VOID
BlFwReboot (
VOID
)
{
#ifdef BL_KD_SUPPORTED
/* Stop the boot debugger*/
BlBdStop();
#endif
/* Reset the machine */
EfiResetSystem(EfiResetCold);
}
/**
Passes capsules to the firmware with both virtual and physical mapping. Depending on the intended
consumption, the firmware may process the capsule immediately. If the payload should persist
across a system reset, the reset value returned from EFI_QueryCapsuleCapabilities must
be passed into ResetSystem() and will cause the capsule to be processed by the firmware as
part of the reset process.
@param CapsuleHeaderArray Virtual pointer to an array of virtual pointers to the capsules
being passed into update capsule.
@param CapsuleCount Number of pointers to EFI_CAPSULE_HEADER in
CaspuleHeaderArray.
@param ScatterGatherList Physical pointer to a set of
EFI_CAPSULE_BLOCK_DESCRIPTOR that describes the
location in physical memory of a set of capsules.
@retval EFI_SUCCESS Valid capsule was passed. If
CAPSULE_FLAGS_PERSIT_ACROSS_RESET is not set, the
capsule has been successfully processed by the firmware.
@retval EFI_DEVICE_ERROR The capsule update was started, but failed due to a device error.
@retval EFI_INVALID_PARAMETER CapsuleSize is NULL, or an incompatible set of flags were
set in the capsule header.
@retval EFI_INVALID_PARAMETER CapsuleCount is Zero.
@retval EFI_INVALID_PARAMETER For across reset capsule image, ScatterGatherList is NULL.
@retval EFI_UNSUPPORTED CapsuleImage is not recognized by the firmware.
@retval EFI_OUT_OF_RESOURCES When ExitBootServices() has been previously called this error indicates the capsule
is compatible with this platform but is not capable of being submitted or processed
in runtime. The caller may resubmit the capsule prior to ExitBootServices().
@retval EFI_OUT_OF_RESOURCES When ExitBootServices() has not been previously called then this error indicates
the capsule is compatible with this platform but there are insufficient resources to process.
**/
EFI_STATUS
EFIAPI
UpdateCapsule (
IN EFI_CAPSULE_HEADER **CapsuleHeaderArray,
IN UINTN CapsuleCount,
IN EFI_PHYSICAL_ADDRESS ScatterGatherList OPTIONAL
)
{
UINTN ArrayNumber;
EFI_STATUS Status;
EFI_CAPSULE_HEADER *CapsuleHeader;
BOOLEAN NeedReset;
BOOLEAN InitiateReset;
CHAR16 CapsuleVarName[30];
CHAR16 *TempVarName;
//
// Capsule Count can't be less than one.
//
if (CapsuleCount < 1) {
return EFI_INVALID_PARAMETER;
}
NeedReset = FALSE;
InitiateReset = FALSE;
CapsuleHeader = NULL;
CapsuleVarName[0] = 0;
for (ArrayNumber = 0; ArrayNumber < CapsuleCount; ArrayNumber++) {
//
// A capsule which has the CAPSULE_FLAGS_POPULATE_SYSTEM_TABLE flag must have
// CAPSULE_FLAGS_PERSIST_ACROSS_RESET set in its header as well.
//
CapsuleHeader = CapsuleHeaderArray[ArrayNumber];
if ((CapsuleHeader->Flags & (CAPSULE_FLAGS_PERSIST_ACROSS_RESET | CAPSULE_FLAGS_POPULATE_SYSTEM_TABLE)) == CAPSULE_FLAGS_POPULATE_SYSTEM_TABLE) {
return EFI_INVALID_PARAMETER;
}
//
// A capsule which has the CAPSULE_FLAGS_INITIATE_RESET flag must have
// CAPSULE_FLAGS_PERSIST_ACROSS_RESET set in its header as well.
//
if ((CapsuleHeader->Flags & (CAPSULE_FLAGS_PERSIST_ACROSS_RESET | CAPSULE_FLAGS_INITIATE_RESET)) == CAPSULE_FLAGS_INITIATE_RESET) {
return EFI_INVALID_PARAMETER;
}
//
// Check FMP capsule flag
//
if (CompareGuid(&CapsuleHeader->CapsuleGuid, &gEfiFmpCapsuleGuid)
&& (CapsuleHeader->Flags & CAPSULE_FLAGS_POPULATE_SYSTEM_TABLE) != 0 ) {
return EFI_INVALID_PARAMETER;
}
//
// Check Capsule image without populate flag by firmware support capsule function
//
if ((CapsuleHeader->Flags & CAPSULE_FLAGS_POPULATE_SYSTEM_TABLE) == 0) {
Status = SupportCapsuleImage (CapsuleHeader);
if (EFI_ERROR(Status)) {
return Status;
}
}
}
//
// Walk through all capsules, record whether there is a capsule needs reset
// or initiate reset. And then process capsules which has no reset flag directly.
//
for (ArrayNumber = 0; ArrayNumber < CapsuleCount ; ArrayNumber++) {
CapsuleHeader = CapsuleHeaderArray[ArrayNumber];
//
// Here should be in the boot-time for non-reset capsule image
// Platform specific update for the non-reset capsule image.
//
if ((CapsuleHeader->Flags & CAPSULE_FLAGS_PERSIST_ACROSS_RESET) == 0) {
if (EfiAtRuntime ()) {
Status = EFI_OUT_OF_RESOURCES;
} else {
Status = ProcessCapsuleImage(CapsuleHeader);
}
if (EFI_ERROR(Status)) {
return Status;
}
} else {
NeedReset = TRUE;
if ((CapsuleHeader->Flags & CAPSULE_FLAGS_INITIATE_RESET) != 0) {
InitiateReset = TRUE;
}
}
}
//
// After launching all capsules who has no reset flag, if no more capsules claims
// for a system reset just return.
//
if (!NeedReset) {
return EFI_SUCCESS;
}
//
// ScatterGatherList is only referenced if the capsules are defined to persist across
// system reset.
//
if (ScatterGatherList == (EFI_PHYSICAL_ADDRESS) (UINTN) NULL) {
return EFI_INVALID_PARAMETER;
}
//
// Check if the platform supports update capsule across a system reset
//
if (!FeaturePcdGet(PcdSupportUpdateCapsuleReset)) {
return EFI_UNSUPPORTED;
}
//
// Construct variable name CapsuleUpdateData, CapsuleUpdateData1, CapsuleUpdateData2...
// if user calls UpdateCapsule multiple times.
//
StrCpy (CapsuleVarName, EFI_CAPSULE_VARIABLE_NAME);
TempVarName = CapsuleVarName + StrLen (CapsuleVarName);
if (mTimes > 0) {
UnicodeValueToString (TempVarName, 0, mTimes, 0);
}
//
// ScatterGatherList is only referenced if the capsules are defined to persist across
// system reset. Set its value into NV storage to let pre-boot driver to pick it up
// after coming through a system reset.
//
Status = EfiSetVariable (
CapsuleVarName,
&gEfiCapsuleVendorGuid,
EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_BOOTSERVICE_ACCESS,
sizeof (UINTN),
(VOID *) &ScatterGatherList
);
if (!EFI_ERROR (Status)) {
//
// Variable has been set successfully, increase variable index.
//
mTimes++;
if(InitiateReset) {
//
// Firmware that encounters a capsule which has the CAPSULE_FLAGS_INITIATE_RESET Flag set in its header
// will initiate a reset of the platform which is compatible with the passed-in capsule request and will
// not return back to the caller.
//
EfiResetSystem (EfiResetWarm, EFI_SUCCESS, 0, NULL);
}
}
return Status;
}