## @file
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#
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# Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>
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# SPDX-License-Identifier: BSD-2-Clause-Patent
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#
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##
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ASM_GLOBAL ASM_PFX(SaMmioRead64)
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ASM_PFX(SaMmioRead64):
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subl $16, %esp
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movq %mm0, (%esp) #Save mm0 on stack
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movl 20(%esp), %edx #edx = Address
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movq (%edx), %mm0 #mm0 = [Address]
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movq %mm0, 8(%esp) #Store mm0 on Stack
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movq (%esp), %mm0 #Restore mm0
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emms
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movl 8(%esp), %eax #eax = [Address][31:0]
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movl 12(%esp), %edx #edx = [Address][64:32]
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addl $16, %esp
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ret
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#-----------------------------------------------------------------------------
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#
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# Section: SaMmioWrite64
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#
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# Description: Write 64 bits to the Memory Mapped I/O space.
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# Use MMX instruction for atomic access, because some MC registers have side effect.
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#
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# @param[in] Address - Memory mapped I/O address.
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# @param[in] Value - The value to write.
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#
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#-----------------------------------------------------------------------------
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#UINT64
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#SaMmioWrite64 (
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# IN UINTN Address,
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# IN UINT64 Value
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# )
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ASM_GLOBAL ASM_PFX(SaMmioWrite64)
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ASM_PFX(SaMmioWrite64):
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subl $8, %esp
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movq %mm0, (%esp) #Save mm0 on Stack
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movl 12(%esp), %edx #edx = Address
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movq 16(%esp), %mm0 #mm0 = Value
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movq %mm0, (%edx) #[Address] = Value
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movq (%esp), %mm0 #Restore mm0
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emms
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movl 16(%esp), %eax #eax = Value[31:0]
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movl 20(%esp), %edx #edx = Value[64:32]
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addl $8, %esp
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ret
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