EFI Related

Delay()

方法一：使用UEFI內建函數
1
gBS->Stall(Microsecond);
     使用Stall要注意如下
#include <Library/UefiBootServicesTableLib.h>
Stall以微秒(µs，10-6)為單位

方法二：使用標準C Library的函數
1
sleep(second);
     使用sleep要注意如下
#include <Include/unistd.h>
inf中，在[LibraryClasses]添加LibC
sleep以秒為單位
pST  = SystemTable
gBS = SystemTable->BootServices)
UDK: #include <Library/UefiBootServicesTableLib.h>

MdePkg.dec

TimerLib

#include <Library/TimerLib.h>

MicroSecondDelay()

===================

EVENT

CreateEventEx 為事件組 一個 event 被觸發 就全部都跑一遍 (優先權為 先看TPL 在來是晚註冊的先跑)

EFI_EVENT Event;

EFI_GUID gGuid = EFI_MY_GUID;

gBS->CreateEventEx (0, 0, NULL, NULL,&gGuid,&Event);

gBS->SignalEvent (Event);

gBS->CloseEvent (Event);

原型:

CoreCreateEventEx (

  IN UINT32                   Type,

  IN EFI_TPL                  NotifyTpl,

  IN EFI_EVENT_NOTIFY         NotifyFunction, OPTIONAL

  IN CONST VOID               *NotifyContext, OPTIONAL

  IN CONST EFI_GUID           *EventGroup,    OPTIONAL

  OUT EFI_EVENT               *Event

  );

1.If a UEFI Driver creates events in its  driver entry point, those events must be closed with CloseEvent() in the UEFI Driver's Unload() function

2.If a UEFI Driver creates events in its Driver Binding Protocol Start()function associated with a device, those events must be closed with CloseEvent() in its Driver Binding Protocol  Stop() function.

3.If a UEFI Driver creates events as part of an  I/O operation, the event should be closed with CloseEvent() when the I /O operation is completed.

Adding the Unload Feature

https://blog.csdn.net/CStyle_0x007/article/details/8945459

https://blog.csdn.net/luobing4365/article/details/104552594

https://blog.csdn.net/stringNewName/article/details/80004887


extern EFI_BOOT_SERVICES *gBS;
extern EFI_SYSTEM_TABLE *gST;
extern EFI_RUNTIME_SERVICES *gRT;

InitAmiLib()

pST = SystemTable;

pBS = pST->BootServices;

pRS = pST->RuntimeServices;

#define gBS pBS

#define gRT pRS

gST = pST;

gBS = pBS;

gRT = pRS;