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 */
48 struct restart_block restart_block
;
52 * macros/functions for gaining access to the thread information structure
54 * preempt_count needs to be 1 initially, until the scheduler is functional.
56 #define INIT_THREAD_INFO(tsk) \
59 .exec_domain = &default_exec_domain, \
62 .preempt_count = INIT_PREEMPT_COUNT, \
63 .addr_limit = KERNEL_DS, \
65 .fn = do_no_restart_syscall, \
69 #define init_thread_info (init_thread_union.thread_info)
70 #define init_stack (init_thread_union.stack)
72 /* get the thread information struct of current task */
73 static inline __attribute__((const))
74 struct thread_info
*current_thread_info(void)
76 struct thread_info
*ti
;
77 asm volatile (" clr .s2 B15,0,%1,%0\n"
79 : "Iu5" (THREAD_SHIFT
- 1));
83 #define get_thread_info(ti) get_task_struct((ti)->task)
84 #define put_thread_info(ti) put_task_struct((ti)->task)
85 #endif /* __ASSEMBLY__ */
88 * thread information flag bit numbers
89 * - pending work-to-be-done flags are in LSW
90 * - other flags in MSW
92 #define TIF_SYSCALL_TRACE 0 /* syscall trace active */
93 #define TIF_NOTIFY_RESUME 1 /* resumption notification requested */
94 #define TIF_SIGPENDING 2 /* signal pending */
95 #define TIF_NEED_RESCHED 3 /* rescheduling necessary */
96 #define TIF_RESTORE_SIGMASK 4 /* restore signal mask in do_signal() */
98 #define TIF_MEMDIE 17 /* OOM killer killed process */
100 #define TIF_WORK_MASK 0x00007FFE /* work on irq/exception return */
101 #define TIF_ALLWORK_MASK 0x00007FFF /* work on any return to u-space */
103 #endif /* __KERNEL__ */
105 #endif /* _ASM_C6X_THREAD_INFO_H */