[mirror_edk2.git] / MdePkg / Library / BaseLib / AArch64 / SpeculationBarrier.asm

;------------------------------------------------------------------------------\r
;\r
; SpeculationBarrier() for AArch64\r
;\r
; Copyright (c) 2019, Linaro Ltd. All rights reserved.\r
;\r
; SPDX-License-Identifier: BSD-2-Clause-Patent\r
;\r
;------------------------------------------------------------------------------\r
\r
  EXPORT SpeculationBarrier\r
  AREA BaseLib_LowLevel, CODE, READONLY\r
\r
;/**\r
;  Uses as a barrier to stop speculative execution.\r
;\r
;  Ensures that no later instruction will execute speculatively, until all prior\r
;  instructions have completed.\r
;\r
;**/\r
;VOID\r
;EFIAPI\r
;SpeculationBarrier (\r
;  VOID\r
;  );\r
;\r
SpeculationBarrier\r
    dsb   sy\r
    isb\r
    ret\r
\r
  END\r
Commit	Line	Data
c0959b44 AB	1	;------------------------------------------------------------------------------\r
	2	;\r
	3	; SpeculationBarrier() for AArch64\r
	4	;\r
	5	; Copyright (c) 2019, Linaro Ltd. All rights reserved.\r
	6	;\r
9344f092	7	; SPDX-License-Identifier: BSD-2-Clause-Patent\r
c0959b44 AB	8	;\r
	9	;------------------------------------------------------------------------------\r
	10	\r
	11	EXPORT SpeculationBarrier\r
	12	AREA BaseLib_LowLevel, CODE, READONLY\r
	13	\r
	14	;/**\r
	15	; Uses as a barrier to stop speculative execution.\r
	16	;\r
	17	; Ensures that no later instruction will execute speculatively, until all prior\r
	18	; instructions have completed.\r
	19	;\r
	20	;**/\r
	21	;VOID\r
	22	;EFIAPI\r
	23	;SpeculationBarrier (\r
	24	; VOID\r
	25	; );\r
	26	;\r
	27	SpeculationBarrier\r
	28	dsb sy\r
	29	isb\r
	30	ret\r
	31	\r
	32	END\r