projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| ae3a197e DH |
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 | unsigned long msr = mfmsr(); \ | |
| 23 | __hard_irq_disable(); \ | |
| 24 | __ppc64_runlatch_off(); \ | |
| 25 | if (msr & MSR_EE) \ | |
| 26 | __hard_irq_enable(); \ | |
| 27 | } \ | |
| 28 | } while (0) | |
| 29 | ||
| 30 | #define ppc64_runlatch_on() \ | |
| 31 | do { \ | |
| 32 | if (cpu_has_feature(CPU_FTR_CTRL) && \ | |
| 33 | !test_thread_local_flags(_TLF_RUNLATCH)) { \ | |
| 34 | unsigned long msr = mfmsr(); \ | |
| 35 | __hard_irq_disable(); \ | |
| 36 | __ppc64_runlatch_on(); \ | |
| 37 | if (msr & MSR_EE) \ | |
| 38 | __hard_irq_enable(); \ | |
| 39 | } \ | |
| 40 | } while (0) | |
| 41 | #else | |
| 42 | #define ppc64_runlatch_on() | |
| 43 | #define ppc64_runlatch_off() | |
| 44 | #endif /* CONFIG_PPC64 */ | |
| 45 | ||
| 46 | #endif /* _ASM_POWERPC_RUNLATCH_H */ |