83 lines
1.8 KiB
C
83 lines
1.8 KiB
C
/**
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* PROJECT: ExectOS
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* COPYRIGHT: See COPYING.md in the top level directory
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* FILE: xtldr/efiutils.c
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* DESCRIPTION: EFI related routines for XT Boot Loader
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* DEVELOPERS: Rafal Kupiec <belliash@codingworkshop.eu.org>
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*/
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#include <xtldr.h>
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/**
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* Exits EFI boot services.
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*
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* @param MapKey
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* Identifies the current memory map of the system.
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*
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* @return This routine returns status code.
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*
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* @since XT 1.0
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*/
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XTCDECL
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EFI_STATUS
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BlExitBootServices(IN UINT_PTR MapKey)
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{
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EFI_STATUS Status;
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/* Attempt to exit boot services */
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Status = EfiSystemTable->BootServices->ExitBootServices(BlpStatus.ImageHandle, MapKey);
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if(Status != STATUS_EFI_SUCCESS)
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{
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/* Retry as UEFI spec says to do it twice */
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Status = EfiSystemTable->BootServices->ExitBootServices(BlpStatus.ImageHandle, MapKey);
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}
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/* Make sure boot services were successfully exited */
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if(Status == STATUS_EFI_SUCCESS)
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{
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/* Mark EFI Boot Services as no longer available */
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BlpStatus.BootServices = FALSE;
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}
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/* Return EFI status code */
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return Status;
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}
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/**
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* Puts the system to sleep for the specified number of milliseconds.
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*
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* @param Milliseconds
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* Supplies the number of milliseconds to sleep.
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*
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* @return This routine does not return any value.
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*
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* @since XT 1.0
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*/
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XTCDECL
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VOID
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BlSleepExecution(IN ULONG_PTR Milliseconds)
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{
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EfiSystemTable->BootServices->Stall(Milliseconds * 1000);
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}
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/**
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* Initializes EFI Boot Loader (XTLDR).
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*
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* @return This routine does not return any value.
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*
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* @since XT 1.0
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*/
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XTCDECL
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VOID
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BlpInitializeEfiBootLoader()
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{
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/* Set current XTLDR status */
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BlpStatus.BootServices = TRUE;
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BlpStatus.ImageHandle = EfiImageHandle;
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BlpStatus.SystemTable = EfiSystemTable;
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/* Initialize console */
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BlpConsoleInitialize();
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}
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