UefiCpuPkg/MpInitLib: Implementation of MpInitLibEnableDisableAP()

[mirror_edk2.git] / UefiCpuPkg / Library / MpInitLib / MpLib.c

diff --git a/UefiCpuPkg/Library/MpInitLib/MpLib.c b/UefiCpuPkg/Library/MpInitLib/MpLib.c
index 8ae08f4d5d5f050bf89cda7be0fc614e566f62cc..3a266e9607d4884ded4dc86bd28123a0f50b393c 100644 (file)
--- a/UefiCpuPkg/Library/MpInitLib/MpLib.c
+++ b/UefiCpuPkg/Library/MpInitLib/MpLib.c
@@ -1238,6 +1238,62 @@ SwitchBSPWorker (
   return EFI_SUCCESS;\r
 }\r
 \r
+/**\r
+  Worker function to let the caller enable or disable an AP from this point onward.\r
+  This service may only be called from the BSP.\r
+\r
+  @param[in] ProcessorNumber   The handle number of AP.\r
+  @param[in] EnableAP          Specifies the new state for the processor for\r
+                               enabled, FALSE for disabled.\r
+  @param[in] HealthFlag        If not NULL, a pointer to a value that specifies\r
+                               the new health status of the AP.\r
+\r
+  @retval EFI_SUCCESS          The specified AP was enabled or disabled successfully.\r
+  @retval others               Failed to Enable/Disable AP.\r
+\r
+**/\r
+EFI_STATUS\r
+EnableDisableApWorker (\r
+  IN  UINTN                     ProcessorNumber,\r
+  IN  BOOLEAN                   EnableAP,\r
+  IN  UINT32                    *HealthFlag OPTIONAL\r
+  )\r
+{\r
+  CPU_MP_DATA               *CpuMpData;\r
+  UINTN                     CallerNumber;\r
+\r
+  CpuMpData = GetCpuMpData ();\r
+\r
+  //\r
+  // Check whether caller processor is BSP\r
+  //\r
+  MpInitLibWhoAmI (&CallerNumber);\r
+  if (CallerNumber != CpuMpData->BspNumber) {\r
+    return EFI_DEVICE_ERROR;\r
+  }\r
+\r
+  if (ProcessorNumber == CpuMpData->BspNumber) {\r
+    return EFI_INVALID_PARAMETER;\r
+  }\r
+\r
+  if (ProcessorNumber >= CpuMpData->CpuCount) {\r
+    return EFI_NOT_FOUND;\r
+  }\r
+\r
+  if (!EnableAP) {\r
+    SetApState (&CpuMpData->CpuData[ProcessorNumber], CpuStateDisabled);\r
+  } else {\r
+    SetApState (&CpuMpData->CpuData[ProcessorNumber], CpuStateIdle);\r
+  }\r
+\r
+  if (HealthFlag != NULL) {\r
+    CpuMpData->CpuData[ProcessorNumber].CpuHealthy =\r
+          (BOOLEAN) ((*HealthFlag & PROCESSOR_HEALTH_STATUS_BIT) != 0);\r
+  }\r
+\r
+  return EFI_SUCCESS;\r
+}\r
+\r
 /**\r
   This return the handle number for the calling processor.  This service may be\r
   called from the BSP and APs.\r