arch/powerpc/include/asm/runlatch.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Copyright (C) 1999 Cort Dougan <cort@cs.nmt.edu>
   4  */
   5 #ifndef _ASM_POWERPC_RUNLATCH_H
   6 #define _ASM_POWERPC_RUNLATCH_H
   7
   8 #ifdef CONFIG_PPC64
   9
  10 extern void __ppc64_runlatch_on(void);
  11 extern void __ppc64_runlatch_off(void);
  12
  13 /*
  14  * We manually hard enable-disable, this is called
  15  * in the idle loop and we don't want to mess up
  16  * with soft-disable/enable & interrupt replay.
  17  */
  18 #define ppc64_runlatch_off()                                    \
  19         do {                                                    \
  20                 if (cpu_has_feature(CPU_FTR_CTRL) &&            \
  21                     test_thread_local_flags(_TLF_RUNLATCH)) {   \
  22                         __hard_irq_disable();                   \
  23                         __ppc64_runlatch_off();                 \
  24                         if (!(local_paca->irq_happened & PACA_IRQ_HARD_DIS)) \
  25                                 __hard_irq_enable();            \
  26                 }                                               \
  27         } while (0)
  28
  29 #define ppc64_runlatch_on()                                     \
  30         do {                                                    \
  31                 if (cpu_has_feature(CPU_FTR_CTRL) &&            \
  32                     !test_thread_local_flags(_TLF_RUNLATCH)) {  \
  33                         __hard_irq_disable();                   \
  34                         __ppc64_runlatch_on();                  \
  35                         if (!(local_paca->irq_happened & PACA_IRQ_HARD_DIS)) \
  36                                 __hard_irq_enable();            \
  37                 }                                               \
  38         } while (0)
  39 #else
  40 #define ppc64_runlatch_on()
  41 #define ppc64_runlatch_off()
  42 #endif /* CONFIG_PPC64 */
  43
  44 #endif /* _ASM_POWERPC_RUNLATCH_H */