| 1 | ;------------------------------------------------------------------------------
|
|---|
| 2 | ;*
|
|---|
| 3 | ;* Copyright (c) 2006 - 2013, Intel Corporation. All rights reserved.<BR>
|
|---|
| 4 | ;* SPDX-License-Identifier: BSD-2-Clause-Patent
|
|---|
| 5 | ;*
|
|---|
| 6 | ;* CpuAsm.asm
|
|---|
| 7 | ;*
|
|---|
| 8 | ;* Abstract:
|
|---|
| 9 | ;*
|
|---|
| 10 | ;------------------------------------------------------------------------------
|
|---|
| 11 |
|
|---|
| 12 | #include <Base.h>
|
|---|
| 13 |
|
|---|
| 14 | SECTION .text
|
|---|
| 15 |
|
|---|
| 16 | extern ASM_PFX(SecCoreStartupWithStack)
|
|---|
| 17 |
|
|---|
| 18 | ;
|
|---|
| 19 | ; SecCore Entry Point
|
|---|
| 20 | ;
|
|---|
| 21 | ; Processor is in flat protected mode
|
|---|
| 22 | ;
|
|---|
| 23 | ; @param[in] EAX Initial value of the EAX register (BIST: Built-in Self Test)
|
|---|
| 24 | ; @param[in] DI 'BP': boot-strap processor, or 'AP': application processor
|
|---|
| 25 | ; @param[in] EBP Pointer to the start of the Boot Firmware Volume
|
|---|
| 26 | ; @param[in] DS Selector allowing flat access to all addresses
|
|---|
| 27 | ; @param[in] ES Selector allowing flat access to all addresses
|
|---|
| 28 | ; @param[in] FS Selector allowing flat access to all addresses
|
|---|
| 29 | ; @param[in] GS Selector allowing flat access to all addresses
|
|---|
| 30 | ; @param[in] SS Selector allowing flat access to all addresses
|
|---|
| 31 | ;
|
|---|
| 32 | ; @return None This routine does not return
|
|---|
| 33 | ;
|
|---|
| 34 | global ASM_PFX(_ModuleEntryPoint)
|
|---|
| 35 | ASM_PFX(_ModuleEntryPoint):
|
|---|
| 36 |
|
|---|
| 37 | ;
|
|---|
| 38 | ; Fill the temporary RAM with the initial stack value.
|
|---|
| 39 | ; The loop below will seed the heap as well, but that's harmless.
|
|---|
| 40 | ;
|
|---|
| 41 | mov eax, FixedPcdGet32 (PcdInitValueInTempStack) ; dword to store
|
|---|
| 42 | mov edi, FixedPcdGet32 (PcdOvmfSecPeiTempRamBase) ; base address,
|
|---|
| 43 | ; relative to
|
|---|
| 44 | ; ES
|
|---|
| 45 | mov ecx, FixedPcdGet32 (PcdOvmfSecPeiTempRamSize) / 4 ; dword count
|
|---|
| 46 | cld ; store from base
|
|---|
| 47 | ; up
|
|---|
| 48 | rep stosd
|
|---|
| 49 |
|
|---|
| 50 | ;
|
|---|
| 51 | ; Load temporary RAM stack based on PCDs
|
|---|
| 52 | ;
|
|---|
| 53 | %define SEC_TOP_OF_STACK (FixedPcdGet32 (PcdOvmfSecPeiTempRamBase) + \
|
|---|
| 54 | FixedPcdGet32 (PcdOvmfSecPeiTempRamSize))
|
|---|
| 55 | mov eax, SEC_TOP_OF_STACK
|
|---|
| 56 | mov esp, eax
|
|---|
| 57 | nop
|
|---|
| 58 |
|
|---|
| 59 | ;
|
|---|
| 60 | ; Setup parameters and call SecCoreStartupWithStack
|
|---|
| 61 | ; [esp] return address for call
|
|---|
| 62 | ; [esp+4] BootFirmwareVolumePtr
|
|---|
| 63 | ; [esp+8] TopOfCurrentStack
|
|---|
| 64 | ;
|
|---|
| 65 | push eax
|
|---|
| 66 | push ebp
|
|---|
| 67 | call ASM_PFX(SecCoreStartupWithStack)
|
|---|
| 68 |
|
|---|
