1/* SPDX-License-Identifier: GPL-2.0 */
  2/*
  3 * Author: Huacai Chen <chenhuacai@loongson.cn>
  4 * Copyright (C) 2020-2022 Loongson Technology Corporation Limited
  5 */
  6#ifndef __ASM_SMP_H
  7#define __ASM_SMP_H
  8
  9#include <linux/atomic.h>
 10#include <linux/bitops.h>
 11#include <linux/linkage.h>
 12#include <linux/threads.h>
 13#include <linux/cpumask.h>
 14
 15extern int smp_num_siblings;
 16extern int num_processors;
 17extern int disabled_cpus;
 18extern cpumask_t cpu_sibling_map[];
 19extern cpumask_t cpu_core_map[];
 20extern cpumask_t cpu_foreign_map[];
 21
 22void loongson_smp_setup(void);
 23void loongson_prepare_cpus(unsigned int max_cpus);
 24void loongson_boot_secondary(int cpu, struct task_struct *idle);
 25void loongson_init_secondary(void);
 26void loongson_smp_finish(void);
 27void loongson_send_ipi_single(int cpu, unsigned int action);
 28void loongson_send_ipi_mask(const struct cpumask *mask, unsigned int action);
 29#ifdef CONFIG_HOTPLUG_CPU
 30int loongson_cpu_disable(void);
 31void loongson_cpu_die(unsigned int cpu);
 32#endif
 33
 34static inline void plat_smp_setup(void)
 35{
 36	loongson_smp_setup();
 37}
 38
 39static inline int raw_smp_processor_id(void)
 40{
 41#if defined(__VDSO__)
 42	extern int vdso_smp_processor_id(void)
 43		__compiletime_error("VDSO should not call smp_processor_id()");
 44	return vdso_smp_processor_id();
 45#else
 46	return current_thread_info()->cpu;
 47#endif
 48}
 49#define raw_smp_processor_id raw_smp_processor_id
 50
 51/* Map from cpu id to sequential logical cpu number.  This will only
 52 * not be idempotent when cpus failed to come on-line.	*/
 53extern int __cpu_number_map[NR_CPUS];
 54#define cpu_number_map(cpu)  __cpu_number_map[cpu]
 55
 56/* The reverse map from sequential logical cpu number to cpu id.  */
 57extern int __cpu_logical_map[NR_CPUS];
 58#define cpu_logical_map(cpu)  __cpu_logical_map[cpu]
 59
 60#define cpu_physical_id(cpu)	cpu_logical_map(cpu)
 61
 62#define SMP_BOOT_CPU		0x1
 63#define SMP_RESCHEDULE		0x2
 64#define SMP_CALL_FUNCTION	0x4
 65
 66struct secondary_data {
 67	unsigned long stack;
 68	unsigned long thread_info;
 69};
 70extern struct secondary_data cpuboot_data;
 71
 72extern asmlinkage void smpboot_entry(void);
 73
 74extern void calculate_cpu_foreign_map(void);
 75
 76/*
 77 * Generate IPI list text
 78 */
 79extern void show_ipi_list(struct seq_file *p, int prec);
 80
 81static inline void arch_send_call_function_single_ipi(int cpu)
 82{
 83	loongson_send_ipi_single(cpu, SMP_CALL_FUNCTION);
 84}
 85
 86static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask)
 87{
 88	loongson_send_ipi_mask(mask, SMP_CALL_FUNCTION);
 89}
 90
 91#ifdef CONFIG_HOTPLUG_CPU
 92static inline int __cpu_disable(void)
 93{
 94	return loongson_cpu_disable();
 95}
 96
 97static inline void __cpu_die(unsigned int cpu)
 98{
 99	loongson_cpu_die(cpu);
100}
101
102extern void play_dead(void);
103#endif
104
105#endif /* __ASM_SMP_H */