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