1 files changed, 102 insertions, 0 deletions

diff --git a/include/asm-sh/thread_info.h b/include/asm-sh/thread_info.h
new file mode 100644
index 000000000000..d82f883d8e6d
--- /dev/null
+++ b/include/asm-sh/thread_info.h
@@ -0,0 +1,102 @@
+#ifndef __ASM_SH_THREAD_INFO_H
+#define __ASM_SH_THREAD_INFO_H
+
+/* SuperH version
+ * Copyright (C) 2002  Niibe Yutaka
+ *
+ * The copyright of original i386 version is:
+ *
+ *  Copyright (C) 2002  David Howells (dhowells@redhat.com)
+ *  - Incorporating suggestions made by Linus Torvalds and Dave Miller
+ */
+
+#ifdef __KERNEL__
+
+#ifndef __ASSEMBLY__
+#include <asm/processor.h>
+
+struct thread_info {
+        struct task_struct      *task;          /* main task structure */
+        struct exec_domain      *exec_domain;   /* execution domain */
+        __u32                   flags;          /* low level flags */
+        __u32                   cpu;
+        __s32                   preempt_count; /* 0 => preemptable, <0 => BUG */
+        struct restart_block    restart_block;
+        __u8                    supervisor_stack[0];
+};
+
+#endif
+
+#define PREEMPT_ACTIVE          0x4000000
+
+/*
+ * macros/functions for gaining access to the thread information structure
+ */
+#ifndef __ASSEMBLY__
+#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)
+
+/* how to get the thread information struct from C */
+static inline struct thread_info *current_thread_info(void)
+{
+        struct thread_info *ti;
+        __asm__("stc    r7_bank, %0" : "=r" (ti));
+        return ti;
+}
+
+/* thread information allocation */
+#define THREAD_SIZE (2*PAGE_SIZE)
+#define alloc_thread_info(ti) ((struct thread_info *) __get_free_pages(GFP_KERNEL,1))
+#define free_thread_info(ti) free_pages((unsigned long) (ti), 1)
+#define get_thread_info(ti) get_task_struct((ti)->task)
+#define put_thread_info(ti) put_task_struct((ti)->task)
+
+#else /* !__ASSEMBLY__ */
+
+/* how to get the thread information struct from ASM */
+#define GET_THREAD_INFO(reg) \
+        stc     r7_bank, reg
+
+#endif
+
+/*
+ * thread information flags
+ * - these are process state flags that various assembly files may need to access
+ * - pending work-to-be-done flags are in LSW
+ * - other flags in MSW
+ */
+#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_USEDFPU             16      /* FPU was used by this task this quantum (SMP) */
+#define TIF_POLLING_NRFLAG      17      /* true if poll_idle() is polling TIF_NEED_RESCHED */
+#define TIF_MEMDIE              18
+#define TIF_USERSPACE           31      /* true if FS sets userspace */
+
+#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_USEDFPU            (1<<TIF_USEDFPU)
+#define _TIF_POLLING_NRFLAG     (1<<TIF_POLLING_NRFLAG)
+#define _TIF_USERSPACE          (1<<TIF_USERSPACE)
+
+#define _TIF_WORK_MASK          0x000000FE      /* work to do on interrupt/exception return */
+#define _TIF_ALLWORK_MASK       0x000000FF      /* work to do on any return to u-space */
+
+#endif /* __KERNEL__ */
+
+#endif /* __ASM_SH_THREAD_INFO_H */