diff options
Diffstat (limited to 'EDK/Foundation/Library/Pei/PeiLib/ia32/ProcessorAsms.Asm')
| -rw-r--r-- | EDK/Foundation/Library/Pei/PeiLib/ia32/ProcessorAsms.Asm | 223 |
1 files changed, 223 insertions, 0 deletions
diff --git a/EDK/Foundation/Library/Pei/PeiLib/ia32/ProcessorAsms.Asm b/EDK/Foundation/Library/Pei/PeiLib/ia32/ProcessorAsms.Asm new file mode 100644 index 0000000..86f4606 --- /dev/null +++ b/EDK/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 + |