[GitHub/mt8127/android_kernel_alcatel_ttab.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;

/*
 *  CPU type and hardware bug flags. Kept separately for each CPU.
 */
struct cpuinfo_frv {
#ifdef CONFIG_MMU
	unsigned long	*pgd_quick;
	unsigned long	*pte_quick;
	unsigned long	pgtable_cache_sz;
#endif
} __cacheline_aligned;

extern struct cpuinfo_frv __nongprelbss boot_cpu_data;

#define cpu_data		(&boot_cpu_data)
#define current_cpu_data	boot_cpu_data

/*
 * Bus types
 */
#define EISA_bus 0
#define MCA_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.
 * - need to discard the frame stacked by init() invoking the execve syscall
 */
#define start_thread(_regs, _pc, _usp)			\
do {							\
	__frame = __kernel_frame0_ptr;			\
	__frame->pc	= (_pc);			\
	__frame->psr	&= ~PSR_S;			\
	__frame->sp	= (_usp);			\
} while(0)

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

extern asmlinkage int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
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)

/*
 * Free current thread data structures etc..
 */
static inline void exit_thread(void)
{
}

/*
 * Return saved PC of a blocked thread.
 */
extern unsigned long thread_saved_pc(struct task_struct *tsk);

unsigned long get_wchan(struct task_struct *p);

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

/* Allocation and freeing of basic task resources. */
extern struct task_struct *alloc_task_struct_node(int node);
extern void free_task_struct(struct task_struct *p);

#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
	37	/*
	38	* CPU type and hardware bug flags. Kept separately for each CPU.
	39	*/
	40	struct cpuinfo_frv {
	41	#ifdef CONFIG_MMU
	42	unsigned long *pgd_quick;
	43	unsigned long *pte_quick;
	44	unsigned long pgtable_cache_sz;
	45	#endif
	46	} __cacheline_aligned;
	47
	48	extern struct cpuinfo_frv __nongprelbss boot_cpu_data;
	49
	50	#define cpu_data (&boot_cpu_data)
	51	#define current_cpu_data boot_cpu_data
	52
	53	/*
	54	* Bus types
	55	*/
	56	#define EISA_bus 0
	57	#define MCA_bus 0
	58
	59	struct thread_struct {
	60	struct pt_regs frame; / [GR28] exception frame ptr for this thread */
	61	struct task_struct curr; / [GR29] current pointer for this thread */
	62	unsigned long sp; /* [GR1 ] kernel stack pointer */
	63	unsigned long fp; /* [GR2 ] kernel frame pointer */
	64	unsigned long lr; /* link register */
	65	unsigned long pc; /* program counter */
	66	unsigned long gr[12]; /* [GR16-GR27] */
	67	unsigned long sched_lr; /* LR from schedule() */
	68
	69	union {
	70	struct pt_regs frame0; / top (user) stack frame */
	71	struct user_context user; / userspace context */
	72	};
	73	} __attribute__((aligned(8)));
	74
	75	extern struct pt_regs *__kernel_frame0_ptr;
	76	extern struct task_struct *__kernel_current_task;
	77
	78	#endif
	79
	80	#ifndef __ASSEMBLY__
	81	#define INIT_THREAD_FRAME0 \
	82	((struct pt_regs *) \
	83	(sizeof(init_stack) + (unsigned long) init_stack - sizeof(struct user_context)))
	84
	85	#define INIT_THREAD { \
	86	NULL, \
	87	(struct task_struct *) init_stack, \
	88	0, 0, 0, 0, \
89	{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, \
90	0, \
91	{ INIT_THREAD_FRAME0 }, \
92	}
93
94	/*
95	* do necessary setup to start up a newly executed thread.
96	* - need to discard the frame stacked by init() invoking the execve syscall
97	*/
98	#define start_thread(_regs, _pc, _usp) \
99	do { \
1da177e4 LT	100	__frame = __kernel_frame0_ptr; \
	101	__frame->pc = (_pc); \
	102	__frame->psr &= ~PSR_S; \
	103	__frame->sp = (_usp); \
	104	} while(0)
	105
1da177e4 LT	106	/* Free all resources held by a thread. */
	107	static inline void release_thread(struct task_struct *dead_task)
	108	{
	109	}
	110
	111	extern asmlinkage int kernel_thread(int (fn)(void ), void * arg, unsigned long flags);
	112	extern asmlinkage void save_user_regs(struct user_context *target);
	113	extern asmlinkage void restore_user_regs(const struct user_context target, ...);
	114
	115	#define copy_segments(tsk, mm) do { } while (0)
	116	#define release_segments(mm) do { } while (0)
	117	#define forget_segments() do { } while (0)
	118
	119	/*
	120	* Free current thread data structures etc..
	121	*/
	122	static inline void exit_thread(void)
	123	{
	124	}
	125
	126	/*
	127	* Return saved PC of a blocked thread.
	128	*/
	129	extern unsigned long thread_saved_pc(struct task_struct *tsk);
	130
	131	unsigned long get_wchan(struct task_struct *p);
	132
	133	#define KSTK_EIP(tsk) ((tsk)->thread.frame0->pc)
	134	#define KSTK_ESP(tsk) ((tsk)->thread.frame0->sp)
	135
	136	/* Allocation and freeing of basic task resources. */
504f52b5	137	extern struct task_struct *alloc_task_struct_node(int node);
1da177e4 LT	138	extern void free_task_struct(struct task_struct *p);
1da177e4 LT	139
f6dc8c5b	140	#define cpu_relax() barrier()
1da177e4 LT	141
	142	/* data cache prefetch */
	143	#define ARCH_HAS_PREFETCH
	144	static inline void prefetch(const void *x)
	145	{
	146	asm volatile("dcpl %0,gr0,#0" : : "r"(x));
	147	}
	148
	149	#endif /* __ASSEMBLY__ */
	150	#endif /* _ASM_PROCESSOR_H */