/* * SMP support for Emma Mobile EV2 * * Copyright (C) 2012 Renesas Solutions Corp. * Copyright (C) 2012 Magnus Damm * * 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; version 2 of the License. * * 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/kernel.h> #include <linux/init.h> #include <linux/smp.h> #include <linux/spinlock.h> #include <linux/io.h> #include <linux/delay.h> #include <asm/smp_plat.h> #include <asm/smp_scu.h> #include "common.h" #include "emev2.h" #define EMEV2_SCU_BASE 0x1e000000 #define EMEV2_SMU_BASE 0xe0110000 #define SMU_GENERAL_REG0 0x7c0 static int emev2_boot_secondary(unsigned int cpu, struct task_struct *idle) { arch_send_wakeup_ipi_mask(cpumask_of(cpu_logical_map(cpu))); return 0; } static void __init emev2_smp_prepare_cpus(unsigned int max_cpus) { void __iomem *smu; /* Tell ROM loader about our vector (in headsmp.S) */ smu = ioremap(EMEV2_SMU_BASE, PAGE_SIZE); if (smu) { iowrite32(__pa(shmobile_boot_vector), smu + SMU_GENERAL_REG0); iounmap(smu); } /* setup EMEV2 specific SCU bits */ shmobile_smp_scu_prepare_cpus(EMEV2_SCU_BASE, max_cpus); } const struct smp_operations emev2_smp_ops __initconst = { .smp_prepare_cpus = emev2_smp_prepare_cpus, .smp_boot_secondary = emev2_boot_secondary, };