diff options
Diffstat (limited to 'UefiCpuPkg/PiSmmCpuDxeSmm/MpService.c')
| -rw-r--r-- | UefiCpuPkg/PiSmmCpuDxeSmm/MpService.c | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/UefiCpuPkg/PiSmmCpuDxeSmm/MpService.c b/UefiCpuPkg/PiSmmCpuDxeSmm/MpService.c index 952cc87a20..aa25f3ea47 100644 --- a/UefiCpuPkg/PiSmmCpuDxeSmm/MpService.c +++ b/UefiCpuPkg/PiSmmCpuDxeSmm/MpService.c @@ -21,6 +21,8 @@ UINT64 gSmiMtrrs[MTRR_NUMBER_OF_FIXED_MTRR UINT64 gPhyMask;
SMM_DISPATCHER_MP_SYNC_DATA *mSmmMpSyncData = NULL;
UINTN mSmmMpSyncDataSize;
+SMM_CPU_SEMAPHORES mSmmCpuSemaphores;
+UINTN mSemaphoreSize;
/**
Performs an atomic compare exchange operation to get semaphore.
@@ -1193,6 +1195,48 @@ Exit: AsmWriteCr2 (Cr2);
}
+/**
+ Allocate buffer for all semaphores and spin locks.
+
+**/
+VOID
+InitializeSmmCpuSemaphores (
+ VOID
+ )
+{
+ UINTN ProcessorCount;
+ UINTN TotalSize;
+ UINTN GlobalSemaphoresSize;
+ UINTN SemaphoreSize;
+ UINTN Pages;
+ UINTN *SemaphoreBlock;
+ UINTN SemaphoreAddr;
+
+ SemaphoreSize = GetSpinLockProperties ();
+ ProcessorCount = gSmmCpuPrivate->SmmCoreEntryContext.NumberOfCpus;
+ GlobalSemaphoresSize = (sizeof (SMM_CPU_SEMAPHORE_GLOBAL) / sizeof (VOID *)) * SemaphoreSize;
+ TotalSize = GlobalSemaphoresSize;
+ DEBUG((EFI_D_INFO, "One Semaphore Size = 0x%x\n", SemaphoreSize));
+ DEBUG((EFI_D_INFO, "Total Semaphores Size = 0x%x\n", TotalSize));
+ Pages = EFI_SIZE_TO_PAGES (TotalSize);
+ SemaphoreBlock = AllocatePages (Pages);
+ ASSERT (SemaphoreBlock != NULL);
+ ZeroMem (SemaphoreBlock, TotalSize);
+
+ SemaphoreAddr = (UINTN)SemaphoreBlock;
+ mSmmCpuSemaphores.SemaphoreGlobal.Counter = (UINT32 *)SemaphoreAddr;
+ SemaphoreAddr += SemaphoreSize;
+ mSmmCpuSemaphores.SemaphoreGlobal.InsideSmm = (BOOLEAN *)SemaphoreAddr;
+ SemaphoreAddr += SemaphoreSize;
+ mSmmCpuSemaphores.SemaphoreGlobal.AllCpusInSync = (BOOLEAN *)SemaphoreAddr;
+ SemaphoreAddr += SemaphoreSize;
+ mSmmCpuSemaphores.SemaphoreGlobal.PFLock = (SPIN_LOCK *)SemaphoreAddr;
+ SemaphoreAddr += SemaphoreSize;
+ mSmmCpuSemaphores.SemaphoreGlobal.CodeAccessCheckLock
+ = (SPIN_LOCK *)SemaphoreAddr;
+
+ mSemaphoreSize = SemaphoreSize;
+}
/**
Initialize un-cacheable data.
@@ -1215,6 +1259,8 @@ InitializeMpSyncData ( mSmmMpSyncData->BspIndex = (UINT32)-1;
}
mSmmMpSyncData->EffectiveSyncMode = (SMM_CPU_SYNC_MODE) PcdGet8 (PcdCpuSmmSyncMode);
+
+ InitializeSmmCpuSemaphores ();
}
}
|