include/asm-xtensa/thread_info.h

   1 /*
   2  * include/asm-xtensa/thread_info.h
   3  *
   4  * This file is subject to the terms and conditions of the GNU General Public
   5  * License.  See the file "COPYING" in the main directory of this archive
   6  * for more details.
   7  *
   8  * Copyright (C) 2001 - 2005 Tensilica Inc.
   9  */
  10
  11 #ifndef _XTENSA_THREAD_INFO_H
  12 #define _XTENSA_THREAD_INFO_H
  13
  14 #ifdef __KERNEL__
  15
  16 #ifndef __ASSEMBLY__
  17 # include <asm/processor.h>
  18 #endif
  19
  20 /*
  21  * low level task data that entry.S needs immediate access to
  22  * - this struct should fit entirely inside of one cache line
  23  * - this struct shares the supervisor stack pages
  24  * - if the contents of this structure are changed, the assembly constants
  25  *   must also be changed
  26  */
  27
  28 #ifndef __ASSEMBLY__
  29
  30 <<<<<<< HEAD:include/asm-xtensa/thread_info.h
  31 =======
  32 #if XTENSA_HAVE_COPROCESSORS
  33
  34 typedef struct xtregs_coprocessor {
  35         xtregs_cp0_t cp0;
  36         xtregs_cp1_t cp1;
  37         xtregs_cp2_t cp2;
  38         xtregs_cp3_t cp3;
  39         xtregs_cp4_t cp4;
  40         xtregs_cp5_t cp5;
  41         xtregs_cp6_t cp6;
  42         xtregs_cp7_t cp7;
  43 } xtregs_coprocessor_t;
  44
  45 #endif
  46
  47 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:include/asm-xtensa/thread_info.h
  48 struct thread_info {
  49         struct task_struct      *task;          /* main task structure */
  50         struct exec_domain      *exec_domain;   /* execution domain */
  51         unsigned long           flags;          /* low level flags */
  52         unsigned long           status;         /* thread-synchronous flags */
  53         __u32                   cpu;            /* current CPU */
  54         __s32                   preempt_count;  /* 0 => preemptable,< 0 => BUG*/
  55
  56         mm_segment_t            addr_limit;     /* thread address space */
  57         struct restart_block    restart_block;
  58
  59 <<<<<<< HEAD:include/asm-xtensa/thread_info.h
  60 =======
  61         unsigned long           cpenable;
  62 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:include/asm-xtensa/thread_info.h
  63
  64 <<<<<<< HEAD:include/asm-xtensa/thread_info.h
  65 =======
  66         /* Allocate storage for extra user states and coprocessor states. */
  67 #if XTENSA_HAVE_COPROCESSORS
  68         xtregs_coprocessor_t    xtregs_cp;
  69 #endif
  70         xtregs_user_t           xtregs_user;
  71 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:include/asm-xtensa/thread_info.h
  72 };
  73
  74 #else /* !__ASSEMBLY__ */
  75
  76 /* offsets into the thread_info struct for assembly code access */
  77 #define TI_TASK          0x00000000
  78 #define TI_EXEC_DOMAIN   0x00000004
  79 #define TI_FLAGS         0x00000008
  80 #define TI_STATUS        0x0000000C
  81 #define TI_CPU           0x00000010
  82 #define TI_PRE_COUNT     0x00000014
  83 #define TI_ADDR_LIMIT    0x00000018
  84 #define TI_RESTART_BLOCK 0x000001C
  85
  86 #endif
  87
  88 #define PREEMPT_ACTIVE          0x10000000
  89
  90 /*
  91  * macros/functions for gaining access to the thread information structure
  92  *
  93  * preempt_count needs to be 1 initially, until the scheduler is functional.
  94  */
  95
  96 #ifndef __ASSEMBLY__
  97
  98 #define INIT_THREAD_INFO(tsk)                   \
  99 {                                               \
 100         .task           = &tsk,                 \
 101         .exec_domain    = &default_exec_domain, \
 102         .flags          = 0,                    \
 103         .cpu            = 0,                    \
 104         .preempt_count  = 1,                    \
 105         .addr_limit     = KERNEL_DS,            \
 106         .restart_block = {                      \
 107                 .fn = do_no_restart_syscall,    \
 108         },                                      \
 109 }
 110
 111 #define init_thread_info        (init_thread_union.thread_info)
 112 #define init_stack              (init_thread_union.stack)
 113
 114 /* how to get the thread information struct from C */
 115 static inline struct thread_info *current_thread_info(void)
 116 {
 117         struct thread_info *ti;
 118          __asm__("extui %0,a1,0,13\n\t"
 119                  "xor %0, a1, %0" : "=&r" (ti) : );
 120         return ti;
 121 }
 122
 123 /* thread information allocation */
 124 #define alloc_thread_info(tsk) ((struct thread_info *) __get_free_pages(GFP_KERNEL,1))
 125 #define free_thread_info(ti) free_pages((unsigned long) (ti), 1)
 126
 127 #else /* !__ASSEMBLY__ */
 128
 129 /* how to get the thread information struct from ASM */
 130 #define GET_THREAD_INFO(reg,sp) \
 131         extui reg, sp, 0, 13; \
 132         xor   reg, sp, reg
 133 #endif
 134
 135
 136 /*
 137  * thread information flags
 138  * - these are process state flags that various assembly files may need to access
 139  * - pending work-to-be-done flags are in LSW
 140  * - other flags in MSW
 141  */
 142 #define TIF_SYSCALL_TRACE       0       /* syscall trace active */
 143 #define TIF_SIGPENDING          1       /* signal pending */
 144 #define TIF_NEED_RESCHED        2       /* rescheduling necessary */
 145 #define TIF_SINGLESTEP          3       /* restore singlestep on return to user mode */
 146 #define TIF_IRET                4       /* return with iret */
 147 #define TIF_MEMDIE              5
 148 #define TIF_RESTORE_SIGMASK     6       /* restore signal mask in do_signal() */
 149 #define TIF_POLLING_NRFLAG      16      /* true if poll_idle() is polling TIF_NEED_RESCHED */
 150
 151 #define _TIF_SYSCALL_TRACE      (1<<TIF_SYSCALL_TRACE)
 152 #define _TIF_SIGPENDING         (1<<TIF_SIGPENDING)
 153 #define _TIF_NEED_RESCHED       (1<<TIF_NEED_RESCHED)
 154 #define _TIF_SINGLESTEP         (1<<TIF_SINGLESTEP)
 155 #define _TIF_IRET               (1<<TIF_IRET)
 156 #define _TIF_POLLING_NRFLAG     (1<<TIF_POLLING_NRFLAG)
 157 #define _TIF_RESTORE_SIGMASK    (1<<TIF_RESTORE_SIGMASK)
 158
 159 #define _TIF_WORK_MASK          0x0000FFFE      /* work to do on interrupt/exception return */
 160 #define _TIF_ALLWORK_MASK       0x0000FFFF      /* work to do on any return to u-space */
 161
 162 /*
 163  * Thread-synchronous status.
 164  *
 165  * This is different from the flags in that nobody else
 166  * ever touches our thread-synchronous status, so we don't
 167  * have to worry about atomic accesses.
 168  */
 169 #define TS_USEDFPU              0x0001  /* FPU was used by this task this quantum (SMP) */
 170
 171 #define THREAD_SIZE 8192        //(2*PAGE_SIZE)
 172
 173 #endif  /* __KERNEL__ */
 174 #endif  /* _XTENSA_THREAD_INFO */