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smp.h
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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 #ifndef CONFIG_SMP
24 # error "<asm/smp.h> included in non-SMP build"
25 #endif
26 
27 #define raw_smp_processor_id() (current_thread_info()->cpu)
28 
29 struct seq_file;
30 
31 /*
32  * generate IPI list text
33  */
34 extern void show_ipi_list(struct seq_file *p, int prec);
35 
36 /*
37  * Called from C code, this handles an IPI.
38  */
39 extern void handle_IPI(int ipinr, struct pt_regs *regs);
40 
41 /*
42  * Setup the set of possible CPUs (via set_cpu_possible)
43  */
44 extern void smp_init_cpus(void);
45 
46 /*
47  * Provide a function to raise an IPI cross call on CPUs in callmap.
48  */
49 extern void set_smp_cross_call(void (*)(const struct cpumask *, unsigned int));
50 
51 /*
52  * Called from the secondary holding pen, this is the secondary CPU entry point.
53  */
55 
56 /*
57  * Initial data for bringing up a secondary CPU.
58  */
59 struct secondary_data {
60  void *stack;
61 };
62 extern struct secondary_data secondary_data;
63 extern void secondary_holding_pen(void);
64 extern volatile unsigned long secondary_holding_pen_release;
65 
67 extern void arch_send_call_function_ipi_mask(const struct cpumask *mask);
68 
69 #endif /* ifndef __ASM_SMP_H */