5c7dd7acc3
repo: https://github.com/T-head-Semi/linux commit: b1313fe517ca3703119dcc99ef3bbf75ab42bcfb Change-Id: I6cbb35294024ea3a66140e311f4bb705fd7fd626
49 lines
902 B
ArmAsm
49 lines
902 B
ArmAsm
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Enter and leave sleep state on chips with 6xx-style HID0
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* power management bits, which don't leave sleep state via reset.
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*
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* Author: Scott Wood <scottwood@freescale.com>
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*
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* Copyright (c) 2006-2007 Freescale Semiconductor, Inc.
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*/
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#include <asm/ppc_asm.h>
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#include <asm/reg.h>
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#include <asm/thread_info.h>
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#include <asm/asm-offsets.h>
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_GLOBAL(mpc6xx_enter_standby)
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mflr r4
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mfspr r5, SPRN_HID0
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rlwinm r5, r5, 0, ~(HID0_DOZE | HID0_NAP)
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oris r5, r5, HID0_SLEEP@h
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mtspr SPRN_HID0, r5
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isync
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lis r5, ret_from_standby@h
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ori r5, r5, ret_from_standby@l
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mtlr r5
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lwz r6, TI_LOCAL_FLAGS(r2)
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ori r6, r6, _TLF_SLEEPING
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stw r6, TI_LOCAL_FLAGS(r2)
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mfmsr r5
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ori r5, r5, MSR_EE
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oris r5, r5, MSR_POW@h
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sync
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mtmsr r5
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isync
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1: b 1b
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ret_from_standby:
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mfspr r5, SPRN_HID0
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rlwinm r5, r5, 0, ~HID0_SLEEP
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mtspr SPRN_HID0, r5
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mtlr r4
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blr
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