linux/arch/arm/mach-shmobile/smp-r8a7779.c
Geert Uytterhoeven d4a617c9bb ARM: shmobile: Stop using __raw_*() I/O accessors
There is no reason to keep on using the __raw_{read,write}l() I/O
accessors in Renesas ARM platform code.  Switch to using the plain
{read,write}l() I/O accessors, to have a chance that this works on
big-endian.

Suggested-by: Arnd Bergmann <arnd@kernel.org>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Link: https://lore.kernel.org/r/20201117142447.2205664-1-geert+renesas@glider.be
2020-11-23 09:54:59 +01:00

81 lines
1.8 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 HPBREG_BASE 0xfe700000
#define AVECR 0x0040 /* ARM Reset Vector Address Register */
#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)
{
void __iomem *base = ioremap(HPBREG_BASE, 0x1000);
/* Map the reset vector (in headsmp-scu.S, headsmp.S) */
writel(__pa(shmobile_boot_vector), base + AVECR);
/* setup r8a7779 specific SCU bits */
shmobile_smp_scu_prepare_cpus(R8A7779_SCU_BASE, max_cpus);
iounmap(base);
}
#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
};