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Filename/usr/src/linux-headers-3.13.0-24/arch/powerpc/include/asm/runlatch.h
Size1.12 kb
Permissionrw-r--r--
Ownerroot : root
Create time27-Apr-2025 09:50
Last modified20-Jan-2014 10:40
Last accessed06-Jul-2025 19:54
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/*
* Copyright (C) 1999 Cort Dougan <[email protected]>
*/
#ifndef _ASM_POWERPC_RUNLATCH_H
#define _ASM_POWERPC_RUNLATCH_H

#ifdef CONFIG_PPC64

extern void __ppc64_runlatch_on(void);
extern void __ppc64_runlatch_off(void);

/*
* We manually hard enable-disable, this is called
* in the idle loop and we don't want to mess up
* with soft-disable/enable & interrupt replay.
*/
#define ppc64_runlatch_off() \
do { \
if (cpu_has_feature(CPU_FTR_CTRL) && \
test_thread_local_flags(_TLF_RUNLATCH)) { \
unsigned long msr = mfmsr(); \
__hard_irq_disable(); \
__ppc64_runlatch_off(); \
if (msr & MSR_EE) \
__hard_irq_enable(); \
} \
} while (0)

#define ppc64_runlatch_on() \
do { \
if (cpu_has_feature(CPU_FTR_CTRL) && \
!test_thread_local_flags(_TLF_RUNLATCH)) { \
unsigned long msr = mfmsr(); \
__hard_irq_disable(); \
__ppc64_runlatch_on(); \
if (msr & MSR_EE) \
__hard_irq_enable(); \
} \
} while (0)
#else
#define ppc64_runlatch_on()
#define ppc64_runlatch_off()
#endif /* CONFIG_PPC64 */

#endif /* _ASM_POWERPC_RUNLATCH_H */