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80 lines
2.3 KiB
80 lines
2.3 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef _ASM_M68K_THREAD_INFO_H |
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#define _ASM_M68K_THREAD_INFO_H |
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#include <asm/types.h> |
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#include <asm/page.h> |
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#include <asm/segment.h> |
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/* |
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* On machines with 4k pages we default to an 8k thread size, though we |
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* allow a 4k with config option. Any other machine page size then |
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* the thread size must match the page size (which is 8k and larger here). |
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*/ |
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#if PAGE_SHIFT < 13 |
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#ifdef CONFIG_4KSTACKS |
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#define THREAD_SIZE 4096 |
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#else |
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#define THREAD_SIZE 8192 |
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#endif |
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#else |
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#define THREAD_SIZE PAGE_SIZE |
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#endif |
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#define THREAD_SIZE_ORDER ((THREAD_SIZE / PAGE_SIZE) - 1) |
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#ifndef __ASSEMBLY__ |
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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; |
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mm_segment_t addr_limit; /* thread address space */ |
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int preempt_count; /* 0 => preemptable, <0 => BUG */ |
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__u32 cpu; /* should always be 0 on m68k */ |
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unsigned long tp_value; /* thread pointer */ |
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}; |
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#endif /* __ASSEMBLY__ */ |
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#define INIT_THREAD_INFO(tsk) \ |
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{ \ |
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.task = &tsk, \ |
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.addr_limit = KERNEL_DS, \ |
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.preempt_count = INIT_PREEMPT_COUNT, \ |
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} |
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#ifndef __ASSEMBLY__ |
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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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struct thread_info *ti; |
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__asm__( |
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"move.l %%sp, %0 \n\t" |
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"and.l %1, %0" |
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: "=&d"(ti) |
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: "di" (~(THREAD_SIZE-1)) |
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); |
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return ti; |
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} |
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#endif |
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/* entry.S relies on these definitions! |
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* bits 0-7 are tested at every exception exit |
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* bits 8-15 are also tested at syscall exit |
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*/ |
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#define TIF_NOTIFY_SIGNAL 4 |
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#define TIF_NOTIFY_RESUME 5 /* callback before returning to user */ |
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#define TIF_SIGPENDING 6 /* signal pending */ |
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#define TIF_NEED_RESCHED 7 /* rescheduling necessary */ |
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#define TIF_DELAYED_TRACE 14 /* single step a syscall */ |
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#define TIF_SYSCALL_TRACE 15 /* syscall trace active */ |
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#define TIF_MEMDIE 16 /* is terminating due to OOM killer */ |
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#define TIF_RESTORE_SIGMASK 18 /* restore signal mask in do_signal */ |
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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_DELAYED_TRACE (1 << TIF_DELAYED_TRACE) |
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#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE) |
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#define _TIF_MEMDIE (1 << TIF_MEMDIE) |
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#define _TIF_RESTORE_SIGMASK (1 << TIF_RESTORE_SIGMASK) |
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#endif /* _ASM_M68K_THREAD_INFO_H */
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