Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
59 lines
1.2 KiB
ArmAsm
59 lines
1.2 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* Copyright (C) 2012 Freescale Semiconductor, Inc.
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*/
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#include <linux/export.h>
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#include <linux/threads.h>
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#include <asm/epapr_hcalls.h>
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#include <asm/reg.h>
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#include <asm/page.h>
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#include <asm/cputable.h>
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#include <asm/thread_info.h>
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#include <asm/ppc_asm.h>
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#include <asm/asm-compat.h>
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#include <asm/asm-offsets.h>
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#ifndef CONFIG_PPC64
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/* epapr_ev_idle() was derived from e500_idle() */
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_GLOBAL(epapr_ev_idle)
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PPC_LL r4, TI_LOCAL_FLAGS(r2) /* set napping bit */
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ori r4, r4,_TLF_NAPPING /* so when we take an exception */
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PPC_STL r4, TI_LOCAL_FLAGS(r2) /* it will return to our caller */
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#ifdef CONFIG_BOOKE
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wrteei 1
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#else
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mfmsr r4
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ori r4, r4, MSR_EE
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mtmsr r4
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#endif
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idle_loop:
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LOAD_REG_IMMEDIATE(r11, EV_HCALL_TOKEN(EV_IDLE))
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.global epapr_ev_idle_start
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epapr_ev_idle_start:
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li r3, -1
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nop
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nop
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nop
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/*
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* Guard against spurious wakeups from a hypervisor --
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* only interrupt will cause us to return to LR due to
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* _TLF_NAPPING.
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*/
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b idle_loop
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#endif
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/* Hypercall entry point. Will be patched with device tree instructions. */
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.global epapr_hypercall_start
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epapr_hypercall_start:
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li r3, -1
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nop
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nop
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nop
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blr
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EXPORT_SYMBOL(epapr_hypercall_start)
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