1/*
2 * SMP support for Emma Mobile EV2
3 *
4 * Copyright (C) 2012  Renesas Solutions Corp.
5 * Copyright (C) 2012  Magnus Damm
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; version 2 of the License.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14 * GNU General Public License for more details.
15 */
16#include <linux/kernel.h>
17#include <linux/init.h>
18#include <linux/smp.h>
19#include <linux/spinlock.h>
20#include <linux/io.h>
21#include <linux/delay.h>
22#include <asm/smp_plat.h>
23#include <asm/smp_scu.h>
24#include "common.h"
25
26#define EMEV2_SCU_BASE 0x1e000000
27#define EMEV2_SMU_BASE 0xe0110000
28#define SMU_GENERAL_REG0 0x7c0
29
30static int emev2_boot_secondary(unsigned int cpu, struct task_struct *idle)
31{
32	arch_send_wakeup_ipi_mask(cpumask_of(cpu_logical_map(cpu)));
33	return 0;
34}
35
36static void __init emev2_smp_prepare_cpus(unsigned int max_cpus)
37{
38	void __iomem *smu;
39
40	/* Tell ROM loader about our vector (in headsmp.S) */
41	smu = ioremap(EMEV2_SMU_BASE, PAGE_SIZE);
42	if (smu) {
43		iowrite32(__pa(shmobile_boot_vector), smu + SMU_GENERAL_REG0);
44		iounmap(smu);
45	}
46
47	/* setup EMEV2 specific SCU bits */
48	shmobile_scu_base = ioremap(EMEV2_SCU_BASE, PAGE_SIZE);
49	shmobile_smp_scu_prepare_cpus(max_cpus);
50}
51
52struct smp_operations emev2_smp_ops __initdata = {
53	.smp_prepare_cpus	= emev2_smp_prepare_cpus,
54	.smp_boot_secondary	= emev2_boot_secondary,
55};
56