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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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 | /* SPDX-License-Identifier: GPL-2.0 */ #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> #include <asm/sysinfo.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 */ unsigned cpu; /* current CPU */ int preempt_count; /* 0 => preemptable, <0 => BUG */ unsigned int status; /* thread-synchronous flags */ int bpt_nsaved; unsigned long bpt_addr[2]; /* breakpoint handling */ unsigned int bpt_insn[2]; unsigned long fp[32]; }; /* * Macros/functions for gaining access to the thread information structure. */ #define INIT_THREAD_INFO(tsk) \ { \ .task = &tsk, \ .preempt_count = INIT_PREEMPT_COUNT, \ } /* 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 register unsigned long *current_stack_pointer __asm__ ("$30"); #endif /* __ASSEMBLY__ */ /* Thread information allocation. */ #define THREAD_SIZE_ORDER 1 #define THREAD_SIZE (2*PAGE_SIZE) /* * 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. * * 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_SYSCALL_AUDIT 4 /* syscall audit active */ #define TIF_NOTIFY_SIGNAL 5 /* signal notifications exist */ #define TIF_DIE_IF_KERNEL 9 /* dik recursion lock */ #define TIF_MEMDIE 13 /* is terminating due to OOM killer */ #define TIF_POLLING_NRFLAG 14 /* idle is polling for TIF_NEED_RESCHED */ #define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE) #define _TIF_SIGPENDING (1<<TIF_SIGPENDING) #define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED) #define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME) #define _TIF_SYSCALL_AUDIT (1<<TIF_SYSCALL_AUDIT) #define _TIF_NOTIFY_SIGNAL (1<<TIF_NOTIFY_SIGNAL) #define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG) /* Work to do on interrupt/exception return. */ #define _TIF_WORK_MASK (_TIF_SIGPENDING | _TIF_NEED_RESCHED | \ _TIF_NOTIFY_RESUME | _TIF_NOTIFY_SIGNAL) #define TS_UAC_NOPRINT 0x0001 /* ! Preserve the following three */ #define TS_UAC_NOFIX 0x0002 /* ! flags as they match */ #define TS_UAC_SIGBUS 0x0004 /* ! userspace part of 'osf_sysinfo' */ #define TS_SAVED_FP 0x0008 #define TS_RESTORE_FP 0x0010 #define SET_UNALIGN_CTL(task,value) ({ \ __u32 status = task_thread_info(task)->status & ~UAC_BITMASK; \ if (value & PR_UNALIGN_NOPRINT) \ status |= TS_UAC_NOPRINT; \ if (value & PR_UNALIGN_SIGBUS) \ status |= TS_UAC_SIGBUS; \ if (value & 4) /* alpha-specific */ \ status |= TS_UAC_NOFIX; \ task_thread_info(task)->status = status; \ 0; }) #define GET_UNALIGN_CTL(task,value) ({ \ __u32 status = task_thread_info(task)->status & ~UAC_BITMASK; \ __u32 res = 0; \ if (status & TS_UAC_NOPRINT) \ res |= PR_UNALIGN_NOPRINT; \ if (status & TS_UAC_SIGBUS) \ res |= PR_UNALIGN_SIGBUS; \ if (status & TS_UAC_NOFIX) \ res |= 4; \ put_user(res, (int __user *)(value)); \ }) #ifndef __ASSEMBLY__ extern void __save_fpu(void); static inline void save_fpu(void) { if (!(current_thread_info()->status & TS_SAVED_FP)) { current_thread_info()->status |= TS_SAVED_FP; __save_fpu(); } } #endif #endif /* __KERNEL__ */ #endif /* _ALPHA_THREAD_INFO_H */ |