mirror of https://gitee.com/openkylin/linux.git
70 lines
2.1 KiB
C
70 lines
2.1 KiB
C
/*
|
|
* SMP support for Emma Mobile EV2
|
|
*
|
|
* Copyright (C) 2012 Renesas Solutions Corp.
|
|
* Copyright (C) 2012 Magnus Damm
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; version 2 of the License.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
#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 <mach/common.h>
|
|
#include <mach/emev2.h>
|
|
#include <asm/smp_plat.h>
|
|
#include <asm/smp_scu.h>
|
|
|
|
#define EMEV2_SCU_BASE 0x1e000000
|
|
|
|
static int __cpuinit 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)
|
|
{
|
|
scu_enable(shmobile_scu_base);
|
|
|
|
/* Tell ROM loader about our vector (in headsmp-scu.S, headsmp.S) */
|
|
emev2_set_boot_vector(__pa(shmobile_boot_vector));
|
|
shmobile_boot_fn = virt_to_phys(shmobile_boot_scu);
|
|
shmobile_boot_arg = (unsigned long)shmobile_scu_base;
|
|
|
|
/* enable cache coherency on booting CPU */
|
|
scu_power_mode(shmobile_scu_base, SCU_PM_NORMAL);
|
|
}
|
|
|
|
static void __init emev2_smp_init_cpus(void)
|
|
{
|
|
unsigned int ncores;
|
|
|
|
/* setup EMEV2 specific SCU base */
|
|
shmobile_scu_base = ioremap(EMEV2_SCU_BASE, PAGE_SIZE);
|
|
emev2_clock_init(); /* need ioremapped SMU */
|
|
|
|
ncores = shmobile_scu_base ? scu_get_core_count(shmobile_scu_base) : 1;
|
|
|
|
shmobile_smp_init_cpus(ncores);
|
|
}
|
|
|
|
struct smp_operations emev2_smp_ops __initdata = {
|
|
.smp_init_cpus = emev2_smp_init_cpus,
|
|
.smp_prepare_cpus = emev2_smp_prepare_cpus,
|
|
.smp_boot_secondary = emev2_boot_secondary,
|
|
};
|