mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-20 02:46:44 +07:00
8fc0d470bc
After the cleanup in r8a7779_smp_prepare_cpus(), the only remaining caller of
r8a7779_platform_cpu_kill() is in an ifdef, which leads to a build warning
without CONFIG_HOTPLUG_CPU:
arch/arm/mach-shmobile/smp-r8a7779.c:26:12: error: 'r8a7779_platform_cpu_kill' defined but not used [-Werror=unused-function]
This moves the function inside of that #ifdef to avoid the warning.
Fixes: 62f55ce683 ("ARM: shmobile: r8a7779: Stop powering down secondary CPUs during early boot")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
75 lines
1.6 KiB
C
75 lines
1.6 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* SMP support for R-Mobile / SH-Mobile - r8a7779 portion
|
|
*
|
|
* Copyright (C) 2011 Renesas Solutions Corp.
|
|
* Copyright (C) 2011 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 <linux/soc/renesas/rcar-sysc.h>
|
|
|
|
#include <asm/cacheflush.h>
|
|
#include <asm/smp_plat.h>
|
|
#include <asm/smp_scu.h>
|
|
|
|
#include "common.h"
|
|
#include "r8a7779.h"
|
|
|
|
#define AVECR IOMEM(0xfe700040)
|
|
#define R8A7779_SCU_BASE 0xf0000000
|
|
|
|
static int r8a7779_boot_secondary(unsigned int cpu, struct task_struct *idle)
|
|
{
|
|
int ret = -EIO;
|
|
|
|
cpu = cpu_logical_map(cpu);
|
|
if (cpu)
|
|
ret = rcar_sysc_power_up_cpu(cpu);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void __init r8a7779_smp_prepare_cpus(unsigned int max_cpus)
|
|
{
|
|
/* Map the reset vector (in headsmp-scu.S, headsmp.S) */
|
|
__raw_writel(__pa(shmobile_boot_vector), AVECR);
|
|
|
|
/* setup r8a7779 specific SCU bits */
|
|
shmobile_smp_scu_prepare_cpus(R8A7779_SCU_BASE, max_cpus);
|
|
}
|
|
|
|
#ifdef CONFIG_HOTPLUG_CPU
|
|
static int r8a7779_platform_cpu_kill(unsigned int cpu)
|
|
{
|
|
int ret = -EIO;
|
|
|
|
cpu = cpu_logical_map(cpu);
|
|
if (cpu)
|
|
ret = rcar_sysc_power_down_cpu(cpu);
|
|
|
|
return ret ? ret : 1;
|
|
}
|
|
|
|
static int r8a7779_cpu_kill(unsigned int cpu)
|
|
{
|
|
if (shmobile_smp_scu_cpu_kill(cpu))
|
|
return r8a7779_platform_cpu_kill(cpu);
|
|
|
|
return 0;
|
|
}
|
|
#endif /* CONFIG_HOTPLUG_CPU */
|
|
|
|
const struct smp_operations r8a7779_smp_ops __initconst = {
|
|
.smp_prepare_cpus = r8a7779_smp_prepare_cpus,
|
|
.smp_boot_secondary = r8a7779_boot_secondary,
|
|
#ifdef CONFIG_HOTPLUG_CPU
|
|
.cpu_die = shmobile_smp_scu_cpu_die,
|
|
.cpu_kill = r8a7779_cpu_kill,
|
|
#endif
|
|
};
|