1 files changed, 143 insertions, 0 deletions

diff --git a/include/asm-blackfin/thread_info.h b/include/asm-blackfin/thread_info.h
new file mode 100644
index 000000000000..fa8f08cf283e
--- /dev/null
+++ b/include/asm-blackfin/thread_info.h
@@ -0,0 +1,143 @@
+/*
+ * 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
+
+#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)
+
+/*
+ * Size of kernel stack for each process. This must be a power of 2...
+ */
+#define THREAD_SIZE             8192    /* 2 pages */
+
+/* How to get the thread information struct from C */
+
+static inline struct thread_info *current_thread_info(void)
+    __attribute__ ((__const__));
+
+/* Given a task stack pointer, you can find it's task structure
+ * just by masking it to the 8K boundary.
+ */
+static inline struct thread_info *current_thread_info(void)
+{
+        struct thread_info *ti;
+      __asm__("%0 = sp;": "=&d"(ti):
+        );
+        return (struct thread_info *)((long)ti & ~8191UL);
+}
+
+/* thread information allocation */
+#define alloc_thread_info(tsk) ((struct thread_info *) \
+                                __get_free_pages(GFP_KERNEL, 1))
+#define free_thread_info(ti)    free_pages((unsigned long) (ti), 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_NOTIFY_RESUME       1       /* resumption notification requested */
+#define TIF_SIGPENDING          2       /* signal pending */
+#define TIF_NEED_RESCHED        3       /* rescheduling necessary */
+#define TIF_POLLING_NRFLAG      4       /* true if poll_idle() is polling
+                                           TIF_NEED_RESCHED */
+#define TIF_MEMDIE              5
+#define TIF_RESTORE_SIGMASK     6       /* restore signal mask in do_signal() */
+#define TIF_FREEZE              7       /* is freezing for suspend */
+
+/* as above, but as bit values */
+#define _TIF_SYSCALL_TRACE      (1<<TIF_SYSCALL_TRACE)
+#define _TIF_NOTIFY_RESUME      (1<<TIF_NOTIFY_RESUME)
+#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 */