| // SPDX-License-Identifier: GPL-2.0 |
| /* |
| * SMP support for Emma Mobile EV2 |
| * |
| * Copyright (C) 2012 Renesas Solutions Corp. |
| * Copyright (C) 2012 Magnus Damm |
| */ |
| #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, |
| }; |