arch/xtensa/variants/dc232b/include/variant/tie.h

   1 /*
   2  * This header file describes this specific Xtensa processor's TIE extensions
   3  * that extend basic Xtensa core functionality.  It is customized to this
   4  * Xtensa processor configuration.
   5  *
   6  * This file is subject to the terms and conditions of the GNU General Public
   7  * License.  See the file "COPYING" in the main directory of this archive
   8  * for more details.
   9  *
  10  * Copyright (C) 1999-2007 Tensilica Inc.
  11  */
  12
  13 #ifndef _XTENSA_CORE_TIE_H
  14 #define _XTENSA_CORE_TIE_H
  15
  16 #define XCHAL_CP_NUM                    1       /* number of coprocessors */
  17 #define XCHAL_CP_MAX                    8       /* max CP ID + 1 (0 if none) */
  18 #define XCHAL_CP_MASK                   0x80    /* bitmask of all CPs by ID */
  19 #define XCHAL_CP_PORT_MASK              0x80    /* bitmask of only port CPs */
  20
  21 /*  Basic parameters of each coprocessor:  */
  22 #define XCHAL_CP7_NAME                  "XTIOP"
  23 #define XCHAL_CP7_IDENT                 XTIOP
  24 #define XCHAL_CP7_SA_SIZE               0       /* size of state save area */
  25 #define XCHAL_CP7_SA_ALIGN              1       /* min alignment of save area */
  26 #define XCHAL_CP_ID_XTIOP               7       /* coprocessor ID (0..7) */
  27
  28 /*  Filler info for unassigned coprocessors, to simplify arrays etc:  */
  29 #define XCHAL_CP0_SA_SIZE               0
  30 #define XCHAL_CP0_SA_ALIGN              1
  31 #define XCHAL_CP1_SA_SIZE               0
  32 #define XCHAL_CP1_SA_ALIGN              1
  33 #define XCHAL_CP2_SA_SIZE               0
  34 #define XCHAL_CP2_SA_ALIGN              1
  35 #define XCHAL_CP3_SA_SIZE               0
  36 #define XCHAL_CP3_SA_ALIGN              1
  37 #define XCHAL_CP4_SA_SIZE               0
  38 #define XCHAL_CP4_SA_ALIGN              1
  39 #define XCHAL_CP5_SA_SIZE               0
  40 #define XCHAL_CP5_SA_ALIGN              1
  41 #define XCHAL_CP6_SA_SIZE               0
  42 #define XCHAL_CP6_SA_ALIGN              1
  43
  44 /*  Save area for non-coprocessor optional and custom (TIE) state:  */
  45 #define XCHAL_NCP_SA_SIZE               32
  46 #define XCHAL_NCP_SA_ALIGN              4
  47
  48 /*  Total save area for optional and custom state (NCP + CPn):  */
  49 #define XCHAL_TOTAL_SA_SIZE             32      /* with 16-byte align padding */
  50 #define XCHAL_TOTAL_SA_ALIGN            4       /* actual minimum alignment */
  51
  52 /*
  53  * Detailed contents of save areas.
  54  * NOTE:  caller must define the XCHAL_SA_REG macro (not defined here)
  55  * before expanding the XCHAL_xxx_SA_LIST() macros.
  56  *
  57  * XCHAL_SA_REG(s,ccused,abikind,kind,opt,name,galign,align,asize,
  58  *              dbnum,base,regnum,bitsz,gapsz,reset,x...)
  59  *
  60  *      s = passed from XCHAL_*_LIST(s), eg. to select how to expand
  61  *      ccused = set if used by compiler without special options or code
  62  *      abikind = 0 (caller-saved), 1 (callee-saved), or 2 (thread-global)
  63  *      kind = 0 (special reg), 1 (TIE user reg), or 2 (TIE regfile reg)
  64  *      opt = 0 (custom TIE extension or coprocessor), or 1 (optional reg)
  65  *      name = lowercase reg name (no quotes)
  66  *      galign = group byte alignment (power of 2) (galign >= align)
  67  *      align = register byte alignment (power of 2)
  68  *      asize = allocated size in bytes (asize*8 == bitsz + gapsz + padsz)
  69  *        (not including any pad bytes required to galign this or next reg)
  70  *      dbnum = unique target number f/debug (see <xtensa-libdb-macros.h>)
  71  *      base = reg shortname w/o index (or sr=special, ur=TIE user reg)
  72  *      regnum = reg index in regfile, or special/TIE-user reg number
  73  *      bitsz = number of significant bits (regfile width, or ur/sr mask bits)
  74  *      gapsz = intervening bits, if bitsz bits not stored contiguously
  75  *      (padsz = pad bits at end [TIE regfile] or at msbits [ur,sr] of asize)
  76  *      reset = register reset value (or 0 if undefined at reset)
  77  *      x = reserved for future use (0 until then)
  78  *
  79  *  To filter out certain registers, e.g. to expand only the non-global
  80  *  registers used by the compiler, you can do something like this:
  81  *
  82  *  #define XCHAL_SA_REG(s,ccused,p...) SELCC##ccused(p)
  83  *  #define SELCC0(p...)
  84  *  #define SELCC1(abikind,p...)        SELAK##abikind(p)
  85  *  #define SELAK0(p...)                REG(p)
  86  *  #define SELAK1(p...)                REG(p)
  87  *  #define SELAK2(p...)
  88  *  #define REG(kind,tie,name,galn,aln,asz,csz,dbnum,base,rnum,bsz,rst,x...) \
  89  *              ...what you want to expand...
  90  */
  91
  92 #define XCHAL_NCP_SA_NUM        8
  93 #define XCHAL_NCP_SA_LIST(s)    \
  94  XCHAL_SA_REG(s,1,0,0,1,          acclo, 4, 4, 4,0x0210,  sr,16 , 32,0,0,0) \
  95  XCHAL_SA_REG(s,1,0,0,1,          acchi, 4, 4, 4,0x0211,  sr,17 ,  8,0,0,0) \
  96  XCHAL_SA_REG(s,0,0,0,1,             m0, 4, 4, 4,0x0220,  sr,32 , 32,0,0,0) \
  97  XCHAL_SA_REG(s,0,0,0,1,             m1, 4, 4, 4,0x0221,  sr,33 , 32,0,0,0) \
  98  XCHAL_SA_REG(s,0,0,0,1,             m2, 4, 4, 4,0x0222,  sr,34 , 32,0,0,0) \
  99  XCHAL_SA_REG(s,0,0,0,1,             m3, 4, 4, 4,0x0223,  sr,35 , 32,0,0,0) \
 100  XCHAL_SA_REG(s,0,0,0,1,      scompare1, 4, 4, 4,0x020C,  sr,12 , 32,0,0,0) \
 101  XCHAL_SA_REG(s,1,2,1,1,      threadptr, 4, 4, 4,0x03E7,  ur,231, 32,0,0,0)
 102
 103 #define XCHAL_CP0_SA_NUM        0
 104 #define XCHAL_CP0_SA_LIST(s)    /* empty */
 105
 106 #define XCHAL_CP1_SA_NUM        0
 107 #define XCHAL_CP1_SA_LIST(s)    /* empty */
 108
 109 #define XCHAL_CP2_SA_NUM        0
 110 #define XCHAL_CP2_SA_LIST(s)    /* empty */
 111
 112 #define XCHAL_CP3_SA_NUM        0
 113 #define XCHAL_CP3_SA_LIST(s)    /* empty */
 114
 115 #define XCHAL_CP4_SA_NUM        0
 116 #define XCHAL_CP4_SA_LIST(s)    /* empty */
 117
 118 #define XCHAL_CP5_SA_NUM        0
 119 #define XCHAL_CP5_SA_LIST(s)    /* empty */
 120
 121 #define XCHAL_CP6_SA_NUM        0
 122 #define XCHAL_CP6_SA_LIST(s)    /* empty */
 123
 124 #define XCHAL_CP7_SA_NUM        0
 125 #define XCHAL_CP7_SA_LIST(s)    /* empty */
 126
 127 /* Byte length of instruction from its first nibble (op0 field), per FLIX.  */
 128 #define XCHAL_OP0_FORMAT_LENGTHS        3,3,3,3,3,3,3,3,2,2,2,2,2,2,3,3
 129
 130 #endif /*_XTENSA_CORE_TIE_H*/
 131