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-rw-r--r--arch/blackfin/include/asm/thread_info.h135
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diff --git a/arch/blackfin/include/asm/thread_info.h b/arch/blackfin/include/asm/thread_info.h
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+/*
+ * File: include/asm-blackfin/thread_info.h
+ * Based on: include/asm-m68knommu/thread_info.h
+ * Author: LG Soft India
+ * Copyright (C) 2004-2005 Analog Devices Inc.
+ * Created: Tue Sep 21 2004
+ * Description: Blackfin low-level thread information
+ * Modified:
+ * Bugs: Enter bugs at http://blackfin.uclinux.org/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; see the file COPYING.
+ * If not, write to the Free Software Foundation,
+ * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#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 */
+
+#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;
+ struct l1_scratch_task_info l1_task_info;
+};
+
+/*
+ * 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 = 1, \
+ .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;": "=&d"(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_POLLING_NRFLAG 3 /* true if poll_idle() is polling
+ TIF_NEED_RESCHED */
+#define TIF_MEMDIE 4
+#define TIF_RESTORE_SIGMASK 5 /* restore signal mask in do_signal() */
+#define TIF_FREEZE 6 /* is freezing for suspend */
+
+/* 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_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
+#define _TIF_RESTORE_SIGMASK (1<<TIF_RESTORE_SIGMASK)
+#define _TIF_FREEZE (1<<TIF_FREEZE)
+
+#define _TIF_WORK_MASK 0x0000FFFE /* work to do on interrupt/exception return */
+
+#endif /* __KERNEL__ */
+
+#endif /* _ASM_THREAD_INFO_H */