diff options
| author | Chen Fan <chen.fan.fnst@cn.fujitsu.com> | 2014-11-13 18:26:42 +0000 |
|---|---|---|
| committer | jljusten <jljusten@Edk2> | 2014-11-13 18:26:42 +0000 |
| commit | d894d8b704324da8ed902677703ed9d4f7c85076 (patch) | |
| tree | dd119697b03bbcd9349931a34644061ec7f719b7 /UefiCpuPkg/CpuDxe/CpuMp.c | |
| parent | cfa2fac1f667b227a29a2219321b651c7a143071 (diff) | |
| download | edk2-platforms-d894d8b704324da8ed902677703ed9d4f7c85076.tar.xz | |
UefiCpuPkg/CpuDxe: implement Mp Protocol:GetNumberOfProcessors()
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@16355 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'UefiCpuPkg/CpuDxe/CpuMp.c')
| -rw-r--r-- | UefiCpuPkg/CpuDxe/CpuMp.c | 82 |
1 files changed, 81 insertions, 1 deletions
diff --git a/UefiCpuPkg/CpuDxe/CpuMp.c b/UefiCpuPkg/CpuDxe/CpuMp.c index 88bf95269d..23d395daec 100644 --- a/UefiCpuPkg/CpuDxe/CpuMp.c +++ b/UefiCpuPkg/CpuDxe/CpuMp.c @@ -25,7 +25,7 @@ VOID *mTopOfApCommonStack = 0; VOID *mApStackStart = 0;
EFI_MP_SERVICES_PROTOCOL mMpServicesTemplate = {
- NULL, // GetNumberOfProcessors,
+ GetNumberOfProcessors,
NULL, // GetProcessorInfo,
NULL, // StartupAllAPs,
NULL, // StartupThisAP,
@@ -35,6 +35,86 @@ EFI_MP_SERVICES_PROTOCOL mMpServicesTemplate = { };
/**
+ Check whether caller processor is BSP.
+
+ @retval TRUE the caller is BSP
+ @retval FALSE the caller is AP
+
+**/
+BOOLEAN
+IsBSP (
+ VOID
+ )
+{
+ UINTN CpuIndex;
+ CPU_DATA_BLOCK *CpuData;
+
+ CpuData = NULL;
+
+ WhoAmI (&mMpServicesTemplate, &CpuIndex);
+ CpuData = &mMpSystemData.CpuDatas[CpuIndex];
+
+ return CpuData->Info.StatusFlag & PROCESSOR_AS_BSP_BIT ? TRUE : FALSE;
+}
+
+/**
+ This service retrieves the number of logical processor in the platform
+ and the number of those logical processors that are enabled on this boot.
+ This service may only be called from the BSP.
+
+ This function is used to retrieve the following information:
+ - The number of logical processors that are present in the system.
+ - The number of enabled logical processors in the system at the instant
+ this call is made.
+
+ Because MP Service Protocol provides services to enable and disable processors
+ dynamically, the number of enabled logical processors may vary during the
+ course of a boot session.
+
+ If this service is called from an AP, then EFI_DEVICE_ERROR is returned.
+ If NumberOfProcessors or NumberOfEnabledProcessors is NULL, then
+ EFI_INVALID_PARAMETER is returned. Otherwise, the total number of processors
+ is returned in NumberOfProcessors, the number of currently enabled processor
+ is returned in NumberOfEnabledProcessors, and EFI_SUCCESS is returned.
+
+ @param[in] This A pointer to the EFI_MP_SERVICES_PROTOCOL
+ instance.
+ @param[out] NumberOfProcessors Pointer to the total number of logical
+ processors in the system, including the BSP
+ and disabled APs.
+ @param[out] NumberOfEnabledProcessors Pointer to the number of enabled logical
+ processors that exist in system, including
+ the BSP.
+
+ @retval EFI_SUCCESS The number of logical processors and enabled
+ logical processors was retrieved.
+ @retval EFI_DEVICE_ERROR The calling processor is an AP.
+ @retval EFI_INVALID_PARAMETER NumberOfProcessors is NULL.
+ @retval EFI_INVALID_PARAMETER NumberOfEnabledProcessors is NULL.
+
+**/
+EFI_STATUS
+EFIAPI
+GetNumberOfProcessors (
+ IN EFI_MP_SERVICES_PROTOCOL *This,
+ OUT UINTN *NumberOfProcessors,
+ OUT UINTN *NumberOfEnabledProcessors
+ )
+{
+ if ((NumberOfProcessors == NULL) || (NumberOfEnabledProcessors == NULL)) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ if (!IsBSP ()) {
+ return EFI_DEVICE_ERROR;
+ }
+
+ *NumberOfProcessors = mMpSystemData.NumberOfProcessors;
+ *NumberOfEnabledProcessors = mMpSystemData.NumberOfEnabledProcessors;
+ return EFI_SUCCESS;
+}
+
+/**
This return the handle number for the calling processor. This service may be
called from the BSP and APs.
|