1 /* SPDX-License-Identifier: GPL-2.0-only */
2 #ifndef _ASM_POWERPC_VDSO_PROCESSOR_H
3 #define _ASM_POWERPC_VDSO_PROCESSOR_H
4
5 #ifndef __ASSEMBLY__
6
7 /* Macros for adjusting thread priority (hardware multi-threading) */
8 #ifdef CONFIG_PPC64
9 #define HMT_very_low() asm volatile("or 31, 31, 31 # very low priority")
10 #define HMT_low() asm volatile("or 1, 1, 1 # low priority")
11 #define HMT_medium_low() asm volatile("or 6, 6, 6 # medium low priority")
12 #define HMT_medium() asm volatile("or 2, 2, 2 # medium priority")
13 #define HMT_medium_high() asm volatile("or 5, 5, 5 # medium high priority")
14 #define HMT_high() asm volatile("or 3, 3, 3 # high priority")
15 #else
16 #define HMT_very_low()
17 #define HMT_low()
18 #define HMT_medium_low()
19 #define HMT_medium()
20 #define HMT_medium_high()
21 #define HMT_high()
22 #endif
23
24 #ifdef CONFIG_PPC64
25 #define cpu_relax() \
26 asm volatile(ASM_FTR_IFCLR( \
27 /* Pre-POWER10 uses low ; medium priority nops */ \
28 "or 1,1,1 ; or 2,2,2", \
29 /* POWER10 onward uses pause_short (wait 2,0) */ \
30 PPC_WAIT(2, 0), \
31 %0) :: "i" (CPU_FTR_ARCH_31) : "memory")
32 #else
33 #define cpu_relax() barrier()
34 #endif
35
36 #endif /* __ASSEMBLY__ */
37
38 #endif /* _ASM_POWERPC_VDSO_PROCESSOR_H */
39
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