reactos/ntoskrnl/ke/i386/kernel.c

   1 /*
   2  *  ReactOS kernel
   3  *  Copyright (C) 1998, 1999, 2000, 2001 ReactOS Team
   4  *
   5  *  This program is free software; you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation; either version 2 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with this program; if not, write to the Free Software
  17  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18  */
  19 /*
  20  * PROJECT:         ReactOS kernel
  21  * FILE:            ntoskrnl/ke/i386/kernel.c
  22  * PURPOSE:         Initializes the kernel
  23  * PROGRAMMER:      David Welch (welch@mcmail.com)
  24  * UPDATE HISTORY:
  25  *                  Created 22/05/98
  26  */
  27
  28 /* INCLUDES *****************************************************************/
  29
  30 #include <ddk/ntddk.h>
  31 #include <internal/ke.h>
  32 #include <internal/mm.h>
  33 #include <internal/ps.h>
  34 #include <internal/i386/fpu.h>
  35
  36 #define NDEBUG
  37 #include <internal/debug.h>
  38
  39 /* GLOBALS *******************************************************************/
  40
  41 ULONG KiPcrInitDone = 0;
  42 static ULONG PcrsAllocated = 0;
  43
  44 /* FUNCTIONS *****************************************************************/
  45
  46 VOID
  47 KeApplicationProcessorInit()
  48 {
  49   PKPCR KPCR;
  50   ULONG Offset;
  51
  52   /*
  53    * Create a PCR for this processor
  54    */
  55   Offset = InterlockedIncrement(&PcrsAllocated);
  56   KPCR = (PKPCR)(KPCR_BASE + (Offset * PAGESIZE));
  57   MmCreateVirtualMapping(NULL,
  58                          (PVOID)KPCR,
  59                          PAGE_READWRITE,
  60                          (ULONG)MmAllocPage(0));
  61   memset(KPCR, 0, PAGESIZE);
  62   KPCR->ProcessorNumber = Offset;
  63   KPCR->Self = KPCR;
  64   KPCR->Irql = HIGH_LEVEL;
  65
  66   /*
  67    * Initialize the GDT
  68    */
  69   KiInitializeGdt(KPCR);
  70
  71   /*
  72    * Initialize the TSS
  73    */
  74   Ki386ApplicationProcessorInitializeTSS();
  75 }
  76
  77 VOID
  78 KeInit1(VOID)
  79 {
  80    PKPCR KPCR;
  81    extern USHORT KiBootGdt[];
  82    extern KTSS KiBootTss;
  83
  84    KiCheckFPU();
  85
  86    KiInitializeGdt (NULL);
  87    Ki386BootInitializeTSS();
  88    KeInitExceptions ();
  89    KeInitInterrupts ();
  90
  91    /*
  92     * Initialize the initial PCR region. We can't allocate a page
  93     * with MmAllocPage() here because MmInit1() has not yet been
  94     * called, so we use a predefined page in low memory
  95     */
  96    KPCR = (PKPCR)KPCR_BASE;
  97    memset(KPCR, 0, PAGESIZE);
  98    KPCR->Self = (PKPCR)KPCR_BASE;
  99    KPCR->Irql = HIGH_LEVEL;
 100    KPCR->GDT = (PUSHORT)&KiBootGdt;
 101    KPCR->IDT = (PUSHORT)&KiIdt;
 102    KPCR->TSS = &KiBootTss;
 103    KPCR->ProcessorNumber = 0;
 104    KiPcrInitDone = 1;
 105    PcrsAllocated++;
 106 }
 107
 108 VOID
 109 KeInit2(VOID)
 110 {
 111    KeInitDpc();
 112    KeInitializeBugCheck();
 113    KeInitializeDispatcher();
 114    KeInitializeTimerImpl();
 115 }