/* * SMP operations for Alpine platform. * * Copyright (C) 2015 Annapurna Labs Ltd. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. */ #include <linux/init.h> #include <linux/errno.h> #include <linux/io.h> #include <linux/of.h> #include <asm/smp_plat.h> #include "alpine_cpu_pm.h" static int alpine_boot_secondary(unsigned int cpu, struct task_struct *idle) { phys_addr_t addr; addr = __pa_symbol(secondary_startup); if (addr > (phys_addr_t)(uint32_t)(-1)) { pr_err("FAIL: resume address over 32bit (%pa)", &addr); return -EINVAL; } return alpine_cpu_wakeup(cpu_logical_map(cpu), (uint32_t)addr); } static void __init alpine_smp_prepare_cpus(unsigned int max_cpus) { alpine_cpu_pm_init(); } static const struct smp_operations alpine_smp_ops __initconst = { .smp_prepare_cpus = alpine_smp_prepare_cpus, .smp_boot_secondary = alpine_boot_secondary, }; CPU_METHOD_OF_DECLARE(alpine_smp, "al,alpine-smp", &alpine_smp_ops);