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114 lines
2.5 KiB
114 lines
2.5 KiB
/* SPDX-License-Identifier: GPL-2.0-only */ |
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/* |
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* Copyright (C) 2012 Regents of the University of California |
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*/ |
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#ifndef _ASM_RISCV_SMP_H |
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#define _ASM_RISCV_SMP_H |
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#include <linux/cpumask.h> |
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#include <linux/irqreturn.h> |
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#include <linux/thread_info.h> |
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#define INVALID_HARTID ULONG_MAX |
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struct seq_file; |
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extern unsigned long boot_cpu_hartid; |
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struct riscv_ipi_ops { |
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void (*ipi_inject)(const struct cpumask *target); |
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void (*ipi_clear)(void); |
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}; |
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#ifdef CONFIG_SMP |
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/* |
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* Mapping between linux logical cpu index and hartid. |
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*/ |
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extern unsigned long __cpuid_to_hartid_map[NR_CPUS]; |
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#define cpuid_to_hartid_map(cpu) __cpuid_to_hartid_map[cpu] |
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/* print IPI stats */ |
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void show_ipi_stats(struct seq_file *p, int prec); |
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/* SMP initialization hook for setup_arch */ |
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void __init setup_smp(void); |
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/* Called from C code, this handles an IPI. */ |
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void handle_IPI(struct pt_regs *regs); |
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/* Hook for the generic smp_call_function_many() routine. */ |
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void arch_send_call_function_ipi_mask(struct cpumask *mask); |
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/* Hook for the generic smp_call_function_single() routine. */ |
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void arch_send_call_function_single_ipi(int cpu); |
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int riscv_hartid_to_cpuid(int hartid); |
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void riscv_cpuid_to_hartid_mask(const struct cpumask *in, struct cpumask *out); |
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/* Set custom IPI operations */ |
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void riscv_set_ipi_ops(const struct riscv_ipi_ops *ops); |
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/* Clear IPI for current CPU */ |
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void riscv_clear_ipi(void); |
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/* Secondary hart entry */ |
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asmlinkage void smp_callin(void); |
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/* |
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* Obtains the hart ID of the currently executing task. This relies on |
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* THREAD_INFO_IN_TASK, but we define that unconditionally. |
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*/ |
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#define raw_smp_processor_id() (current_thread_info()->cpu) |
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#if defined CONFIG_HOTPLUG_CPU |
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int __cpu_disable(void); |
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void __cpu_die(unsigned int cpu); |
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void cpu_stop(void); |
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#else |
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#endif /* CONFIG_HOTPLUG_CPU */ |
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#else |
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static inline void show_ipi_stats(struct seq_file *p, int prec) |
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{ |
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} |
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static inline int riscv_hartid_to_cpuid(int hartid) |
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{ |
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if (hartid == boot_cpu_hartid) |
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return 0; |
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return -1; |
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} |
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static inline unsigned long cpuid_to_hartid_map(int cpu) |
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{ |
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return boot_cpu_hartid; |
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} |
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static inline void riscv_cpuid_to_hartid_mask(const struct cpumask *in, |
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struct cpumask *out) |
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{ |
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cpumask_clear(out); |
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cpumask_set_cpu(boot_cpu_hartid, out); |
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} |
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static inline void riscv_set_ipi_ops(const struct riscv_ipi_ops *ops) |
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{ |
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} |
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static inline void riscv_clear_ipi(void) |
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{ |
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} |
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#endif /* CONFIG_SMP */ |
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#if defined(CONFIG_HOTPLUG_CPU) && (CONFIG_SMP) |
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bool cpu_has_hotplug(unsigned int cpu); |
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#else |
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static inline bool cpu_has_hotplug(unsigned int cpu) |
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{ |
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return false; |
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} |
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#endif |
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#endif /* _ASM_RISCV_SMP_H */
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