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[mirror_edk2.git] / IntelFrameworkModulePkg / Csm / LegacyBiosDxe / LegacyBios.c

diff --git a/IntelFrameworkModulePkg/Csm/LegacyBiosDxe/LegacyBios.c b/IntelFrameworkModulePkg/Csm/LegacyBiosDxe/LegacyBios.c
index 194fee647be416b56779daca0491a53844d831ae..99a76c9f21acdd7b12f340621615c91122af8104 100644 (file)
--- a/IntelFrameworkModulePkg/Csm/LegacyBiosDxe/LegacyBios.c
+++ b/IntelFrameworkModulePkg/Csm/LegacyBiosDxe/LegacyBios.c
@@ -1,6 +1,6 @@
 /** @file\r
 \r
-Copyright (c) 2006 - 2011, Intel Corporation. All rights reserved.<BR>\r
+Copyright (c) 2006 - 2012, Intel Corporation. All rights reserved.<BR>\r
 \r
 This program and the accompanying materials\r
 are licensed and made available under the terms and conditions\r
@@ -682,6 +682,7 @@ LegacyBiosInstall (
   LEGACY_BIOS_INSTANCE               *Private;\r
   EFI_TO_COMPATIBILITY16_INIT_TABLE  *EfiToLegacy16InitTable;\r
   EFI_PHYSICAL_ADDRESS               MemoryAddress;\r
+  EFI_PHYSICAL_ADDRESS               EbdaReservedBaseAddress;\r
   VOID                               *MemoryPtr;\r
   EFI_PHYSICAL_ADDRESS               MemoryAddressUnder1MB;\r
   UINTN                              Index;\r
@@ -695,6 +696,7 @@ LegacyBiosInstall (
   UINT32                             MemorySize;\r
   EFI_GCD_MEMORY_SPACE_DESCRIPTOR    Descriptor;\r
   UINT64                             Length;\r
+  UINT8                              *SecureBoot;\r
 \r
   //\r
   // Load this driver's image to memory\r
@@ -704,6 +706,20 @@ LegacyBiosInstall (
     return Status;\r
   }\r
 \r
+  //\r
+  // When UEFI Secure Boot is enabled, CSM module will not start any more.\r
+  //\r
+  SecureBoot = NULL;\r
+  GetEfiGlobalVariable2 (EFI_SECURE_BOOT_MODE_NAME, (VOID**)&SecureBoot, NULL);\r
+  if ((SecureBoot != NULL) && (*SecureBoot == SECURE_BOOT_MODE_ENABLE)) {\r
+    FreePool (SecureBoot);\r
+    return EFI_SECURITY_VIOLATION;\r
+  }\r
+  \r
+  if (SecureBoot != NULL) {\r
+    FreePool (SecureBoot);\r
+  }\r
+\r
   Private = &mPrivateData;\r
   ZeroMem (Private, sizeof (LEGACY_BIOS_INSTANCE));\r
 \r
@@ -865,9 +881,21 @@ LegacyBiosInstall (
   //\r
   // Allocate all 32k chunks from 0x60000 ~ 0x88000 for Legacy OPROMs that\r
   // don't use PMM but look for zeroed memory. Note that various non-BBS\r
-  // SCSIs expect different areas to be free\r
+  // OpROMs expect different areas to be free\r
+  //\r
+  EbdaReservedBaseAddress = MemoryAddress;\r
+  MemoryAddress = PcdGet32 (PcdOpromReservedMemoryBase);\r
+  MemorySize    = PcdGet32 (PcdOpromReservedMemorySize);\r
+  //\r
+  // Check if base address and size for reserved memory are 4KB aligned.\r
+  //\r
+  ASSERT ((MemoryAddress & 0xFFF) == 0);\r
+  ASSERT ((MemorySize & 0xFFF) == 0);\r
+  //\r
+  // Check if the reserved memory is below EBDA reserved range.\r
   //\r
-  for (MemStart = 0x60000; MemStart < 0x88000; MemStart += 0x1000) {\r
+  ASSERT ((MemoryAddress < EbdaReservedBaseAddress) && ((MemoryAddress + MemorySize - 1) < EbdaReservedBaseAddress));\r
+  for (MemStart = MemoryAddress; MemStart < MemoryAddress + MemorySize; MemStart += 0x1000) {\r
     Status = AllocateLegacyMemory (\r
                AllocateAddress,\r
                MemStart,\r
@@ -922,21 +950,32 @@ LegacyBiosInstall (
   EfiToLegacy16InitTable->LowPmmMemory            = (UINT32) MemoryAddressUnder1MB;\r
   EfiToLegacy16InitTable->LowPmmMemorySizeInBytes = MemorySize;\r
 \r
+  MemorySize = PcdGet32 (PcdHighPmmMemorySize);\r
+  ASSERT ((MemorySize & 0xFFF) == 0);\r
   //\r
   // Allocate high PMM Memory under 16 MB\r
-  //\r
-  MemorySize = PcdGet32 (PcdHighPmmMemorySize);\r
-  ASSERT ((MemorySize & 0xFFF) == 0);    \r
+  //   \r
   Status = AllocateLegacyMemory (\r
              AllocateMaxAddress,\r
              0x1000000,\r
              EFI_SIZE_TO_PAGES (MemorySize),\r
              &MemoryAddress\r
              );\r
+  if (EFI_ERROR (Status)) {\r
+    //\r
+    // If it fails, allocate high PMM Memory under 4GB\r
+    //   \r
+    Status = AllocateLegacyMemory (\r
+               AllocateMaxAddress,\r
+               0xFFFFFFFF,\r
+               EFI_SIZE_TO_PAGES (MemorySize),\r
+               &MemoryAddress\r
+               );    \r
+  }\r
   if (!EFI_ERROR (Status)) {\r
     EfiToLegacy16InitTable->HiPmmMemory            = (UINT32) (EFI_PHYSICAL_ADDRESS) (UINTN) MemoryAddress;\r
     EfiToLegacy16InitTable->HiPmmMemorySizeInBytes = MemorySize;\r
-  }\r
+  } \r
 \r
   //\r
   //  ShutdownAPs();\r