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#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. */
__s32 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)
#define get_thread_info(ti) get_task_struct((ti)->task)
#define put_thread_info(ti) put_task_struct((ti)->task)
#endif /* __ASSEMBLY__ */
#define THREAD_SIZE 8192
#define PREEMPT_ACTIVE 0x4000000
/* 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
#endif /* __KERNEL__ */
#endif /* __ASM_SH64_THREAD_INFO_H */
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