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## @file
#
# Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>
# This program and the accompanying materials are licensed and made available under
# the terms and conditions of the BSD License that 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.
#
##
ASM_GLOBAL ASM_PFX(SaMmioRead64)
ASM_PFX(SaMmioRead64):
subl $16, %esp
movq %mm0, (%esp) #Save mm0 on stack
movl 20(%esp), %edx #edx = Address
movq (%edx), %mm0 #mm0 = [Address]
movq %mm0, 8(%esp) #Store mm0 on Stack
movq (%esp), %mm0 #Restore mm0
emms
movl 8(%esp), %eax #eax = [Address][31:0]
movl 12(%esp), %edx #edx = [Address][64:32]
addl $16, %esp
ret
#-----------------------------------------------------------------------------
#
# Section: SaMmioWrite64
#
# Description: Write 64 bits to the Memory Mapped I/O space.
# Use MMX instruction for atomic access, because some MC registers have side effect.
#
# @param[in] Address - Memory mapped I/O address.
# @param[in] Value - The value to write.
#
#-----------------------------------------------------------------------------
#UINT64
#SaMmioWrite64 (
# IN UINTN Address,
# IN UINT64 Value
# )
ASM_GLOBAL ASM_PFX(SaMmioWrite64)
ASM_PFX(SaMmioWrite64):
subl $8, %esp
movq %mm0, (%esp) #Save mm0 on Stack
movl 12(%esp), %edx #edx = Address
movq 16(%esp), %mm0 #mm0 = Value
movq %mm0, (%edx) #[Address] = Value
movq (%esp), %mm0 #Restore mm0
emms
movl 16(%esp), %eax #eax = Value[31:0]
movl 20(%esp), %edx #edx = Value[64:32]
addl $8, %esp
ret
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