From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:49:45 +0200 Subject: Adding upstream version 6.1.76. Signed-off-by: Daniel Baumann --- arch/arm/include/asm/smp.h | 118 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 118 insertions(+) create mode 100644 arch/arm/include/asm/smp.h (limited to 'arch/arm/include/asm/smp.h') diff --git a/arch/arm/include/asm/smp.h b/arch/arm/include/asm/smp.h new file mode 100644 index 000000000..7c1c90d9f --- /dev/null +++ b/arch/arm/include/asm/smp.h @@ -0,0 +1,118 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * arch/arm/include/asm/smp.h + * + * Copyright (C) 2004-2005 ARM Ltd. + */ +#ifndef __ASM_ARM_SMP_H +#define __ASM_ARM_SMP_H + +#include +#include +#include + +#ifndef CONFIG_SMP +# error " included in non-SMP build" +#endif + +#define raw_smp_processor_id() (current_thread_info()->cpu) + +struct seq_file; + +/* + * generate IPI list text + */ +extern void show_ipi_list(struct seq_file *, int); + +/* + * Called from C code, this handles an IPI. + */ +void handle_IPI(int ipinr, struct pt_regs *regs); + +/* + * Setup the set of possible CPUs (via set_cpu_possible) + */ +extern void smp_init_cpus(void); + +/* + * Register IPI interrupts with the arch SMP code + */ +extern void set_smp_ipi_range(int ipi_base, int nr_ipi); + +/* + * Called from platform specific assembly code, this is the + * secondary CPU entry point. + */ +asmlinkage void secondary_start_kernel(struct task_struct *task); + + +/* + * Initial data for bringing up a secondary CPU. + */ +struct secondary_data { + union { + struct mpu_rgn_info *mpu_rgn_info; + u64 pgdir; + }; + unsigned long swapper_pg_dir; + void *stack; + struct task_struct *task; +}; +extern struct secondary_data secondary_data; +extern void secondary_startup(void); +extern void secondary_startup_arm(void); + +extern int __cpu_disable(void); + +extern void __cpu_die(unsigned int cpu); + +extern void arch_send_call_function_single_ipi(int cpu); +extern void arch_send_call_function_ipi_mask(const struct cpumask *mask); +extern void arch_send_wakeup_ipi_mask(const struct cpumask *mask); + +extern int register_ipi_completion(struct completion *completion, int cpu); + +struct smp_operations { +#ifdef CONFIG_SMP + /* + * Setup the set of possible CPUs (via set_cpu_possible) + */ + void (*smp_init_cpus)(void); + /* + * Initialize cpu_possible map, and enable coherency + */ + void (*smp_prepare_cpus)(unsigned int max_cpus); + + /* + * Perform platform specific initialisation of the specified CPU. + */ + void (*smp_secondary_init)(unsigned int cpu); + /* + * Boot a secondary CPU, and assign it the specified idle task. + * This also gives us the initial stack to use for this CPU. + */ + int (*smp_boot_secondary)(unsigned int cpu, struct task_struct *idle); +#ifdef CONFIG_HOTPLUG_CPU + int (*cpu_kill)(unsigned int cpu); + void (*cpu_die)(unsigned int cpu); + bool (*cpu_can_disable)(unsigned int cpu); + int (*cpu_disable)(unsigned int cpu); +#endif +#endif +}; + +struct of_cpu_method { + const char *method; + const struct smp_operations *ops; +}; + +#define CPU_METHOD_OF_DECLARE(name, _method, _ops) \ + static const struct of_cpu_method __cpu_method_of_table_##name \ + __used __section("__cpu_method_of_table") \ + = { .method = _method, .ops = _ops } +/* + * set platform specific SMP operations + */ +extern void smp_set_ops(const struct smp_operations *); + +#endif /* ifndef __ASM_ARM_SMP_H */ -- cgit v1.2.3