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