1 files changed, 80 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..15a757073
--- /dev/null
+++ b/arch/m68k/include/asm/thread_info.h
@@ -0,0 +1,80 @@
+/* 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>
+#include <asm/segment.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;
+	mm_segment_t		addr_limit;	/* thread address space */
+	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,			\
+	.addr_limit	= KERNEL_DS,		\
+	.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 */