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>
29 #include <asm/percpu.h>
31 extern int boot_cpuid;
33 extern void cpu_die(void);
37 extern void smp_send_debugger_break(int cpu);
38 extern void smp_message_recv(int);
39 extern void start_secondary_resume(void);
41 DECLARE_PER_CPU(unsigned int, cpu_pvr);
43 #ifdef CONFIG_HOTPLUG_CPU
44 extern void migrate_irqs(void);
45 int generic_cpu_disable(void);
46 void generic_cpu_die(unsigned int cpu);
47 void generic_mach_cpu_die(void);
48 DECLARE_PER_CPU(int, cpu_state);
52 #define raw_smp_processor_id() (local_paca->paca_index)
53 #define hard_smp_processor_id() (get_paca()->hw_cpu_id)
56 extern int smp_hw_index[];
58 #define raw_smp_processor_id() (current_thread_info()->cpu)
59 #define hard_smp_processor_id() (smp_hw_index[smp_processor_id()])
61 static inline int get_hard_smp_processor_id(int cpu)
63 return smp_hw_index[cpu];
66 static inline void set_hard_smp_processor_id(int cpu, int phys)
68 smp_hw_index[cpu] = phys;
72 DECLARE_PER_CPU(cpumask_var_t, cpu_sibling_map);
73 DECLARE_PER_CPU(cpumask_var_t, cpu_core_map);
75 static inline struct cpumask *cpu_sibling_mask(int cpu)
77 return per_cpu(cpu_sibling_map, cpu);
80 static inline struct cpumask *cpu_core_mask(int cpu)
82 return per_cpu(cpu_core_map, cpu);
85 extern int cpu_to_core_id(int cpu);
87 /* Since OpenPIC has only 4 IPIs, we use slightly different message numbers.
89 * Make sure this matches openpic_request_IPIs in open_pic.c, or what shows up
90 * in /proc/interrupts will be wrong!!! --Troy */
91 #define PPC_MSG_CALL_FUNCTION 0
92 #define PPC_MSG_RESCHEDULE 1
93 #define PPC_MSG_CALL_FUNC_SINGLE 2
94 #define PPC_MSG_DEBUGGER_BREAK 3
97 * irq controllers that have dedicated ipis per message and don't
98 * need additional code in the action handler may use this
100 extern int smp_request_message_ipi(int virq, int message);
101 extern const char *smp_ipi_name[];
103 void smp_init_iSeries(void);
104 void smp_init_pSeries(void);
105 void smp_init_cell(void);
106 void smp_init_celleb(void);
107 void smp_setup_cpu_maps(void);
109 extern int __cpu_disable(void);
110 extern void __cpu_die(unsigned int cpu);
114 #define hard_smp_processor_id() get_hard_smp_processor_id(0)
115 #define smp_setup_cpu_maps()
117 #endif /* CONFIG_SMP */
120 static inline int get_hard_smp_processor_id(int cpu)
122 return paca[cpu].hw_cpu_id;
125 static inline void set_hard_smp_processor_id(int cpu, int phys)
127 paca[cpu].hw_cpu_id = phys;
130 extern void smp_release_cpus(void);
135 extern int boot_cpuid_phys;
136 static inline int get_hard_smp_processor_id(int cpu)
138 return boot_cpuid_phys;
141 static inline void set_hard_smp_processor_id(int cpu, int phys)
143 boot_cpuid_phys = phys;
145 #endif /* !CONFIG_SMP */
146 #endif /* !CONFIG_PPC64 */
148 extern int smt_enabled_at_boot;
150 extern int smp_mpic_probe(void);
151 extern void smp_mpic_setup_cpu(int cpu);
152 extern void smp_generic_kick_cpu(int nr);
154 extern void smp_generic_give_timebase(void);
155 extern void smp_generic_take_timebase(void);
157 extern struct smp_ops_t *smp_ops;
159 extern void arch_send_call_function_single_ipi(int cpu);
160 extern void arch_send_call_function_ipi_mask(const struct cpumask *mask);
162 /* Definitions relative to the secondary CPU spin loop
163 * and entry point. Not all of them exist on both 32 and
164 * 64-bit but defining them all here doesn't harm
166 extern void generic_secondary_smp_init(void);
167 extern void generic_secondary_thread_init(void);
168 extern unsigned long __secondary_hold_spinloop;
169 extern unsigned long __secondary_hold_acknowledge;
170 extern char __secondary_hold;
172 #endif /* __ASSEMBLY__ */
174 #endif /* __KERNEL__ */
175 #endif /* _ASM_POWERPC_SMP_H) */