IntelFsp2Pkg: Replace BSD License with BSD+Patent License

[mirror_edk2.git] / IntelFsp2Pkg / FspSecCore / SecMain.c

diff --git a/IntelFsp2Pkg/FspSecCore/SecMain.c b/IntelFsp2Pkg/FspSecCore/SecMain.c
index ddbfc4fcdf0b5a14abf47a3546f9977785ec0410..cd3ab46ce2401c291d5d9c964986e68153e2d24f 100644 (file)
--- a/IntelFsp2Pkg/FspSecCore/SecMain.c
+++ b/IntelFsp2Pkg/FspSecCore/SecMain.c
@@ -1,13 +1,7 @@
 /** @file\r
 \r
-  Copyright (c) 2014 - 2018, Intel Corporation. All rights reserved.<BR>\r
-  This program and the accompanying materials\r
-  are licensed and made available under the terms and conditions of the BSD License\r
-  which accompanies this distribution.  The full text of the license may be found at\r
-  http://opensource.org/licenses/bsd-license.php.\r
-\r
-  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
-  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
+  Copyright (c) 2014 - 2019, Intel Corporation. All rights reserved.<BR>\r
+  SPDX-License-Identifier: BSD-2-Clause-Patent\r
 \r
 **/\r
 \r
@@ -83,7 +77,29 @@ SecStartup (
   //\r
   InitializeFloatingPointUnits ();\r
 \r
+  //\r
+  // Scenario 1 memory map when running on bootloader stack\r
+  //\r
+  // |-------------------|---->\r
+  // |Idt Table          |\r
+  // |-------------------|\r
+  // |PeiService Pointer |\r
+  // |-------------------|\r
+  // |                   |\r
+  // |                   |\r
+  // |      Heap         |\r
+  // |                   |\r
+  // |                   |\r
+  // |-------------------|---->  TempRamBase\r
+  //\r
+  //\r
+  // |-------------------|\r
+  // |Bootloader stack   |----> somewhere in memory, FSP will share this stack.\r
+  // |-------------------|\r
 \r
+  //\r
+  // Scenario 2 memory map when running FSP on a separate stack\r
+  //\r
   // |-------------------|---->\r
   // |Idt Table          |\r
   // |-------------------|\r
@@ -100,22 +116,22 @@ SecStartup (
   // |-------------------|---->  TempRamBase\r
   IdtTableInStack.PeiService  = NULL;\r
   AsmReadIdtr (&IdtDescriptor);\r
-  if ((IdtDescriptor.Base == 0) && (IdtDescriptor.Limit == 0xFFFF)) {\r
+  if (IdtDescriptor.Base == 0) {\r
     ExceptionHandler = FspGetExceptionHandler(mIdtEntryTemplate);\r
     for (Index = 0; Index < FixedPcdGet8(PcdFspMaxInterruptSupported); Index ++) {\r
       CopyMem ((VOID*)&IdtTableInStack.IdtTable[Index], (VOID*)&ExceptionHandler, sizeof (UINT64));\r
     }\r
     IdtSize = sizeof (IdtTableInStack.IdtTable);\r
   } else {\r
-    if (IdtDescriptor.Limit + 1 > sizeof (IdtTableInStack.IdtTable)) {\r
+    IdtSize = IdtDescriptor.Limit + 1;\r
+    if (IdtSize > sizeof (IdtTableInStack.IdtTable)) {\r
       //\r
       // ERROR: IDT table size from boot loader is larger than FSP can support, DeadLoop here!\r
       //\r
       CpuDeadLoop();\r
     } else {\r
-      IdtSize = IdtDescriptor.Limit + 1;\r
+      CopyMem ((VOID *) (UINTN) &IdtTableInStack.IdtTable, (VOID *) IdtDescriptor.Base, IdtSize);\r
     }\r
-    CopyMem ((VOID *) (UINTN) &IdtTableInStack.IdtTable, (VOID *) IdtDescriptor.Base, IdtSize);\r
   }\r
   IdtDescriptor.Base  = (UINTN) &IdtTableInStack.IdtTable;\r
   IdtDescriptor.Limit = (UINT16)(IdtSize - 1);\r
@@ -135,11 +151,19 @@ SecStartup (
   SecCoreData.BootFirmwareVolumeSize = (UINT32)((EFI_FIRMWARE_VOLUME_HEADER *)BootFirmwareVolume)->FvLength;\r
 \r
   SecCoreData.TemporaryRamBase       = (VOID*)(UINTN) TempRamBase;\r
-  SecCoreData.TemporaryRamSize       = SizeOfRam;\r
-  SecCoreData.PeiTemporaryRamBase    = SecCoreData.TemporaryRamBase;\r
-  SecCoreData.PeiTemporaryRamSize    = SecCoreData.TemporaryRamSize * PcdGet8 (PcdFspHeapSizePercentage) / 100;\r
-  SecCoreData.StackBase              = (VOID*)(UINTN)((UINTN)SecCoreData.TemporaryRamBase + SecCoreData.PeiTemporaryRamSize);\r
-  SecCoreData.StackSize              = SecCoreData.TemporaryRamSize - SecCoreData.PeiTemporaryRamSize;\r
+  if (PcdGet8 (PcdFspHeapSizePercentage) == 0) {\r
+    SecCoreData.TemporaryRamSize       = SizeOfRam; // stack size that is going to be copied to the permanent memory\r
+    SecCoreData.PeiTemporaryRamBase    = SecCoreData.TemporaryRamBase;\r
+    SecCoreData.PeiTemporaryRamSize    = SecCoreData.TemporaryRamSize;\r
+    SecCoreData.StackBase              = (VOID *)GetFspEntryStack(); // Share the same boot loader stack\r
+    SecCoreData.StackSize              = 0;\r
+  } else {\r
+    SecCoreData.TemporaryRamSize       = SizeOfRam;\r
+    SecCoreData.PeiTemporaryRamBase    = SecCoreData.TemporaryRamBase;\r
+    SecCoreData.PeiTemporaryRamSize    = SecCoreData.TemporaryRamSize * PcdGet8 (PcdFspHeapSizePercentage) / 100;\r
+    SecCoreData.StackBase              = (VOID*)(UINTN)((UINTN)SecCoreData.TemporaryRamBase + SecCoreData.PeiTemporaryRamSize);\r
+    SecCoreData.StackSize              = SecCoreData.TemporaryRamSize - SecCoreData.PeiTemporaryRamSize;\r
+  }\r
 \r
   DEBUG ((DEBUG_INFO, "Fsp BootFirmwareVolumeBase - 0x%x\n", SecCoreData.BootFirmwareVolumeBase));\r
   DEBUG ((DEBUG_INFO, "Fsp BootFirmwareVolumeSize - 0x%x\n", SecCoreData.BootFirmwareVolumeSize));\r
@@ -194,15 +218,37 @@ SecTemporaryRamSupport (
   UINTN             HeapSize;\r
   UINTN             StackSize;\r
 \r
-  HeapSize   = CopySize * PcdGet8 (PcdFspHeapSizePercentage) / 100 ;\r
-  StackSize  = CopySize - HeapSize;\r
+  UINTN             CurrentStack;\r
+  UINTN             FspStackBase;\r
+\r
+  if (PcdGet8 (PcdFspHeapSizePercentage) == 0) {\r
 \r
-  OldHeap = (VOID*)(UINTN)TemporaryMemoryBase;\r
-  NewHeap = (VOID*)((UINTN)PermanentMemoryBase + StackSize);\r
+    CurrentStack = AsmReadEsp();\r
+    FspStackBase = (UINTN)GetFspEntryStack();\r
 \r
-  OldStack = (VOID*)((UINTN)TemporaryMemoryBase + HeapSize);\r
-  NewStack = (VOID*)(UINTN)PermanentMemoryBase;\r
+    StackSize = FspStackBase - CurrentStack;\r
+    HeapSize  = CopySize;\r
 \r
+    OldHeap = (VOID*)(UINTN)TemporaryMemoryBase;\r
+    NewHeap = (VOID*)((UINTN)PermanentMemoryBase);\r
+\r
+    OldStack = (VOID*)CurrentStack;\r
+    //\r
+    //The old stack is copied at the end of the stack region because stack grows down.\r
+    //\r
+    NewStack = (VOID*)((UINTN)PermanentMemoryBase - StackSize);\r
+\r
+  } else {\r
+    HeapSize   = CopySize * PcdGet8 (PcdFspHeapSizePercentage) / 100 ;\r
+    StackSize  = CopySize - HeapSize;\r
+\r
+    OldHeap = (VOID*)(UINTN)TemporaryMemoryBase;\r
+    NewHeap = (VOID*)((UINTN)PermanentMemoryBase + StackSize);\r
+\r
+    OldStack = (VOID*)((UINTN)TemporaryMemoryBase + HeapSize);\r
+    NewStack = (VOID*)(UINTN)PermanentMemoryBase;\r
+\r
+  }\r
   //\r
   // Migrate Heap\r
   //\r