| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | #ifndef _ALPHA_THREAD_INFO_H |
| 2 | #define _ALPHA_THREAD_INFO_H |
| 3 | |
| 4 | #ifdef __KERNEL__ |
| 5 | |
| 6 | #ifndef __ASSEMBLY__ |
| 7 | #include <asm/processor.h> |
| 8 | #include <asm/types.h> |
| 9 | #include <asm/hwrpb.h> |
| 10 | #endif |
| 11 | |
| 12 | #ifndef __ASSEMBLY__ |
| 13 | struct thread_info { |
| 14 | struct pcb_struct pcb; /* palcode state */ |
| 15 | |
| 16 | struct task_struct *task; /* main task structure */ |
| 17 | unsigned int flags; /* low level flags */ |
| 18 | unsigned int ieee_state; /* see fpu.h */ |
| 19 | |
| 20 | struct exec_domain *exec_domain; /* execution domain */ |
| 21 | mm_segment_t addr_limit; /* thread address space */ |
| 22 | unsigned cpu; /* current CPU */ |
| 23 | int preempt_count; /* 0 => preemptable, <0 => BUG */ |
| 24 | |
| 25 | int bpt_nsaved; |
| 26 | unsigned long bpt_addr[2]; /* breakpoint handling */ |
| 27 | unsigned int bpt_insn[2]; |
| 28 | |
| 29 | struct restart_block restart_block; |
| 30 | }; |
| 31 | |
| 32 | /* |
| 33 | * Macros/functions for gaining access to the thread information structure. |
| 34 | */ |
| 35 | #define INIT_THREAD_INFO(tsk) \ |
| 36 | { \ |
| 37 | .task = &tsk, \ |
| 38 | .exec_domain = &default_exec_domain, \ |
| 39 | .addr_limit = KERNEL_DS, \ |
| 40 | .restart_block = { \ |
| 41 | .fn = do_no_restart_syscall, \ |
| 42 | }, \ |
| 43 | } |
| 44 | |
| 45 | #define init_thread_info (init_thread_union.thread_info) |
| 46 | #define init_stack (init_thread_union.stack) |
| 47 | |
| 48 | /* How to get the thread information struct from C. */ |
| 49 | register struct thread_info *__current_thread_info __asm__("$8"); |
| 50 | #define current_thread_info() __current_thread_info |
| 51 | |
| 52 | /* Thread information allocation. */ |
| 53 | #define THREAD_SIZE (2*PAGE_SIZE) |
| 54 | #define alloc_thread_info(tsk) \ |
| 55 | ((struct thread_info *) __get_free_pages(GFP_KERNEL,1)) |
| 56 | #define free_thread_info(ti) free_pages((unsigned long) (ti), 1) |
| 57 | #define get_thread_info(ti) get_task_struct((ti)->task) |
| 58 | #define put_thread_info(ti) put_task_struct((ti)->task) |
| 59 | |
| 60 | #endif /* __ASSEMBLY__ */ |
| 61 | |
| 62 | #define PREEMPT_ACTIVE 0x40000000 |
| 63 | |
| 64 | /* |
| 65 | * Thread information flags: |
| 66 | * - these are process state flags and used from assembly |
| 67 | * - pending work-to-be-done flags come first to fit in and immediate operand. |
| 68 | * |
| 69 | * TIF_SYSCALL_TRACE is known to be 0 via blbs. |
| 70 | */ |
| 71 | #define TIF_SYSCALL_TRACE 0 /* syscall trace active */ |
| 72 | #define TIF_NOTIFY_RESUME 1 /* resumption notification requested */ |
| 73 | #define TIF_SIGPENDING 2 /* signal pending */ |
| 74 | #define TIF_NEED_RESCHED 3 /* rescheduling necessary */ |
| 75 | #define TIF_POLLING_NRFLAG 4 /* poll_idle is polling NEED_RESCHED */ |
| 76 | #define TIF_DIE_IF_KERNEL 5 /* dik recursion lock */ |
| 77 | #define TIF_UAC_NOPRINT 6 /* see sysinfo.h */ |
| 78 | #define TIF_UAC_NOFIX 7 |
| 79 | #define TIF_UAC_SIGBUS 8 |
| 80 | #define TIF_MEMDIE 9 |
| 81 | |
| 82 | #define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE) |
| 83 | #define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME) |
| 84 | #define _TIF_SIGPENDING (1<<TIF_SIGPENDING) |
| 85 | #define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED) |
| 86 | #define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG) |
| 87 | |
| 88 | /* Work to do on interrupt/exception return. */ |
| 89 | #define _TIF_WORK_MASK (_TIF_NOTIFY_RESUME \ |
| 90 | | _TIF_SIGPENDING \ |
| 91 | | _TIF_NEED_RESCHED) |
| 92 | |
| 93 | /* Work to do on any return to userspace. */ |
| 94 | #define _TIF_ALLWORK_MASK (_TIF_WORK_MASK \ |
| 95 | | _TIF_SYSCALL_TRACE) |
| 96 | |
| 97 | #endif /* __KERNEL__ */ |
| 98 | #endif /* _ALPHA_THREAD_INFO_H */ |