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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 <arch.h>
  30.  
  31. #include <arch/types.h>
  32. #include <typedefs.h>
  33.  
  34. #include <arch/pm.h>
  35.  
  36. #include <arch/ega.h>
  37. #include <arch/i8042.h>
  38. #include <arch/i8254.h>
  39. #include <arch/i8259.h>
  40.  
  41. #include <arch/context.h>
  42.  
  43. #include <config.h>
  44.  
  45. #include <arch/interrupt.h>
  46. #include <arch/asm.h>
  47. #include <arch/acpi/acpi.h>
  48.  
  49. void write_dr0(__u32 v)
  50. {
  51.     __asm__("movl %0,%%dr0" : : "r" (v));
  52. }
  53.  
  54. inline __u32 read_dr0(void)
  55. {
  56.     __u32 v;
  57.    
  58.     __asm__("movl %%dr0,%0\n" : "=r" (v));
  59.    
  60.     return v;
  61. }
  62.  
  63. void arch_pre_mm_init(void)
  64. {
  65.     pm_init();
  66.  
  67.     write_dr0(config.cpu_active - 1);
  68.  
  69.     if (config.cpu_active == 1) {
  70.         i8042_init();   /* a20 bit */
  71.             i8259_init();   /* PIC */
  72.         i8254_init();   /* hard clock */
  73.  
  74.         trap_register(VECTOR_SYSCALL, syscall);
  75.        
  76.         #ifdef __SMP__
  77.         trap_register(VECTOR_TLB_SHOOTDOWN_IPI, tlb_shootdown_ipi);
  78.         trap_register(VECTOR_WAKEUP_IPI, wakeup_ipi);
  79.         #endif /* __SMP__ */
  80.     }
  81. }
  82.  
  83. void arch_post_mm_init()
  84. {
  85.     if (config.cpu_active == 1) {
  86.         ega_init(); /* video */
  87.         acpi_init();
  88.     }
  89. }
  90.  
  91. void calibrate_delay_loop(void)
  92. {
  93.     i8254_calibrate_delay_loop();
  94.     i8254_normal_operation();
  95. }
  96.