1fd376d979
KVM can substantially boost the speed of the rep insb/insw/insl and rep outsb/outsw/outsl instructions by transferring up to a page of data per VM trap. This change adds assembly handling of the PCI Host Bridge I/O FIFO Reads and Writes. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Jordan Justen <jordan.l.justen@intel.com> Reviewed-by: Ruiyu Ni <ruiyu.ni@intel.com> git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@13424 6f19259b-4bc3-4df7-8a09-765794883524
122 lines
4.3 KiB
ArmAsm
122 lines
4.3 KiB
ArmAsm
#------------------------------------------------------------------------------
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#
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# Copyright (c) 2006 - 2012, Intel Corporation. All rights reserved.<BR>
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# This program and the accompanying materials
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# are licensed and made available under the terms and conditions of the BSD License
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# which accompanies this distribution. The full text of the license may be found at
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# http://opensource.org/licenses/bsd-license.php.
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#
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# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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#
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#------------------------------------------------------------------------------
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#------------------------------------------------------------------------------
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# VOID
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# EFIAPI
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# IoReadFifo8 (
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# IN UINTN Port, // rcx
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# IN UINTN Count, // rdx
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# IN VOID *Buffer // r8
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# );
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#------------------------------------------------------------------------------
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ASM_GLOBAL ASM_PFX(IoReadFifo8)
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ASM_PFX(IoReadFifo8):
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cld
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xchg %rcx, %rdx
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xchg %r8, %rdi # rdi: buffer address; r8: save register
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rep insb
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mov %r8, %rdi # restore rdi
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ret
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#------------------------------------------------------------------------------
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# VOID
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# EFIAPI
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# IoReadFifo16 (
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# IN UINTN Port, // rcx
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# IN UINTN Count, // rdx
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# IN VOID *Buffer // r8
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# );
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#------------------------------------------------------------------------------
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ASM_GLOBAL ASM_PFX(IoReadFifo16)
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ASM_PFX(IoReadFifo16):
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cld
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xchg %rcx, %rdx
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xchg %r8, %rdi # rdi: buffer address; r8: save register
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rep insw
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mov %r8, %rdi # restore rdi
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ret
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#------------------------------------------------------------------------------
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# VOID
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# EFIAPI
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# IoReadFifo32 (
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# IN UINTN Port, // rcx
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# IN UINTN Count, // rdx
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# IN VOID *Buffer // r8
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# );
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#------------------------------------------------------------------------------
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ASM_GLOBAL ASM_PFX(IoReadFifo32)
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ASM_PFX(IoReadFifo32):
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cld
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xchg %rcx, %rdx
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xchg %r8, %rdi # rdi: buffer address; r8: save register
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rep insl
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mov %r8, %rdi # restore rdi
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ret
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#------------------------------------------------------------------------------
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# VOID
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# EFIAPI
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# IoWriteFifo8 (
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# IN UINTN Port, // rcx
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# IN UINTN Count, // rdx
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# IN VOID *Buffer // r8
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# );
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#------------------------------------------------------------------------------
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ASM_GLOBAL ASM_PFX(IoWriteFifo8)
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ASM_PFX(IoWriteFifo8):
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cld
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xchg %rcx, %rdx
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xchg %r8, %rsi # rsi: buffer address; r8: save register
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rep outsb
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mov %r8, %rsi # restore rsi
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ret
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#------------------------------------------------------------------------------
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# VOID
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# EFIAPI
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# IoWriteFifo16 (
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# IN UINTN Port, // rcx
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# IN UINTN Count, // rdx
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# IN VOID *Buffer // r8
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# );
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#------------------------------------------------------------------------------
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ASM_GLOBAL ASM_PFX(IoWriteFifo16)
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ASM_PFX(IoWriteFifo16):
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cld
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xchg %rcx, %rdx
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xchg %r8, %rsi # rsi: buffer address; r8: save register
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rep outsw
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mov %r8, %rsi # restore rsi
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ret
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#------------------------------------------------------------------------------
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# VOID
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# EFIAPI
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# IoWriteFifo32 (
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# IN UINTN Port, // rcx
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# IN UINTN Count, // rdx
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# IN VOID *Buffer // r8
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# );
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#------------------------------------------------------------------------------
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ASM_GLOBAL ASM_PFX(IoWriteFifo32)
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ASM_PFX(IoWriteFifo32):
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cld
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xchg %rcx, %rdx
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xchg %r8, %rsi # rsi: buffer address; r8: save register
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rep outsl
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mov %r8, %rsi # restore rsi
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ret
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