Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / arch / mn10300 / include / asm / thread_info.h

diff --git a/kernel/arch/mn10300/include/asm/thread_info.h b/kernel/arch/mn10300/include/asm/thread_info.h
new file mode 100644 (file)
index 0000000..4861a78
--- /dev/null
+++ b/kernel/arch/mn10300/include/asm/thread_info.h
@@ -0,0 +1,162 @@
+/* MN10300 Low-level thread information
+ *
+ * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public Licence
+ * as published by the Free Software Foundation; either version
+ * 2 of the Licence, or (at your option) any later version.
+ */
+
+#ifndef _ASM_THREAD_INFO_H
+#define _ASM_THREAD_INFO_H
+
+#ifdef __KERNEL__
+
+#include <asm/page.h>
+
+#ifdef CONFIG_4KSTACKS
+#define THREAD_SIZE            (4096)
+#define THREAD_SIZE_ORDER      (0)
+#else
+#define THREAD_SIZE            (8192)
+#define THREAD_SIZE_ORDER      (1)
+#endif
+
+#define STACK_WARN             (THREAD_SIZE / 8)
+
+/*
+ * low level task data that entry.S needs immediate access to
+ * - this struct should fit entirely inside of one cache line
+ * - this struct shares the supervisor stack pages
+ * - if the contents of this structure are changed, the assembly constants
+ *   must also be changed
+ */
+#ifndef __ASSEMBLY__
+typedef struct {
+       unsigned long   seg;
+} mm_segment_t;
+
+struct thread_info {
+       struct task_struct      *task;          /* main task structure */
+       struct pt_regs          *frame;         /* current exception frame */
+       unsigned long           flags;          /* low level flags */
+       __u32                   cpu;            /* current CPU */
+       __s32                   preempt_count;  /* 0 => preemptable, <0 => BUG */
+
+       mm_segment_t            addr_limit;     /* thread address space:
+                                                  0-0xBFFFFFFF for user-thead
+                                                  0-0xFFFFFFFF for kernel-thread
+                                               */
+
+       __u8                    supervisor_stack[0];
+};
+
+#define thread_info_to_uregs(ti)                                       \
+       ((struct pt_regs *)                                             \
+        ((unsigned long)ti + THREAD_SIZE - sizeof(struct pt_regs)))
+
+#else /* !__ASSEMBLY__ */
+
+#ifndef __ASM_OFFSETS_H__
+#include <asm/asm-offsets.h>
+#endif
+
+#endif
+
+/*
+ * macros/functions for gaining access to the thread information structure
+ */
+#ifndef __ASSEMBLY__
+
+#define INIT_THREAD_INFO(tsk)                  \
+{                                              \
+       .task           = &tsk,                 \
+       .flags          = 0,                    \
+       .cpu            = 0,                    \
+       .preempt_count  = INIT_PREEMPT_COUNT,   \
+       .addr_limit     = KERNEL_DS,            \
+}
+
+#define init_thread_info       (init_thread_union.thread_info)
+#define init_stack             (init_thread_union.stack)
+#define init_uregs                                                     \
+       ((struct pt_regs *)                                             \
+        ((unsigned long) init_stack + THREAD_SIZE - sizeof(struct pt_regs)))
+
+extern struct thread_info *__current_ti;
+
+/* how to get the thread information struct from C */
+static inline __attribute__((const))
+struct thread_info *current_thread_info(void)
+{
+       struct thread_info *ti;
+       asm("mov sp,%0\n"
+           "and %1,%0\n"
+           : "=d" (ti)
+           : "i" (~(THREAD_SIZE - 1))
+           : "cc");
+       return ti;
+}
+
+static inline __attribute__((const))
+struct pt_regs *current_frame(void)
+{
+       return current_thread_info()->frame;
+}
+
+/* how to get the current stack pointer from C */
+static inline unsigned long current_stack_pointer(void)
+{
+       unsigned long sp;
+       asm("mov sp,%0; ":"=r" (sp));
+       return sp;
+}
+
+#ifndef CONFIG_KGDB
+void arch_release_thread_info(struct thread_info *ti);
+#endif
+#define get_thread_info(ti)    get_task_struct((ti)->task)
+#define put_thread_info(ti)    put_task_struct((ti)->task)
+
+#else /* !__ASSEMBLY__ */
+
+#ifndef __VMLINUX_LDS__
+/* how to get the thread information struct from ASM */
+.macro GET_THREAD_INFO reg
+       mov     sp,\reg
+       and     -THREAD_SIZE,\reg
+.endm
+#endif
+#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_SINGLESTEP         4       /* restore singlestep on return to user mode */
+#define TIF_RESTORE_SIGMASK    5       /* restore signal mask in do_signal() */
+#define TIF_POLLING_NRFLAG     16      /* true if poll_idle() is polling TIF_NEED_RESCHED */
+#define TIF_MEMDIE             17      /* is terminating due to OOM killer */
+
+#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_SINGLESTEP                +(1 << TIF_SINGLESTEP)
+#define _TIF_POLLING_NRFLAG    +(1 << TIF_POLLING_NRFLAG)
+
+#define _TIF_WORK_MASK         0x0000FFFE      /* work to do on interrupt/exception return */
+#define _TIF_ALLWORK_MASK      0x0000FFFF      /* work to do on any return to u-space */
+
+#endif /* __KERNEL__ */
+
+#endif /* _ASM_THREAD_INFO_H */