47 lines
1.2 KiB
C
47 lines
1.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (C) 1999 Cort Dougan <cort@cs.nmt.edu>
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*/
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#ifndef _ASM_POWERPC_RUNLATCH_H
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#define _ASM_POWERPC_RUNLATCH_H
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#ifdef CONFIG_PPC64
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extern void __ppc64_runlatch_on(void);
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extern void __ppc64_runlatch_off(void);
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/*
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* We manually hard enable-disable, this is called
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* in the idle loop and we don't want to mess up
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* with soft-disable/enable & interrupt replay.
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*/
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#define ppc64_runlatch_off() \
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do { \
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if (cpu_has_feature(CPU_FTR_CTRL) && \
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test_thread_local_flags(_TLF_RUNLATCH)) { \
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unsigned long msr = mfmsr(); \
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__hard_irq_disable(); \
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__ppc64_runlatch_off(); \
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if (msr & MSR_EE) \
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__hard_irq_enable(); \
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} \
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} while (0)
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#define ppc64_runlatch_on() \
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do { \
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if (cpu_has_feature(CPU_FTR_CTRL) && \
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!test_thread_local_flags(_TLF_RUNLATCH)) { \
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unsigned long msr = mfmsr(); \
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__hard_irq_disable(); \
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__ppc64_runlatch_on(); \
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if (msr & MSR_EE) \
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__hard_irq_enable(); \
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} \
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} while (0)
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#else
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#define ppc64_runlatch_on()
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#define ppc64_runlatch_off()
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#endif /* CONFIG_PPC64 */
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#endif /* _ASM_POWERPC_RUNLATCH_H */
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