fce4ecd92c
Initial coreboot UEFI payload code check in. It provides UEFI services on top of coreboot that allows UEFI OS boot. CorebootModulePkg is the source code package of coreboot support modules that will be used to parse the coreboot tables and report memory/io resources. It supports the following features: - Support Unified Extensible Firmware Interface (UEFI) specification 2.4. - Support Platform Initialization(PI) specification 1.3. - Support execution as a coreboot payload. - Support USB 3.0 - Support SATA/ATA devices. - Support EFI aware OS boot. The following features are not supported currently and have not been validated: - GCC Tool Chains - SMM Execution Environment - Security Boot It was tested on a Intel Bay Trail CRB platform. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Maurice Ma <maurice.ma@intel.com> Reviewed-by: Prince Agyeman <prince.agyeman@intel.com> git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@17084 6f19259b-4bc3-4df7-8a09-765794883524
83 lines
2.6 KiB
NASM
83 lines
2.6 KiB
NASM
;------------------------------------------------------------------------------
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;
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; Copyright (c) 2013, Intel Corporation. All rights reserved.<BR>
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; 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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; Abstract:
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;
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; Switch the stack from temporary memory to permenent memory.
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;
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;------------------------------------------------------------------------------
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.586p
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.model flat,C
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.code
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;------------------------------------------------------------------------------
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; VOID
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; EFIAPI
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; SecSwitchStack (
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; UINT32 TemporaryMemoryBase,
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; UINT32 PermenentMemoryBase
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; );
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;------------------------------------------------------------------------------
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SecSwitchStack PROC
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;
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; Save three register: eax, ebx, ecx
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;
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push eax
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push ebx
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push ecx
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push edx
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;
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; !!CAUTION!! this function address's is pushed into stack after
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; migration of whole temporary memory, so need save it to permenent
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; memory at first!
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;
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mov ebx, [esp + 20] ; Save the first parameter
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mov ecx, [esp + 24] ; Save the second parameter
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;
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; Save this function's return address into permenent memory at first.
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; Then, Fixup the esp point to permenent memory
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;
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mov eax, esp
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sub eax, ebx
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add eax, ecx
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mov edx, dword ptr [esp] ; copy pushed register's value to permenent memory
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mov dword ptr [eax], edx
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mov edx, dword ptr [esp + 4]
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mov dword ptr [eax + 4], edx
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mov edx, dword ptr [esp + 8]
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mov dword ptr [eax + 8], edx
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mov edx, dword ptr [esp + 12]
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mov dword ptr [eax + 12], edx
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mov edx, dword ptr [esp + 16] ; Update this function's return address into permenent memory
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mov dword ptr [eax + 16], edx
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mov esp, eax ; From now, esp is pointed to permenent memory
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;
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; Fixup the ebp point to permenent memory
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;
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mov eax, ebp
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sub eax, ebx
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add eax, ecx
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mov ebp, eax ; From now, ebp is pointed to permenent memory
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pop edx
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pop ecx
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pop ebx
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pop eax
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ret
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SecSwitchStack ENDP
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END
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