diff options
Diffstat (limited to 'IntelFspPkg/FspSecCore/Ia32/FspHelper.asm')
| -rw-r--r-- | IntelFspPkg/FspSecCore/Ia32/FspHelper.asm | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/IntelFspPkg/FspSecCore/Ia32/FspHelper.asm b/IntelFspPkg/FspSecCore/Ia32/FspHelper.asm index 8efea01aae..b991386c77 100644 --- a/IntelFspPkg/FspSecCore/Ia32/FspHelper.asm +++ b/IntelFspPkg/FspSecCore/Ia32/FspHelper.asm @@ -15,6 +15,10 @@ .model flat,C
.code
+;
+; FspInfoHeaderRelativeOff is patched during build process and initialized to offset of the AsmGetFspBaseAddress
+; from the FSP Info header.
+;
FspInfoHeaderRelativeOff PROC NEAR PUBLIC
;
; This value will be pached by the build script
@@ -22,6 +26,11 @@ FspInfoHeaderRelativeOff PROC NEAR PUBLIC DD 012345678h
FspInfoHeaderRelativeOff ENDP
+;
+; Returns FSP Base Address.
+;
+; This function gets the FSP Info Header using relative addressing and returns the FSP Base from the header structure
+;
AsmGetFspBaseAddress PROC NEAR PUBLIC
mov eax, AsmGetFspBaseAddress
sub eax, dword ptr [FspInfoHeaderRelativeOff]
@@ -30,10 +39,35 @@ AsmGetFspBaseAddress PROC NEAR PUBLIC ret
AsmGetFspBaseAddress ENDP
+;
+; No stack counter part of AsmGetFspBaseAddress. Return address is in edi.
+;
+AsmGetFspBaseAddressNoStack PROC NEAR PUBLIC
+ mov eax, AsmGetFspBaseAddress
+ sub eax, dword ptr [FspInfoHeaderRelativeOff]
+ add eax, 01Ch
+ mov eax, dword ptr [eax]
+ jmp edi
+AsmGetFspBaseAddressNoStack ENDP
+
+;
+; Returns FSP Info Header.
+;
+; This function gets the FSP Info Header using relative addressing and returns it
+;
AsmGetFspInfoHeader PROC NEAR PUBLIC
mov eax, AsmGetFspBaseAddress
sub eax, dword ptr [FspInfoHeaderRelativeOff]
ret
AsmGetFspInfoHeader ENDP
+;
+; No stack counter part of AsmGetFspInfoHeader. Return address is in edi.
+;
+AsmGetFspInfoHeaderNoStack PROC NEAR PUBLIC
+ mov eax, AsmGetFspBaseAddress
+ sub eax, dword ptr [FspInfoHeaderRelativeOff]
+ jmp edi
+AsmGetFspInfoHeaderNoStack ENDP
+
END
\ No newline at end of file |