| 1 | #------------------------------------------------------------------------------
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| 2 | #
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| 3 | # CpuSleep() for ARMv7
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| 4 | #
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| 5 | # ARMv6 versions was:
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| 6 | # MOV r0,#0
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| 7 | # MCR p15,0,r0,c7,c0,4 ;Wait for Interrupt instruction
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| 8 | #
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| 9 | # But this is a no-op on ARMv7
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| 10 | #
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| 11 | # Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
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| 12 | # Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
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| 13 | # SPDX-License-Identifier: BSD-2-Clause-Patent
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| 14 | #
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| 15 | #------------------------------------------------------------------------------
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| 16 |
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| 17 | .text
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| 18 | .p2align 2
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| 19 | GCC_ASM_EXPORT(CpuSleep)
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| 20 |
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| 21 | #/**
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| 22 | # Places the CPU in a sleep state until an interrupt is received.
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| 23 | #
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| 24 | # Places the CPU in a sleep state until an interrupt is received. If interrupts
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| 25 | # are disabled prior to calling this function, then the CPU will be placed in a
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| 26 | # sleep state indefinitely.
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| 27 | #
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| 28 | #**/
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| 29 | #VOID
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| 30 | #EFIAPI
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| 31 | #CpuSleep (
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| 32 | # VOID
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| 33 | # );
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| 34 | #
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| 35 | ASM_PFX(CpuSleep):
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| 36 | wfi
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| 37 | bx lr
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