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e9e06f28 TZ |
1 | /* |
2 | * SMP operations for Alpine platform. | |
3 | * | |
4 | * Copyright (C) 2015 Annapurna Labs Ltd. | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | */ | |
16 | ||
17 | #include <linux/init.h> | |
18 | #include <linux/errno.h> | |
19 | #include <linux/io.h> | |
20 | #include <linux/of.h> | |
21 | ||
22 | #include <asm/smp_plat.h> | |
23 | ||
24 | #include "alpine_cpu_pm.h" | |
25 | ||
26 | static int alpine_boot_secondary(unsigned int cpu, struct task_struct *idle) | |
27 | { | |
28 | phys_addr_t addr; | |
29 | ||
30 | addr = virt_to_phys(secondary_startup); | |
31 | ||
32 | if (addr > (phys_addr_t)(uint32_t)(-1)) { | |
33 | pr_err("FAIL: resume address over 32bit (%pa)", &addr); | |
34 | return -EINVAL; | |
35 | } | |
36 | ||
37 | return alpine_cpu_wakeup(cpu_logical_map(cpu), (uint32_t)addr); | |
38 | } | |
39 | ||
40 | static void __init alpine_smp_prepare_cpus(unsigned int max_cpus) | |
41 | { | |
42 | alpine_cpu_pm_init(); | |
43 | } | |
44 | ||
75305275 | 45 | static const struct smp_operations alpine_smp_ops __initconst = { |
e9e06f28 TZ |
46 | .smp_prepare_cpus = alpine_smp_prepare_cpus, |
47 | .smp_boot_secondary = alpine_boot_secondary, | |
48 | }; | |
49 | CPU_METHOD_OF_DECLARE(alpine_smp, "al,alpine-smp", &alpine_smp_ops); |