From 8e4bff4cab0ddac6060645b0715210484d02ff40 Mon Sep 17 00:00:00 2001
From: Yuval Adam <_@yuv.al>
Date: Wed, 30 Aug 2017 08:25:59 +0000
Subject: Initial file dump from open source release

---
 arch/blackfin/include/asm/thread_info.h | 117 ++++++++++++++++++++++++++++++++
 1 file changed, 117 insertions(+)
 create mode 100644 arch/blackfin/include/asm/thread_info.h

(limited to 'arch/blackfin/include/asm/thread_info.h')

diff --git a/arch/blackfin/include/asm/thread_info.h b/arch/blackfin/include/asm/thread_info.h
new file mode 100644
index 00000000..38940053
--- /dev/null
+++ b/arch/blackfin/include/asm/thread_info.h
@@ -0,0 +1,117 @@
+/*
+ * Copyright 2004-2010 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#ifndef _ASM_THREAD_INFO_H
+#define _ASM_THREAD_INFO_H
+
+#include <asm/page.h>
+#include <asm/entry.h>
+#include <asm/l1layout.h>
+#include <linux/compiler.h>
+
+#ifdef __KERNEL__
+
+/* Thread Align Mask to reach to the top of the stack
+ * for any process
+ */
+#define ALIGN_PAGE_MASK		0xffffe000
+
+/*
+ * Size of kernel stack for each process. This must be a power of 2...
+ */
+#define THREAD_SIZE_ORDER	1
+#define THREAD_SIZE		8192	/* 2 pages */
+#define STACK_WARN		(THREAD_SIZE/8)
+
+#ifndef __ASSEMBLY__
+
+typedef unsigned long mm_segment_t;
+
+/*
+ * low level task data.
+ * If you change this, change the TI_* offsets below to match.
+ */
+
+struct thread_info {
+	struct task_struct *task;	/* main task structure */
+	struct exec_domain *exec_domain;	/* execution domain */
+	unsigned long flags;	/* low level flags */
+	int cpu;		/* cpu we're on */
+	int preempt_count;	/* 0 => preemptable, <0 => BUG */
+	mm_segment_t addr_limit;	/* address limit */
+	struct restart_block restart_block;
+#ifndef CONFIG_SMP
+	struct l1_scratch_task_info l1_task_info;
+#endif
+};
+
+/*
+ * macros/functions for gaining access to the thread information structure
+ */
+#define INIT_THREAD_INFO(tsk)			\
+{						\
+	.task		= &tsk,			\
+	.exec_domain	= &default_exec_domain,	\
+	.flags		= 0,			\
+	.cpu		= 0,			\
+	.preempt_count	= INIT_PREEMPT_COUNT,	\
+	.restart_block	= {			\
+		.fn = do_no_restart_syscall,	\
+	},					\
+}
+#define init_thread_info	(init_thread_union.thread_info)
+#define init_stack		(init_thread_union.stack)
+
+/* Given a task stack pointer, you can find its corresponding
+ * thread_info structure just by masking it to the THREAD_SIZE
+ * boundary (currently 8K as you can see above).
+ */
+__attribute_const__
+static inline struct thread_info *current_thread_info(void)
+{
+	struct thread_info *ti;
+	__asm__("%0 = sp;" : "=da"(ti));
+	return (struct thread_info *)((long)ti & ~((long)THREAD_SIZE-1));
+}
+
+#endif				/* __ASSEMBLY__ */
+
+/*
+ * Offsets in thread_info structure, used in assembly code
+ */
+#define TI_TASK		0
+#define TI_EXECDOMAIN	4
+#define TI_FLAGS	8
+#define TI_CPU		12
+#define TI_PREEMPT	16
+
+#define	PREEMPT_ACTIVE	0x4000000
+
+/*
+ * thread information flag bit numbers
+ */
+#define TIF_SYSCALL_TRACE	0	/* syscall trace active */
+#define TIF_SIGPENDING		1	/* signal pending */
+#define TIF_NEED_RESCHED	2	/* rescheduling necessary */
+#define TIF_MEMDIE		4	/* is terminating due to OOM killer */
+#define TIF_RESTORE_SIGMASK	5	/* restore signal mask in do_signal() */
+#define TIF_IRQ_SYNC		7	/* sync pipeline stage */
+#define TIF_NOTIFY_RESUME	8	/* callback before returning to user */
+#define TIF_SINGLESTEP		9
+
+/* as above, but as bit values */
+#define _TIF_SYSCALL_TRACE	(1<<TIF_SYSCALL_TRACE)
+#define _TIF_SIGPENDING		(1<<TIF_SIGPENDING)
+#define _TIF_NEED_RESCHED	(1<<TIF_NEED_RESCHED)
+#define _TIF_IRQ_SYNC		(1<<TIF_IRQ_SYNC)
+#define _TIF_NOTIFY_RESUME	(1<<TIF_NOTIFY_RESUME)
+#define _TIF_SINGLESTEP		(1<<TIF_SINGLESTEP)
+
+#define _TIF_WORK_MASK		0x0000FFFE	/* work to do on interrupt/exception return */
+
+#endif				/* __KERNEL__ */
+
+#endif				/* _ASM_THREAD_INFO_H */
-- 
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