linux/include/asm-sh64/thread_info.h
Paul Mundt c18fe9a046 sh64: ppoll/pselect6() and restartable syscalls.
This patch was hanging around for some time while we were waiting
for the compiler situation to improve.. now that all is well again,
finally merge it.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-05-14 09:12:39 +09:00

92 lines
2.4 KiB
C

#ifndef __ASM_SH64_THREAD_INFO_H
#define __ASM_SH64_THREAD_INFO_H
/*
* SuperH 5 version
* Copyright (C) 2003 Paul Mundt
*/
#ifdef __KERNEL__
#ifndef __ASSEMBLY__
#include <asm/registers.h>
/*
* low level task data that entry.S needs immediate access to
* - this struct should fit entirely inside of one cache line
* - this struct shares the supervisor stack pages
* - if the contents of this structure are changed, the assembly constants must also be changed
*/
struct thread_info {
struct task_struct *task; /* main task structure */
struct exec_domain *exec_domain; /* execution domain */
unsigned long flags; /* low level flags */
/* Put the 4 32-bit fields together to make asm offsetting easier. */
int preempt_count; /* 0 => preemptable, <0 => BUG */
__u16 cpu;
mm_segment_t addr_limit;
struct restart_block restart_block;
__u8 supervisor_stack[0];
};
/*
* 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, \
.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)
{
struct thread_info *ti;
__asm__ __volatile__ ("getcon " __KCR0 ", %0\n\t" : "=r" (ti));
return ti;
}
/* thread information allocation */
#define alloc_thread_info(ti) ((struct thread_info *) __get_free_pages(GFP_KERNEL,1))
#define free_thread_info(ti) free_pages((unsigned long) (ti), 1)
#endif /* __ASSEMBLY__ */
#define THREAD_SIZE 8192
#define PREEMPT_ACTIVE 0x10000000
/* thread information flags */
#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
#define TIF_SIGPENDING 2 /* signal pending */
#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
#define TIF_MEMDIE 4
#define TIF_RESTORE_SIGMASK 5 /* Restore signal mask in do_signal */
#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
#define _TIF_MEMDIE (1 << TIF_MEMDIE)
#define _TIF_RESTORE_SIGMASK (1 << TIF_RESTORE_SIGMASK)
#endif /* __KERNEL__ */
#endif /* __ASM_SH64_THREAD_INFO_H */