diff options
Diffstat (limited to 'EdkCompatibilityPkg/Foundation/Library/Pei/PeiLib/ia32/ProcessorAsms.Asm')
-rw-r--r-- | EdkCompatibilityPkg/Foundation/Library/Pei/PeiLib/ia32/ProcessorAsms.Asm | 223 |
1 files changed, 223 insertions, 0 deletions
diff --git a/EdkCompatibilityPkg/Foundation/Library/Pei/PeiLib/ia32/ProcessorAsms.Asm b/EdkCompatibilityPkg/Foundation/Library/Pei/PeiLib/ia32/ProcessorAsms.Asm new file mode 100644 index 0000000000..bf0d5cbed7 --- /dev/null +++ b/EdkCompatibilityPkg/Foundation/Library/Pei/PeiLib/ia32/ProcessorAsms.Asm @@ -0,0 +1,223 @@ +;
+; Copyright (c) 2004, Intel Corporation
+; All rights reserved. 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.
+;
+; Module Name:
+;
+; ProcessorAsms.Asm
+;
+; Abstract:
+; This is separated from processor.c to allow this functions to be built with /O1
+;
+; Notes:
+; - Masm uses "This", "ebx", etc as a directive.
+; - H2INC is still not embedded in our build process so I translated the struc manually.
+; - Unreferenced variables/arguments (This, NewBsp, NewStack) were causing compile errors and
+; did not know of "pragma" mechanism in MASM and I did not want to reduce the warning level.
+; Instead, I did a dummy referenced.
+;
+
+ .686P
+ .MMX
+ .MODEL SMALL
+ .CODE
+
+EFI_SUCCESS equ 0
+EFI_WARN_RETURN_FROM_LONG_JUMP equ 5
+
+;
+; Generated by h2inc run manually
+;
+_EFI_JUMP_BUFFER STRUCT 2t
+_ebx DWORD ?
+_esi DWORD ?
+_edi DWORD ?
+_ebp DWORD ?
+_esp DWORD ?
+_eip DWORD ?
+_EFI_JUMP_BUFFER ENDS
+
+EFI_JUMP_BUFFER TYPEDEF _EFI_JUMP_BUFFER
+
+TransferControlSetJump PROTO C \
+ _This:PTR EFI_PEI_TRANSFER_CONTROL_PROTOCOL, \
+ Jump:PTR EFI_JUMP_BUFFER
+
+TransferControlLongJump PROTO C \
+ _This:PTR EFI_PEI_TRANSFER_CONTROL_PROTOCOL, \
+ Jump:PTR EFI_JUMP_BUFFER
+
+SwitchStacks PROTO C \
+ EntryPoint:PTR DWORD, \
+ Parameter:DWORD, \
+ NewStack:PTR DWORD, \
+ NewBsp:PTR DWORD
+
+SwitchIplStacks PROTO C \
+ EntryPoint:PTR DWORD, \
+ Parameter1:DWORD, \
+ Parameter2:DWORD, \
+ NewStack:PTR DWORD, \
+ NewBsp:PTR DWORD
+
+;
+;Routine Description:
+;
+; This routine implements the IA32 variant of the SetJump call. Its
+; responsibility is to store system state information for a possible
+; subsequent LongJump.
+;
+;Arguments:
+;
+; Pointer to CPU context save buffer.
+;
+;Returns:
+;
+; EFI_SUCCESS
+;
+TransferControlSetJump PROC C \
+ _This:PTR EFI_PEI_TRANSFER_CONTROL_PROTOCOL, \
+ Jump:PTR EFI_JUMP_BUFFER
+
+ mov eax, _This
+ mov ecx, Jump
+ mov (EFI_JUMP_BUFFER PTR [ecx])._ebx, ebx
+ mov (EFI_JUMP_BUFFER PTR [ecx])._esi, esi
+ mov (EFI_JUMP_BUFFER PTR [ecx])._edi, edi
+ mov eax, [ebp]
+ mov (EFI_JUMP_BUFFER PTR [ecx])._ebp, eax
+ lea eax, [ebp+4]
+ mov (EFI_JUMP_BUFFER PTR [ecx])._esp, eax
+ mov eax, [ebp+4]
+ mov (EFI_JUMP_BUFFER PTR [ecx])._eip, eax
+ mov eax, EFI_SUCCESS
+
+ ret
+
+TransferControlSetJump ENDP
+
+;
+; Routine Description:
+;
+; This routine implements the IA32 variant of the LongJump call. Its
+; responsibility is restore the system state to the Context Buffer and
+; pass control back.
+;
+; Arguments:
+;
+; Pointer to CPU context save buffer.
+;
+; Returns:
+;
+; EFI_WARN_RETURN_FROM_LONG_JUMP
+;
+
+TransferControlLongJump PROC C \
+ _This:PTR EFI_PEI_TRANSFER_CONTROL_PROTOCOL, \
+ Jump:PTR EFI_JUMP_BUFFER
+
+ push ebx
+ push esi
+ push edi
+
+ mov eax, _This
+ ; set return from SetJump to EFI_WARN_RETURN_FROM_LONG_JUMP
+ mov eax, EFI_WARN_RETURN_FROM_LONG_JUMP
+ mov ecx, Jump
+ mov ebx, (EFI_JUMP_BUFFER PTR [ecx])._ebx
+ mov esi, (EFI_JUMP_BUFFER PTR [ecx])._esi
+ mov edi, (EFI_JUMP_BUFFER PTR [ecx])._edi
+ mov ebp, (EFI_JUMP_BUFFER PTR [ecx])._ebp
+ mov esp, (EFI_JUMP_BUFFER PTR [ecx])._esp
+ add esp, 4 ;pop the eip
+ jmp DWORD PTR (EFI_JUMP_BUFFER PTR [ecx])._eip
+ mov eax, EFI_WARN_RETURN_FROM_LONG_JUMP
+
+ pop edi
+ pop esi
+ pop ebx
+ ret
+
+TransferControlLongJump ENDP
+
+;
+; Routine Description:
+; This allows the caller to switch the stack and goes to the new entry point
+;
+; Arguments:
+; EntryPoint - Pointer to the location to enter
+; Parameter - Parameter to pass in
+; NewStack - New Location of the stack
+; NewBsp - New BSP
+;
+; Returns:
+;
+; Nothing. Goes to the Entry Point passing in the new parameters
+;
+SwitchStacks PROC C \
+ EntryPoint:PTR DWORD, \
+ Parameter:DWORD, \
+ NewStack:PTR DWORD, \
+ NewBsp:PTR DWORD
+
+ push ebx
+ mov eax, NewBsp
+ mov ebx, Parameter
+ mov ecx, EntryPoint
+ mov eax, NewStack
+ mov esp, eax
+ push ebx
+ push 0
+ jmp ecx
+
+ pop ebx
+ ret
+
+SwitchStacks ENDP
+
+;
+; Routine Description:
+; This allows the caller to switch the stack and goes to the new entry point
+;
+; Arguments:
+; EntryPoint - Pointer to the location to enter
+; Parameter1/Parameter2 - Parameter to pass in
+; NewStack - New Location of the stack
+; NewBsp - New BSP
+;
+; Returns:
+;
+; Nothing. Goes to the Entry Point passing in the new parameters
+;
+SwitchIplStacks PROC C \
+ EntryPoint:PTR DWORD, \
+ Parameter1:DWORD, \
+ Parameter2:DWORD, \
+ NewStack:PTR DWORD, \
+ NewBsp:PTR DWORD
+
+ push ebx
+ mov eax, NewBsp
+ mov ebx, Parameter1
+ mov edx, Parameter2
+ mov ecx, EntryPoint
+ mov eax, NewStack
+ mov esp, eax
+
+ push edx
+ push ebx
+ call ecx
+
+ pop ebx
+ ret
+
+SwitchIplStacks ENDP
+
+ END
+
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