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UefiCpuPkg/CpuDxe: implement Mp Services:SwitchBSP() 

by now, SwitchBSP() always return UNSUPPORTED

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Chen Fan <chen.fan.fnst@cn.fujitsu.com>
Reviewed-by: Jeff Fan <jeff.fan@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16360 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Chen Fan 2014-11-13 18:27:52 +00:00 committed by jljusten
parent 5fee172fb7
commit b7c05ba517
2 changed files with 93 additions and 1 deletions
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51
UefiCpuPkg/CpuDxe/CpuMp.c
View File

@ -30,7 +30,7 @@ EFI_MP_SERVICES_PROTOCOL mMpServicesTemplate = {
GetProcessorInfo,
StartupAllAPs,
StartupThisAP,
NULL, // SwitchBSP,
SwitchBSP,
EnableDisableAP,
WhoAmI
};
@ -891,6 +891,55 @@ StartupThisAP (
return EFI_SUCCESS;
}
/**
This service switches the requested AP to be the BSP from that point onward.
This service changes the BSP for all purposes. This call can only be performed
by the current BSP.
This service switches the requested AP to be the BSP from that point onward.
This service changes the BSP for all purposes. The new BSP can take over the
execution of the old BSP and continue seamlessly from where the old one left
off. This service may not be supported after the UEFI Event EFI_EVENT_GROUP_READY_TO_BOOT
is signaled.
If the BSP cannot be switched prior to the return from this service, then
EFI_UNSUPPORTED must be returned.
@param[in] This A pointer to the EFI_MP_SERVICES_PROTOCOL instance.
@param[in] ProcessorNumber The handle number of AP that is to become the new
BSP. The range is from 0 to the total number of
logical processors minus 1. The total number of
logical processors can be retrieved by
EFI_MP_SERVICES_PROTOCOL.GetNumberOfProcessors().
@param[in] EnableOldBSP If TRUE, then the old BSP will be listed as an
enabled AP. Otherwise, it will be disabled.
@retval EFI_SUCCESS BSP successfully switched.
@retval EFI_UNSUPPORTED Switching the BSP cannot be completed prior to
this service returning.
@retval EFI_UNSUPPORTED Switching the BSP is not supported.
@retval EFI_SUCCESS The calling processor is an AP.
@retval EFI_NOT_FOUND The processor with the handle specified by
ProcessorNumber does not exist.
@retval EFI_INVALID_PARAMETER ProcessorNumber specifies the current BSP or
a disabled AP.
@retval EFI_NOT_READY The specified AP is busy.
**/
EFI_STATUS
EFIAPI
SwitchBSP (
IN EFI_MP_SERVICES_PROTOCOL *This,
IN UINTN ProcessorNumber,
IN BOOLEAN EnableOldBSP
)
{
//
// Current always return unsupported.
//
return EFI_UNSUPPORTED;
}
/**
This service lets the caller enable or disable an AP from this point onward.
This service may only be called from the BSP.

43
UefiCpuPkg/CpuDxe/CpuMp.h
View File

@ -465,6 +465,49 @@ StartupThisAP (
OUT BOOLEAN *Finished OPTIONAL
);
/**
This service switches the requested AP to be the BSP from that point onward.
This service changes the BSP for all purposes. This call can only be performed
by the current BSP.
This service switches the requested AP to be the BSP from that point onward.
This service changes the BSP for all purposes. The new BSP can take over the
execution of the old BSP and continue seamlessly from where the old one left
off. This service may not be supported after the UEFI Event EFI_EVENT_GROUP_READY_TO_BOOT
is signaled.
If the BSP cannot be switched prior to the return from this service, then
EFI_UNSUPPORTED must be returned.
@param[in] This A pointer to the EFI_MP_SERVICES_PROTOCOL instance.
@param[in] ProcessorNumber The handle number of AP that is to become the new
BSP. The range is from 0 to the total number of
logical processors minus 1. The total number of
logical processors can be retrieved by
EFI_MP_SERVICES_PROTOCOL.GetNumberOfProcessors().
@param[in] EnableOldBSP If TRUE, then the old BSP will be listed as an
enabled AP. Otherwise, it will be disabled.
@retval EFI_SUCCESS BSP successfully switched.
@retval EFI_UNSUPPORTED Switching the BSP cannot be completed prior to
this service returning.
@retval EFI_UNSUPPORTED Switching the BSP is not supported.
@retval EFI_SUCCESS The calling processor is an AP.
@retval EFI_NOT_FOUND The processor with the handle specified by
ProcessorNumber does not exist.
@retval EFI_INVALID_PARAMETER ProcessorNumber specifies the current BSP or
a disabled AP.
@retval EFI_NOT_READY The specified AP is busy.
**/
EFI_STATUS
EFIAPI
SwitchBSP (
IN EFI_MP_SERVICES_PROTOCOL *This,
IN UINTN ProcessorNumber,
IN BOOLEAN EnableOldBSP
);
/**
This service lets the caller enable or disable an AP from this point onward.
This service may only be called from the BSP.