1#ifndef _ASM_SCORE_THREAD_INFO_H 2#define _ASM_SCORE_THREAD_INFO_H 3 4#ifdef __KERNEL__ 5 6#define KU_MASK 0x08 7#define KU_USER 0x08 8#define KU_KERN 0x00 9 10#include <asm/page.h> 11#include <linux/const.h> 12 13/* thread information allocation */ 14#define THREAD_SIZE_ORDER (1) 15#define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER) 16#define THREAD_MASK (THREAD_SIZE - _AC(1,UL)) 17#define __HAVE_ARCH_THREAD_INFO_ALLOCATOR 18 19#ifndef __ASSEMBLY__ 20 21#include <asm/processor.h> 22 23/* 24 * low level task data that entry.S needs immediate access to 25 * - this struct should fit entirely inside of one cache line 26 * - this struct shares the supervisor stack pages 27 * - if the contents of this structure are changed, the assembly constants 28 * must also be changed 29 */ 30struct thread_info { 31 struct task_struct *task; /* main task structure */ 32 struct exec_domain *exec_domain; /* execution domain */ 33 unsigned long flags; /* low level flags */ 34 unsigned long tp_value; /* thread pointer */ 35 __u32 cpu; /* current CPU */ 36 37 /* 0 => preemptable, < 0 => BUG */ 38 int preempt_count; 39 40 /* 41 * thread address space: 42 * 0-0xBFFFFFFF for user-thead 43 * 0-0xFFFFFFFF for kernel-thread 44 */ 45 mm_segment_t addr_limit; 46 struct restart_block restart_block; 47 struct pt_regs *regs; 48}; 49 50/* 51 * macros/functions for gaining access to the thread information structure 52 * 53 * preempt_count needs to be 1 initially, until the scheduler is functional. 54 */ 55#define INIT_THREAD_INFO(tsk) \ 56{ \ 57 .task = &tsk, \ 58 .exec_domain = &default_exec_domain, \ 59 .cpu = 0, \ 60 .preempt_count = 1, \ 61 .addr_limit = KERNEL_DS, \ 62 .restart_block = { \ 63 .fn = do_no_restart_syscall, \ 64 }, \ 65} 66 67#define init_thread_info (init_thread_union.thread_info) 68#define init_stack (init_thread_union.stack) 69 70/* How to get the thread information struct from C. */ 71register struct thread_info *__current_thread_info __asm__("r28"); 72#define current_thread_info() __current_thread_info 73 74#define alloc_thread_info(tsk) kmalloc(THREAD_SIZE, GFP_KERNEL) 75#define free_thread_info(info) kfree(info) 76 77#endif /* !__ASSEMBLY__ */ 78 79#define PREEMPT_ACTIVE 0x10000000 80 81/* 82 * thread information flags 83 * - these are process state flags that various assembly files may need to 84 * access 85 * - pending work-to-be-done flags are in LSW 86 * - other flags in MSW 87 */ 88#define TIF_SYSCALL_TRACE 0 /* syscall trace active */ 89#define TIF_SIGPENDING 1 /* signal pending */ 90#define TIF_NEED_RESCHED 2 /* rescheduling necessary */ 91#define TIF_NOTIFY_RESUME 5 /* callback before returning to user */ 92#define TIF_RESTORE_SIGMASK 9 /* restore signal mask in do_signal() */ 93#define TIF_POLLING_NRFLAG 17 /* true if poll_idle() is polling 94 TIF_NEED_RESCHED */ 95#define TIF_MEMDIE 18 /* is terminating due to OOM killer */ 96 97#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE) 98#define _TIF_SIGPENDING (1<<TIF_SIGPENDING) 99#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED) 100#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME) 101#define _TIF_RESTORE_SIGMASK (1<<TIF_RESTORE_SIGMASK) 102#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG) 103 104#define _TIF_WORK_MASK (0x0000ffff) 105 106#endif /* __KERNEL__ */ 107 108#endif /* _ASM_SCORE_THREAD_INFO_H */ 109