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 <xtensa/config/core.h>
  15
  16 #define XTOFS(last_start,last_size,align) \
  17         ((last_start+last_size+align-1) & -align)
  18
  19 #define XTENSA_CP_EXTRA_OFFSET  0
  20 #define XTENSA_CP_EXTRA_ALIGN   XCHAL_EXTRA_SA_ALIGN
  21
  22 #define XTENSA_CPE_CP0_OFFSET   \
  23         XTOFS(XTENSA_CP_EXTRA_OFFSET, XCHAL_EXTRA_SA_SIZE, XCHAL_CP0_SA_ALIGN)
  24 #define XTENSA_CPE_CP1_OFFSET   \
  25         XTOFS(XTENSA_CPE_CP0_OFFSET, XCHAL_CP0_SA_SIZE, XCHAL_CP1_SA_ALIGN)
  26 #define XTENSA_CPE_CP2_OFFSET   \
  27         XTOFS(XTENSA_CPE_CP1_OFFSET, XCHAL_CP1_SA_SIZE, XCHAL_CP2_SA_ALIGN)
  28 #define XTENSA_CPE_CP3_OFFSET   \
  29         XTOFS(XTENSA_CPE_CP2_OFFSET, XCHAL_CP2_SA_SIZE, XCHAL_CP3_SA_ALIGN)
  30 #define XTENSA_CPE_CP4_OFFSET   \
  31         XTOFS(XTENSA_CPE_CP3_OFFSET, XCHAL_CP3_SA_SIZE, XCHAL_CP4_SA_ALIGN)
  32 #define XTENSA_CPE_CP5_OFFSET   \
  33         XTOFS(XTENSA_CPE_CP4_OFFSET, XCHAL_CP4_SA_SIZE, XCHAL_CP5_SA_ALIGN)
  34 #define XTENSA_CPE_CP6_OFFSET   \
  35         XTOFS(XTENSA_CPE_CP5_OFFSET, XCHAL_CP5_SA_SIZE, XCHAL_CP6_SA_ALIGN)
  36 #define XTENSA_CPE_CP7_OFFSET   \
  37         XTOFS(XTENSA_CPE_CP6_OFFSET, XCHAL_CP6_SA_SIZE, XCHAL_CP7_SA_ALIGN)
  38 #define XTENSA_CP_EXTRA_SIZE    \
  39         XTOFS(XTENSA_CPE_CP7_OFFSET, XCHAL_CP7_SA_SIZE, 16)
  40
  41 #if XCHAL_CP_NUM > 0
  42 # ifndef __ASSEMBLY__
  43 /*
  44  * Tasks that own contents of (last user) each coprocessor.
  45  * Entries are 0 for not-owned or non-existent coprocessors.
  46  * Note: The size of this structure is fixed to 8 bytes in entry.S
  47  */
  48 typedef struct {
  49         struct task_struct *owner;      /* owner */
  50         int offset;                     /* offset in cpextra space. */
  51 } coprocessor_info_t;
  52 # else
  53 #  define COPROCESSOR_INFO_OWNER 0
  54 #  define COPROCESSOR_INFO_OFFSET 4
  55 #  define COPROCESSOR_INFO_SIZE 8
  56 # endif
  57 #endif
  58
  59
  60 #ifndef __ASSEMBLY__
  61 # if XCHAL_CP_NUM > 0
  62 struct task_struct;
  63 extern void release_coprocessors (struct task_struct*);
  64 extern void save_coprocessor_registers(void*, int);
  65 # else
  66 #  define release_coprocessors(task)
  67 # endif
  68 #endif
  69
  70 #endif  /* _XTENSA_COPROCESSOR_H */