Merge tag 'perf-urgent-for-mingo-4.14-20170928' of git://git.kernel.org/pub/scm/linux...
[sfrench/cifs-2.6.git] / arch / mips / kernel / smp-up.c
1 /*
2  * This file is subject to the terms and conditions of the GNU General Public
3  * License.  See the file "COPYING" in the main directory of this archive
4  * for more details.
5  *
6  * Copyright (C) 2006, 07 by Ralf Baechle (ralf@linux-mips.org)
7  *
8  * Symmetric Uniprocessor (TM) Support
9  */
10 #include <linux/kernel.h>
11 #include <linux/sched.h>
12
13 /*
14  * Send inter-processor interrupt
15  */
16 static void up_send_ipi_single(int cpu, unsigned int action)
17 {
18         panic(KERN_ERR "%s called", __func__);
19 }
20
21 static inline void up_send_ipi_mask(const struct cpumask *mask,
22                                     unsigned int action)
23 {
24         panic(KERN_ERR "%s called", __func__);
25 }
26
27 /*
28  *  After we've done initial boot, this function is called to allow the
29  *  board code to clean up state, if needed
30  */
31 static void up_init_secondary(void)
32 {
33 }
34
35 static void up_smp_finish(void)
36 {
37 }
38
39 /*
40  * Firmware CPU startup hook
41  */
42 static int up_boot_secondary(int cpu, struct task_struct *idle)
43 {
44         return 0;
45 }
46
47 static void __init up_smp_setup(void)
48 {
49 }
50
51 static void __init up_prepare_cpus(unsigned int max_cpus)
52 {
53 }
54
55 #ifdef CONFIG_HOTPLUG_CPU
56 static int up_cpu_disable(void)
57 {
58         return -ENOSYS;
59 }
60
61 static void up_cpu_die(unsigned int cpu)
62 {
63         BUG();
64 }
65 #endif
66
67 const struct plat_smp_ops up_smp_ops = {
68         .send_ipi_single        = up_send_ipi_single,
69         .send_ipi_mask          = up_send_ipi_mask,
70         .init_secondary         = up_init_secondary,
71         .smp_finish             = up_smp_finish,
72         .boot_secondary         = up_boot_secondary,
73         .smp_setup              = up_smp_setup,
74         .prepare_cpus           = up_prepare_cpus,
75 #ifdef CONFIG_HOTPLUG_CPU
76         .cpu_disable            = up_cpu_disable,
77         .cpu_die                = up_cpu_die,
78 #endif
79 };