| 1 | ;------------------------------------------------------------------------------
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| 2 | ;*
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| 3 | ;* Copyright (c) 2006 - 2013, Intel Corporation. All rights reserved.<BR>
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| 4 | ;* This program and the accompanying materials
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| 5 | ;* are licensed and made available under the terms and conditions of the BSD License
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| 6 | ;* which accompanies this distribution. The full text of the license may be found at
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| 7 | ;* http://opensource.org/licenses/bsd-license.php
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| 8 | ;*
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| 9 | ;* THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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| 10 | ;* WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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| 11 | ;*
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| 12 | ;* CpuAsm.asm
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| 13 | ;*
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| 14 | ;* Abstract:
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| 15 | ;*
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| 16 | ;------------------------------------------------------------------------------
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| 17 |
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| 18 | #include <Base.h>
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| 19 |
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| 20 | SECTION .text
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| 21 |
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| 22 | extern ASM_PFX(SecCoreStartupWithStack)
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| 23 |
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| 24 | ;
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| 25 | ; SecCore Entry Point
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| 26 | ;
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| 27 | ; Processor is in flat protected mode
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| 28 | ;
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| 29 | ; @param[in] EAX Initial value of the EAX register (BIST: Built-in Self Test)
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| 30 | ; @param[in] DI 'BP': boot-strap processor, or 'AP': application processor
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| 31 | ; @param[in] EBP Pointer to the start of the Boot Firmware Volume
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| 32 | ; @param[in] DS Selector allowing flat access to all addresses
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| 33 | ; @param[in] ES Selector allowing flat access to all addresses
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| 34 | ; @param[in] FS Selector allowing flat access to all addresses
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| 35 | ; @param[in] GS Selector allowing flat access to all addresses
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| 36 | ; @param[in] SS Selector allowing flat access to all addresses
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| 37 | ;
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| 38 | ; @return None This routine does not return
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| 39 | ;
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| 40 | global ASM_PFX(_ModuleEntryPoint)
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| 41 | ASM_PFX(_ModuleEntryPoint):
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| 42 |
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| 43 | ;
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| 44 | ; Fill the temporary RAM with the initial stack value.
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| 45 | ; The loop below will seed the heap as well, but that's harmless.
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| 46 | ;
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| 47 | mov eax, FixedPcdGet32 (PcdInitValueInTempStack) ; dword to store
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| 48 | mov edi, FixedPcdGet32 (PcdOvmfSecPeiTempRamBase) ; base address,
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| 49 | ; relative to
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| 50 | ; ES
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| 51 | mov ecx, FixedPcdGet32 (PcdOvmfSecPeiTempRamSize) / 4 ; dword count
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| 52 | cld ; store from base
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| 53 | ; up
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| 54 | rep stosd
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| 55 |
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| 56 | ;
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| 57 | ; Load temporary RAM stack based on PCDs
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| 58 | ;
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| 59 | %define SEC_TOP_OF_STACK (FixedPcdGet32 (PcdOvmfSecPeiTempRamBase) + \
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| 60 | FixedPcdGet32 (PcdOvmfSecPeiTempRamSize))
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| 61 | mov eax, SEC_TOP_OF_STACK
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| 62 | mov esp, eax
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| 63 | nop
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| 64 |
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| 65 | ;
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| 66 | ; Setup parameters and call SecCoreStartupWithStack
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| 67 | ; [esp] return address for call
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| 68 | ; [esp+4] BootFirmwareVolumePtr
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| 69 | ; [esp+8] TopOfCurrentStack
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| 70 | ;
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| 71 | push eax
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| 72 | push ebp
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| 73 | call ASM_PFX(SecCoreStartupWithStack)
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| 74 |
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