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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/heap.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 <list.h>
  41.  
  42. cpu_t *cpus;
  43.  
  44. /** Initialize CPUs
  45.  *
  46.  * Initialize kernel CPUs support.
  47.  *
  48.  */
  49. void cpu_init(void) {
  50.     int i, j;
  51.    
  52.     #ifdef CONFIG_SMP
  53.     if (config.cpu_active == 1) {
  54.     #endif /* CONFIG_SMP */
  55.         cpus = (cpu_t *) malloc(sizeof(cpu_t) * config.cpu_count);
  56.         if (!cpus)
  57.             panic("malloc/cpus");
  58.  
  59.         /* initialize everything */
  60.         memsetb((__address) cpus, sizeof(cpu_t) * config.cpu_count, 0);
  61.  
  62.         for (i=0; i < config.cpu_count; i++) {
  63.             cpus[i].stack = (__u8 *) frame_alloc(FRAME_KA | FRAME_PANIC, ONE_FRAME);
  64.             if (!cpus[i].stack)
  65.                 panic("malloc/cpus[%d].stack\n", i);
  66.            
  67.             cpus[i].id = i;
  68.            
  69.             spinlock_initialize(&cpus[i].lock, "cpu_t.lock");
  70.  
  71.             #ifdef CONFIG_SMP
  72.             waitq_initialize(&cpus[i].kcpulb_wq);
  73.             #endif /* __SMP */
  74.            
  75.             for (j = 0; j < RQ_COUNT; j++) {
  76.                 spinlock_initialize(&cpus[i].rq[j].lock, "rq_t.lock");
  77.                 list_initialize(&cpus[i].rq[j].rq_head);
  78.             }
  79.         }
  80.        
  81.     #ifdef CONFIG_SMP
  82.     }
  83.     #endif /* CONFIG_SMP */
  84.  
  85.     CPU = &cpus[config.cpu_active-1];
  86.    
  87.     CPU->active = 1;
  88.     CPU->tlb_active = 1;
  89.    
  90.     cpu_identify();
  91.     cpu_arch_init();
  92. }
  93.