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