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80 lines
1.8 KiB
80 lines
1.8 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* SMP support for R-Mobile / SH-Mobile - r8a7779 portion |
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* |
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* Copyright (C) 2011 Renesas Solutions Corp. |
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* Copyright (C) 2011 Magnus Damm |
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*/ |
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#include <linux/kernel.h> |
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#include <linux/init.h> |
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#include <linux/smp.h> |
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#include <linux/spinlock.h> |
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#include <linux/io.h> |
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#include <linux/delay.h> |
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#include <linux/soc/renesas/rcar-sysc.h> |
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#include <asm/cacheflush.h> |
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#include <asm/smp_plat.h> |
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#include <asm/smp_scu.h> |
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#include "common.h" |
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#include "r8a7779.h" |
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#define HPBREG_BASE 0xfe700000 |
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#define AVECR 0x0040 /* ARM Reset Vector Address Register */ |
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#define R8A7779_SCU_BASE 0xf0000000 |
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static int r8a7779_boot_secondary(unsigned int cpu, struct task_struct *idle) |
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{ |
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int ret = -EIO; |
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cpu = cpu_logical_map(cpu); |
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if (cpu) |
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ret = rcar_sysc_power_up_cpu(cpu); |
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return ret; |
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} |
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static void __init r8a7779_smp_prepare_cpus(unsigned int max_cpus) |
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{ |
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void __iomem *base = ioremap(HPBREG_BASE, 0x1000); |
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/* Map the reset vector (in headsmp-scu.S, headsmp.S) */ |
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writel(__pa(shmobile_boot_vector), base + AVECR); |
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/* setup r8a7779 specific SCU bits */ |
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shmobile_smp_scu_prepare_cpus(R8A7779_SCU_BASE, max_cpus); |
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iounmap(base); |
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} |
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#ifdef CONFIG_HOTPLUG_CPU |
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static int r8a7779_platform_cpu_kill(unsigned int cpu) |
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{ |
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int ret = -EIO; |
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cpu = cpu_logical_map(cpu); |
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if (cpu) |
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ret = rcar_sysc_power_down_cpu(cpu); |
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return ret ? ret : 1; |
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} |
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static int r8a7779_cpu_kill(unsigned int cpu) |
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{ |
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if (shmobile_smp_scu_cpu_kill(cpu)) |
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return r8a7779_platform_cpu_kill(cpu); |
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return 0; |
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} |
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#endif /* CONFIG_HOTPLUG_CPU */ |
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const struct smp_operations r8a7779_smp_ops __initconst = { |
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.smp_prepare_cpus = r8a7779_smp_prepare_cpus, |
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.smp_boot_secondary = r8a7779_boot_secondary, |
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#ifdef CONFIG_HOTPLUG_CPU |
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.cpu_die = shmobile_smp_scu_cpu_die, |
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.cpu_kill = r8a7779_cpu_kill, |
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#endif |
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};
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