107 lines
2.7 KiB
C
107 lines
2.7 KiB
C
/* thread_info.h: h8300 low-level thread information
|
|
* adapted from the i386 and PPC versions by Yoshinori Sato <ysato@users.sourceforge.jp>
|
|
*
|
|
* Copyright (C) 2002 David Howells (dhowells@redhat.com)
|
|
* - Incorporating suggestions made by Linus Torvalds and Dave Miller
|
|
*/
|
|
|
|
#ifndef _ASM_THREAD_INFO_H
|
|
#define _ASM_THREAD_INFO_H
|
|
|
|
#include <asm/page.h>
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
#ifndef __ASSEMBLY__
|
|
|
|
/*
|
|
* low level task data.
|
|
* If you change this, change the TI_* offsets below to match.
|
|
*/
|
|
struct thread_info {
|
|
struct task_struct *task; /* main task structure */
|
|
struct exec_domain *exec_domain; /* execution domain */
|
|
unsigned long flags; /* low level flags */
|
|
int cpu; /* cpu we're on */
|
|
int preempt_count; /* 0 => preemptable, <0 => BUG */
|
|
struct restart_block restart_block;
|
|
};
|
|
|
|
/*
|
|
* macros/functions for gaining access to the thread information structure
|
|
*/
|
|
#define INIT_THREAD_INFO(tsk) \
|
|
{ \
|
|
.task = &tsk, \
|
|
.exec_domain = &default_exec_domain, \
|
|
.flags = 0, \
|
|
.cpu = 0, \
|
|
.preempt_count = 1, \
|
|
.restart_block = { \
|
|
.fn = do_no_restart_syscall, \
|
|
}, \
|
|
}
|
|
|
|
#define init_thread_info (init_thread_union.thread_info)
|
|
#define init_stack (init_thread_union.stack)
|
|
|
|
|
|
/*
|
|
* Size of kernel stack for each process. This must be a power of 2...
|
|
*/
|
|
#define THREAD_SIZE_ORDER 1
|
|
#define THREAD_SIZE 8192 /* 2 pages */
|
|
|
|
|
|
/* how to get the thread information struct from C */
|
|
static inline struct thread_info *current_thread_info(void)
|
|
{
|
|
struct thread_info *ti;
|
|
__asm__(
|
|
"mov.l sp, %0 \n\t"
|
|
"and.l %1, %0"
|
|
: "=&r"(ti)
|
|
: "i" (~(THREAD_SIZE-1))
|
|
);
|
|
return ti;
|
|
}
|
|
|
|
#endif /* __ASSEMBLY__ */
|
|
|
|
/*
|
|
* Offsets in thread_info structure, used in assembly code
|
|
*/
|
|
#define TI_TASK 0
|
|
#define TI_EXECDOMAIN 4
|
|
#define TI_FLAGS 8
|
|
#define TI_CPU 12
|
|
#define TI_PRE_COUNT 16
|
|
|
|
#define PREEMPT_ACTIVE 0x4000000
|
|
|
|
/*
|
|
* thread information flag bit numbers
|
|
*/
|
|
#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
|
|
#define TIF_SIGPENDING 1 /* signal pending */
|
|
#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
|
|
#define TIF_POLLING_NRFLAG 3 /* true if poll_idle() is polling
|
|
TIF_NEED_RESCHED */
|
|
#define TIF_MEMDIE 4
|
|
#define TIF_RESTORE_SIGMASK 5 /* restore signal mask in do_signal() */
|
|
#define TIF_FREEZE 16 /* is freezing for suspend */
|
|
|
|
/* as above, but as bit values */
|
|
#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
|
|
#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
|
|
#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
|
|
#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
|
|
#define _TIF_RESTORE_SIGMASK (1<<TIF_RESTORE_SIGMASK)
|
|
#define _TIF_FREEZE (1<<TIF_FREEZE)
|
|
|
|
#define _TIF_WORK_MASK 0x0000FFFE /* work to do on interrupt/exception return */
|
|
|
|
#endif /* __KERNEL__ */
|
|
|
|
#endif /* _ASM_THREAD_INFO_H */
|