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// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2020 Western Digital Corporation or its affiliates.
*/
#include <linux/errno.h>
#include <linux/mm.h>
#include <linux/of.h>
#include <linux/string.h>
#include <linux/sched.h>
#include <asm/cpu_ops.h>
#include <asm/sbi.h>
#include <asm/smp.h>
const struct cpu_operations *cpu_ops[NR_CPUS] __ro_after_init;
extern const struct cpu_operations cpu_ops_sbi;
#ifdef CONFIG_RISCV_BOOT_SPINWAIT
extern const struct cpu_operations cpu_ops_spinwait;
#else
const struct cpu_operations cpu_ops_spinwait = {
.name = "",
.cpu_prepare = NULL,
.cpu_start = NULL,
};
#endif
void __init cpu_set_ops(int cpuid)
{
#if IS_ENABLED(CONFIG_RISCV_SBI)
if (sbi_probe_extension(SBI_EXT_HSM) > 0) {
if (!cpuid)
pr_info("SBI HSM extension detected\n");
cpu_ops[cpuid] = &cpu_ops_sbi;
} else
#endif
cpu_ops[cpuid] = &cpu_ops_spinwait;
}
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