145 lines
3.9 KiB
C
145 lines
3.9 KiB
C
/*
|
|
* linux/include/asm-arm26/thread_info.h
|
|
*
|
|
* Copyright (C) 2002 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_THREAD_INFO_H
|
|
#define __ASM_ARM_THREAD_INFO_H
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
#ifndef __ASSEMBLY__
|
|
|
|
struct task_struct;
|
|
struct exec_domain;
|
|
|
|
#include <linux/compiler.h>
|
|
#include <asm/fpstate.h>
|
|
#include <asm/ptrace.h>
|
|
#include <asm/types.h>
|
|
|
|
typedef unsigned long mm_segment_t;
|
|
|
|
struct cpu_context_save {
|
|
__u32 r4;
|
|
__u32 r5;
|
|
__u32 r6;
|
|
__u32 r7;
|
|
__u32 r8;
|
|
__u32 r9;
|
|
__u32 sl;
|
|
__u32 fp;
|
|
__u32 sp;
|
|
__u32 pc;
|
|
};
|
|
|
|
/*
|
|
* low level task data that entry.S needs immediate access to.
|
|
* We assume cpu_context follows immedately after cpu_domain.
|
|
*/
|
|
struct thread_info {
|
|
unsigned long flags; /* low level flags */
|
|
int preempt_count; /* 0 => preemptable, <0 => bug */
|
|
mm_segment_t addr_limit; /* address limit */
|
|
struct task_struct *task; /* main task structure */
|
|
struct exec_domain *exec_domain; /* execution domain */
|
|
__u32 cpu; /* cpu */
|
|
struct cpu_context_save cpu_context; /* cpu context */
|
|
struct restart_block restart_block;
|
|
union fp_state fpstate;
|
|
};
|
|
|
|
#define INIT_THREAD_INFO(tsk) \
|
|
{ \
|
|
.task &tsk, \
|
|
.exec_domain &default_exec_domain, \
|
|
.flags 0, \
|
|
.preempt_count 0, \
|
|
.addr_limit KERNEL_DS, \
|
|
.restart_block = { \
|
|
.fn = do_no_restart_syscall, \
|
|
}, \
|
|
}
|
|
|
|
#define init_thread_info (init_thread_union.thread_info)
|
|
#define init_stack (init_thread_union.stack)
|
|
|
|
/*
|
|
* how to get the thread information struct from C
|
|
*/
|
|
static inline struct thread_info *current_thread_info(void) __attribute_const__;
|
|
|
|
static inline struct thread_info *current_thread_info(void)
|
|
{
|
|
register unsigned long sp asm ("sp");
|
|
return (struct thread_info *)(sp & ~0x1fff);
|
|
}
|
|
|
|
/* FIXME - PAGE_SIZE < 32K */
|
|
#define THREAD_SIZE (8*32768) // FIXME - this needs attention (see kernel/fork.c which gets a nice div by zero if this is lower than 8*32768
|
|
#define __get_user_regs(x) (((struct pt_regs *)((unsigned long)(x) + THREAD_SIZE - 8)) - 1)
|
|
|
|
extern struct thread_info *alloc_thread_info(struct task_struct *task);
|
|
extern void free_thread_info(struct thread_info *);
|
|
|
|
#define get_thread_info(ti) get_task_struct((ti)->task)
|
|
#define put_thread_info(ti) put_task_struct((ti)->task)
|
|
|
|
#define thread_saved_pc(tsk) \
|
|
((unsigned long)(pc_pointer((tsk)->thread_info->cpu_context.pc)))
|
|
#define thread_saved_fp(tsk) \
|
|
((unsigned long)((tsk)->thread_info->cpu_context.fp))
|
|
|
|
#else /* !__ASSEMBLY__ */
|
|
|
|
#define TI_FLAGS 0
|
|
#define TI_PREEMPT 4
|
|
#define TI_ADDR_LIMIT 8
|
|
#define TI_TASK 12
|
|
#define TI_EXEC_DOMAIN 16
|
|
#define TI_CPU 20
|
|
#define TI_CPU_SAVE 24
|
|
#define TI_RESTART_BLOCK 28
|
|
#define TI_FPSTATE 68
|
|
|
|
#endif
|
|
|
|
#define PREEMPT_ACTIVE 0x04000000
|
|
|
|
/*
|
|
* thread information flags:
|
|
* TIF_SYSCALL_TRACE - syscall trace active
|
|
* TIF_NOTIFY_RESUME - resumption notification requested
|
|
* TIF_SIGPENDING - signal pending
|
|
* TIF_NEED_RESCHED - rescheduling necessary
|
|
* TIF_USEDFPU - FPU was used by this task this quantum (SMP)
|
|
* TIF_POLLING_NRFLAG - true if poll_idle() is polling TIF_NEED_RESCHED
|
|
*/
|
|
#define TIF_NOTIFY_RESUME 0
|
|
#define TIF_SIGPENDING 1
|
|
#define TIF_NEED_RESCHED 2
|
|
#define TIF_SYSCALL_TRACE 8
|
|
#define TIF_USED_FPU 16
|
|
#define TIF_POLLING_NRFLAG 17
|
|
#define TIF_MEMDIE 18
|
|
|
|
#define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME)
|
|
#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
|
|
#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
|
|
#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
|
|
#define _TIF_USED_FPU (1 << TIF_USED_FPU)
|
|
#define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG)
|
|
|
|
/*
|
|
* Change these and you break ASM code in entry-common.S
|
|
*/
|
|
#define _TIF_WORK_MASK 0x000000ff
|
|
|
|
#endif /* __KERNEL__ */
|
|
#endif /* __ASM_ARM_THREAD_INFO_H */
|