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 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
19 */
20#include <linux/kernel.h>
21#include <linux/init.h>
22#include <linux/smp.h>
23#include <linux/spinlock.h>
24#include <linux/io.h>
25#include <linux/delay.h>
26#include <asm/smp_plat.h>
27#include <asm/smp_scu.h>
28#include "common.h"
29
30#define EMEV2_SCU_BASE 0x1e000000
31#define EMEV2_SMU_BASE 0xe0110000
32#define SMU_GENERAL_REG0 0x7c0
33
34static int emev2_boot_secondary(unsigned int cpu, struct task_struct *idle)
35{
36	arch_send_wakeup_ipi_mask(cpumask_of(cpu_logical_map(cpu)));
37	return 0;
38}
39
40static void __init emev2_smp_prepare_cpus(unsigned int max_cpus)
41{
42	void __iomem *smu;
43
44	/* Tell ROM loader about our vector (in headsmp.S) */
45	smu = ioremap(EMEV2_SMU_BASE, PAGE_SIZE);
46	if (smu) {
47		iowrite32(__pa(shmobile_boot_vector), smu + SMU_GENERAL_REG0);
48		iounmap(smu);
49	}
50
51	/* setup EMEV2 specific SCU bits */
52	shmobile_scu_base = ioremap(EMEV2_SCU_BASE, PAGE_SIZE);
53	shmobile_smp_scu_prepare_cpus(max_cpus);
54}
55
56struct smp_operations emev2_smp_ops __initdata = {
57	.smp_prepare_cpus	= emev2_smp_prepare_cpus,
58	.smp_boot_secondary	= emev2_boot_secondary,
59};
60