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| 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
|---|---|
| 2 | /* |
| 3 | * Thread support for the Hexagon architecture |
| 4 | * |
| 5 | * Copyright (c) 2010-2011, The Linux Foundation. All rights reserved. |
| 6 | */ |
| 7 | |
| 8 | #ifndef _ASM_THREAD_INFO_H |
| 9 | #define _ASM_THREAD_INFO_H |
| 10 | |
| 11 | #ifdef __KERNEL__ |
| 12 | |
| 13 | #ifndef __ASSEMBLY__ |
| 14 | #include <asm/processor.h> |
| 15 | #include <asm/registers.h> |
| 16 | #include <asm/page.h> |
| 17 | #endif |
| 18 | |
| 19 | #define THREAD_SHIFT 12 |
| 20 | #define THREAD_SIZE (1<<THREAD_SHIFT) |
| 21 | #define THREAD_SIZE_ORDER (THREAD_SHIFT - PAGE_SHIFT) |
| 22 | |
| 23 | #ifndef __ASSEMBLY__ |
| 24 | |
| 25 | /* |
| 26 | * This is union'd with the "bottom" of the kernel stack. |
| 27 | * It keeps track of thread info which is handy for routines |
| 28 | * to access quickly. |
| 29 | */ |
| 30 | |
| 31 | struct thread_info { |
| 32 | struct task_struct *task; /* main task structure */ |
| 33 | unsigned long flags; /* low level flags */ |
| 34 | __u32 cpu; /* current cpu */ |
| 35 | int preempt_count; /* 0=>preemptible,<0=>BUG */ |
| 36 | /* |
| 37 | * used for syscalls somehow; |
| 38 | * seems to have a function pointer and four arguments |
| 39 | */ |
| 40 | /* Points to the current pt_regs frame */ |
| 41 | struct pt_regs *regs; |
| 42 | /* |
| 43 | * saved kernel sp at switch_to time; |
| 44 | * not sure if this is used (it's not in the VM model it seems; |
| 45 | * see thread_struct) |
| 46 | */ |
| 47 | unsigned long sp; |
| 48 | }; |
| 49 | |
| 50 | #else /* !__ASSEMBLY__ */ |
| 51 | |
| 52 | #include <asm/asm-offsets.h> |
| 53 | |
| 54 | #endif /* __ASSEMBLY__ */ |
| 55 | |
| 56 | #ifndef __ASSEMBLY__ |
| 57 | |
| 58 | #define INIT_THREAD_INFO(tsk) \ |
| 59 | { \ |
| 60 | .task = &tsk, \ |
| 61 | .flags = 0, \ |
| 62 | .cpu = 0, \ |
| 63 | .preempt_count = 1, \ |
| 64 | .sp = 0, \ |
| 65 | .regs = NULL, \ |
| 66 | } |
| 67 | |
| 68 | /* Tacky preprocessor trickery */ |
| 69 | #define qqstr(s) qstr(s) |
| 70 | #define qstr(s) #s |
| 71 | #define QUOTED_THREADINFO_REG qqstr(THREADINFO_REG) |
| 72 | |
| 73 | register struct thread_info *__current_thread_info asm(QUOTED_THREADINFO_REG); |
| 74 | #define current_thread_info() __current_thread_info |
| 75 | |
| 76 | #endif /* __ASSEMBLY__ */ |
| 77 | |
| 78 | /* |
| 79 | * thread information flags |
| 80 | * - these are process state flags that various assembly files |
| 81 | * may need to access |
| 82 | * - pending work-to-be-done flags are in LSW |
| 83 | * - other flags in MSW |
| 84 | */ |
| 85 | |
| 86 | #define TIF_SYSCALL_TRACE 0 /* syscall trace active */ |
| 87 | #define TIF_NOTIFY_RESUME 1 /* resumption notification requested */ |
| 88 | #define TIF_SIGPENDING 2 /* signal pending */ |
| 89 | #define TIF_NEED_RESCHED 3 /* rescheduling necessary */ |
| 90 | #define TIF_SINGLESTEP 4 /* restore ss @ return to usr mode */ |
| 91 | #define TIF_RESTORE_SIGMASK 6 /* restore sig mask in do_signal() */ |
| 92 | #define TIF_NOTIFY_SIGNAL 7 /* signal notifications exist */ |
| 93 | /* true if poll_idle() is polling TIF_NEED_RESCHED */ |
| 94 | #define TIF_MEMDIE 17 /* OOM killer killed process */ |
| 95 | |
| 96 | #define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE) |
| 97 | #define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME) |
| 98 | #define _TIF_SIGPENDING (1 << TIF_SIGPENDING) |
| 99 | #define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED) |
| 100 | #define _TIF_SINGLESTEP (1 << TIF_SINGLESTEP) |
| 101 | #define _TIF_NOTIFY_SIGNAL (1 << TIF_NOTIFY_SIGNAL) |
| 102 | |
| 103 | /* work to do on interrupt/exception return - All but TIF_SYSCALL_TRACE */ |
| 104 | #define _TIF_WORK_MASK (0x0000FFFF & ~_TIF_SYSCALL_TRACE) |
| 105 | |
| 106 | /* work to do on any return to u-space */ |
| 107 | #define _TIF_ALLWORK_MASK 0x0000FFFF |
| 108 | |
| 109 | #endif /* __KERNEL__ */ |
| 110 | |
| 111 | #endif |
| 112 |
Warning: This file is not a C or C++ file. It does not have highlighting.