runlatch.h

Go to the documentation of this file.

/*
 * 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 */