1/*
2 * Copyright (C) 2012 ARM Ltd.
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
11 * GNU General Public License for more details.
12 *
13 * You should have received a copy of the GNU General Public License
14 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
15 */
16#ifndef __ASM_SMP_H
17#define __ASM_SMP_H
18
19#include <linux/threads.h>
20#include <linux/cpumask.h>
21#include <linux/thread_info.h>
22
23#define raw_smp_processor_id() (current_thread_info()->cpu)
24
25struct seq_file;
26
27/*
28 * generate IPI list text
29 */
30extern void show_ipi_list(struct seq_file *p, int prec);
31
32/*
33 * Called from C code, this handles an IPI.
34 */
35extern void handle_IPI(int ipinr, struct pt_regs *regs);
36
37/*
38 * Discover the set of possible CPUs and determine their
39 * SMP operations.
40 */
41extern void smp_init_cpus(void);
42
43/*
44 * Provide a function to raise an IPI cross call on CPUs in callmap.
45 */
46extern void set_smp_cross_call(void (*)(const struct cpumask *, unsigned int));
47
48extern void (*__smp_cross_call)(const struct cpumask *, unsigned int);
49
50/*
51 * Called from the secondary holding pen, this is the secondary CPU entry point.
52 */
53asmlinkage void secondary_start_kernel(void);
54
55/*
56 * Initial data for bringing up a secondary CPU.
57 */
58struct secondary_data {
59	void *stack;
60};
61extern struct secondary_data secondary_data;
62extern void secondary_entry(void);
63
64extern void arch_send_call_function_single_ipi(int cpu);
65extern void arch_send_call_function_ipi_mask(const struct cpumask *mask);
66
67extern int __cpu_disable(void);
68
69extern void __cpu_die(unsigned int cpu);
70extern void cpu_die(void);
71
72#endif /* ifndef __ASM_SMP_H */
73