162306a36Sopenharmony_ci// SPDX-License-Identifier: GPL-2.0 262306a36Sopenharmony_ci/* 362306a36Sopenharmony_ci * SMP support for Emma Mobile EV2 462306a36Sopenharmony_ci * 562306a36Sopenharmony_ci * Copyright (C) 2012 Renesas Solutions Corp. 662306a36Sopenharmony_ci * Copyright (C) 2012 Magnus Damm 762306a36Sopenharmony_ci */ 862306a36Sopenharmony_ci#include <linux/kernel.h> 962306a36Sopenharmony_ci#include <linux/init.h> 1062306a36Sopenharmony_ci#include <linux/smp.h> 1162306a36Sopenharmony_ci#include <linux/spinlock.h> 1262306a36Sopenharmony_ci#include <linux/io.h> 1362306a36Sopenharmony_ci#include <linux/delay.h> 1462306a36Sopenharmony_ci#include <asm/smp_plat.h> 1562306a36Sopenharmony_ci#include <asm/smp_scu.h> 1662306a36Sopenharmony_ci 1762306a36Sopenharmony_ci#include "common.h" 1862306a36Sopenharmony_ci#include "emev2.h" 1962306a36Sopenharmony_ci 2062306a36Sopenharmony_ci#define EMEV2_SCU_BASE 0x1e000000 2162306a36Sopenharmony_ci#define EMEV2_SMU_BASE 0xe0110000 2262306a36Sopenharmony_ci#define SMU_GENERAL_REG0 0x7c0 2362306a36Sopenharmony_ci 2462306a36Sopenharmony_cistatic int emev2_boot_secondary(unsigned int cpu, struct task_struct *idle) 2562306a36Sopenharmony_ci{ 2662306a36Sopenharmony_ci arch_send_wakeup_ipi_mask(cpumask_of(cpu_logical_map(cpu))); 2762306a36Sopenharmony_ci return 0; 2862306a36Sopenharmony_ci} 2962306a36Sopenharmony_ci 3062306a36Sopenharmony_cistatic void __init emev2_smp_prepare_cpus(unsigned int max_cpus) 3162306a36Sopenharmony_ci{ 3262306a36Sopenharmony_ci void __iomem *smu; 3362306a36Sopenharmony_ci 3462306a36Sopenharmony_ci /* Tell ROM loader about our vector (in headsmp.S) */ 3562306a36Sopenharmony_ci smu = ioremap(EMEV2_SMU_BASE, PAGE_SIZE); 3662306a36Sopenharmony_ci if (smu) { 3762306a36Sopenharmony_ci iowrite32(__pa(shmobile_boot_vector), smu + SMU_GENERAL_REG0); 3862306a36Sopenharmony_ci iounmap(smu); 3962306a36Sopenharmony_ci } 4062306a36Sopenharmony_ci 4162306a36Sopenharmony_ci /* setup EMEV2 specific SCU bits */ 4262306a36Sopenharmony_ci shmobile_smp_scu_prepare_cpus(EMEV2_SCU_BASE, max_cpus); 4362306a36Sopenharmony_ci} 4462306a36Sopenharmony_ci 4562306a36Sopenharmony_ciconst struct smp_operations emev2_smp_ops __initconst = { 4662306a36Sopenharmony_ci .smp_prepare_cpus = emev2_smp_prepare_cpus, 4762306a36Sopenharmony_ci .smp_boot_secondary = emev2_boot_secondary, 4862306a36Sopenharmony_ci}; 49