This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / include / asm-avr32 / thread_info.h

diff --git a/include/asm-avr32/thread_info.h b/include/asm-avr32/thread_info.h
new file mode 100644 (file)
index 0000000..d1f5b35
--- /dev/null
+++ b/include/asm-avr32/thread_info.h
@@ -0,0 +1,106 @@
+/*
+ * Copyright (C) 2004-2006 Atmel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef __ASM_AVR32_THREAD_INFO_H
+#define __ASM_AVR32_THREAD_INFO_H
+
+#include <asm/page.h>
+
+#define THREAD_SIZE_ORDER      1
+#define THREAD_SIZE            (PAGE_SIZE << THREAD_SIZE_ORDER)
+
+#ifndef __ASSEMBLY__
+#include <asm/types.h>
+
+struct task_struct;
+struct exec_domain;
+
+struct thread_info {
+       struct task_struct      *task;          /* main task structure */
+       struct exec_domain      *exec_domain;   /* execution domain */
+       unsigned long           flags;          /* low level flags */
+       __u32                   cpu;
+       __s32                   preempt_count;  /* 0 => preemptable, <0 => BUG */
+       struct restart_block    restart_block;
+       __u8                    supervisor_stack[0];
+};
+
+#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)
+
+/*
+ * Get the thread information struct from C.
+ * We do the usual trick and use the lower end of the stack for this
+ */
+static inline struct thread_info *current_thread_info(void)
+{
+       unsigned long addr = ~(THREAD_SIZE - 1);
+
+       asm("and %0, sp" : "=r"(addr) : "0"(addr));
+       return (struct thread_info *)addr;
+}
+
+/* thread information allocation */
+#define alloc_thread_info(ti) \
+       ((struct thread_info *) __get_free_pages(GFP_KERNEL, THREAD_SIZE_ORDER))
+#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)
+
+#endif /* !__ASSEMBLY__ */
+
+#define PREEMPT_ACTIVE         0x40000000
+
+/*
+ * 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_POLLING_NRFLAG      4       /* true if poll_idle() is polling
+                                          TIF_NEED_RESCHED */
+#define TIF_BREAKPOINT         5       /* true if we should break after return */
+#define TIF_SINGLE_STEP                6       /* single step after next break */
+#define TIF_MEMDIE             7
+#define TIF_RESTORE_SIGMASK    8       /* restore signal mask in do_signal */
+#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_POLLING_NRFLAG    (1 << TIF_POLLING_NRFLAG)
+#define _TIF_BREAKPOINT                (1 << TIF_BREAKPOINT)
+#define _TIF_SINGLE_STEP       (1 << TIF_SINGLE_STEP)
+#define _TIF_MEMDIE            (1 << TIF_MEMDIE)
+#define _TIF_RESTORE_SIGMASK   (1 << TIF_RESTORE_SIGMASK)
+
+/* XXX: These two masks must never span more than 16 bits! */
+/* work to do on interrupt/exception return */
+#define _TIF_WORK_MASK         0x0000013e
+/* work to do on any return to userspace */
+#define _TIF_ALLWORK_MASK      0x0000013f
+/* work to do on return from debug mode */
+#define _TIF_DBGWORK_MASK      0x0000017e
+
+#endif /* __ASM_AVR32_THREAD_INFO_H */