[mirror_edk2.git] / OvmfPkg / Sec / X64 / SecEntry.S

#      TITLE   SecEntry.asm
#------------------------------------------------------------------------------
#*
#*   Copyright 2006 - 2009, Intel Corporation
#*   All rights reserved. This program and the accompanying materials
#*   are licensed and made available under the terms and conditions of the BSD License
#*   which accompanies this distribution.  The full text of the license may be found at
#*   http://opensource.org/licenses/bsd-license.php
#*
#*   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
#*   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
#*
#*    CpuAsm.asm
#*
#*   Abstract:
#*
#------------------------------------------------------------------------------


#include "SecMain.h"

#EXTERN ASM_PFX(SecCoreStartupWithStack)

#
# SecCore Entry Point
#
# Processor is in flat protected mode
#
# @param[in]  RAX   Initial value of the EAX register (BIST: Built-in Self Test)
# @param[in]  DI    'BP': boot-strap processor, or 'AP': application processor
# @param[in]  RBP   Pointer to the start of the Boot Firmware Volume
#
# @return     None  This routine does not return
#
ASM_GLOBAL ASM_PFX(_ModuleEntryPoint)
ASM_PFX(_ModuleEntryPoint):

    #
    # Load temporary stack top at very low memory.  The C code
    # can reload to a better address.
    #
    movq    $INITIAL_TOP_OF_STACK, %rsp 
    nop

    #
    # Setup parameters and call SecCoreStartupWithStack
    #   rcx: BootFirmwareVolumePtr
    #   rdx: TopOfCurrentStack
    #
    movq    %rbp, %rcx
    movq    %rsp, %rdx
    subq    $0x20, %rsp
    call    ASM_PFX(SecCoreStartupWithStack)
Commit	Line	Data
	1	# TITLE SecEntry.asm
	2	#------------------------------------------------------------------------------
	3	#*
	4	#* Copyright 2006 - 2009, Intel Corporation
	5	#* All rights reserved. This program and the accompanying materials
	6	#* are licensed and made available under the terms and conditions of the BSD License
	7	#* which accompanies this distribution. The full text of the license may be found at
	8	#* http://opensource.org/licenses/bsd-license.php
	9	#*
	10	#* THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
	11	#* WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
	12	#*
	13	#* CpuAsm.asm
	14	#*
	15	#* Abstract:
	16	#*
	17	#------------------------------------------------------------------------------
	18
	19
	20	#include "SecMain.h"
	21
	22	#EXTERN ASM_PFX(SecCoreStartupWithStack)
	23
	24	#
	25	# SecCore Entry Point
	26	#
	27	# Processor is in flat protected mode
	28	#
	29	# @param[in] RAX Initial value of the EAX register (BIST: Built-in Self Test)
	30	# @param[in] DI 'BP': boot-strap processor, or 'AP': application processor
	31	# @param[in] RBP Pointer to the start of the Boot Firmware Volume
	32	#
	33	# @return None This routine does not return
	34	#
	35	ASM_GLOBAL ASM_PFX(_ModuleEntryPoint)
	36	ASM_PFX(_ModuleEntryPoint):
	37
	38	#
	39	# Load temporary stack top at very low memory. The C code
	40	# can reload to a better address.
	41	#
	42	movq $INITIAL_TOP_OF_STACK, %rsp
	43	nop
	44
	45	#
	46	# Setup parameters and call SecCoreStartupWithStack
	47	# rcx: BootFirmwareVolumePtr
	48	# rdx: TopOfCurrentStack
	49	#
	50	movq %rbp, %rcx
	51	movq %rsp, %rdx
	52	subq $0x20, %rsp
	53	call ASM_PFX(SecCoreStartupWithStack)
	54