| /* | |
| * 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 = virt_to_phys(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 struct smp_operations alpine_smp_ops __initdata = { | |
| .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); |