1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun * SMP support for Emma Mobile EV2 4*4882a593Smuzhiyun * 5*4882a593Smuzhiyun * Copyright (C) 2012 Renesas Solutions Corp. 6*4882a593Smuzhiyun * Copyright (C) 2012 Magnus Damm 7*4882a593Smuzhiyun */ 8*4882a593Smuzhiyun #include <linux/kernel.h> 9*4882a593Smuzhiyun #include <linux/init.h> 10*4882a593Smuzhiyun #include <linux/smp.h> 11*4882a593Smuzhiyun #include <linux/spinlock.h> 12*4882a593Smuzhiyun #include <linux/io.h> 13*4882a593Smuzhiyun #include <linux/delay.h> 14*4882a593Smuzhiyun #include <asm/smp_plat.h> 15*4882a593Smuzhiyun #include <asm/smp_scu.h> 16*4882a593Smuzhiyun 17*4882a593Smuzhiyun #include "common.h" 18*4882a593Smuzhiyun #include "emev2.h" 19*4882a593Smuzhiyun 20*4882a593Smuzhiyun #define EMEV2_SCU_BASE 0x1e000000 21*4882a593Smuzhiyun #define EMEV2_SMU_BASE 0xe0110000 22*4882a593Smuzhiyun #define SMU_GENERAL_REG0 0x7c0 23*4882a593Smuzhiyun emev2_boot_secondary(unsigned int cpu,struct task_struct * idle)24*4882a593Smuzhiyunstatic int emev2_boot_secondary(unsigned int cpu, struct task_struct *idle) 25*4882a593Smuzhiyun { 26*4882a593Smuzhiyun arch_send_wakeup_ipi_mask(cpumask_of(cpu_logical_map(cpu))); 27*4882a593Smuzhiyun return 0; 28*4882a593Smuzhiyun } 29*4882a593Smuzhiyun emev2_smp_prepare_cpus(unsigned int max_cpus)30*4882a593Smuzhiyunstatic void __init emev2_smp_prepare_cpus(unsigned int max_cpus) 31*4882a593Smuzhiyun { 32*4882a593Smuzhiyun void __iomem *smu; 33*4882a593Smuzhiyun 34*4882a593Smuzhiyun /* Tell ROM loader about our vector (in headsmp.S) */ 35*4882a593Smuzhiyun smu = ioremap(EMEV2_SMU_BASE, PAGE_SIZE); 36*4882a593Smuzhiyun if (smu) { 37*4882a593Smuzhiyun iowrite32(__pa(shmobile_boot_vector), smu + SMU_GENERAL_REG0); 38*4882a593Smuzhiyun iounmap(smu); 39*4882a593Smuzhiyun } 40*4882a593Smuzhiyun 41*4882a593Smuzhiyun /* setup EMEV2 specific SCU bits */ 42*4882a593Smuzhiyun shmobile_smp_scu_prepare_cpus(EMEV2_SCU_BASE, max_cpus); 43*4882a593Smuzhiyun } 44*4882a593Smuzhiyun 45*4882a593Smuzhiyun const struct smp_operations emev2_smp_ops __initconst = { 46*4882a593Smuzhiyun .smp_prepare_cpus = emev2_smp_prepare_cpus, 47*4882a593Smuzhiyun .smp_boot_secondary = emev2_boot_secondary, 48*4882a593Smuzhiyun }; 49