[linux-2.6-block.git] / arch / riscv / include / asm / smp.h

/*
 * Copyright (C) 2012 Regents of the University of California
 *
 *   This program is free software; you can redistribute it and/or
 *   modify it under the terms of the GNU General Public License
 *   as published by the Free Software Foundation, version 2.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 */

#ifndef _ASM_RISCV_SMP_H
#define _ASM_RISCV_SMP_H

/* This both needs asm-offsets.h and is used when generating it. */
#ifndef GENERATING_ASM_OFFSETS
#include <asm/asm-offsets.h>
#endif

#include <linux/cpumask.h>
#include <linux/irqreturn.h>

#ifdef CONFIG_SMP

/* SMP initialization hook for setup_arch */
void __init init_clockevent(void);

/* SMP initialization hook for setup_arch */
void __init setup_smp(void);

/* Hook for the generic smp_call_function_many() routine. */
void arch_send_call_function_ipi_mask(struct cpumask *mask);

/* Hook for the generic smp_call_function_single() routine. */
void arch_send_call_function_single_ipi(int cpu);

/*
 * This is particularly ugly: it appears we can't actually get the definition
 * of task_struct here, but we need access to the CPU this task is running on.
 * Instead of using C we're using asm-offsets.h to get the current processor
 * ID.
 */
#define raw_smp_processor_id() (*((int*)((char*)get_current() + TASK_TI_CPU)))

/* Interprocessor interrupt handler */
irqreturn_t handle_ipi(void);

#endif /* CONFIG_SMP */

#endif /* _ASM_RISCV_SMP_H */
Commit	Line	Data
76d2a049 PD	1	/*
	2	* Copyright (C) 2012 Regents of the University of California
	3	*
	4	* This program is free software; you can redistribute it and/or
	5	* modify it under the terms of the GNU General Public License
	6	* as published by the Free Software Foundation, version 2.
	7	*
	8	* This program is distributed in the hope that it will be useful,
	9	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	10	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	11	* GNU General Public License for more details.
	12	*/
	13
	14	#ifndef _ASM_RISCV_SMP_H
	15	#define _ASM_RISCV_SMP_H
	16
	17	/* This both needs asm-offsets.h and is used when generating it. */
	18	#ifndef GENERATING_ASM_OFFSETS
	19	#include <asm/asm-offsets.h>
	20	#endif
	21
	22	#include <linux/cpumask.h>
	23	#include <linux/irqreturn.h>
	24
	25	#ifdef CONFIG_SMP
	26
	27	/* SMP initialization hook for setup_arch */
	28	void __init init_clockevent(void);
	29
	30	/* SMP initialization hook for setup_arch */
	31	void __init setup_smp(void);
	32
	33	/* Hook for the generic smp_call_function_many() routine. */
	34	void arch_send_call_function_ipi_mask(struct cpumask *mask);
	35
	36	/* Hook for the generic smp_call_function_single() routine. */
	37	void arch_send_call_function_single_ipi(int cpu);
	38
	39	/*
	40	* This is particularly ugly: it appears we can't actually get the definition
	41	* of task_struct here, but we need access to the CPU this task is running on.
	42	* Instead of using C we're using asm-offsets.h to get the current processor
	43	* ID.
	44	*/
	45	#define raw_smp_processor_id() (((int)((char*)get_current() + TASK_TI_CPU)))
	46
	47	/* Interprocessor interrupt handler */
	48	irqreturn_t handle_ipi(void);
	49
	50	#endif /* CONFIG_SMP */
	51
	52	#endif /* _ASM_RISCV_SMP_H */