == 1) {
  71.     #endif /* CONFIG_SMP */
  72.         cpus = (cpu_t *) malloc(sizeof(cpu_t) * config.cpu_count,
  73.                     FRAME_ATOMIC);
  74.         if (!cpus)
  75.             panic("malloc/cpus");
  76.  
  77.         /* initialize everything */
  78.         memsetb((__address) cpus, sizeof(cpu_t) * config.cpu_count, 0);
  79.  
  80.         for (i=0; i < config.cpu_count; i++) {
  81.             cpus[i].stack = (__u8 *) PA2KA(PFN2ADDR(frame_alloc(STACK_FRAMES, FRAME_KA | FRAME_PANIC)));
  82.            
  83.             cpus[i].id = i;
  84.            
  85.             spinlock_initialize(&cpus[i].lock, "cpu_t.lock");
  86.  
  87.             for (j = 0; j < RQ_COUNT; j++) {
  88.                 spinlock_initialize(&cpus[i].rq[j].lock, "rq_t.lock");
  89.                 list_initialize(&cpus[i].rq[j].rq_head);
  90.             }
  91.         }
  92.        
  93.     #ifdef CONFIG_SMP
  94.     }
  95.     #endif /* CONFIG_SMP */
  96.  
  97.     CPU = &cpus[config.cpu_active-1];
  98.    
  99.     CPU->active = 1;
  100.     CPU->tlb_active = 1;
  101.    
  102.     cpu_identify();
  103.     cpu_arch_init();
  104. }
  105.  
  106. /** List all processors. */
  107. void cpu_list(void)
  108. {
  109.     int i;
  110.  
  111.     for (i = 0; i < config.cpu_count; i++) {
  112.         if (cpus[i].active)
  113.             cpu_print_report(&cpus[i]);
  114.         else
  115.             printf("cpu%d: not active\n", i);
  116.     }
  117. }
  118.  
  119.  /** @}
  120.  */
  121.  
  122.