[mirror_ubuntu-artful-kernel.git] / arch / frv / include / asm / processor.h

/* processor.h: FRV processor definitions
 *
 * Copyright (C) 2003 Red Hat, Inc. All Rights Reserved.
 * Written by David Howells (dhowells@redhat.com)
 *
 * 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; either version
 * 2 of the License, or (at your option) any later version.
 */

#ifndef _ASM_PROCESSOR_H
#define _ASM_PROCESSOR_H

#include <asm/mem-layout.h>

#ifndef __ASSEMBLY__
/*
 * Default implementation of macro that returns current
 * instruction pointer ("program counter").
 */
#define current_text_addr() ({ __label__ _l; _l: &&_l;})

#include <linux/compiler.h>
#include <linux/linkage.h>
#include <asm/sections.h>
#include <asm/segment.h>
#include <asm/fpu.h>
#include <asm/registers.h>
#include <asm/ptrace.h>
#include <asm/current.h>
#include <asm/cache.h>

/* Forward declaration, a strange C thing */
struct task_struct;

/*
 * Bus types
 */
#define EISA_bus 0

struct thread_struct {
	struct pt_regs		*frame;		/* [GR28] exception frame ptr for this thread */
	struct task_struct	*curr;		/* [GR29] current pointer for this thread */
	unsigned long		sp;		/* [GR1 ] kernel stack pointer */
	unsigned long		fp;		/* [GR2 ] kernel frame pointer */
	unsigned long		lr;		/* link register */
	unsigned long		pc;		/* program counter */
	unsigned long		gr[12];		/* [GR16-GR27] */
	unsigned long		sched_lr;	/* LR from schedule() */

	union {
		struct pt_regs		*frame0;	/* top (user) stack frame */
		struct user_context	*user;		/* userspace context */
	};
} __attribute__((aligned(8)));

extern struct pt_regs *__kernel_frame0_ptr;
extern struct task_struct *__kernel_current_task;

#endif

#ifndef __ASSEMBLY__
#define INIT_THREAD_FRAME0 \
	((struct pt_regs *) \
	(sizeof(init_stack) + (unsigned long) init_stack - sizeof(struct user_context)))

#define INIT_THREAD {				\
	NULL,					\
	(struct task_struct *) init_stack,	\
	0, 0, 0, 0,				\
	{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },	\
	0,					\
	{ INIT_THREAD_FRAME0 },			\
}

/*
 * do necessary setup to start up a newly executed thread.
 */
#define start_thread(_regs, _pc, _usp)			\
do {							\
	_regs->pc	= (_pc);			\
	_regs->psr	&= ~PSR_S;			\
	_regs->sp	= (_usp);			\
} while(0)

/* Free all resources held by a thread. */
static inline void release_thread(struct task_struct *dead_task)
{
}

extern asmlinkage void save_user_regs(struct user_context *target);
extern asmlinkage void *restore_user_regs(const struct user_context *target, ...);

#define copy_segments(tsk, mm)		do { } while (0)
#define release_segments(mm)		do { } while (0)
#define forget_segments()		do { } while (0)

unsigned long get_wchan(struct task_struct *p);

#define	KSTK_EIP(tsk)	((tsk)->thread.frame0->pc)
#define	KSTK_ESP(tsk)	((tsk)->thread.frame0->sp)

#define cpu_relax() barrier()

/* data cache prefetch */
#define ARCH_HAS_PREFETCH
static inline void prefetch(const void *x)
{
	asm volatile("dcpl %0,gr0,#0" : : "r"(x));
}

#endif /* __ASSEMBLY__ */
#endif /* _ASM_PROCESSOR_H */
Commit	Line	Data
1da177e4 LT	1	/* processor.h: FRV processor definitions
	2	*
	3	* Copyright (C) 2003 Red Hat, Inc. All Rights Reserved.
	4	* Written by David Howells (dhowells@redhat.com)
	5	*
	6	* This program is free software; you can redistribute it and/or
	7	* modify it under the terms of the GNU General Public License
	8	* as published by the Free Software Foundation; either version
	9	* 2 of the License, or (at your option) any later version.
	10	*/
	11
	12	#ifndef _ASM_PROCESSOR_H
	13	#define _ASM_PROCESSOR_H
	14
1da177e4 LT	15	#include <asm/mem-layout.h>
	16
	17	#ifndef __ASSEMBLY__
	18	/*
	19	* Default implementation of macro that returns current
	20	* instruction pointer ("program counter").
	21	*/
	22	#define current_text_addr() ({ __label__ _l; _l: &&_l;})
	23
f6dc8c5b	24	#include <linux/compiler.h>
1da177e4 LT	25	#include <linux/linkage.h>
	26	#include <asm/sections.h>
	27	#include <asm/segment.h>
	28	#include <asm/fpu.h>
	29	#include <asm/registers.h>
	30	#include <asm/ptrace.h>
	31	#include <asm/current.h>
	32	#include <asm/cache.h>
	33
	34	/* Forward declaration, a strange C thing */
	35	struct task_struct;
	36
1da177e4 LT	37	/*
	38	* Bus types
	39	*/
	40	#define EISA_bus 0
1da177e4 LT	41
	42	struct thread_struct {
	43	struct pt_regs frame; / [GR28] exception frame ptr for this thread */
	44	struct task_struct curr; / [GR29] current pointer for this thread */
	45	unsigned long sp; /* [GR1 ] kernel stack pointer */
	46	unsigned long fp; /* [GR2 ] kernel frame pointer */
	47	unsigned long lr; /* link register */
	48	unsigned long pc; /* program counter */
	49	unsigned long gr[12]; /* [GR16-GR27] */
	50	unsigned long sched_lr; /* LR from schedule() */
	51
	52	union {
	53	struct pt_regs frame0; / top (user) stack frame */
	54	struct user_context user; / userspace context */
	55	};
	56	} __attribute__((aligned(8)));
	57
	58	extern struct pt_regs *__kernel_frame0_ptr;
	59	extern struct task_struct *__kernel_current_task;
	60
	61	#endif
	62
	63	#ifndef __ASSEMBLY__
	64	#define INIT_THREAD_FRAME0 \
	65	((struct pt_regs *) \
	66	(sizeof(init_stack) + (unsigned long) init_stack - sizeof(struct user_context)))
	67
	68	#define INIT_THREAD { \
	69	NULL, \
	70	(struct task_struct *) init_stack, \
	71	0, 0, 0, 0, \
	72	{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, \
	73	0, \
	74	{ INIT_THREAD_FRAME0 }, \
	75	}
	76
	77	/*
	78	* do necessary setup to start up a newly executed thread.
1da177e4 LT	79	*/
	80	#define start_thread(_regs, _pc, _usp) \
	81	do { \
019f96a3 AV	82	_regs->pc = (_pc); \
	83	_regs->psr &= ~PSR_S; \
	84	_regs->sp = (_usp); \
1da177e4 LT	85	} while(0)
1da177e4 LT	86
1da177e4 LT	87	/* Free all resources held by a thread. */
	88	static inline void release_thread(struct task_struct *dead_task)
	89	{
	90	}
	91
1da177e4 LT	92	extern asmlinkage void save_user_regs(struct user_context *target);
	93	extern asmlinkage void restore_user_regs(const struct user_context target, ...);
	94
	95	#define copy_segments(tsk, mm) do { } while (0)
	96	#define release_segments(mm) do { } while (0)
	97	#define forget_segments() do { } while (0)
	98
1da177e4 LT	99	unsigned long get_wchan(struct task_struct *p);
	100
	101	#define KSTK_EIP(tsk) ((tsk)->thread.frame0->pc)
	102	#define KSTK_ESP(tsk) ((tsk)->thread.frame0->sp)
	103
f325f164	104	#define cpu_relax() barrier()
1da177e4 LT	105
	106	/* data cache prefetch */
	107	#define ARCH_HAS_PREFETCH
	108	static inline void prefetch(const void *x)
	109	{
	110	asm volatile("dcpl %0,gr0,#0" : : "r"(x));
	111	}
	112
	113	#endif /* __ASSEMBLY__ */
	114	#endif /* _ASM_PROCESSOR_H */