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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 | #ifndef _ALPHA_THREAD_INFO_H #define _ALPHA_THREAD_INFO_H #ifdef __KERNEL__ #ifndef __ASSEMBLY__ #include <asm/processor.h> #include <asm/types.h> #include <asm/hwrpb.h> #endif #ifndef __ASSEMBLY__ struct thread_info { struct pcb_struct pcb; /* palcode state */ struct task_struct *task; /* main task structure */ unsigned int flags; /* low level flags */ unsigned int ieee_state; /* see fpu.h */ struct exec_domain *exec_domain; /* execution domain */ mm_segment_t addr_limit; /* thread address space */ unsigned cpu; /* current CPU */ int preempt_count; /* 0 => preemptable, <0 => BUG */ int bpt_nsaved; unsigned long bpt_addr[2]; /* breakpoint handling */ unsigned int bpt_insn[2]; struct restart_block restart_block; }; /* * Macros/functions for gaining access to the thread information structure. */ #define INIT_THREAD_INFO(tsk) \ { \ .task = &tsk, \ .exec_domain = &default_exec_domain, \ .addr_limit = KERNEL_DS, \ .preempt_count = INIT_PREEMPT_COUNT, \ .restart_block = { \ .fn = do_no_restart_syscall, \ }, \ } #define init_thread_info (init_thread_union.thread_info) #define init_stack (init_thread_union.stack) /* How to get the thread information struct from C. */ register struct thread_info *__current_thread_info __asm__("$8"); #define current_thread_info() __current_thread_info #endif /* __ASSEMBLY__ */ /* Thread information allocation. */ #define THREAD_SIZE_ORDER 1 #define THREAD_SIZE (2*PAGE_SIZE) #define PREEMPT_ACTIVE 0x40000000 /* * Thread information flags: * - these are process state flags and used from assembly * - pending work-to-be-done flags come first and must be assigned to be * within bits 0 to 7 to fit in and immediate operand. * - ALPHA_UAC_SHIFT below must be kept consistent with the unaligned * control flags. * * TIF_SYSCALL_TRACE is known to be 0 via blbs. */ #define TIF_SYSCALL_TRACE 0 /* syscall trace active */ #define TIF_NOTIFY_RESUME 1 /* callback before returning to user */ #define TIF_SIGPENDING 2 /* signal pending */ #define TIF_NEED_RESCHED 3 /* rescheduling necessary */ #define TIF_POLLING_NRFLAG 8 /* poll_idle is polling NEED_RESCHED */ #define TIF_DIE_IF_KERNEL 9 /* dik recursion lock */ #define TIF_UAC_NOPRINT 10 /* see sysinfo.h */ #define TIF_UAC_NOFIX 11 #define TIF_UAC_SIGBUS 12 #define TIF_MEMDIE 13 /* is terminating due to OOM killer */ #define TIF_RESTORE_SIGMASK 14 /* restore signal mask in do_signal */ #define TIF_FREEZE 16 /* is freezing for suspend */ #define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE) #define _TIF_SIGPENDING (1<<TIF_SIGPENDING) #define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED) #define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG) #define _TIF_RESTORE_SIGMASK (1<<TIF_RESTORE_SIGMASK) #define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME) #define _TIF_FREEZE (1<<TIF_FREEZE) /* Work to do on interrupt/exception return. */ #define _TIF_WORK_MASK (_TIF_SIGPENDING | _TIF_NEED_RESCHED | \ _TIF_NOTIFY_RESUME) /* Work to do on any return to userspace. */ #define _TIF_ALLWORK_MASK (_TIF_WORK_MASK \ | _TIF_SYSCALL_TRACE) #define ALPHA_UAC_SHIFT 10 #define ALPHA_UAC_MASK (1 << TIF_UAC_NOPRINT | 1 << TIF_UAC_NOFIX | \ 1 << TIF_UAC_SIGBUS) #define SET_UNALIGN_CTL(task,value) ({ \ task_thread_info(task)->flags = ((task_thread_info(task)->flags & \ ~ALPHA_UAC_MASK) \ | (((value) << ALPHA_UAC_SHIFT) & (1<<TIF_UAC_NOPRINT))\ | (((value) << (ALPHA_UAC_SHIFT + 1)) & (1<<TIF_UAC_SIGBUS)) \ | (((value) << (ALPHA_UAC_SHIFT - 1)) & (1<<TIF_UAC_NOFIX)));\ 0; }) #define GET_UNALIGN_CTL(task,value) ({ \ put_user((task_thread_info(task)->flags & (1 << TIF_UAC_NOPRINT))\ >> ALPHA_UAC_SHIFT \ | (task_thread_info(task)->flags & (1 << TIF_UAC_SIGBUS))\ >> (ALPHA_UAC_SHIFT + 1) \ | (task_thread_info(task)->flags & (1 << TIF_UAC_NOFIX))\ >> (ALPHA_UAC_SHIFT - 1), \ (int __user *)(value)); \ }) #endif /* __KERNEL__ */ #endif /* _ALPHA_THREAD_INFO_H */ |