1 files changed, 110 insertions, 0 deletions
diff --git a/IntelFsp2Pkg/Library/SecFspSecPlatformLibNull/Ia32/Flat32.s b/IntelFsp2Pkg/Library/SecFspSecPlatformLibNull/Ia32/Flat32.s
new file mode 100644
index 0000000000..d46d792477
--- /dev/null
+++ b/IntelFsp2Pkg/Library/SecFspSecPlatformLibNull/Ia32/Flat32.s
@@ -0,0 +1,110 @@
+#------------------------------------------------------------------------------
+#
+# Copyright (c) 2015 - 2016, Intel Corporation. All rights reserved.<BR>
+# This program and the accompanying materials
+# are licensed and made available under the terms and conditions of the BSD License
+# which accompanies this distribution.  The full text of the license may be found at
+# http://opensource.org/licenses/bsd-license.php.
+#
+# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+#
+# Abstract:
+#
+#  This is the code that goes from real-mode to protected mode.
+#  It consumes the reset vector, configures the stack.
+#
+#------------------------------------------------------------------------------
+
+
+#
+# Contrary to the name, this file contains 16 bit code as well.
+#
+.text
+
+ASM_GLOBAL ASM_PFX(SecPlatformInit)
+ASM_PFX(SecPlatformInit):
+  movd    %mm7, %esi                      # restore ESP from MM7
+  jmp     *%esi
+
+#----------------------------------------------------------------------------
+#
+# Procedure:    ProtectedModeEntryPoint
+#
+# Input:        Executing in 32 Bit Protected (flat) mode
+#               cs: 0-4GB
+#               ds: 0-4GB
+#               es: 0-4GB
+#               fs: 0-4GB
+#               gs: 0-4GB
+#               ss: 0-4GB
+#
+# Output:       This function never returns
+#
+# Destroys:
+#               ecx
+#               edi
+#               esi
+#               esp
+#
+# Description:
+#               Perform any essential early platform initilaisation
+#               Setup a stack
+#
+#----------------------------------------------------------------------------
+ProtectedModeEntryPoint:
+  #
+  # Dummy function. Consume 2 API to make sure they can be linked.
+  #
+  movl   ASM_PFX(TempRamInitApi), %eax
+  #
+  # Should never return
+  #
+  jmp     . #'$'
+
+#
+# ROM-based Global-Descriptor Table for the PEI Phase
+#
+.align 16
+#
+# GDT[0]: 000h: Null entry, never used.
+#
+.equ   NULL_SEL, . - GDT_BASE         # Selector [0]
+GDT_BASE: 
+BootGdtTable:   
+        .long   0
+        .long   0
+#
+# Linear code segment descriptor
+#
+.equ     LINEAR_CODE_SEL, . - GDT_BASE         # Selector [08h]
+        .word   0xFFFF                      # limit 0FFFFh
+        .word   0                           # base 0
+        .byte   0
+        .byte   0x9B                        # present, ring 0, data, expand-up, not-writable
+        .byte   0xCF                        # page-granular, 32-bit
+        .byte   0
+#
+# System data segment descriptor
+#
+.equ    SYS_DATA_SEL, . - GDT_BASE         # Selector [010h]
+        .word   0xFFFF                      # limit 0FFFFh
+        .word   0                           # base 0
+        .byte   0
+        .byte   0x93                        # present, ring 0, data, expand-up, not-writable
+        .byte   0xCF                        # page-granular, 32-bit
+        .byte   0
+
+.equ            GDT_SIZE, . - BootGdtTable  # Size, in bytes
+
+#
+# GDT Descriptor
+#
+GdtDesc:                                     # GDT descriptor
+       .word    GDT_SIZE - 1               
+       .long    BootGdtTable        
+
+ProtectedModeEntryLinearAddress:
+ProtectedModeEntryLinearOffset:
+       .long    ProtectedModeEntryPoint
+       .word    LINEAR_CODE_SEL