mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-05 09:06:45 +07:00
344bc8b0c8
Now when CPU notifiers are used for SCU boot vector setup shmobile_smp_scu_boot_secondary() is no longer needed. Signed-off-by: Magnus Damm <damm@opensource.se> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
78 lines
2.3 KiB
C
78 lines
2.3 KiB
C
/*
|
|
* SMP support for R-Mobile / SH-Mobile - sh73a0 portion
|
|
*
|
|
* Copyright (C) 2010 Magnus Damm
|
|
* Copyright (C) 2010 Takashi Yoshii
|
|
*
|
|
* 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/io.h>
|
|
#include <linux/delay.h>
|
|
#include <mach/common.h>
|
|
#include <mach/sh73a0.h>
|
|
#include <asm/smp_plat.h>
|
|
#include <asm/smp_twd.h>
|
|
|
|
#define WUPCR IOMEM(0xe6151010)
|
|
#define SRESCR IOMEM(0xe6151018)
|
|
#define PSTR IOMEM(0xe6151040)
|
|
#define SBAR IOMEM(0xe6180020)
|
|
#define APARMBAREA IOMEM(0xe6f10020)
|
|
|
|
#define SH73A0_SCU_BASE 0xf0000000
|
|
|
|
#ifdef CONFIG_HAVE_ARM_TWD
|
|
static DEFINE_TWD_LOCAL_TIMER(twd_local_timer, SH73A0_SCU_BASE + 0x600, 29);
|
|
void __init sh73a0_register_twd(void)
|
|
{
|
|
twd_local_timer_register(&twd_local_timer);
|
|
}
|
|
#endif
|
|
|
|
static int sh73a0_boot_secondary(unsigned int cpu, struct task_struct *idle)
|
|
{
|
|
unsigned int lcpu = cpu_logical_map(cpu);
|
|
|
|
if (((__raw_readl(PSTR) >> (4 * lcpu)) & 3) == 3)
|
|
__raw_writel(1 << lcpu, WUPCR); /* wake up */
|
|
else
|
|
__raw_writel(1 << lcpu, SRESCR); /* reset */
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void __init sh73a0_smp_prepare_cpus(unsigned int max_cpus)
|
|
{
|
|
/* Map the reset vector (in headsmp.S) */
|
|
__raw_writel(0, APARMBAREA); /* 4k */
|
|
__raw_writel(__pa(shmobile_boot_vector), SBAR);
|
|
|
|
/* setup sh73a0 specific SCU bits */
|
|
shmobile_scu_base = IOMEM(SH73A0_SCU_BASE);
|
|
shmobile_smp_scu_prepare_cpus(max_cpus);
|
|
}
|
|
|
|
struct smp_operations sh73a0_smp_ops __initdata = {
|
|
.smp_prepare_cpus = sh73a0_smp_prepare_cpus,
|
|
.smp_boot_secondary = sh73a0_boot_secondary,
|
|
#ifdef CONFIG_HOTPLUG_CPU
|
|
.cpu_disable = shmobile_smp_cpu_disable,
|
|
.cpu_die = shmobile_smp_scu_cpu_die,
|
|
.cpu_kill = shmobile_smp_scu_cpu_kill,
|
|
#endif
|
|
};
|