2 * SMP operations for Alpine platform.
4 * Copyright (C) 2015 Annapurna Labs 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 as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
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.
17 #include <linux/init.h>
18 #include <linux/errno.h>
22 #include <asm/smp_plat.h>
24 #include "alpine_cpu_pm.h"
26 static int alpine_boot_secondary(unsigned int cpu, struct task_struct *idle)
30 addr = __pa_symbol(secondary_startup);
32 if (addr > (phys_addr_t)(uint32_t)(-1)) {
33 pr_err("FAIL: resume address over 32bit (%pa)", &addr);
37 return alpine_cpu_wakeup(cpu_logical_map(cpu), (uint32_t)addr);
40 static void __init alpine_smp_prepare_cpus(unsigned int max_cpus)
45 static const struct smp_operations alpine_smp_ops __initconst = {
46 .smp_prepare_cpus = alpine_smp_prepare_cpus,
47 .smp_boot_secondary = alpine_boot_secondary,
49 CPU_METHOD_OF_DECLARE(alpine_smp, "al,alpine-smp", &alpine_smp_ops);