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149 lines
3.9 KiB
149 lines
3.9 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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/* |
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* Copyright (C) 2006 Atmark Techno, Inc. |
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*/ |
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#ifndef _ASM_MICROBLAZE_THREAD_INFO_H |
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#define _ASM_MICROBLAZE_THREAD_INFO_H |
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#ifdef __KERNEL__ |
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/* we have 8k stack */ |
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#define THREAD_SHIFT 13 |
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#define THREAD_SIZE (1 << THREAD_SHIFT) |
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#define THREAD_SIZE_ORDER 1 |
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#ifndef __ASSEMBLY__ |
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# include <linux/types.h> |
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# include <asm/processor.h> |
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/* |
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* low level task data that entry.S needs immediate access to |
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* - this struct should fit entirely inside of one cache line |
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* - this struct shares the supervisor stack pages |
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* - if the contents of this structure are changed, the assembly constants |
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* must also be changed |
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*/ |
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struct cpu_context { |
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__u32 r1; /* stack pointer */ |
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__u32 r2; |
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/* dedicated registers */ |
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__u32 r13; |
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__u32 r14; |
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__u32 r15; |
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__u32 r16; |
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__u32 r17; |
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__u32 r18; |
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/* non-volatile registers */ |
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__u32 r19; |
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__u32 r20; |
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__u32 r21; |
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__u32 r22; |
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__u32 r23; |
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__u32 r24; |
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__u32 r25; |
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__u32 r26; |
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__u32 r27; |
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__u32 r28; |
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__u32 r29; |
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__u32 r30; |
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/* r31 is used as current task pointer */ |
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/* special purpose registers */ |
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__u32 msr; |
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__u32 ear; |
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__u32 esr; |
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__u32 fsr; |
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}; |
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typedef struct { |
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unsigned long seg; |
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} mm_segment_t; |
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struct thread_info { |
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struct task_struct *task; /* main task structure */ |
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unsigned long flags; /* low level flags */ |
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unsigned long status; /* thread-synchronous flags */ |
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__u32 cpu; /* current CPU */ |
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__s32 preempt_count; /* 0 => preemptable,< 0 => BUG*/ |
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mm_segment_t addr_limit; /* thread address space */ |
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struct cpu_context cpu_context; |
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}; |
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/* |
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* macros/functions for gaining access to the thread information structure |
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*/ |
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#define INIT_THREAD_INFO(tsk) \ |
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{ \ |
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.task = &tsk, \ |
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.flags = 0, \ |
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.cpu = 0, \ |
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.preempt_count = INIT_PREEMPT_COUNT, \ |
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.addr_limit = KERNEL_DS, \ |
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} |
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/* how to get the thread information struct from C */ |
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static inline struct thread_info *current_thread_info(void) |
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{ |
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register unsigned long sp asm("r1"); |
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return (struct thread_info *)(sp & ~(THREAD_SIZE-1)); |
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} |
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/* thread information allocation */ |
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#endif /* __ASSEMBLY__ */ |
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/* |
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* thread information flags |
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* - these are process state flags that various assembly files may |
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* need to access |
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* - pending work-to-be-done flags are in LSW |
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* - other flags in MSW |
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*/ |
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#define TIF_SYSCALL_TRACE 0 /* syscall trace active */ |
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#define TIF_NOTIFY_RESUME 1 /* resumption notification requested */ |
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#define TIF_SIGPENDING 2 /* signal pending */ |
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#define TIF_NEED_RESCHED 3 /* rescheduling necessary */ |
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/* restore singlestep on return to user mode */ |
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#define TIF_SINGLESTEP 4 |
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#define TIF_NOTIFY_SIGNAL 5 /* signal notifications exist */ |
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#define TIF_MEMDIE 6 /* is terminating due to OOM killer */ |
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#define TIF_SYSCALL_AUDIT 9 /* syscall auditing active */ |
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#define TIF_SECCOMP 10 /* secure computing */ |
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/* true if poll_idle() is polling TIF_NEED_RESCHED */ |
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#define TIF_POLLING_NRFLAG 16 |
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#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE) |
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#define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME) |
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#define _TIF_SIGPENDING (1 << TIF_SIGPENDING) |
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#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED) |
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#define _TIF_SINGLESTEP (1 << TIF_SINGLESTEP) |
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#define _TIF_NOTIFY_SIGNAL (1 << TIF_NOTIFY_SIGNAL) |
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#define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG) |
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#define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT) |
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#define _TIF_SECCOMP (1 << TIF_SECCOMP) |
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/* work to do in syscall trace */ |
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#define _TIF_WORK_SYSCALL_MASK (_TIF_SYSCALL_TRACE | _TIF_SINGLESTEP | \ |
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_TIF_SYSCALL_AUDIT | _TIF_SECCOMP) |
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/* work to do on interrupt/exception return */ |
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#define _TIF_WORK_MASK 0x0000FFFE |
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/* work to do on any return to u-space */ |
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#define _TIF_ALLWORK_MASK 0x0000FFFF |
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/* |
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* Thread-synchronous status. |
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* |
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* This is different from the flags in that nobody else |
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* ever touches our thread-synchronous status, so we don't |
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* have to worry about atomic accesses. |
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*/ |
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/* FPU was used by this task this quantum (SMP) */ |
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#define TS_USEDFPU 0x0001 |
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#endif /* __KERNEL__ */ |
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#endif /* _ASM_MICROBLAZE_THREAD_INFO_H */
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