1 /* SPDX-License-Identifier: GPL-2.0-or-later */
3  * smp.h: PowerPC-specific SMP code.
9  * Copyright (C) 1996-2001 Cort Dougan <cort@fsmlabs.com>
33 extern int cpu_to_chip_id(int cpu);
38 	void  (*message_pass)(int cpu, int msg);
40 	void  (*cause_ipi)(int cpu);
42 	int   (*cause_nmi_ipi)(int cpu);
44 	int   (*kick_cpu)(int nr);
45 	int   (*prepare_cpu)(int nr);
46 	void  (*setup_cpu)(int nr);
51 	void  (*cpu_die)(unsigned int nr);
52 	int   (*cpu_bootable)(unsigned int nr);
58 extern int smp_send_nmi_ipi(int cpu, void (*fn)(struct pt_regs *), u64 delay_us);
59 extern int smp_send_safe_nmi_ipi(int cpu, void (*fn)(struct pt_regs *), u64 delay_us);
69 void generic_cpu_die(unsigned int cpu);
70 void generic_set_cpu_dead(unsigned int cpu);
71 void generic_set_cpu_up(unsigned int cpu);
72 int generic_check_cpu_restart(unsigned int cpu);
73 int is_cpu_dead(unsigned int cpu);
79 #define raw_smp_processor_id()	(local_paca->paca_index)
80 #define hard_smp_processor_id() (get_paca()->hw_cpu_id)
82 /* 32-bit */
87  * of task_struct here, but we need access to the CPU this task is running on.
89  * asm-offsets.h by kbuild to get the current processor ID.
91  * This also needs to be safeguarded when building asm-offsets.s because at
94  * when building something else than asm-offsets.s
103 static inline int get_hard_smp_processor_id(int cpu)  in get_hard_smp_processor_id()  argument
105 	return smp_hw_index[cpu];  in get_hard_smp_processor_id()
108 static inline void set_hard_smp_processor_id(int cpu, int phys)  in set_hard_smp_processor_id()  argument
110 	smp_hw_index[cpu] = phys;  in set_hard_smp_processor_id()
119 static inline struct cpumask *cpu_sibling_mask(int cpu)  in cpu_sibling_mask()  argument
121 	return per_cpu(cpu_sibling_map, cpu);  in cpu_sibling_mask()
124 static inline struct cpumask *cpu_l2_cache_mask(int cpu)  in cpu_l2_cache_mask()  argument
126 	return per_cpu(cpu_l2_cache_map, cpu);  in cpu_l2_cache_mask()
129 static inline struct cpumask *cpu_smallcore_mask(int cpu)  in cpu_smallcore_mask()  argument
131 	return per_cpu(cpu_smallcore_map, cpu);  in cpu_smallcore_mask()
134 extern int cpu_to_core_id(int cpu);
140 static inline const struct cpumask *cpu_smt_mask(int cpu)  in cpu_smt_mask()  argument
143 		return per_cpu(cpu_smallcore_map, cpu);  in cpu_smt_mask()
145 	return per_cpu(cpu_sibling_map, cpu);  in cpu_smt_mask()
152  * in /proc/interrupts will be wrong!!! --Troy */
161 #define NMI_IPI_ALL_OTHERS		-2
174 extern void smp_muxed_ipi_message_pass(int cpu, int msg);
175 extern void smp_muxed_ipi_set_message(int cpu, int msg);
184 extern void __cpu_die(unsigned int cpu);
192 static inline const struct cpumask *cpu_sibling_mask(int cpu)  in cpu_sibling_mask()  argument
194 	return cpumask_of(cpu);  in cpu_sibling_mask()
197 static inline const struct cpumask *cpu_smallcore_mask(int cpu)  in cpu_smallcore_mask()  argument
199 	return cpumask_of(cpu);  in cpu_smallcore_mask()
205 static inline int get_hard_smp_processor_id(int cpu)  in get_hard_smp_processor_id()  argument
207 	return paca_ptrs[cpu]->hw_cpu_id;  in get_hard_smp_processor_id()
210 static inline void set_hard_smp_processor_id(int cpu, int phys)  in set_hard_smp_processor_id()  argument
212 	paca_ptrs[cpu]->hw_cpu_id = phys;  in set_hard_smp_processor_id()
215 /* 32-bit */
218 static inline int get_hard_smp_processor_id(int cpu)  in get_hard_smp_processor_id()  argument
223 static inline void set_hard_smp_processor_id(int cpu, int phys)  in set_hard_smp_processor_id()  argument
239 extern void smp_mpic_setup_cpu(int cpu);
240 extern int smp_generic_kick_cpu(int nr);
241 extern int smp_generic_cpu_bootable(unsigned int nr);
249 extern void arch_send_call_function_single_ipi(int cpu);
252 /* Definitions relative to the secondary CPU spin loop
254  * 64-bit but defining them all here doesn't harm