From 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 Mon Sep 17 00:00:00 2001 From: Yunhong Jiang Date: Tue, 4 Aug 2015 12:17:53 -0700 Subject: Add the rt linux 4.1.3-rt3 as base Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang --- kernel/arch/arm/include/asm/smp.h | 126 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 126 insertions(+) create mode 100644 kernel/arch/arm/include/asm/smp.h (limited to 'kernel/arch/arm/include/asm/smp.h') diff --git a/kernel/arch/arm/include/asm/smp.h b/kernel/arch/arm/include/asm/smp.h new file mode 100644 index 000000000..18f5a5541 --- /dev/null +++ b/kernel/arch/arm/include/asm/smp.h @@ -0,0 +1,126 @@ +/* + * arch/arm/include/asm/smp.h + * + * Copyright (C) 2004-2005 ARM Ltd. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#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 assembly code, this handles an IPI. + */ +asmlinkage void do_IPI(int ipinr, struct pt_regs *regs); + +/* + * 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); + + +/* + * Provide a function to raise an IPI cross call on CPUs in callmap. + */ +extern void set_smp_cross_call(void (*)(const struct cpumask *, unsigned int)); + +/* + * Called from platform specific assembly code, this is the + * secondary CPU entry point. + */ +asmlinkage void secondary_start_kernel(void); + + +/* + * Initial data for bringing up a secondary CPU. + */ +struct secondary_data { + union { + unsigned long mpu_rgn_szr; + unsigned long pgdir; + }; + unsigned long swapper_pg_dir; + void *stack; +}; +extern struct secondary_data secondary_data; +extern volatile int pen_release; +extern void secondary_startup(void); + +extern int __cpu_disable(void); + +extern void __cpu_die(unsigned int cpu); +extern void cpu_die(void); + +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); + int (*cpu_disable)(unsigned int cpu); +#endif +#endif +}; + +struct of_cpu_method { + const char *method; + 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(struct smp_operations *); + +#endif /* ifndef __ASM_ARM_SMP_H */ -- cgit 1.2.3-korg