blob: 3853ecea44ca021c533c0168ce38d0889dfe412c (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
|
// 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,
};
|
