88 lines
2.2 KiB
C
88 lines
2.2 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. */
|
|
__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 */
|