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
;
34 extern u32
*cpu_to_phys_id
;
36 extern void cpu_die(void);
37 extern int cpu_to_chip_id(int cpu
);
42 void (*message_pass
)(int cpu
, int msg
);
43 #ifdef CONFIG_PPC_SMP_MUXED_IPI
44 void (*cause_ipi
)(int cpu
);
46 int (*cause_nmi_ipi
)(int cpu
);
48 int (*kick_cpu
)(int nr
);
49 int (*prepare_cpu
)(int nr
);
50 void (*setup_cpu
)(int nr
);
51 void (*bringup_done
)(void);
52 void (*take_timebase
)(void);
53 void (*give_timebase
)(void);
54 int (*cpu_disable
)(void);
55 void (*cpu_die
)(unsigned int nr
);
56 int (*cpu_bootable
)(unsigned int nr
);
59 extern void smp_flush_nmi_ipi(u64 delay_us
);
60 extern int smp_send_nmi_ipi(int cpu
, void (*fn
)(struct pt_regs
*), u64 delay_us
);
61 extern int smp_send_safe_nmi_ipi(int cpu
, void (*fn
)(struct pt_regs
*), u64 delay_us
);
62 extern void smp_send_debugger_break(void);
63 extern void start_secondary_resume(void);
64 extern void smp_generic_give_timebase(void);
65 extern void smp_generic_take_timebase(void);
67 DECLARE_PER_CPU(unsigned int, cpu_pvr
);
69 #ifdef CONFIG_HOTPLUG_CPU
70 int generic_cpu_disable(void);
71 void generic_cpu_die(unsigned int cpu
);
72 void generic_set_cpu_dead(unsigned int cpu
);
73 void generic_set_cpu_up(unsigned int cpu
);
74 int generic_check_cpu_restart(unsigned int cpu
);
75 int is_cpu_dead(unsigned int cpu
);
77 #define generic_set_cpu_up(i) do { } while (0)
81 #define raw_smp_processor_id() (local_paca->paca_index)
82 #define hard_smp_processor_id() (get_paca()->hw_cpu_id)
85 extern int smp_hw_index
[];
87 #define raw_smp_processor_id() (current_thread_info()->cpu)
88 #define hard_smp_processor_id() (smp_hw_index[smp_processor_id()])
90 static inline int get_hard_smp_processor_id(int cpu
)
92 return smp_hw_index
[cpu
];
95 static inline void set_hard_smp_processor_id(int cpu
, int phys
)
97 smp_hw_index
[cpu
] = phys
;
101 DECLARE_PER_CPU(cpumask_var_t
, cpu_sibling_map
);
102 DECLARE_PER_CPU(cpumask_var_t
, cpu_l2_cache_map
);
103 DECLARE_PER_CPU(cpumask_var_t
, cpu_core_map
);
105 static inline struct cpumask
*cpu_sibling_mask(int cpu
)
107 return per_cpu(cpu_sibling_map
, cpu
);
110 static inline struct cpumask
*cpu_core_mask(int cpu
)
112 return per_cpu(cpu_core_map
, cpu
);
115 static inline struct cpumask
*cpu_l2_cache_mask(int cpu
)
117 return per_cpu(cpu_l2_cache_map
, cpu
);
120 extern int cpu_to_core_id(int cpu
);
122 /* Since OpenPIC has only 4 IPIs, we use slightly different message numbers.
124 * Make sure this matches openpic_request_IPIs in open_pic.c, or what shows up
125 * in /proc/interrupts will be wrong!!! --Troy */
126 #define PPC_MSG_CALL_FUNCTION 0
127 #define PPC_MSG_RESCHEDULE 1
128 #define PPC_MSG_TICK_BROADCAST 2
129 #define PPC_MSG_NMI_IPI 3
131 /* This is only used by the powernv kernel */
132 #define PPC_MSG_RM_HOST_ACTION 4
134 #define NMI_IPI_ALL_OTHERS -2
136 #ifdef CONFIG_NMI_IPI
137 extern int smp_handle_nmi_ipi(struct pt_regs
*regs
);
139 static inline int smp_handle_nmi_ipi(struct pt_regs
*regs
) { return 0; }
142 /* for irq controllers that have dedicated ipis per message (4) */
143 extern int smp_request_message_ipi(int virq
, int message
);
144 extern const char *smp_ipi_name
[];
146 /* for irq controllers with only a single ipi */
147 extern void smp_muxed_ipi_message_pass(int cpu
, int msg
);
148 extern void smp_muxed_ipi_set_message(int cpu
, int msg
);
149 extern irqreturn_t
smp_ipi_demux(void);
150 extern irqreturn_t
smp_ipi_demux_relaxed(void);
152 void smp_init_pSeries(void);
153 void smp_init_cell(void);
154 void smp_setup_cpu_maps(void);
156 extern int __cpu_disable(void);
157 extern void __cpu_die(unsigned int cpu
);
161 #define hard_smp_processor_id() get_hard_smp_processor_id(0)
162 #define smp_setup_cpu_maps()
163 static inline void inhibit_secondary_onlining(void) {}
164 static inline void uninhibit_secondary_onlining(void) {}
165 static inline const struct cpumask
*cpu_sibling_mask(int cpu
)
167 return cpumask_of(cpu
);
170 #endif /* CONFIG_SMP */
173 static inline int get_hard_smp_processor_id(int cpu
)
175 return paca_ptrs
[cpu
]->hw_cpu_id
;
178 static inline void set_hard_smp_processor_id(int cpu
, int phys
)
180 paca_ptrs
[cpu
]->hw_cpu_id
= phys
;
185 extern int boot_cpuid_phys
;
186 static inline int get_hard_smp_processor_id(int cpu
)
188 return boot_cpuid_phys
;
191 static inline void set_hard_smp_processor_id(int cpu
, int phys
)
193 boot_cpuid_phys
= phys
;
195 #endif /* !CONFIG_SMP */
196 #endif /* !CONFIG_PPC64 */
198 #if defined(CONFIG_PPC64) && (defined(CONFIG_SMP) || defined(CONFIG_KEXEC_CORE))
199 extern void smp_release_cpus(void);
201 static inline void smp_release_cpus(void) { };
204 extern int smt_enabled_at_boot
;
206 extern void smp_mpic_probe(void);
207 extern void smp_mpic_setup_cpu(int cpu
);
208 extern int smp_generic_kick_cpu(int nr
);
209 extern int smp_generic_cpu_bootable(unsigned int nr
);
212 extern void smp_generic_give_timebase(void);
213 extern void smp_generic_take_timebase(void);
215 extern struct smp_ops_t
*smp_ops
;
217 extern void arch_send_call_function_single_ipi(int cpu
);
218 extern void arch_send_call_function_ipi_mask(const struct cpumask
*mask
);
220 /* Definitions relative to the secondary CPU spin loop
221 * and entry point. Not all of them exist on both 32 and
222 * 64-bit but defining them all here doesn't harm
224 extern void generic_secondary_smp_init(void);
225 extern void generic_secondary_thread_init(void);
226 extern unsigned long __secondary_hold_spinloop
;
227 extern unsigned long __secondary_hold_acknowledge
;
228 extern char __secondary_hold
;
229 extern unsigned int booting_thread_hwid
;
231 extern void __early_start(void);
232 #endif /* __ASSEMBLY__ */
234 #endif /* __KERNEL__ */
235 #endif /* _ASM_POWERPC_SMP_H) */