mirror of
https://github.com/CloverHackyColor/CloverBootloader.git
synced 2024-12-01 12:53:27 +01:00
69 lines
2.4 KiB
NASM
69 lines
2.4 KiB
NASM
|
;------------------------------------------------------------------------------
|
||
|
|
;*
|
||
|
|
;* Copyright (c) 2006 - 2013, Intel Corporation. All rights reserved.<BR>
|
||
|
|
;* SPDX-License-Identifier: BSD-2-Clause-Patent
|
||
|
|
;*
|
||
|
|
;* CpuAsm.asm
|
||
|
|
;*
|
||
|
|
;* Abstract:
|
||
|
|
;*
|
||
|
|
;------------------------------------------------------------------------------
|
||
|
|
|
||
|
|
#include <Base.h>
|
||
|
|
|
||
|
|
SECTION .text
|
||
|
|
|
||
|
|
extern ASM_PFX(SecCoreStartupWithStack)
|
||
|
|
|
||
|
|
;
|
||
|
|
; SecCore Entry Point
|
||
|
|
;
|
||
|
|
; Processor is in flat protected mode
|
||
|
|
;
|
||
|
|
; @param[in] EAX Initial value of the EAX register (BIST: Built-in Self Test)
|
||
|
|
; @param[in] DI 'BP': boot-strap processor, or 'AP': application processor
|
||
|
|
; @param[in] EBP Pointer to the start of the Boot Firmware Volume
|
||
|
|
; @param[in] DS Selector allowing flat access to all addresses
|
||
|
|
; @param[in] ES Selector allowing flat access to all addresses
|
||
|
|
; @param[in] FS Selector allowing flat access to all addresses
|
||
|
|
; @param[in] GS Selector allowing flat access to all addresses
|
||
|
|
; @param[in] SS Selector allowing flat access to all addresses
|
||
|
|
;
|
||
|
|
; @return None This routine does not return
|
||
|
|
;
|
||
|
|
global ASM_PFX(_ModuleEntryPoint)
|
||
|
|
ASM_PFX(_ModuleEntryPoint):
|
||
|
|
|
||
|
|
;
|
||
|
|
; Fill the temporary RAM with the initial stack value.
|
||
|
|
; The loop below will seed the heap as well, but that's harmless.
|
||
|
|
;
|
||
|
|
mov eax, FixedPcdGet32 (PcdInitValueInTempStack) ; dword to store
|
||
|
|
mov edi, FixedPcdGet32 (PcdOvmfSecPeiTempRamBase) ; base address,
|
||
|
|
; relative to
|
||
|
|
; ES
|
||
|
|
mov ecx, FixedPcdGet32 (PcdOvmfSecPeiTempRamSize) / 4 ; dword count
|
||
|
|
cld ; store from base
|
||
|
|
; up
|
||
|
|
rep stosd
|
||
|
|
|
||
|
|
;
|
||
|
|
; Load temporary RAM stack based on PCDs
|
||
|
|
;
|
||
|
|
%define SEC_TOP_OF_STACK (FixedPcdGet32 (PcdOvmfSecPeiTempRamBase) + \
|
||
|
|
FixedPcdGet32 (PcdOvmfSecPeiTempRamSize))
|
||
|
|
mov eax, SEC_TOP_OF_STACK
|
||
|
|
mov esp, eax
|
||
|
|
nop
|
||
|
|
|
||
|
|
;
|
||
|
|
; Setup parameters and call SecCoreStartupWithStack
|
||
|
|
; [esp] return address for call
|
||
|
|
; [esp+4] BootFirmwareVolumePtr
|
||
|
|
; [esp+8] TopOfCurrentStack
|
||
|
|
;
|
||
|
|
push eax
|
||
|
|
push ebp
|
||
|
|
call ASM_PFX(SecCoreStartupWithStack)
|
||
|
|
|