| /* |
| * 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); |