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);
40 DECLARE_PER_CPU(unsigned int, cpu_pvr);
42 #ifdef CONFIG_HOTPLUG_CPU
43 extern void fixup_irqs(const struct cpumask *map);
44 int generic_cpu_disable(void);
45 int generic_cpu_enable(unsigned int cpu);
46 void generic_cpu_die(unsigned int cpu);
47 void generic_mach_cpu_die(void);
51 #define raw_smp_processor_id() (local_paca->paca_index)
52 #define hard_smp_processor_id() (get_paca()->hw_cpu_id)
55 extern int smp_hw_index[];
57 #define raw_smp_processor_id() (current_thread_info()->cpu)
58 #define hard_smp_processor_id() (smp_hw_index[smp_processor_id()])
60 static inline int get_hard_smp_processor_id(int cpu)
62 return smp_hw_index[cpu];
65 static inline void set_hard_smp_processor_id(int cpu, int phys)
67 smp_hw_index[cpu] = phys;
71 DECLARE_PER_CPU(cpumask_t, cpu_sibling_map);
72 DECLARE_PER_CPU(cpumask_t, cpu_core_map);
73 extern int cpu_to_core_id(int cpu);
75 /* Since OpenPIC has only 4 IPIs, we use slightly different message numbers.
77 * Make sure this matches openpic_request_IPIs in open_pic.c, or what shows up
78 * in /proc/interrupts will be wrong!!! --Troy */
79 #define PPC_MSG_CALL_FUNCTION 0
80 #define PPC_MSG_RESCHEDULE 1
81 #define PPC_MSG_CALL_FUNC_SINGLE 2
82 #define PPC_MSG_DEBUGGER_BREAK 3
85 * irq controllers that have dedicated ipis per message and don't
86 * need additional code in the action handler may use this
88 extern int smp_request_message_ipi(int virq, int message);
89 extern const char *smp_ipi_name[];
91 void smp_init_iSeries(void);
92 void smp_init_pSeries(void);
93 void smp_init_cell(void);
94 void smp_init_celleb(void);
95 void smp_setup_cpu_maps(void);
96 void smp_setup_cpu_sibling_map(void);
98 extern int __cpu_disable(void);
99 extern void __cpu_die(unsigned int cpu);
103 #define hard_smp_processor_id() get_hard_smp_processor_id(0)
104 #define smp_setup_cpu_maps()
106 #endif /* CONFIG_SMP */
109 static inline int get_hard_smp_processor_id(int cpu)
111 return paca[cpu].hw_cpu_id;
114 static inline void set_hard_smp_processor_id(int cpu, int phys)
116 paca[cpu].hw_cpu_id = phys;
119 extern void smp_release_cpus(void);
124 extern int boot_cpuid_phys;
125 static inline int get_hard_smp_processor_id(int cpu)
127 return boot_cpuid_phys;
130 static inline void set_hard_smp_processor_id(int cpu, int phys)
132 boot_cpuid_phys = phys;
134 #endif /* !CONFIG_SMP */
135 #endif /* !CONFIG_PPC64 */
137 extern int smt_enabled_at_boot;
139 extern int smp_mpic_probe(void);
140 extern void smp_mpic_setup_cpu(int cpu);
141 extern void smp_generic_kick_cpu(int nr);
143 extern void smp_generic_give_timebase(void);
144 extern void smp_generic_take_timebase(void);
146 extern struct smp_ops_t *smp_ops;
148 extern void arch_send_call_function_single_ipi(int cpu);
149 extern void arch_send_call_function_ipi_mask(const struct cpumask *mask);
151 /* Definitions relative to the secondary CPU spin loop
152 * and entry point. Not all of them exist on both 32 and
153 * 64-bit but defining them all here doesn't harm
155 extern void generic_secondary_smp_init(void);
156 extern void generic_secondary_thread_init(void);
157 extern unsigned long __secondary_hold_spinloop;
158 extern unsigned long __secondary_hold_acknowledge;
159 extern char __secondary_hold;
161 #endif /* __ASSEMBLY__ */
163 #endif /* __KERNEL__ */
164 #endif /* _ASM_POWERPC_SMP_H) */