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cd1aebf527
For hotplug support, we're going to want a place to store operations that do more than bring CPUs online, and it makes sense to group these with our current smp_enable_ops. For cpuidle support, we'll want to group additional functions, and we may want them even for UP kernels. This patch renames smp_enable_ops to the more general cpu_operations, and pulls the definitions out of smp code such that they can be used in UP kernels. While we're at it, fix up instances of the cpu parameter to be an unsigned int, drop the init markings and rename the *_cpu functions to cpu_* to reduce future churn when cpu_operations is extended. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
70 lines
1.9 KiB
C
70 lines
1.9 KiB
C
/*
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* Copyright (C) 2012 ARM Ltd.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __ASM_SMP_H
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#define __ASM_SMP_H
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#include <linux/threads.h>
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#include <linux/cpumask.h>
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#include <linux/thread_info.h>
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#ifndef CONFIG_SMP
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# error "<asm/smp.h> included in non-SMP build"
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#endif
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#define raw_smp_processor_id() (current_thread_info()->cpu)
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struct seq_file;
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/*
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* generate IPI list text
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*/
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extern void show_ipi_list(struct seq_file *p, int prec);
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/*
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* Called from C code, this handles an IPI.
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*/
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extern void handle_IPI(int ipinr, struct pt_regs *regs);
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/*
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* Setup the set of possible CPUs (via set_cpu_possible)
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*/
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extern void smp_init_cpus(void);
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/*
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* Provide a function to raise an IPI cross call on CPUs in callmap.
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*/
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extern void set_smp_cross_call(void (*)(const struct cpumask *, unsigned int));
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/*
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* Called from the secondary holding pen, this is the secondary CPU entry point.
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*/
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asmlinkage void secondary_start_kernel(void);
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/*
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* Initial data for bringing up a secondary CPU.
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*/
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struct secondary_data {
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void *stack;
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};
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extern struct secondary_data secondary_data;
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extern void secondary_holding_pen(void);
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extern volatile unsigned long secondary_holding_pen_release;
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extern void arch_send_call_function_single_ipi(int cpu);
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extern void arch_send_call_function_ipi_mask(const struct cpumask *mask);
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#endif /* ifndef __ASM_SMP_H */
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