| 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 - 2011, 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 | EXPORT CpuSleep
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| 18 | AREA cpu_sleep, CODE, READONLY
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| 19 |
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| 20 | ;/**
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| 21 | ; Places the CPU in a sleep state until an interrupt is received.
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| 22 | ;
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| 23 | ; Places the CPU in a sleep state until an interrupt is received. If interrupts
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| 24 | ; are disabled prior to calling this function, then the CPU will be placed in a
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| 25 | ; sleep state indefinitely.
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| 26 | ;
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| 27 | ;**/
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| 28 | ;VOID
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| 29 | ;EFIAPI
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| 30 | ;CpuSleep (
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| 31 | ; VOID
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| 32 | ; );
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| 33 | ;
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| 34 | CpuSleep
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| 35 | WFI
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| 36 | BX LR
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| 37 |
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| 38 | END
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