You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
129 lines
3.7 KiB
129 lines
3.7 KiB
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _ASM_M32R_THREAD_INFO_H
|
|
#define _ASM_M32R_THREAD_INFO_H
|
|
|
|
/* thread_info.h: m32r low-level thread information
|
|
*
|
|
* Copyright (C) 2002 David Howells (dhowells@redhat.com)
|
|
* - Incorporating suggestions made by Linus Torvalds and Dave Miller
|
|
* Copyright (C) 2004 Hirokazu Takata <takata at linux-m32r.org>
|
|
*/
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
#ifndef __ASSEMBLY__
|
|
#include <asm/processor.h>
|
|
#endif
|
|
|
|
/*
|
|
* 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
|
|
*/
|
|
#ifndef __ASSEMBLY__
|
|
|
|
struct thread_info {
|
|
struct task_struct *task; /* main task structure */
|
|
unsigned long flags; /* low level flags */
|
|
unsigned long status; /* thread-synchronous flags */
|
|
__u32 cpu; /* current CPU */
|
|
int preempt_count; /* 0 => preemptable, <0 => BUG */
|
|
|
|
mm_segment_t addr_limit; /* thread address space:
|
|
0-0xBFFFFFFF for user-thread
|
|
0-0xFFFFFFFF for kernel-thread
|
|
*/
|
|
|
|
__u8 supervisor_stack[0];
|
|
};
|
|
|
|
#endif /* !__ASSEMBLY__ */
|
|
|
|
#define THREAD_SIZE (PAGE_SIZE << 1)
|
|
#define THREAD_SIZE_ORDER 1
|
|
/*
|
|
* macros/functions for gaining access to the thread information structure
|
|
*/
|
|
#ifndef __ASSEMBLY__
|
|
|
|
#define INIT_THREAD_INFO(tsk) \
|
|
{ \
|
|
.task = &tsk, \
|
|
.flags = 0, \
|
|
.cpu = 0, \
|
|
.preempt_count = INIT_PREEMPT_COUNT, \
|
|
.addr_limit = KERNEL_DS, \
|
|
}
|
|
|
|
#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__ (
|
|
"ldi %0, #%1 \n\t"
|
|
"and %0, sp \n\t"
|
|
: "=r" (ti) : "i" (~(THREAD_SIZE - 1))
|
|
);
|
|
|
|
return ti;
|
|
}
|
|
|
|
#define TI_FLAG_FAULT_CODE_SHIFT 28
|
|
|
|
static inline void set_thread_fault_code(unsigned int val)
|
|
{
|
|
struct thread_info *ti = current_thread_info();
|
|
ti->flags = (ti->flags & (~0 >> (32 - TI_FLAG_FAULT_CODE_SHIFT)))
|
|
| (val << TI_FLAG_FAULT_CODE_SHIFT);
|
|
}
|
|
|
|
static inline unsigned int get_thread_fault_code(void)
|
|
{
|
|
struct thread_info *ti = current_thread_info();
|
|
return ti->flags >> TI_FLAG_FAULT_CODE_SHIFT;
|
|
}
|
|
|
|
#endif
|
|
|
|
/*
|
|
* thread information flags
|
|
* - these are process state flags that various assembly files may need to access
|
|
* - pending work-to-be-done flags are in LSW
|
|
* - other flags in MSW
|
|
*/
|
|
#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
|
|
#define TIF_SIGPENDING 1 /* signal pending */
|
|
#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
|
|
#define TIF_SINGLESTEP 3 /* restore singlestep on return to user mode */
|
|
#define TIF_NOTIFY_RESUME 5 /* callback before returning to user */
|
|
#define TIF_RESTORE_SIGMASK 8 /* restore signal mask in do_signal() */
|
|
#define TIF_USEDFPU 16 /* FPU was used by this task this quantum (SMP) */
|
|
#define TIF_MEMDIE 18 /* is terminating due to OOM killer */
|
|
|
|
#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
|
|
#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
|
|
#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
|
|
#define _TIF_SINGLESTEP (1<<TIF_SINGLESTEP)
|
|
#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
|
|
#define _TIF_USEDFPU (1<<TIF_USEDFPU)
|
|
|
|
#define _TIF_WORK_MASK (_TIF_SIGPENDING | _TIF_NEED_RESCHED | _TIF_NOTIFY_RESUME)
|
|
#define _TIF_ALLWORK_MASK (_TIF_WORK_MASK | _TIF_SYSCALL_TRACE)
|
|
|
|
/*
|
|
* Thread-synchronous status.
|
|
*
|
|
* This is different from the flags in that nobody else
|
|
* ever touches our thread-synchronous status, so we don't
|
|
* have to worry about atomic accesses.
|
|
*/
|
|
#define TS_USEDFPU 0x0001 /* FPU was used by this task this quantum (SMP) */
|
|
|
|
#endif /* __KERNEL__ */
|
|
|
|
#endif /* _ASM_M32R_THREAD_INFO_H */
|
|
|