2 * smp.h: PowerPC-specific SMP code.
4 * Original was a copy of sparc smp.h. Now heavily modified
7 * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
8 * Copyright (C) 1996-2001 Cort Dougan <cort@fsmlabs.com>
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * as published by the Free Software Foundation; either version
13 * 2 of the License, or (at your option) any later version.
16 #ifndef _ASM_POWERPC_SMP_H
17 #define _ASM_POWERPC_SMP_H
20 #include <linux/threads.h>
21 #include <linux/cpumask.h>
22 #include <linux/kernel.h>
23 #include <linux/irqreturn.h>
30 #include <asm/percpu.h>
32 extern int boot_cpuid;
33 extern int spinning_secondaries;
35 extern void cpu_die(void);
36 extern int cpu_to_chip_id(int cpu);
41 void (*message_pass)(int cpu, int msg);
42 #ifdef CONFIG_PPC_SMP_MUXED_IPI
43 void (*cause_ipi)(int cpu);
46 int (*kick_cpu)(int nr);
47 int (*prepare_cpu)(int nr);
48 void (*setup_cpu)(int nr);
49 void (*bringup_done)(void);
50 void (*take_timebase)(void);
51 void (*give_timebase)(void);
52 int (*cpu_disable)(void);
53 void (*cpu_die)(unsigned int nr);
54 int (*cpu_bootable)(unsigned int nr);
57 extern void smp_send_debugger_break(void);
58 extern void start_secondary_resume(void);
59 extern void smp_generic_give_timebase(void);
60 extern void smp_generic_take_timebase(void);
62 DECLARE_PER_CPU(unsigned int, cpu_pvr);
64 #ifdef CONFIG_HOTPLUG_CPU
65 int generic_cpu_disable(void);
66 void generic_cpu_die(unsigned int cpu);
67 void generic_set_cpu_dead(unsigned int cpu);
68 void generic_set_cpu_up(unsigned int cpu);
69 int generic_check_cpu_restart(unsigned int cpu);
70 int is_cpu_dead(unsigned int cpu);
72 #define generic_set_cpu_up(i) do { } while (0)
76 #define raw_smp_processor_id() (local_paca->paca_index)
77 #define hard_smp_processor_id() (get_paca()->hw_cpu_id)
80 extern int smp_hw_index[];
82 #define raw_smp_processor_id() (current_thread_info()->cpu)
83 #define hard_smp_processor_id() (smp_hw_index[smp_processor_id()])
85 static inline int get_hard_smp_processor_id(int cpu)
87 return smp_hw_index[cpu];
90 static inline void set_hard_smp_processor_id(int cpu, int phys)
92 smp_hw_index[cpu] = phys;
96 DECLARE_PER_CPU(cpumask_var_t, cpu_sibling_map);
97 DECLARE_PER_CPU(cpumask_var_t, cpu_core_map);
99 static inline struct cpumask *cpu_sibling_mask(int cpu)
101 return per_cpu(cpu_sibling_map, cpu);
104 static inline struct cpumask *cpu_core_mask(int cpu)
106 return per_cpu(cpu_core_map, cpu);
109 extern int cpu_to_core_id(int cpu);
111 /* Since OpenPIC has only 4 IPIs, we use slightly different message numbers.
113 * Make sure this matches openpic_request_IPIs in open_pic.c, or what shows up
114 * in /proc/interrupts will be wrong!!! --Troy */
115 #define PPC_MSG_CALL_FUNCTION 0
116 #define PPC_MSG_RESCHEDULE 1
117 #define PPC_MSG_TICK_BROADCAST 2
118 #define PPC_MSG_NMI_IPI 3
120 /* This is only used by the powernv kernel */
121 #define PPC_MSG_RM_HOST_ACTION 4
123 #define NMI_IPI_ALL_OTHERS -2
125 #ifdef CONFIG_NMI_IPI
126 extern int smp_handle_nmi_ipi(struct pt_regs *regs);
128 static inline int smp_handle_nmi_ipi(struct pt_regs *regs) { return 0; }
131 /* for irq controllers that have dedicated ipis per message (4) */
132 extern int smp_request_message_ipi(int virq, int message);
133 extern const char *smp_ipi_name[];
135 /* for irq controllers with only a single ipi */
136 extern void smp_muxed_ipi_message_pass(int cpu, int msg);
137 extern void smp_muxed_ipi_set_message(int cpu, int msg);
138 extern irqreturn_t smp_ipi_demux(void);
139 extern irqreturn_t smp_ipi_demux_relaxed(void);
141 void smp_init_pSeries(void);
142 void smp_init_cell(void);
143 void smp_setup_cpu_maps(void);
145 extern int __cpu_disable(void);
146 extern void __cpu_die(unsigned int cpu);
150 #define hard_smp_processor_id() get_hard_smp_processor_id(0)
151 #define smp_setup_cpu_maps()
152 static inline void inhibit_secondary_onlining(void) {}
153 static inline void uninhibit_secondary_onlining(void) {}
154 static inline const struct cpumask *cpu_sibling_mask(int cpu)
156 return cpumask_of(cpu);
159 #endif /* CONFIG_SMP */
162 static inline int get_hard_smp_processor_id(int cpu)
164 return paca[cpu].hw_cpu_id;
167 static inline void set_hard_smp_processor_id(int cpu, int phys)
169 paca[cpu].hw_cpu_id = phys;
174 extern int boot_cpuid_phys;
175 static inline int get_hard_smp_processor_id(int cpu)
177 return boot_cpuid_phys;
180 static inline void set_hard_smp_processor_id(int cpu, int phys)
182 boot_cpuid_phys = phys;
184 #endif /* !CONFIG_SMP */
185 #endif /* !CONFIG_PPC64 */
187 #if defined(CONFIG_PPC64) && (defined(CONFIG_SMP) || defined(CONFIG_KEXEC_CORE))
188 extern void smp_release_cpus(void);
190 static inline void smp_release_cpus(void) { };
193 extern int smt_enabled_at_boot;
195 extern void smp_mpic_probe(void);
196 extern void smp_mpic_setup_cpu(int cpu);
197 extern int smp_generic_kick_cpu(int nr);
198 extern int smp_generic_cpu_bootable(unsigned int nr);
201 extern void smp_generic_give_timebase(void);
202 extern void smp_generic_take_timebase(void);
204 extern struct smp_ops_t *smp_ops;
206 extern void arch_send_call_function_single_ipi(int cpu);
207 extern void arch_send_call_function_ipi_mask(const struct cpumask *mask);
209 /* Definitions relative to the secondary CPU spin loop
210 * and entry point. Not all of them exist on both 32 and
211 * 64-bit but defining them all here doesn't harm
213 extern void generic_secondary_smp_init(void);
214 extern void generic_secondary_thread_init(void);
215 extern unsigned long __secondary_hold_spinloop;
216 extern unsigned long __secondary_hold_acknowledge;
217 extern char __secondary_hold;
218 extern unsigned int booting_thread_hwid;
220 extern void __early_start(void);
221 #endif /* __ASSEMBLY__ */
223 #endif /* __KERNEL__ */
224 #endif /* _ASM_POWERPC_SMP_H) */