X-Git-Url: https://git.proxmox.com/?p=mirror_edk2.git;a=blobdiff_plain;f=IntelFspPkg%2FFspSecCore%2FIa32%2FFspHelper.s;h=55d8ae75c0df50d13a9d33984c021cf9e879b1b6;hp=a6cf36259d69a4511a459e6f7862e6cb76122a55;hb=f0abe42fd77c07ea06b24efe5bf861f5c49c8559;hpb=e7401ee1af263ff946a57f047124241fa4f01cd5

diff --git a/IntelFspPkg/FspSecCore/Ia32/FspHelper.s b/IntelFspPkg/FspSecCore/Ia32/FspHelper.s
index a6cf36259d..55d8ae75c0 100644
--- a/IntelFspPkg/FspSecCore/Ia32/FspHelper.s
+++ b/IntelFspPkg/FspSecCore/Ia32/FspHelper.s
@@ -15,6 +15,10 @@
 #
 #------------------------------------------------------------------------------
 
+#
+# FspInfoHeaderRelativeOff is patched during build process and initialized to offset of the  AsmGetFspBaseAddress 
+# from the FSP Info header. 
+#
 ASM_GLOBAL ASM_PFX(FspInfoHeaderRelativeOff)
 ASM_PFX(FspInfoHeaderRelativeOff):
    #
@@ -22,17 +26,46 @@ ASM_PFX(FspInfoHeaderRelativeOff):
    #
    .long    0x012345678
 
-
+#
+# Returns FSP Base Address. 
+#
+# This function gets the FSP Info Header using relative addressing and returns the FSP Base from the header structure
+#
 ASM_GLOBAL ASM_PFX(AsmGetFspBaseAddress)
 ASM_PFX(AsmGetFspBaseAddress):
    mov    $AsmGetFspBaseAddress, %eax
-   sub    $FspInfoHeaderRelativeOff, %eax
+   sub    FspInfoHeaderRelativeOff, %eax
    add    $0x01C, %eax
    mov    (%eax), %eax
    ret
 
+#
+# No stack counter part of AsmGetFspBaseAddress. Return address is in edi.
+#
+ASM_GLOBAL ASM_PFX(AsmGetFspBaseAddressNoStack)
+ASM_PFX(AsmGetFspBaseAddressNoStack):
+   mov    $AsmGetFspBaseAddress, %eax
+   sub    FspInfoHeaderRelativeOff, %eax
+   add    $0x01C, %eax 
+   mov    (%eax), %eax
+   jmp    *%edi
+
+#
+# Returns FSP Info Header. 
+#
+# This function gets the FSP Info Header using relative addressing and returns it
+#
 ASM_GLOBAL ASM_PFX(AsmGetFspInfoHeader)
 ASM_PFX(AsmGetFspInfoHeader):
    mov    $AsmGetFspBaseAddress, %eax
-   sub    $FspInfoHeaderRelativeOff, %eax
+   sub    FspInfoHeaderRelativeOff, %eax
    ret
+   
+#
+# No stack counter part of AsmGetFspInfoHeader. Return address is in edi.
+#
+ASM_GLOBAL ASM_PFX(AsmGetFspInfoHeaderNoStack)
+ASM_PFX(AsmGetFspInfoHeaderNoStack):
+   mov    $AsmGetFspBaseAddress, %eax
+   sub    FspInfoHeaderRelativeOff, %eax
+   jmp    *%edi