1 files changed, 34 insertions, 0 deletions
diff --git a/IntelFsp2Pkg/FspSecCore/X64/FspHelper.nasm b/IntelFsp2Pkg/FspSecCore/X64/FspHelper.nasm
new file mode 100644
index 0000000000..122fa1d174
--- /dev/null
+++ b/IntelFsp2Pkg/FspSecCore/X64/FspHelper.nasm
@@ -0,0 +1,34 @@
+;; @file
+;  Provide FSP helper function.
+;
+; Copyright (c) 2022, Intel Corporation. All rights reserved.<BR>
+; SPDX-License-Identifier: BSD-2-Clause-Patent
+;;
+    DEFAULT  REL
+    SECTION .text
+
+global ASM_PFX(AsmGetFspBaseAddress)
+ASM_PFX(AsmGetFspBaseAddress):
+   call  ASM_PFX(AsmGetFspInfoHeader)
+   add   rax, 0x1C
+   mov   eax, [rax]
+   ret
+
+global ASM_PFX(AsmGetFspInfoHeader)
+ASM_PFX(AsmGetFspInfoHeader):
+   lea   rax, [ASM_PFX(AsmGetFspInfoHeader)]
+   DB    0x48, 0x2d               ; sub rax, 0x????????
+global ASM_PFX(FspInfoHeaderRelativeOff)
+ASM_PFX(FspInfoHeaderRelativeOff):
+   DD    0x12345678               ; This value must be patched by the build script
+   and   rax, 0xffffffff
+   ret
+
+global ASM_PFX(AsmGetFspInfoHeaderNoStack)
+ASM_PFX(AsmGetFspInfoHeaderNoStack):
+   lea   rax, [ASM_PFX(AsmGetFspInfoHeader)]
+   lea   rcx, [ASM_PFX(FspInfoHeaderRelativeOff)]
+   mov   ecx, [rcx]
+   sub   rax, rcx
+   and   rax, 0xffffffff
+   jmp   rdi