release/src-rt-6.x/linux/linux-2.6/include/asm-xtensa/coprocessor.h

   1 /*
   2  * include/asm-xtensa/coprocessor.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) 2003 - 2005 Tensilica Inc.
   9  */
  10
  11 #ifndef _XTENSA_COPROCESSOR_H
  12 #define _XTENSA_COPROCESSOR_H
  13
  14 #include <asm/variant/core.h>
  15 #include <asm/variant/tie.h>
  16
  17 #if !XCHAL_HAVE_CP
  18
  19 #define XTENSA_CP_EXTRA_OFFSET  0
  20 #define XTENSA_CP_EXTRA_ALIGN   1       /* must be a power of 2 */
  21 #define XTENSA_CP_EXTRA_SIZE    0
  22
  23 #else
  24
  25 #define XTOFS(last_start,last_size,align) \
  26         ((last_start+last_size+align-1) & -align)
  27
  28 #define XTENSA_CP_EXTRA_OFFSET  0
  29 #define XTENSA_CP_EXTRA_ALIGN   XCHAL_EXTRA_SA_ALIGN
  30
  31 #define XTENSA_CPE_CP0_OFFSET   \
  32         XTOFS(XTENSA_CP_EXTRA_OFFSET, XCHAL_EXTRA_SA_SIZE, XCHAL_CP0_SA_ALIGN)
  33 #define XTENSA_CPE_CP1_OFFSET   \
  34         XTOFS(XTENSA_CPE_CP0_OFFSET, XCHAL_CP0_SA_SIZE, XCHAL_CP1_SA_ALIGN)
  35 #define XTENSA_CPE_CP2_OFFSET   \
  36         XTOFS(XTENSA_CPE_CP1_OFFSET, XCHAL_CP1_SA_SIZE, XCHAL_CP2_SA_ALIGN)
  37 #define XTENSA_CPE_CP3_OFFSET   \
  38         XTOFS(XTENSA_CPE_CP2_OFFSET, XCHAL_CP2_SA_SIZE, XCHAL_CP3_SA_ALIGN)
  39 #define XTENSA_CPE_CP4_OFFSET   \
  40         XTOFS(XTENSA_CPE_CP3_OFFSET, XCHAL_CP3_SA_SIZE, XCHAL_CP4_SA_ALIGN)
  41 #define XTENSA_CPE_CP5_OFFSET   \
  42         XTOFS(XTENSA_CPE_CP4_OFFSET, XCHAL_CP4_SA_SIZE, XCHAL_CP5_SA_ALIGN)
  43 #define XTENSA_CPE_CP6_OFFSET   \
  44         XTOFS(XTENSA_CPE_CP5_OFFSET, XCHAL_CP5_SA_SIZE, XCHAL_CP6_SA_ALIGN)
  45 #define XTENSA_CPE_CP7_OFFSET   \
  46         XTOFS(XTENSA_CPE_CP6_OFFSET, XCHAL_CP6_SA_SIZE, XCHAL_CP7_SA_ALIGN)
  47 #define XTENSA_CP_EXTRA_SIZE    \
  48         XTOFS(XTENSA_CPE_CP7_OFFSET, XCHAL_CP7_SA_SIZE, 16)
  49
  50 #if XCHAL_CP_NUM > 0
  51 # ifndef __ASSEMBLY__
  52 /*
  53  * Tasks that own contents of (last user) each coprocessor.
  54  * Entries are 0 for not-owned or non-existent coprocessors.
  55  * Note: The size of this structure is fixed to 8 bytes in entry.S
  56  */
  57 typedef struct {
  58         struct task_struct *owner;      /* owner */
  59         int offset;                     /* offset in cpextra space. */
  60 } coprocessor_info_t;
  61 # else
  62 #  define COPROCESSOR_INFO_OWNER 0
  63 #  define COPROCESSOR_INFO_OFFSET 4
  64 #  define COPROCESSOR_INFO_SIZE 8
  65 # endif
  66 #endif
  67 #endif  /* XCHAL_HAVE_CP */
  68
  69
  70 #ifndef __ASSEMBLY__
  71 # if XCHAL_CP_NUM > 0
  72 struct task_struct;
  73 extern void release_coprocessors (struct task_struct*);
  74 extern void save_coprocessor_registers(void*, int);
  75 # else
  76 #  define release_coprocessors(task)
  77 # endif
  78
  79 typedef unsigned char cp_state_t[XTENSA_CP_EXTRA_SIZE]
  80         __attribute__ ((aligned (XTENSA_CP_EXTRA_ALIGN)));
  81
  82 #endif  /* !__ASSEMBLY__ */
  83
  84
  85 #endif  /* _XTENSA_COPROCESSOR_H */