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/*
* include/asm-arm/processor.h
*
* Copyright (C) 1995 Russell King
*/
#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;})
#define FP_SIZE 35
struct fp_hard_struct {
unsigned int save[FP_SIZE]; /* as yet undefined */
};
struct fp_soft_struct {
unsigned int save[FP_SIZE]; /* undefined information */
};
union fp_state {
struct fp_hard_struct hard;
struct fp_soft_struct soft;
};
typedef unsigned long mm_segment_t; /* domain register */
#ifdef __KERNEL__
#define NR_DEBUGS 5
#include <asm/atomic.h>
#include <asm/ptrace.h>
#include <asm/arch/memory.h>
#include <asm/arch/processor.h>
#include <asm/proc/processor.h>
struct debug_info {
int nsaved;
struct {
unsigned long address;
unsigned long insn;
} bp[2];
};
struct thread_struct {
atomic_t refcount;
/* fault info */
unsigned long address;
unsigned long trap_no;
unsigned long error_code;
/* floating point */
union fp_state fpstate;
/* debugging */
struct debug_info debug;
/* context info */
struct context_save_struct *save;
EXTRA_THREAD_STRUCT
};
#define INIT_MMAP \
{ &init_mm, 0, 0, NULL, PAGE_SHARED, VM_READ | VM_WRITE | VM_EXEC, 1, NULL, NULL }
#define INIT_THREAD { \
ATOMIC_INIT(1), \
0, \
0, \
0, \
{ { { 0, }, }, }, \
{ 0, }, \
(struct context_save_struct *)0 \
EXTRA_THREAD_STRUCT_INIT \
}
/*
* Return saved PC of a blocked thread.
*/
extern __inline__ unsigned long thread_saved_pc(struct thread_struct *t)
{
return t->save ? pc_pointer(t->save->pc) : 0;
}
extern __inline__ unsigned long get_css_fp(struct thread_struct *t)
{
return t->save ? t->save->fp : 0;
}
asmlinkage void ret_from_sys_call(void) __asm__("ret_from_sys_call");
extern __inline__ void init_thread_css(struct context_save_struct *save)
{
*save = INIT_CSS;
save->pc |= (unsigned long)ret_from_sys_call;
}
/* Forward declaration, a strange C thing */
struct task_struct;
struct mm_struct;
/* Free all resources held by a thread. */
extern void release_thread(struct task_struct *);
/* Copy and release all segment info associated with a VM */
#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 THREAD_SIZE (8192)
extern struct task_struct *alloc_task_struct(void);
extern void __free_task_struct(struct task_struct *);
#define get_task_struct(p) atomic_inc(&(p)->thread.refcount)
#define free_task_struct(p) \
do { \
if (atomic_dec_and_test(&(p)->thread.refcount)) \
__free_task_struct((p)); \
} while (0)
#define init_task (init_task_union.task)
#define init_stack (init_task_union.stack)
/*
* Create a new kernel thread
*/
extern int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags);
#endif
#endif /* __ASM_ARM_PROCESSOR_H */
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