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