2 * arch/arm/include/asm/smp.h
4 * Copyright (C) 2004-2005 ARM Ltd.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
10 #ifndef __ASM_ARM_SMP_H
11 #define __ASM_ARM_SMP_H
13 #include <linux/threads.h>
14 #include <linux/cpumask.h>
15 #include <linux/thread_info.h>
18 # error "<asm/smp.h> included in non-SMP build"
21 #define raw_smp_processor_id() (current_thread_info()->cpu)
26 * generate IPI list text
28 extern void show_ipi_list(struct seq_file
*, int);
31 * Called from assembly code, this handles an IPI.
33 asmlinkage
void do_IPI(int ipinr
, struct pt_regs
*regs
);
36 * Called from C code, this handles an IPI.
38 void handle_IPI(int ipinr
, struct pt_regs
*regs
);
41 * Setup the set of possible CPUs (via set_cpu_possible)
43 extern void smp_init_cpus(void);
47 * Provide a function to raise an IPI cross call on CPUs in callmap.
49 extern void set_smp_cross_call(void (*)(const struct cpumask
*, unsigned int));
52 * Boot a secondary CPU, and assign it the specified idle task.
53 * This also gives us the initial stack to use for this CPU.
55 extern int boot_secondary(unsigned int cpu
, struct task_struct
*);
58 * Called from platform specific assembly code, this is the
59 * secondary CPU entry point.
61 asmlinkage
void secondary_start_kernel(void);
65 * Initial data for bringing up a secondary CPU.
67 struct secondary_data
{
69 unsigned long swapper_pg_dir
;
72 extern struct secondary_data secondary_data
;
73 extern volatile int pen_release
;
75 extern int __cpu_disable(void);
77 extern void __cpu_die(unsigned int cpu
);
78 extern void cpu_die(void);
80 extern void arch_send_call_function_single_ipi(int cpu
);
81 extern void arch_send_call_function_ipi_mask(const struct cpumask
*mask
);
82 extern void arch_send_wakeup_ipi_mask(const struct cpumask
*mask
);
84 extern void smp_send_all_cpu_backtrace(void);
86 struct smp_operations
{
89 * Setup the set of possible CPUs (via set_cpu_possible)
91 void (*smp_init_cpus
)(void);
93 * Initialize cpu_possible map, and enable coherency
95 void (*smp_prepare_cpus
)(unsigned int max_cpus
);
98 * Perform platform specific initialisation of the specified CPU.
100 void (*smp_secondary_init
)(unsigned int cpu
);
102 * Boot a secondary CPU, and assign it the specified idle task.
103 * This also gives us the initial stack to use for this CPU.
105 int (*smp_boot_secondary
)(unsigned int cpu
, struct task_struct
*idle
);
106 #ifdef CONFIG_HOTPLUG_CPU
107 int (*cpu_kill
)(unsigned int cpu
);
108 void (*cpu_die
)(unsigned int cpu
);
109 int (*cpu_disable
)(unsigned int cpu
);
115 * set platform specific SMP operations
117 extern void smp_set_ops(struct smp_operations
*);
119 #endif /* ifndef __ASM_ARM_SMP_H */