18c2ecf20Sopenharmony_ci// SPDX-License-Identifier: GPL-2.0 28c2ecf20Sopenharmony_ci/* 38c2ecf20Sopenharmony_ci * SMP support for R-Mobile / SH-Mobile - sh73a0 portion 48c2ecf20Sopenharmony_ci * 58c2ecf20Sopenharmony_ci * Copyright (C) 2010 Magnus Damm 68c2ecf20Sopenharmony_ci * Copyright (C) 2010 Takashi Yoshii 78c2ecf20Sopenharmony_ci */ 88c2ecf20Sopenharmony_ci#include <linux/kernel.h> 98c2ecf20Sopenharmony_ci#include <linux/init.h> 108c2ecf20Sopenharmony_ci#include <linux/smp.h> 118c2ecf20Sopenharmony_ci#include <linux/io.h> 128c2ecf20Sopenharmony_ci#include <linux/delay.h> 138c2ecf20Sopenharmony_ci 148c2ecf20Sopenharmony_ci#include <asm/smp_plat.h> 158c2ecf20Sopenharmony_ci 168c2ecf20Sopenharmony_ci#include "common.h" 178c2ecf20Sopenharmony_ci#include "sh73a0.h" 188c2ecf20Sopenharmony_ci 198c2ecf20Sopenharmony_ci#define WUPCR IOMEM(0xe6151010) 208c2ecf20Sopenharmony_ci#define SRESCR IOMEM(0xe6151018) 218c2ecf20Sopenharmony_ci#define PSTR IOMEM(0xe6151040) 228c2ecf20Sopenharmony_ci#define SBAR IOMEM(0xe6180020) 238c2ecf20Sopenharmony_ci#define APARMBAREA IOMEM(0xe6f10020) 248c2ecf20Sopenharmony_ci 258c2ecf20Sopenharmony_ci#define SH73A0_SCU_BASE 0xf0000000 268c2ecf20Sopenharmony_ci 278c2ecf20Sopenharmony_cistatic int sh73a0_boot_secondary(unsigned int cpu, struct task_struct *idle) 288c2ecf20Sopenharmony_ci{ 298c2ecf20Sopenharmony_ci unsigned int lcpu = cpu_logical_map(cpu); 308c2ecf20Sopenharmony_ci 318c2ecf20Sopenharmony_ci if (((__raw_readl(PSTR) >> (4 * lcpu)) & 3) == 3) 328c2ecf20Sopenharmony_ci __raw_writel(1 << lcpu, WUPCR); /* wake up */ 338c2ecf20Sopenharmony_ci else 348c2ecf20Sopenharmony_ci __raw_writel(1 << lcpu, SRESCR); /* reset */ 358c2ecf20Sopenharmony_ci 368c2ecf20Sopenharmony_ci return 0; 378c2ecf20Sopenharmony_ci} 388c2ecf20Sopenharmony_ci 398c2ecf20Sopenharmony_cistatic void __init sh73a0_smp_prepare_cpus(unsigned int max_cpus) 408c2ecf20Sopenharmony_ci{ 418c2ecf20Sopenharmony_ci /* Map the reset vector (in headsmp.S) */ 428c2ecf20Sopenharmony_ci __raw_writel(0, APARMBAREA); /* 4k */ 438c2ecf20Sopenharmony_ci __raw_writel(__pa(shmobile_boot_vector), SBAR); 448c2ecf20Sopenharmony_ci 458c2ecf20Sopenharmony_ci /* setup sh73a0 specific SCU bits */ 468c2ecf20Sopenharmony_ci shmobile_smp_scu_prepare_cpus(SH73A0_SCU_BASE, max_cpus); 478c2ecf20Sopenharmony_ci} 488c2ecf20Sopenharmony_ci 498c2ecf20Sopenharmony_ciconst struct smp_operations sh73a0_smp_ops __initconst = { 508c2ecf20Sopenharmony_ci .smp_prepare_cpus = sh73a0_smp_prepare_cpus, 518c2ecf20Sopenharmony_ci .smp_boot_secondary = sh73a0_boot_secondary, 528c2ecf20Sopenharmony_ci#ifdef CONFIG_HOTPLUG_CPU 538c2ecf20Sopenharmony_ci .cpu_can_disable = shmobile_smp_cpu_can_disable, 548c2ecf20Sopenharmony_ci .cpu_die = shmobile_smp_scu_cpu_die, 558c2ecf20Sopenharmony_ci .cpu_kill = shmobile_smp_scu_cpu_kill, 568c2ecf20Sopenharmony_ci#endif 578c2ecf20Sopenharmony_ci}; 58