1 files changed, 114 insertions, 0 deletions

diff --git a/arch/alpha/include/asm/thread_info.h b/arch/alpha/include/asm/thread_info.h
new file mode 100644
index 000000000000..15fda4344424
--- /dev/null
+++ b/arch/alpha/include/asm/thread_info.h
@@ -0,0 +1,114 @@
+#ifndef _ALPHA_THREAD_INFO_H
+#define _ALPHA_THREAD_INFO_H
+
+#ifdef __KERNEL__
+
+#ifndef __ASSEMBLY__
+#include <asm/processor.h>
+#include <asm/types.h>
+#include <asm/hwrpb.h>
+#endif
+
+#ifndef __ASSEMBLY__
+struct thread_info {
+        struct pcb_struct       pcb;            /* palcode state */
+
+        struct task_struct      *task;          /* main task structure */
+        unsigned int            flags;          /* low level flags */
+        unsigned int            ieee_state;     /* see fpu.h */
+
+        struct exec_domain      *exec_domain;   /* execution domain */
+        mm_segment_t            addr_limit;     /* thread address space */
+        unsigned                cpu;            /* current CPU */
+        int                     preempt_count; /* 0 => preemptable, <0 => BUG */
+
+        int bpt_nsaved;
+        unsigned long bpt_addr[2];              /* breakpoint handling  */
+        unsigned int bpt_insn[2];
+
+        struct restart_block    restart_block;
+};
+
+/*
+ * Macros/functions for gaining access to the thread information structure.
+ */
+#define INIT_THREAD_INFO(tsk)                   \
+{                                               \
+        .task           = &tsk,                 \
+        .exec_domain    = &default_exec_domain, \
+        .addr_limit     = KERNEL_DS,            \
+        .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.  */
+register struct thread_info *__current_thread_info __asm__("$8");
+#define current_thread_info()  __current_thread_info
+
+/* Thread information allocation.  */
+#define THREAD_SIZE_ORDER 1
+#define THREAD_SIZE (2*PAGE_SIZE)
+
+#endif /* __ASSEMBLY__ */
+
+#define PREEMPT_ACTIVE          0x40000000
+
+/*
+ * Thread information flags:
+ * - these are process state flags and used from assembly
+ * - pending work-to-be-done flags come first to fit in and immediate operand.
+ *
+ * TIF_SYSCALL_TRACE is known to be 0 via blbs.
+ */
+#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       /* poll_idle is polling NEED_RESCHED */
+#define TIF_DIE_IF_KERNEL       4       /* dik recursion lock */
+#define TIF_UAC_NOPRINT         5       /* see sysinfo.h */
+#define TIF_UAC_NOFIX           6
+#define TIF_UAC_SIGBUS          7
+#define TIF_MEMDIE              8
+#define TIF_RESTORE_SIGMASK     9       /* restore signal mask in do_signal */
+
+#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)
+
+/* Work to do on interrupt/exception return.  */
+#define _TIF_WORK_MASK          (_TIF_SIGPENDING | _TIF_NEED_RESCHED)
+
+/* Work to do on any return to userspace.  */
+#define _TIF_ALLWORK_MASK       (_TIF_WORK_MASK         \
+                                 | _TIF_SYSCALL_TRACE)
+
+#define ALPHA_UAC_SHIFT         6
+#define ALPHA_UAC_MASK          (1 << TIF_UAC_NOPRINT | 1 << TIF_UAC_NOFIX | \
+                                 1 << TIF_UAC_SIGBUS)
+
+#define SET_UNALIGN_CTL(task,value)     ({                                   \
+        task_thread_info(task)->flags = ((task_thread_info(task)->flags &    \
+                ~ALPHA_UAC_MASK)                                             \
+                | (((value) << ALPHA_UAC_SHIFT)       & (1<<TIF_UAC_NOPRINT))\
+                | (((value) << (ALPHA_UAC_SHIFT + 1)) & (1<<TIF_UAC_SIGBUS)) \
+                | (((value) << (ALPHA_UAC_SHIFT - 1)) & (1<<TIF_UAC_NOFIX)));\
+        0; })
+
+#define GET_UNALIGN_CTL(task,value)     ({                              \
+        put_user((task_thread_info(task)->flags & (1 << TIF_UAC_NOPRINT))\
+                  >> ALPHA_UAC_SHIFT                                    \
+                 | (task_thread_info(task)->flags & (1 << TIF_UAC_SIGBUS))\
+                 >> (ALPHA_UAC_SHIFT + 1)                               \
+                 | (task_thread_info(task)->flags & (1 << TIF_UAC_NOFIX))\
+                 >> (ALPHA_UAC_SHIFT - 1),                              \
+                 (int __user *)(value));                                \
+        })
+
+#endif /* __KERNEL__ */
+#endif /* _ALPHA_THREAD_INFO_H */