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 static PHYSICAL_ADDRESS PcrPages[MAXIMUM_PROCESSORS];
  44
  45 /* FUNCTIONS *****************************************************************/
  46
  47 VOID
  48 KePrepareForApplicationProcessorInit(ULONG Id)
  49 {
  50   MmRequestPageMemoryConsumer(MC_NPPOOL, FALSE, &PcrPages[Id]);
  51   KiGdtPrepareForApplicationProcessorInit(Id);
  52 }
  53
  54 VOID
  55 KeApplicationProcessorInit(VOID)
  56 {
  57   PKPCR KPCR;
  58   ULONG Offset;
  59
  60   /*
  61    * Create a PCR for this processor
  62    */
  63   Offset = InterlockedIncrement((LONG *)&PcrsAllocated) - 1;
  64   KPCR = (PKPCR)(KPCR_BASE + (Offset * PAGE_SIZE));
  65   MmCreateVirtualMappingForKernel((PVOID)KPCR,
  66                                   PAGE_READWRITE,
  67                                   PcrPages[Offset]);
  68   memset(KPCR, 0, PAGE_SIZE);
  69   KPCR->ProcessorNumber = Offset;
  70   KPCR->Self = KPCR;
  71   KPCR->Irql = HIGH_LEVEL;
  72
  73   /* Mark the end of the exception handler list */
  74   KPCR->Tib.ExceptionList = (PVOID)-1;
  75
  76   /*
  77    * Initialize the GDT
  78    */
  79   KiInitializeGdt(KPCR);
  80
  81   /*
  82    * It is now safe to process interrupts
  83    */
  84   KeLowerIrql(DISPATCH_LEVEL);
  85
  86   /*
  87    * Initialize the TSS
  88    */
  89   Ki386ApplicationProcessorInitializeTSS();
  90
  91   /*
  92    * Initialize a default LDT
  93    */
  94   Ki386InitializeLdt();
  95
  96   __asm__ __volatile__ ("sti\n\t");
  97 }
  98
  99 VOID
 100 KeInit1(VOID)
 101 {
 102    PKPCR KPCR;
 103    extern USHORT KiBootGdt[];
 104    extern KTSS KiBootTss;
 105
 106    KiCheckFPU();
 107
 108    KiInitializeGdt (NULL);
 109    Ki386BootInitializeTSS();
 110    KeInitExceptions ();
 111    KeInitInterrupts ();
 112
 113    /*
 114     * Initialize the initial PCR region. We can't allocate a page
 115     * with MmAllocPage() here because MmInit1() has not yet been
 116     * called, so we use a predefined page in low memory
 117     */
 118    KPCR = (PKPCR)KPCR_BASE;
 119    memset(KPCR, 0, PAGE_SIZE);
 120    KPCR->Self = (PKPCR)KPCR_BASE;
 121    KPCR->Irql = HIGH_LEVEL;
 122    KPCR->GDT = (PUSHORT)&KiBootGdt;
 123    KPCR->IDT = (PUSHORT)&KiIdt;
 124    KPCR->TSS = &KiBootTss;
 125    KPCR->ProcessorNumber = 0;
 126    KiPcrInitDone = 1;
 127    PcrsAllocated++;
 128
 129    /* Mark the end of the exception handler list */
 130    KPCR->Tib.ExceptionList = (PVOID)-1;
 131
 132    Ki386InitializeLdt();
 133 }
 134
 135 VOID
 136 KeInit2(VOID)
 137 {
 138    KeInitDpc();
 139    KeInitializeBugCheck();
 140    KeInitializeDispatcher();
 141    KeInitializeTimerImpl();
 142 }