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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 */