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2 * Port on Texas Instruments TMS320C6x architecture
4 * Copyright (C) 2004, 2009, 2010, 2011 Texas Instruments Incorporated
5 * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com)
7 * Updated for 2.6.3x: Mark Salter <msalter@redhat.com>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
13 #ifndef _ASM_C6X_THREAD_INFO_H
14 #define _ASM_C6X_THREAD_INFO_H
20 #ifdef CONFIG_4KSTACKS
21 #define THREAD_SIZE 4096
22 #define THREAD_SHIFT 12
23 #define THREAD_SIZE_ORDER 0
25 #define THREAD_SIZE 8192
26 #define THREAD_SHIFT 13
27 #define THREAD_SIZE_ORDER 1
30 #define THREAD_START_SP (THREAD_SIZE - 8)
39 * low level task data.
42 struct task_struct
*task
; /* main task structure */
43 struct exec_domain
*exec_domain
; /* execution domain */
44 unsigned long flags
; /* low level flags */
45 int cpu
; /* cpu we're on */
46 int preempt_count
; /* 0 = preemptable, <0 = BUG */
47 mm_segment_t addr_limit
; /* thread address space */
51 * macros/functions for gaining access to the thread information structure
53 * preempt_count needs to be 1 initially, until the scheduler is functional.
55 #define INIT_THREAD_INFO(tsk) \
58 .exec_domain = &default_exec_domain, \
61 .preempt_count = INIT_PREEMPT_COUNT, \
62 .addr_limit = KERNEL_DS, \
65 #define init_thread_info (init_thread_union.thread_info)
66 #define init_stack (init_thread_union.stack)
68 /* get the thread information struct of current task */
69 static inline __attribute__((const))
70 struct thread_info
*current_thread_info(void)
72 struct thread_info
*ti
;
73 asm volatile (" clr .s2 B15,0,%1,%0\n"
75 : "Iu5" (THREAD_SHIFT
- 1));
79 #define get_thread_info(ti) get_task_struct((ti)->task)
80 #define put_thread_info(ti) put_task_struct((ti)->task)
81 #endif /* __ASSEMBLY__ */
84 * thread information flag bit numbers
85 * - pending work-to-be-done flags are in LSW
86 * - other flags in MSW
88 #define TIF_SYSCALL_TRACE 0 /* syscall trace active */
89 #define TIF_NOTIFY_RESUME 1 /* resumption notification requested */
90 #define TIF_SIGPENDING 2 /* signal pending */
91 #define TIF_NEED_RESCHED 3 /* rescheduling necessary */
92 #define TIF_RESTORE_SIGMASK 4 /* restore signal mask in do_signal() */
94 #define TIF_MEMDIE 17 /* OOM killer killed process */
96 #define TIF_WORK_MASK 0x00007FFE /* work on irq/exception return */
97 #define TIF_ALLWORK_MASK 0x00007FFF /* work on any return to u-space */
99 #endif /* __KERNEL__ */
101 #endif /* _ASM_C6X_THREAD_INFO_H */