1#ifndef __ASM_SH64_THREAD_INFO_H 2#define __ASM_SH64_THREAD_INFO_H 3 4/* 5 * SuperH 5 version 6 * Copyright (C) 2003 Paul Mundt 7 */ 8 9#ifdef __KERNEL__ 10 11#ifndef __ASSEMBLY__ 12#include <asm/registers.h> 13 14/* 15 * low level task data that entry.S needs immediate access to 16 * - this struct should fit entirely inside of one cache line 17 * - this struct shares the supervisor stack pages 18 * - if the contents of this structure are changed, the assembly constants must also be changed 19 */ 20struct thread_info { 21 struct task_struct *task; /* main task structure */ 22 struct exec_domain *exec_domain; /* execution domain */ 23 unsigned long flags; /* low level flags */ 24 /* Put the 4 32-bit fields together to make asm offsetting easier. */ 25 int preempt_count; /* 0 => preemptable, <0 => BUG */ 26 __u16 cpu; 27 28 mm_segment_t addr_limit; 29 struct restart_block restart_block; 30 31 __u8 supervisor_stack[0]; 32}; 33 34/* 35 * macros/functions for gaining access to the thread information structure 36 */ 37#define INIT_THREAD_INFO(tsk) \ 38{ \ 39 .task = &tsk, \ 40 .exec_domain = &default_exec_domain, \ 41 .flags = 0, \ 42 .cpu = 0, \ 43 .preempt_count = 1, \ 44 .addr_limit = KERNEL_DS, \ 45 .restart_block = { \ 46 .fn = do_no_restart_syscall, \ 47 }, \ 48} 49 50#define init_thread_info (init_thread_union.thread_info) 51#define init_stack (init_thread_union.stack) 52 53/* how to get the thread information struct from C */ 54static inline struct thread_info *current_thread_info(void) 55{ 56 struct thread_info *ti; 57 58 __asm__ __volatile__ ("getcon " __KCR0 ", %0\n\t" : "=r" (ti)); 59 60 return ti; 61} 62 63/* thread information allocation */ 64 65 66 67#define alloc_thread_info(ti) ((struct thread_info *) __get_free_pages(GFP_KERNEL,1)) 68#define free_thread_info(ti) free_pages((unsigned long) (ti), 1) 69 70#endif /* __ASSEMBLY__ */ 71 72#define THREAD_SIZE 8192 73 74#define PREEMPT_ACTIVE 0x10000000 75 76/* thread information flags */ 77#define TIF_SYSCALL_TRACE 0 /* syscall trace active */ 78#define TIF_SIGPENDING 2 /* signal pending */ 79#define TIF_NEED_RESCHED 3 /* rescheduling necessary */ 80#define TIF_MEMDIE 4 81#define TIF_RESTORE_SIGMASK 5 /* Restore signal mask in do_signal */ 82 83#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE) 84#define _TIF_SIGPENDING (1 << TIF_SIGPENDING) 85#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED) 86#define _TIF_MEMDIE (1 << TIF_MEMDIE) 87#define _TIF_RESTORE_SIGMASK (1 << TIF_RESTORE_SIGMASK) 88 89#endif /* __KERNEL__ */ 90 91#endif /* __ASM_SH64_THREAD_INFO_H */ 92