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