mirror of
https://github.com/torvalds/linux.git
synced 2024-12-19 09:32:32 +00:00
100 lines
2.6 KiB
C
100 lines
2.6 KiB
C
/*
|
|
* Port on Texas Instruments TMS320C6x architecture
|
|
*
|
|
* Copyright (C) 2004, 2009, 2010, 2011 Texas Instruments Incorporated
|
|
* Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com)
|
|
*
|
|
* Updated for 2.6.3x: Mark Salter <msalter@redhat.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
#ifndef _ASM_C6X_THREAD_INFO_H
|
|
#define _ASM_C6X_THREAD_INFO_H
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
#include <asm/page.h>
|
|
|
|
#ifdef CONFIG_4KSTACKS
|
|
#define THREAD_SIZE 4096
|
|
#define THREAD_SHIFT 12
|
|
#define THREAD_SIZE_ORDER 0
|
|
#else
|
|
#define THREAD_SIZE 8192
|
|
#define THREAD_SHIFT 13
|
|
#define THREAD_SIZE_ORDER 1
|
|
#endif
|
|
|
|
#define THREAD_START_SP (THREAD_SIZE - 8)
|
|
|
|
#ifndef __ASSEMBLY__
|
|
|
|
typedef struct {
|
|
unsigned long seg;
|
|
} mm_segment_t;
|
|
|
|
/*
|
|
* low level task data.
|
|
*/
|
|
struct thread_info {
|
|
struct task_struct *task; /* main task structure */
|
|
unsigned long flags; /* low level flags */
|
|
int cpu; /* cpu we're on */
|
|
int preempt_count; /* 0 = preemptable, <0 = BUG */
|
|
mm_segment_t addr_limit; /* thread address space */
|
|
};
|
|
|
|
/*
|
|
* macros/functions for gaining access to the thread information structure
|
|
*
|
|
* preempt_count needs to be 1 initially, until the scheduler is functional.
|
|
*/
|
|
#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)
|
|
|
|
/* get the thread information struct of current task */
|
|
static inline __attribute__((const))
|
|
struct thread_info *current_thread_info(void)
|
|
{
|
|
struct thread_info *ti;
|
|
asm volatile (" clr .s2 B15,0,%1,%0\n"
|
|
: "=b" (ti)
|
|
: "Iu5" (THREAD_SHIFT - 1));
|
|
return ti;
|
|
}
|
|
|
|
#define get_thread_info(ti) get_task_struct((ti)->task)
|
|
#define put_thread_info(ti) put_task_struct((ti)->task)
|
|
#endif /* __ASSEMBLY__ */
|
|
|
|
/*
|
|
* thread information flag bit numbers
|
|
* - pending work-to-be-done flags are in LSW
|
|
* - other flags in MSW
|
|
*/
|
|
#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
|
|
#define TIF_NOTIFY_RESUME 1 /* resumption notification requested */
|
|
#define TIF_SIGPENDING 2 /* signal pending */
|
|
#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
|
|
#define TIF_RESTORE_SIGMASK 4 /* restore signal mask in do_signal() */
|
|
|
|
#define TIF_MEMDIE 17 /* OOM killer killed process */
|
|
|
|
#define TIF_WORK_MASK 0x00007FFE /* work on irq/exception return */
|
|
#define TIF_ALLWORK_MASK 0x00007FFF /* work on any return to u-space */
|
|
|
|
#endif /* __KERNEL__ */
|
|
|
|
#endif /* _ASM_C6X_THREAD_INFO_H */
|