Release 4.11 arch/arm/mach-shmobile/smp-r8a7779.c
/*
* SMP support for R-Mobile / SH-Mobile - r8a7779 portion
*
* Copyright (C) 2011 Renesas Solutions Corp.
* Copyright (C) 2011 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.
*/
#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 const struct rcar_sysc_ch r8a7779_ch_cpu1 = {
.chan_offs = 0x40, /* PWRSR0 .. PWRER0 */
.chan_bit = 1, /* ARM1 */
.isr_bit = 1, /* ARM1 */
};
static const struct rcar_sysc_ch r8a7779_ch_cpu2 = {
.chan_offs = 0x40, /* PWRSR0 .. PWRER0 */
.chan_bit = 2, /* ARM2 */
.isr_bit = 2, /* ARM2 */
};
static const struct rcar_sysc_ch r8a7779_ch_cpu3 = {
.chan_offs = 0x40, /* PWRSR0 .. PWRER0 */
.chan_bit = 3, /* ARM3 */
.isr_bit = 3, /* ARM3 */
};
static const struct rcar_sysc_ch * const r8a7779_ch_cpu[4] = {
[1] = &r8a7779_ch_cpu1,
[2] = &r8a7779_ch_cpu2,
[3] = &r8a7779_ch_cpu3,
};
static int r8a7779_platform_cpu_kill(unsigned int cpu)
{
const struct rcar_sysc_ch *ch = NULL;
int ret = -EIO;
cpu = cpu_logical_map(cpu);
if (cpu < ARRAY_SIZE(r8a7779_ch_cpu))
ch = r8a7779_ch_cpu[cpu];
if (ch)
ret = rcar_sysc_power_down(ch);
return ret ? ret : 1;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Magnus Damm | 63 | 96.92% | 2 | 50.00% |
| Marc Zyngier | 1 | 1.54% | 1 | 25.00% |
| Geert Uytterhoeven | 1 | 1.54% | 1 | 25.00% |
| Total | 65 | 100.00% | 4 | 100.00% |
static int r8a7779_boot_secondary(unsigned int cpu, struct task_struct *idle)
{
const struct rcar_sysc_ch *ch = NULL;
unsigned int lcpu = cpu_logical_map(cpu);
int ret;
if (lcpu < ARRAY_SIZE(r8a7779_ch_cpu))
ch = r8a7779_ch_cpu[lcpu];
if (ch)
ret = rcar_sysc_power_up(ch);
else
ret = -EIO;
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Magnus Damm | 64 | 90.14% | 3 | 60.00% |
| Marc Zyngier | 6 | 8.45% | 1 | 20.00% |
| Geert Uytterhoeven | 1 | 1.41% | 1 | 20.00% |
| Total | 71 | 100.00% | 5 | 100.00% |
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);
r8a7779_pm_init();
/* power off secondary CPUs */
r8a7779_platform_cpu_kill(1);
r8a7779_platform_cpu_kill(2);
r8a7779_platform_cpu_kill(3);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Magnus Damm | 43 | 87.76% | 3 | 60.00% |
| Marc Zyngier | 4 | 8.16% | 1 | 20.00% |
| Geert Uytterhoeven | 2 | 4.08% | 1 | 20.00% |
| Total | 49 | 100.00% | 5 | 100.00% |
#ifdef CONFIG_HOTPLUG_CPU
static int r8a7779_cpu_kill(unsigned int cpu)
{
if (shmobile_smp_scu_cpu_kill(cpu))
return r8a7779_platform_cpu_kill(cpu);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Magnus Damm | 26 | 100.00% | 2 | 100.00% |
| Total | 26 | 100.00% | 2 | 100.00% |
#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
};
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Magnus Damm | 348 | 84.67% | 10 | 52.63% |
| Marc Zyngier | 40 | 9.73% | 1 | 5.26% |
| Geert Uytterhoeven | 17 | 4.14% | 4 | 21.05% |
| Masahiro Yamada | 2 | 0.49% | 1 | 5.26% |
| Will Deacon | 2 | 0.49% | 1 | 5.26% |
| Laurent Pinchart | 1 | 0.24% | 1 | 5.26% |
| Rob Herring | 1 | 0.24% | 1 | 5.26% |
| Total | 411 | 100.00% | 19 | 100.00% |
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