forked from xt-sys/exectos
26 lines
629 B
C
26 lines
629 B
C
/**
|
|
* PROJECT: ExectOS
|
|
* COPYRIGHT: See COPYING.md in the top level directory
|
|
* FILE: xtoskrnl/mm/amd64/pmap.c
|
|
* DESCRIPTION: Low-level support for AMD64 page map manipulation
|
|
* DEVELOPERS: Aiken Harris <harraiken91@gmail.com>
|
|
*/
|
|
|
|
#include <xtos.h>
|
|
|
|
|
|
/**
|
|
* Checks if eXtended Physical Addressing (XPA) is enabled.
|
|
*
|
|
* @return This routine returns TRUE if LA57 is enabled, or FALSE otherwise.
|
|
*
|
|
* @since XT 1.0
|
|
*/
|
|
XTAPI
|
|
BOOLEAN
|
|
MmpGetExtendedPhysicalAddressingStatus(VOID)
|
|
{
|
|
/* Check if LA57 is enabled */
|
|
return ((ArReadControlRegister(4) & CR4_LA57) != 0) ? TRUE : FALSE;
|
|
}
|