DxeFrb

Function Table

Address	Name	Description
	DebugPrint
	DebugAssert
	ReadUnaligned64
	CompareGuid
	GetHobList
	WchgGetState
	WchgSetTimerValue
	WchgSetEnableFlags
	WchgSetActionFlags
	WchgProgramAndArm
	WchgReadBackVerify
	Frb2OpromNotify
	Frb2PasswordNotify
	Frb2PasswordDoneNotify
	Frb2PromptTimeoutNotify
	Frb2PromptTimeoutDoneNotify
	ShellEntryNotify
	ReadyToBootCallback
	BootPhaseNotify
	RegisterBootEvent
	RegisterReadyToBootEvent
	InitializeHobList
	FreePool
	DxeFrbEntryPoint
Globals	// ============================================================================
qword_2110	-- EFI_WATCHDOG_TIMER_ARCH_PROTOCOL
qword_1CC8	-- HOB list pointer
qword_1CD8	-- Allocated driver instance
qword_1CC0	-- WCHG debug protocol
byte_1CE6	BOOLEAN gOsWdtEnabled = FALSE; // byte_1CEB
byte_1CEE	*UINT16 gOsWdtTimeout = 600; // n600 (600 100ms = 60s)**
byte_1CD1	//
WCHG	timer state storage	3 timers * 6 bytes each (at 0x2120)
UINT8	gWchgTimerState[0x30];
GUIDs	used by this module
EFI_GUID	gEfiWatchdogTimerArchProtocolGuid = EFI_WATCHDOG_TIMER_ARCH_PROTOCOL_GUID;
Internal	Helpers
Read	CMOS index 0x4B to get current debug level
SavedCMOSIndex	= IoRead8 (0x70);
Normalize	debug level
if	(DebugLevel > 3) {
0	**or 3 => ERROR	WARN**
WCHG	Hardware Access Layer
Register	index (timer state)
Access	type: read
Decode	returned data
For	FRB2 (timer 1), check if this is a cold boot via HOB
if	(TimerIndex == 1) {
S3	resume	skip
Prepare	WCHG register data
Countdown	*= (UINT16* )&gWchgTimerState[6 * TimerIndex];**
Countdown	of 0 means timer is disabled
Set	action mask based on whether this is a full system reset
if	(!ResetSystem) {
FRB2	action
OS	WDT action
Full	system reset action
Write	register data
ResultSize	= 6;
Access	type: write
Second	write to commit/arm
ResultSize	= 0;
Access	type: commit/arm
Read	hardware state
ResultSize	= 8;
Timer	is running	verify index, sync state
if	((WchgData[0] & 7) != TimerIndex) {
Timer	not running	already disabled
DEBUG	((DEBUG_ERROR, "%a: EfiFrb2 already disabled\n", FUNCTION));
Boot	Phase Notification Handlers
Event	Registration Helpers
Driver	Entry Point
Status	= gBS->LocateProtocol (
Driver	= AllocateZeroPool (sizeof (FRB2_DRIVER));
Status	= gBS->InstallProtocolInterface (
VariableSize	= sizeof (ServerSetup);
Defaults	when variable not found
gFrb2Enabled	= TRUE;
60	*seconds (600 100ms)**
if	(gFrb2Enabled) {

Generated by HR650X BIOS Decompilation Project