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@@ -2,7 +2,7 @@
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; @file
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; Search for the Boot Firmware Volume (BFV) base address
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;
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-; Copyright (c) 2008 - 2009, Intel Corporation. All rights reserved.<BR>
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+; Copyright (c) 2008 - 2022, Intel Corporation. All rights reserved.<BR>
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; SPDX-License-Identifier: BSD-2-Clause-Patent
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;
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;------------------------------------------------------------------------------
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@@ -32,7 +32,6 @@ BITS 32
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Flat32SearchForBfvBase:
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xor eax, eax
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- mov ecx, 3 ; 3: FFS3 GUID, 2: FFS2 GUID, 1: Not Found
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searchingForBfvHeaderLoop:
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;
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; We check for a firmware volume at every 4KB address in the top 16MB
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@@ -40,21 +39,19 @@ searchingForBfvHeaderLoop:
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;
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sub eax, 0x1000
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cmp eax, 0xff000000
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- jb searchingForBfvWithOtherFfsGuid
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- cmp ecx, 3
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- jne searchingForFfs2Guid
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+ jb searchedForBfvHeaderButNotFound
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;
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; Check FFS3 GUID
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;
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cmp dword [eax + 0x10], FFS3_GUID_DWORD0
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- jne searchingForBfvHeaderLoop
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+ jne searchingForFfs2Guid
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cmp dword [eax + 0x14], FFS3_GUID_DWORD1
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- jne searchingForBfvHeaderLoop
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+ jne searchingForFfs2Guid
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cmp dword [eax + 0x18], FFS3_GUID_DWORD2
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- jne searchingForBfvHeaderLoop
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+ jne searchingForFfs2Guid
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cmp dword [eax + 0x1c], FFS3_GUID_DWORD3
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- jne searchingForBfvHeaderLoop
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+ jne searchingForFfs2Guid
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jmp checkingFvLength
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searchingForFfs2Guid:
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@@ -82,12 +79,6 @@ checkingFvLength:
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jmp searchedForBfvHeaderAndItWasFound
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-searchingForBfvWithOtherFfsGuid:
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- xor eax, eax
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- dec ecx
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- cmp ecx, 1
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- jne searchingForBfvHeaderLoop
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-
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searchedForBfvHeaderButNotFound:
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;
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; Hang if the SEC entry point was not found
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