1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Copyright (C) 2006 Atmark Techno, Inc. 4 */ 5 6 #ifndef _ASM_MICROBLAZE_THREAD_INFO_H 7 #define _ASM_MICROBLAZE_THREAD_INFO_H 8 9 #ifdef __KERNEL__ 10 11 /* we have 8k stack */ 12 #define THREAD_SHIFT 13 13 #define THREAD_SIZE (1 << THREAD_SHIFT) 14 #define THREAD_SIZE_ORDER 1 15 16 #ifndef __ASSEMBLY__ 17 # include <linux/types.h> 18 # include <asm/processor.h> 19 20 /* 21 * low level task data that entry.S needs immediate access to 22 * - this struct should fit entirely inside of one cache line 23 * - this struct shares the supervisor stack pages 24 * - if the contents of this structure are changed, the assembly constants 25 * must also be changed 26 */ 27 28 struct cpu_context { 29 __u32 r1; /* stack pointer */ 30 __u32 r2; 31 /* dedicated registers */ 32 __u32 r13; 33 __u32 r14; 34 __u32 r15; 35 __u32 r16; 36 __u32 r17; 37 __u32 r18; 38 /* non-volatile registers */ 39 __u32 r19; 40 __u32 r20; 41 __u32 r21; 42 __u32 r22; 43 __u32 r23; 44 __u32 r24; 45 __u32 r25; 46 __u32 r26; 47 __u32 r27; 48 __u32 r28; 49 __u32 r29; 50 __u32 r30; 51 /* r31 is used as current task pointer */ 52 /* special purpose registers */ 53 __u32 msr; 54 __u32 ear; 55 __u32 esr; 56 __u32 fsr; 57 }; 58 59 struct thread_info { 60 struct task_struct *task; /* main task structure */ 61 unsigned long flags; /* low level flags */ 62 unsigned long status; /* thread-synchronous flags */ 63 __u32 cpu; /* current CPU */ 64 __s32 preempt_count; /* 0 => preemptable,< 0 => BUG*/ 65 66 struct cpu_context cpu_context; 67 }; 68 69 /* 70 * macros/functions for gaining access to the thread information structure 71 */ 72 #define INIT_THREAD_INFO(tsk) \ 73 { \ 74 .task = &tsk, \ 75 .flags = 0, \ 76 .cpu = 0, \ 77 .preempt_count = INIT_PREEMPT_COUNT, \ 78 } 79 80 /* how to get the thread information struct from C */ 81 static inline struct thread_info *current_thread_info(void) 82 { 83 register unsigned long sp asm("r1"); 84 85 return (struct thread_info *)(sp & ~(THREAD_SIZE-1)); 86 } 87 88 /* thread information allocation */ 89 #endif /* __ASSEMBLY__ */ 90 91 /* 92 * thread information flags 93 * - these are process state flags that various assembly files may 94 * need to access 95 * - pending work-to-be-done flags are in LSW 96 * - other flags in MSW 97 */ 98 #define TIF_SYSCALL_TRACE 0 /* syscall trace active */ 99 #define TIF_NOTIFY_RESUME 1 /* resumption notification requested */ 100 #define TIF_SIGPENDING 2 /* signal pending */ 101 #define TIF_NEED_RESCHED 3 /* rescheduling necessary */ 102 /* restore singlestep on return to user mode */ 103 #define TIF_SINGLESTEP 4 104 #define TIF_NOTIFY_SIGNAL 5 /* signal notifications exist */ 105 #define TIF_MEMDIE 6 /* is terminating due to OOM killer */ 106 #define TIF_SYSCALL_AUDIT 9 /* syscall auditing active */ 107 #define TIF_SECCOMP 10 /* secure computing */ 108 109 /* true if poll_idle() is polling TIF_NEED_RESCHED */ 110 #define TIF_POLLING_NRFLAG 16 111 112 #define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE) 113 #define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME) 114 #define _TIF_SIGPENDING (1 << TIF_SIGPENDING) 115 #define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED) 116 #define _TIF_SINGLESTEP (1 << TIF_SINGLESTEP) 117 #define _TIF_NOTIFY_SIGNAL (1 << TIF_NOTIFY_SIGNAL) 118 #define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG) 119 #define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT) 120 #define _TIF_SECCOMP (1 << TIF_SECCOMP) 121 122 /* work to do in syscall trace */ 123 #define _TIF_WORK_SYSCALL_MASK (_TIF_SYSCALL_TRACE | _TIF_SINGLESTEP | \ 124 _TIF_SYSCALL_AUDIT | _TIF_SECCOMP) 125 126 /* work to do on interrupt/exception return */ 127 #define _TIF_WORK_MASK 0x0000FFFE 128 129 /* work to do on any return to u-space */ 130 #define _TIF_ALLWORK_MASK 0x0000FFFF 131 132 /* 133 * Thread-synchronous status. 134 * 135 * This is different from the flags in that nobody else 136 * ever touches our thread-synchronous status, so we don't 137 * have to worry about atomic accesses. 138 */ 139 /* FPU was used by this task this quantum (SMP) */ 140 #define TS_USEDFPU 0x0001 141 142 #endif /* __KERNEL__ */ 143 #endif /* _ASM_MICROBLAZE_THREAD_INFO_H */ 144