[linux-block.git] / include / asm-arm26 / processor.h

/*
 *  linux/include/asm-arm26/processor.h
 *
 *  Copyright (C) 1995 Russell King
 *  Copyright (C) 2003 Ian Molton
 *
 * 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_PROCESSOR_H
#define __ASM_ARM_PROCESSOR_H

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

#ifdef __KERNEL__

#include <asm/atomic.h>
#include <asm/ptrace.h>
#include <linux/string.h>

#define KERNEL_STACK_SIZE 4096

typedef struct {
        void (*put_byte)(void);               /* Special calling convention */
        void (*get_byte)(void);               /* Special calling convention */
        void (*put_half)(void);               /* Special calling convention */
        void (*get_half)(void);               /* Special calling convention */
        void (*put_word)(void);               /* Special calling convention */
        void (*get_word)(void);               /* Special calling convention */
        void (*put_dword)(void);              /* Special calling convention */
        unsigned long (*copy_from_user)(void *to, const void *from, unsigned long sz);
        unsigned long (*copy_to_user)(void *to, const void *from, unsigned long sz);
        unsigned long (*clear_user)(void *addr, unsigned long sz);
        unsigned long (*strncpy_from_user)(char *to, const char *from, unsigned long sz);
        unsigned long (*strnlen_user)(const char *s, long n);
} uaccess_t;

extern uaccess_t uaccess_user, uaccess_kernel;

#define EXTRA_THREAD_STRUCT                     \
        uaccess_t       *uaccess;         /* User access functions*/

#define EXTRA_THREAD_STRUCT_INIT                \
        .uaccess        = &uaccess_kernel,

// FIXME?!!

#define start_thread(regs,pc,sp)                                        \
({                                                                      \
        unsigned long *stack = (unsigned long *)sp;                     \
        set_fs(USER_DS);                                                \
        memzero(regs->uregs, sizeof (regs->uregs));                     \
        regs->ARM_pc = pc | ~0xfc000003;        /* pc */                \
        regs->ARM_sp = sp;              /* sp */                        \
        regs->ARM_r2 = stack[2];        /* r2 (envp) */                 \
        regs->ARM_r1 = stack[1];        /* r1 (argv) */                 \
        regs->ARM_r0 = stack[0];        /* r0 (argc) */                 \
})

#define KSTK_EIP(tsk)   (((unsigned long *)(4096+(unsigned long)(tsk)))[1020])
#define KSTK_ESP(tsk)   (((unsigned long *)(4096+(unsigned long)(tsk)))[1018])

struct debug_entry {
        u32                     address;
        u32		        insn;
};

struct debug_info {
        int                     nsaved;
        struct debug_entry      bp[2];
};

struct thread_struct {
							/* fault info	  */
	unsigned long			address;
	unsigned long			trap_no;
	unsigned long			error_code;
							/* debugging	  */
	struct debug_info		debug;
	EXTRA_THREAD_STRUCT
};

#define INIT_THREAD  { \
EXTRA_THREAD_STRUCT_INIT \
}

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

/* Free all resources held by a thread. */
extern void release_thread(struct task_struct *);

unsigned long get_wchan(struct task_struct *p);

#define cpu_relax()			barrier()

/* Prepare to copy thread state - unlazy all lazy status */
#define prepare_to_copy(tsk)    do { } while (0)

/*
 * Create a new kernel thread
 */
extern int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags);

#endif

#endif /* __ASM_ARM_PROCESSOR_H */
Commit	Line	Data
1da177e4 LT	1	/*
	2	* linux/include/asm-arm26/processor.h
	3	*
	4	* Copyright (C) 1995 Russell King
	5	* Copyright (C) 2003 Ian Molton
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License version 2 as
	9	* published by the Free Software Foundation.
	10	*/
	11
	12	#ifndef __ASM_ARM_PROCESSOR_H
	13	#define __ASM_ARM_PROCESSOR_H
	14
	15	/*
	16	* Default implementation of macro that returns current
	17	* instruction pointer ("program counter").
	18	*/
	19	#define current_text_addr() ({ __label__ _l; _l: &&_l;})
	20
	21	#ifdef __KERNEL__
	22
	23	#include <asm/atomic.h>
	24	#include <asm/ptrace.h>
	25	#include <linux/string.h>
	26
	27	#define KERNEL_STACK_SIZE 4096
	28
	29	typedef struct {
	30	void (put_byte)(void); / Special calling convention */
	31	void (get_byte)(void); / Special calling convention */
	32	void (put_half)(void); / Special calling convention */
	33	void (get_half)(void); / Special calling convention */
	34	void (put_word)(void); / Special calling convention */
	35	void (get_word)(void); / Special calling convention */
	36	void (put_dword)(void); / Special calling convention */
	37	unsigned long (copy_from_user)(void to, const void *from, unsigned long sz);
	38	unsigned long (copy_to_user)(void to, const void *from, unsigned long sz);
	39	unsigned long (clear_user)(void addr, unsigned long sz);
	40	unsigned long (strncpy_from_user)(char to, const char *from, unsigned long sz);
	41	unsigned long (strnlen_user)(const char s, long n);
	42	} uaccess_t;
	43
	44	extern uaccess_t uaccess_user, uaccess_kernel;
	45
	46	#define EXTRA_THREAD_STRUCT \
	47	uaccess_t uaccess; / User access functions*/
	48
	49	#define EXTRA_THREAD_STRUCT_INIT \
	50	.uaccess = &uaccess_kernel,
	51
	52	// FIXME?!!
	53
	54	#define start_thread(regs,pc,sp) \
	55	({ \
	56	unsigned long stack = (unsigned long )sp; \
	57	set_fs(USER_DS); \
	58	memzero(regs->uregs, sizeof (regs->uregs)); \
	59	regs->ARM_pc = pc \| ~0xfc000003; /* pc */ \
	60	regs->ARM_sp = sp; /* sp */ \
	61	regs->ARM_r2 = stack[2]; /* r2 (envp) */ \
	62	regs->ARM_r1 = stack[1]; /* r1 (argv) */ \
	63	regs->ARM_r0 = stack[0]; /* r0 (argc) */ \
	64	})
65
66	#define KSTK_EIP(tsk) (((unsigned long *)(4096+(unsigned long)(tsk)))[1020])
67	#define KSTK_ESP(tsk) (((unsigned long *)(4096+(unsigned long)(tsk)))[1018])
68
69	struct debug_entry {
70	u32 address;
71	u32 insn;
72	};
73
74	struct debug_info {
75	int nsaved;
76	struct debug_entry bp[2];
77	};
78
79	struct thread_struct {
80	/* fault info */
81	unsigned long address;
82	unsigned long trap_no;
83	unsigned long error_code;
84	/* debugging */
85	struct debug_info debug;
86	EXTRA_THREAD_STRUCT
87	};
88
89	#define INIT_THREAD { \
90	EXTRA_THREAD_STRUCT_INIT \
91	}
92
93	/* Forward declaration, a strange C thing */
94	struct task_struct;
95
96	/* Free all resources held by a thread. */
97	extern void release_thread(struct task_struct *);
98
99	unsigned long get_wchan(struct task_struct *p);
100
101	#define cpu_relax() barrier()
102
103	/* Prepare to copy thread state - unlazy all lazy status */
104	#define prepare_to_copy(tsk) do { } while (0)
105
106	/*
107	* Create a new kernel thread
108	*/
109	extern int kernel_thread(int (fn)(void ), void *arg, unsigned long flags);
110
111	#endif
112
113	#endif /* __ASM_ARM_PROCESSOR_H */