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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. /** @addtogroup generic
  30.  * @{
  31.  */
  32.  
  33. /**
  34.  * @file
  35.  * @brief   CPU subsystem initialization and listing.
  36.  */
  37.  
  38. #include <cpu.h>
  39. #include <arch.h>
  40. #include <arch/asm.h>
  41. #include <arch/cpu.h>
  42. #include <mm/slab.h>
  43. #include <mm/page.h>
  44. #include <mm/frame.h>
  45. #include <arch/types.h>
  46. #include <config.h>
  47. #include <panic.h>
  48. #include <memstr.h>
  49. #include <adt/list.h>
  50. #include <print.h>
  51.  
  52. cpu_t *cpus;
  53.  
  54. /** Initialize CPUs
  55.  *
  56.  * Initialize kernel CPUs support.
  57.  *
  58.  */
  59. void cpu_init(void) {
  60.     unsigned int i, j;
  61.    
  62. #ifdef CONFIG_SMP
  63.     if (config.cpu_active == 1) {
  64. #endif /* CONFIG_SMP */
  65.         cpus = (cpu_t *) malloc(sizeof(cpu_t) * config.cpu_count,
  66.                     FRAME_ATOMIC);
  67.         if (!cpus)
  68.             panic("malloc/cpus");
  69.  
  70.         /* initialize everything */
  71.         memsetb(cpus, sizeof(cpu_t) * config.cpu_count, 0);
  72.  
  73.         for (i = 0; i < config.cpu_count; i++) {
  74.             cpus[i].stack = (uint8_t *) frame_alloc(STACK_FRAMES, FRAME_KA | FRAME_ATOMIC);
  75.            
  76.             cpus[i].id = i;
  77.            
  78.             spinlock_initialize(&cpus[i].lock, "cpu_t.lock");
  79.  
  80.             for (j = 0; j < RQ_COUNT; j++) {
  81.                 spinlock_initialize(&cpus[i].rq[j].lock, "rq_t.lock");
  82.                 list_initialize(&cpus[i].rq[j].rq_head);
  83.             }
  84.         }
  85.        
  86. #ifdef CONFIG_SMP
  87.     }
  88. #endif /* CONFIG_SMP */
  89.  
  90.     CPU = &cpus[config.cpu_active - 1];
  91.    
  92.     CPU->active = 1;
  93.     CPU->tlb_active = 1;
  94.    
  95.     cpu_identify();
  96.     cpu_arch_init();
  97. }
  98.  
  99. /** List all processors. */
  100. void cpu_list(void)
  101. {
  102.     unsigned int i;
  103.  
  104.     for (i = 0; i < config.cpu_count; i++) {
  105.         if (cpus[i].active)
  106.             cpu_print_report(&cpus[i]);
  107.         else
  108.             printf("cpu%u: not active\n", i);
  109.     }
  110. }
  111.  
  112. /** @}
  113.  */
  114.  
  115.