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69 lines
2.4 KiB
NASM
69 lines
2.4 KiB
NASM
;------------------------------------------------------------------------------
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;*
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;* Copyright (c) 2006 - 2013, Intel Corporation. All rights reserved.<BR>
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;* SPDX-License-Identifier: BSD-2-Clause-Patent
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;*
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;* CpuAsm.asm
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;*
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;* Abstract:
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;*
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;------------------------------------------------------------------------------
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#include <Base.h>
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SECTION .text
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extern ASM_PFX(SecCoreStartupWithStack)
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;
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; SecCore Entry Point
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;
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; Processor is in flat protected mode
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;
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; @param[in] EAX Initial value of the EAX register (BIST: Built-in Self Test)
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; @param[in] DI 'BP': boot-strap processor, or 'AP': application processor
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; @param[in] EBP Pointer to the start of the Boot Firmware Volume
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; @param[in] DS Selector allowing flat access to all addresses
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; @param[in] ES Selector allowing flat access to all addresses
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; @param[in] FS Selector allowing flat access to all addresses
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; @param[in] GS Selector allowing flat access to all addresses
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; @param[in] SS Selector allowing flat access to all addresses
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;
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; @return None This routine does not return
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;
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global ASM_PFX(_ModuleEntryPoint)
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ASM_PFX(_ModuleEntryPoint):
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;
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; Fill the temporary RAM with the initial stack value.
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; The loop below will seed the heap as well, but that's harmless.
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;
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mov eax, FixedPcdGet32 (PcdInitValueInTempStack) ; dword to store
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mov edi, FixedPcdGet32 (PcdOvmfSecPeiTempRamBase) ; base address,
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; relative to
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; ES
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mov ecx, FixedPcdGet32 (PcdOvmfSecPeiTempRamSize) / 4 ; dword count
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cld ; store from base
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; up
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rep stosd
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;
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; Load temporary RAM stack based on PCDs
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;
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%define SEC_TOP_OF_STACK (FixedPcdGet32 (PcdOvmfSecPeiTempRamBase) + \
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FixedPcdGet32 (PcdOvmfSecPeiTempRamSize))
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mov eax, SEC_TOP_OF_STACK
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mov esp, eax
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nop
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;
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; Setup parameters and call SecCoreStartupWithStack
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; [esp] return address for call
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; [esp+4] BootFirmwareVolumePtr
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; [esp+8] TopOfCurrentStack
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;
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push eax
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push ebp
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call ASM_PFX(SecCoreStartupWithStack)
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