878ddf1fc3
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@3 6f19259b-4bc3-4df7-8a09-765794883524
224 lines
5.9 KiB
Plaintext
224 lines
5.9 KiB
Plaintext
;
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; Copyright (c) 2004, Intel Corporation
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; All rights reserved. This program and the accompanying materials
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; are licensed and made available under the terms and conditions of the BSD License
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; which accompanies this distribution. The full text of the license may be found at
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; http://opensource.org/licenses/bsd-license.php
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;
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; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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;
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; Module Name:
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;
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; ProcessorAsms.Asm
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;
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; Abstract:
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; This is separated from processor.c to allow this functions to be built with /O1
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;
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; Notes:
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; - Masm uses "This", "ebx", etc as a directive.
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; - H2INC is still not embedded in our build process so I translated the struc manually.
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; - Unreferenced variables/arguments (This, NewBsp, NewStack) were causing compile errors and
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; did not know of "pragma" mechanism in MASM and I did not want to reduce the warning level.
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; Instead, I did a dummy referenced.
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;
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.686P
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.MMX
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.MODEL SMALL
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.CODE
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EFI_SUCCESS equ 0
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EFI_WARN_RETURN_FROM_LONG_JUMP equ 5
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;
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; Generated by h2inc run manually
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;
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_EFI_JUMP_BUFFER STRUCT 2t
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_ebx DWORD ?
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_esi DWORD ?
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_edi DWORD ?
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_ebp DWORD ?
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_esp DWORD ?
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_eip DWORD ?
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_EFI_JUMP_BUFFER ENDS
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EFI_JUMP_BUFFER TYPEDEF _EFI_JUMP_BUFFER
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TransferControlSetJump PROTO C \
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_This:PTR EFI_PEI_TRANSFER_CONTROL_PROTOCOL, \
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Jump:PTR EFI_JUMP_BUFFER
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TransferControlLongJump PROTO C \
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_This:PTR EFI_PEI_TRANSFER_CONTROL_PROTOCOL, \
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Jump:PTR EFI_JUMP_BUFFER
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SwitchStacks PROTO C \
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EntryPoint:PTR DWORD, \
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Parameter:DWORD, \
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NewStack:PTR DWORD, \
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NewBsp:PTR DWORD
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SwitchIplStacks PROTO C \
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EntryPoint:PTR DWORD, \
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Parameter1:DWORD, \
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Parameter2:DWORD, \
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NewStack:PTR DWORD, \
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NewBsp:PTR DWORD
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;
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;Routine Description:
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;
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; This routine implements the IA32 variant of the SetJump call. Its
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; responsibility is to store system state information for a possible
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; subsequent LongJump.
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;
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;Arguments:
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;
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; Pointer to CPU context save buffer.
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;
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;Returns:
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;
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; EFI_SUCCESS
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;
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TransferControlSetJump PROC C \
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_This:PTR EFI_PEI_TRANSFER_CONTROL_PROTOCOL, \
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Jump:PTR EFI_JUMP_BUFFER
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mov eax, _This
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mov ecx, Jump
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mov (EFI_JUMP_BUFFER PTR [ecx])._ebx, ebx
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mov (EFI_JUMP_BUFFER PTR [ecx])._esi, esi
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mov (EFI_JUMP_BUFFER PTR [ecx])._edi, edi
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mov eax, [ebp]
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mov (EFI_JUMP_BUFFER PTR [ecx])._ebp, eax
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lea eax, [ebp+4]
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mov (EFI_JUMP_BUFFER PTR [ecx])._esp, eax
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mov eax, [ebp+4]
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mov (EFI_JUMP_BUFFER PTR [ecx])._eip, eax
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mov eax, EFI_SUCCESS
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ret
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TransferControlSetJump ENDP
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;
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; Routine Description:
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;
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; This routine implements the IA32 variant of the LongJump call. Its
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; responsibility is restore the system state to the Context Buffer and
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; pass control back.
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;
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; Arguments:
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;
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; Pointer to CPU context save buffer.
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;
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; Returns:
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;
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; EFI_WARN_RETURN_FROM_LONG_JUMP
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;
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TransferControlLongJump PROC C \
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_This:PTR EFI_PEI_TRANSFER_CONTROL_PROTOCOL, \
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Jump:PTR EFI_JUMP_BUFFER
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push ebx
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push esi
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push edi
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mov eax, _This
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; set return from SetJump to EFI_WARN_RETURN_FROM_LONG_JUMP
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mov eax, EFI_WARN_RETURN_FROM_LONG_JUMP
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mov ecx, Jump
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mov ebx, (EFI_JUMP_BUFFER PTR [ecx])._ebx
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mov esi, (EFI_JUMP_BUFFER PTR [ecx])._esi
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mov edi, (EFI_JUMP_BUFFER PTR [ecx])._edi
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mov ebp, (EFI_JUMP_BUFFER PTR [ecx])._ebp
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mov esp, (EFI_JUMP_BUFFER PTR [ecx])._esp
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add esp, 4 ;pop the eip
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jmp DWORD PTR (EFI_JUMP_BUFFER PTR [ecx])._eip
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mov eax, EFI_WARN_RETURN_FROM_LONG_JUMP
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pop edi
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pop esi
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pop ebx
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ret
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TransferControlLongJump ENDP
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;
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; Routine Description:
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; This allows the caller to switch the stack and goes to the new entry point
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;
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; Arguments:
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; EntryPoint - Pointer to the location to enter
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; Parameter - Parameter to pass in
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; NewStack - New Location of the stack
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; NewBsp - New BSP
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;
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; Returns:
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;
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; Nothing. Goes to the Entry Point passing in the new parameters
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;
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SwitchStacks PROC C \
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EntryPoint:PTR DWORD, \
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Parameter:DWORD, \
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NewStack:PTR DWORD, \
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NewBsp:PTR DWORD
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push ebx
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mov eax, NewBsp
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mov ebx, Parameter
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mov ecx, EntryPoint
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mov eax, NewStack
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mov esp, eax
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push ebx
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push 0
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jmp ecx
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pop ebx
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ret
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SwitchStacks ENDP
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;
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; Routine Description:
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; This allows the caller to switch the stack and goes to the new entry point
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;
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; Arguments:
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; EntryPoint - Pointer to the location to enter
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; Parameter1/Parameter2 - Parameter to pass in
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; NewStack - New Location of the stack
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; NewBsp - New BSP
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;
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; Returns:
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;
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; Nothing. Goes to the Entry Point passing in the new parameters
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;
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SwitchIplStacks PROC C \
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EntryPoint:PTR DWORD, \
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Parameter1:DWORD, \
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Parameter2:DWORD, \
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NewStack:PTR DWORD, \
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NewBsp:PTR DWORD
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push ebx
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mov eax, NewBsp
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mov ebx, Parameter1
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mov edx, Parameter2
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mov ecx, EntryPoint
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mov eax, NewStack
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mov esp, eax
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push edx
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push ebx
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call ecx
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pop ebx
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ret
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SwitchIplStacks ENDP
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END
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