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Diffstat (limited to '')
| -rw-r--r-- | arch/m68k/include/asm/thread_info.h | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/arch/m68k/include/asm/thread_info.h b/arch/m68k/include/asm/thread_info.h new file mode 100644 index 000000000..c952658ba --- /dev/null +++ b/arch/m68k/include/asm/thread_info.h @@ -0,0 +1,77 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _ASM_M68K_THREAD_INFO_H +#define _ASM_M68K_THREAD_INFO_H + +#include <asm/types.h> +#include <asm/page.h> + +/* + * On machines with 4k pages we default to an 8k thread size, though we + * allow a 4k with config option. Any other machine page size then + * the thread size must match the page size (which is 8k and larger here). + */ +#if PAGE_SHIFT < 13 +#ifdef CONFIG_4KSTACKS +#define THREAD_SIZE 4096 +#else +#define THREAD_SIZE 8192 +#endif +#else +#define THREAD_SIZE PAGE_SIZE +#endif +#define THREAD_SIZE_ORDER ((THREAD_SIZE / PAGE_SIZE) - 1) + +#ifndef __ASSEMBLY__ + +struct thread_info { + struct task_struct *task; /* main task structure */ + unsigned long flags; + int preempt_count; /* 0 => preemptable, <0 => BUG */ + __u32 cpu; /* should always be 0 on m68k */ + unsigned long tp_value; /* thread pointer */ +}; +#endif /* __ASSEMBLY__ */ + +#define INIT_THREAD_INFO(tsk) \ +{ \ + .task = &tsk, \ + .preempt_count = INIT_PREEMPT_COUNT, \ +} + +#ifndef __ASSEMBLY__ +/* how to get the thread information struct from C */ +static inline struct thread_info *current_thread_info(void) +{ + struct thread_info *ti; + __asm__( + "move.l %%sp, %0 \n\t" + "and.l %1, %0" + : "=&d"(ti) + : "di" (~(THREAD_SIZE-1)) + ); + return ti; +} +#endif + +/* entry.S relies on these definitions! + * bits 0-7 are tested at every exception exit + * bits 8-15 are also tested at syscall exit + */ +#define TIF_NOTIFY_SIGNAL 4 +#define TIF_NOTIFY_RESUME 5 /* callback before returning to user */ +#define TIF_SIGPENDING 6 /* signal pending */ +#define TIF_NEED_RESCHED 7 /* rescheduling necessary */ +#define TIF_DELAYED_TRACE 14 /* single step a syscall */ +#define TIF_SYSCALL_TRACE 15 /* syscall trace active */ +#define TIF_MEMDIE 16 /* is terminating due to OOM killer */ +#define TIF_RESTORE_SIGMASK 18 /* restore signal mask in do_signal */ + +#define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME) +#define _TIF_SIGPENDING (1 << TIF_SIGPENDING) +#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED) +#define _TIF_DELAYED_TRACE (1 << TIF_DELAYED_TRACE) +#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE) +#define _TIF_MEMDIE (1 << TIF_MEMDIE) +#define _TIF_RESTORE_SIGMASK (1 << TIF_RESTORE_SIGMASK) + +#endif /* _ASM_M68K_THREAD_INFO_H */ |