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40 lines
941 B
40 lines
941 B
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* SMP operations for Alpine platform. |
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* |
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* Copyright (C) 2015 Annapurna Labs Ltd. |
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*/ |
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#include <linux/init.h> |
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#include <linux/errno.h> |
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#include <linux/io.h> |
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#include <linux/of.h> |
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#include <asm/smp_plat.h> |
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#include "alpine_cpu_pm.h" |
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static int alpine_boot_secondary(unsigned int cpu, struct task_struct *idle) |
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{ |
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phys_addr_t addr; |
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addr = __pa_symbol(secondary_startup); |
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if (addr > (phys_addr_t)(uint32_t)(-1)) { |
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pr_err("FAIL: resume address over 32bit (%pa)", &addr); |
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return -EINVAL; |
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} |
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return alpine_cpu_wakeup(cpu_logical_map(cpu), (uint32_t)addr); |
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} |
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static void __init alpine_smp_prepare_cpus(unsigned int max_cpus) |
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{ |
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alpine_cpu_pm_init(); |
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} |
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static const struct smp_operations alpine_smp_ops __initconst = { |
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.smp_prepare_cpus = alpine_smp_prepare_cpus, |
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.smp_boot_secondary = alpine_boot_secondary, |
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}; |
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CPU_METHOD_OF_DECLARE(alpine_smp, "al,alpine-smp", &alpine_smp_ops);
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