Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / arch / c6x / include / asm / thread_info.h

diff --git a/kernel/arch/c6x/include/asm/thread_info.h b/kernel/arch/c6x/include/asm/thread_info.h
new file mode 100644 (file)
index 0000000..acc70c1
--- /dev/null
+++ b/kernel/arch/c6x/include/asm/thread_info.h
@@ -0,0 +1,99 @@
+/*
+ *  Port on Texas Instruments TMS320C6x architecture
+ *
+ *  Copyright (C) 2004, 2009, 2010, 2011 Texas Instruments Incorporated
+ *  Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com)
+ *
+ *  Updated for 2.6.3x: Mark Salter <msalter@redhat.com>
+ *
+ *  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_C6X_THREAD_INFO_H
+#define _ASM_C6X_THREAD_INFO_H
+
+#ifdef __KERNEL__
+
+#include <asm/page.h>
+
+#ifdef CONFIG_4KSTACKS
+#define THREAD_SIZE            4096
+#define THREAD_SHIFT           12
+#define THREAD_SIZE_ORDER      0
+#else
+#define THREAD_SIZE            8192
+#define THREAD_SHIFT           13
+#define THREAD_SIZE_ORDER      1
+#endif
+
+#define THREAD_START_SP                (THREAD_SIZE - 8)
+
+#ifndef __ASSEMBLY__
+
+typedef struct {
+       unsigned long seg;
+} mm_segment_t;
+
+/*
+ * low level task data.
+ */
+struct thread_info {
+       struct task_struct      *task;          /* main task structure */
+       unsigned long           flags;          /* low level flags */
+       int                     cpu;            /* cpu we're on */
+       int                     preempt_count;  /* 0 = preemptable, <0 = BUG */
+       mm_segment_t            addr_limit;     /* thread address space */
+};
+
+/*
+ * macros/functions for gaining access to the thread information structure
+ *
+ * preempt_count needs to be 1 initially, until the scheduler is functional.
+ */
+#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)
+
+/* get the thread information struct of current task */
+static inline __attribute__((const))
+struct thread_info *current_thread_info(void)
+{
+       struct thread_info *ti;
+       asm volatile (" clr   .s2 B15,0,%1,%0\n"
+                     : "=b" (ti)
+                     : "Iu5" (THREAD_SHIFT - 1));
+       return ti;
+}
+
+#define get_thread_info(ti)    get_task_struct((ti)->task)
+#define put_thread_info(ti)    put_task_struct((ti)->task)
+#endif /* __ASSEMBLY__ */
+
+/*
+ * thread information flag bit numbers
+ * - 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_RESTORE_SIGMASK    4       /* restore signal mask in do_signal() */
+
+#define TIF_MEMDIE             17      /* OOM killer killed process */
+
+#define TIF_WORK_MASK          0x00007FFE /* work on irq/exception return */
+#define TIF_ALLWORK_MASK       0x00007FFF /* work on any return to u-space */
+
+#endif /* __KERNEL__ */
+
+#endif /* _ASM_C6X_THREAD_INFO_H */