72 lines
1.8 KiB
C
72 lines
1.8 KiB
C
/**
|
|
* PROJECT: ExectOS
|
|
* COPYRIGHT: See COPYING.md in the top level directory
|
|
* FILE: xtoskrnl/mm/i686/init.c
|
|
* DESCRIPTION: Architecture specific Memory Manager initialization routines
|
|
* DEVELOPERS: Rafal Kupiec <belliash@codingworkshop.eu.org>
|
|
* Aiken Harris <harraiken91@gmail.com>
|
|
*/
|
|
|
|
#include <xtos.h>
|
|
|
|
|
|
/**
|
|
* Detects if eXtended Physical Addressing (XPA) is enabled and initializes page map support.
|
|
*
|
|
* @return This routine does not return any value.
|
|
*
|
|
* @since XT 1.0
|
|
*/
|
|
XTAPI
|
|
VOID
|
|
MmInitializePageMapSupport(VOID)
|
|
{
|
|
/* Check if XPA is enabled */
|
|
if(MmpGetExtendedPhysicalAddressingStatus())
|
|
{
|
|
/* XPA enabled, use modern PAE paging (PML3) */
|
|
MmpPageMapRoutines = &MmpPml3Routines;
|
|
|
|
/* Set PML3 page map information */
|
|
MmpPageMapInfo.Xpa = TRUE;
|
|
|
|
/* Set PML3 base addresses */
|
|
MmpPageMapInfo.PteBase = MM_PTE_BASE;
|
|
MmpPageMapInfo.PdeBase = MM_PDE_BASE;
|
|
|
|
/* Set PML3 shift values */
|
|
MmpPageMapInfo.PdiShift = MM_PDI_SHIFT;
|
|
MmpPageMapInfo.PteShift = MM_PTE_SHIFT;
|
|
}
|
|
else
|
|
{
|
|
/* XPA disabled, use legacy i386 paging (PML2) */
|
|
MmpPageMapRoutines = &MmpPml2Routines;
|
|
|
|
/* Set PML2 page map information */
|
|
MmpPageMapInfo.Xpa = FALSE;
|
|
|
|
/* Set PML2 base addresses */
|
|
MmpPageMapInfo.PteBase = MM_PTE_BASE;
|
|
MmpPageMapInfo.PdeBase = MM_PDE_LEGACY_BASE;
|
|
|
|
/* Set PML2 shift values */
|
|
MmpPageMapInfo.PdiShift = MM_PDI_LEGACY_SHIFT;
|
|
MmpPageMapInfo.PteShift = MM_PTE_LEGACY_SHIFT;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Performs architecture specific initialization of the XTOS Memory Manager.
|
|
*
|
|
* @return This routine does not return any value.
|
|
*
|
|
* @since XT 1.0
|
|
*/
|
|
XTAPI
|
|
VOID
|
|
MmpInitializeArchitecture(VOID)
|
|
{
|
|
UNIMPLEMENTED;
|
|
}
|