/* SPDX-License-Identifier: GPL-2.0 */
|
/*
|
* Copyright (C) 1999 Cort Dougan <cort@cs.nmt.edu>
|
*/
|
#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 */
|
