arch/xtensa/variants/csp/include/variant/tie-asm.h

   1 /*
   2  * tie-asm.h -- compile-time HAL assembler definitions dependent on CORE & TIE
   3  *
   4  *  NOTE:  This header file is not meant to be included directly.
   5  */
   6
   7 /* This header file contains assembly-language definitions (assembly
   8    macros, etc.) for this specific Xtensa processor's TIE extensions
   9    and options.  It is customized to this Xtensa processor configuration.
  10
  11    Copyright (c) 1999-2015 Cadence Design Systems Inc.
  12
  13    Permission is hereby granted, free of charge, to any person obtaining
  14    a copy of this software and associated documentation files (the
  15    "Software"), to deal in the Software without restriction, including
  16    without limitation the rights to use, copy, modify, merge, publish,
  17    distribute, sublicense, and/or sell copies of the Software, and to
  18    permit persons to whom the Software is furnished to do so, subject to
  19    the following conditions:
  20
  21    The above copyright notice and this permission notice shall be included
  22    in all copies or substantial portions of the Software.
  23
  24    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  25    EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  26    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  27    IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
  28    CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  29    TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  30    SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
  31
  32 #ifndef _XTENSA_CORE_TIE_ASM_H
  33 #define _XTENSA_CORE_TIE_ASM_H
  34
  35 /*  Selection parameter values for save-area save/restore macros:  */
  36 /*  Option vs. TIE:  */
  37 #define XTHAL_SAS_TIE   0x0001  /* custom extension or coprocessor */
  38 #define XTHAL_SAS_OPT   0x0002  /* optional (and not a coprocessor) */
  39 #define XTHAL_SAS_ANYOT 0x0003  /* both of the above */
  40 /*  Whether used automatically by compiler:  */
  41 #define XTHAL_SAS_NOCC  0x0004  /* not used by compiler w/o special opts/code */
  42 #define XTHAL_SAS_CC    0x0008  /* used by compiler without special opts/code */
  43 #define XTHAL_SAS_ANYCC 0x000C  /* both of the above */
  44 /*  ABI handling across function calls:  */
  45 #define XTHAL_SAS_CALR  0x0010  /* caller-saved */
  46 #define XTHAL_SAS_CALE  0x0020  /* callee-saved */
  47 #define XTHAL_SAS_GLOB  0x0040  /* global across function calls (in thread) */
  48 #define XTHAL_SAS_ANYABI        0x0070  /* all of the above three */
  49 /*  Misc  */
  50 #define XTHAL_SAS_ALL   0xFFFF  /* include all default NCP contents */
  51 #define XTHAL_SAS3(optie,ccuse,abi)     ( ((optie) & XTHAL_SAS_ANYOT)  \
  52                                         | ((ccuse) & XTHAL_SAS_ANYCC)  \
  53                                         | ((abi)   & XTHAL_SAS_ANYABI) )
  54
  55
  56     /*
  57       *  Macro to store all non-coprocessor (extra) custom TIE and optional state
  58       *  (not including zero-overhead loop registers).
  59       *  Required parameters:
  60       *      ptr         Save area pointer address register (clobbered)
  61       *                  (register must contain a 4 byte aligned address).
  62       *      at1..at4    Four temporary address registers (first XCHAL_NCP_NUM_ATMPS
  63       *                  registers are clobbered, the remaining are unused).
  64       *  Optional parameters:
  65       *      continue    If macro invoked as part of a larger store sequence, set to 1
  66       *                  if this is not the first in the sequence.  Defaults to 0.
  67       *      ofs         Offset from start of larger sequence (from value of first ptr
  68       *                  in sequence) at which to store.  Defaults to next available space
  69       *                  (or 0 if <continue> is 0).
  70       *      select      Select what category(ies) of registers to store, as a bitmask
  71       *                  (see XTHAL_SAS_xxx constants).  Defaults to all registers.
  72       *      alloc       Select what category(ies) of registers to allocate; if any
  73       *                  category is selected here that is not in <select>, space for
  74       *                  the corresponding registers is skipped without doing any store.
  75       */
  76     .macro xchal_ncp_store  ptr at1 at2 at3 at4  continue=0 ofs=-1 select=XTHAL_SAS_ALL alloc=0
  77         xchal_sa_start  \continue, \ofs
  78         // Optional global registers used by default by the compiler:
  79         .ifeq (XTHAL_SAS_OPT | XTHAL_SAS_CC | XTHAL_SAS_GLOB) & ~(\select)
  80         xchal_sa_align  \ptr, 0, 1020, 4, 4
  81         rur.THREADPTR   \at1            // threadptr option
  82         s32i    \at1, \ptr, .Lxchal_ofs_+0
  83         .set    .Lxchal_ofs_, .Lxchal_ofs_ + 4
  84         .elseif ((XTHAL_SAS_OPT | XTHAL_SAS_CC | XTHAL_SAS_GLOB) & ~(\alloc)) == 0
  85         xchal_sa_align  \ptr, 0, 1020, 4, 4
  86         .set    .Lxchal_ofs_, .Lxchal_ofs_ + 4
  87         .endif
  88         // Optional caller-saved registers used by default by the compiler:
  89         .ifeq (XTHAL_SAS_OPT | XTHAL_SAS_CC | XTHAL_SAS_CALR) & ~(\select)
  90         xchal_sa_align  \ptr, 0, 1016, 4, 4
  91         rsr.ACCLO       \at1            // MAC16 option
  92         s32i    \at1, \ptr, .Lxchal_ofs_+0
  93         rsr.ACCHI       \at1            // MAC16 option
  94         s32i    \at1, \ptr, .Lxchal_ofs_+4
  95         .set    .Lxchal_ofs_, .Lxchal_ofs_ + 8
  96         .elseif ((XTHAL_SAS_OPT | XTHAL_SAS_CC | XTHAL_SAS_CALR) & ~(\alloc)) == 0
  97         xchal_sa_align  \ptr, 0, 1016, 4, 4
  98         .set    .Lxchal_ofs_, .Lxchal_ofs_ + 8
  99         .endif
 100         // Optional caller-saved registers not used by default by the compiler:
 101         .ifeq (XTHAL_SAS_OPT | XTHAL_SAS_NOCC | XTHAL_SAS_CALR) & ~(\select)
 102         xchal_sa_align  \ptr, 0, 1000, 4, 4
 103         rsr.BR  \at1            // boolean option
 104         s32i    \at1, \ptr, .Lxchal_ofs_+0
 105         rsr.SCOMPARE1   \at1            // conditional store option
 106         s32i    \at1, \ptr, .Lxchal_ofs_+4
 107         rsr.M0  \at1            // MAC16 option
 108         s32i    \at1, \ptr, .Lxchal_ofs_+8
 109         rsr.M1  \at1            // MAC16 option
 110         s32i    \at1, \ptr, .Lxchal_ofs_+12
 111         rsr.M2  \at1            // MAC16 option
 112         s32i    \at1, \ptr, .Lxchal_ofs_+16
 113         rsr.M3  \at1            // MAC16 option
 114         s32i    \at1, \ptr, .Lxchal_ofs_+20
 115         .set    .Lxchal_ofs_, .Lxchal_ofs_ + 24
 116         .elseif ((XTHAL_SAS_OPT | XTHAL_SAS_NOCC | XTHAL_SAS_CALR) & ~(\alloc)) == 0
 117         xchal_sa_align  \ptr, 0, 1000, 4, 4
 118         .set    .Lxchal_ofs_, .Lxchal_ofs_ + 24
 119         .endif
 120     .endm       // xchal_ncp_store
 121
 122     /*
 123       *  Macro to load all non-coprocessor (extra) custom TIE and optional state
 124       *  (not including zero-overhead loop registers).
 125       *  Required parameters:
 126       *      ptr         Save area pointer address register (clobbered)
 127       *                  (register must contain a 4 byte aligned address).
 128       *      at1..at4    Four temporary address registers (first XCHAL_NCP_NUM_ATMPS
 129       *                  registers are clobbered, the remaining are unused).
 130       *  Optional parameters:
 131       *      continue    If macro invoked as part of a larger load sequence, set to 1
 132       *                  if this is not the first in the sequence.  Defaults to 0.
 133       *      ofs         Offset from start of larger sequence (from value of first ptr
 134       *                  in sequence) at which to load.  Defaults to next available space
 135       *                  (or 0 if <continue> is 0).
 136       *      select      Select what category(ies) of registers to load, as a bitmask
 137       *                  (see XTHAL_SAS_xxx constants).  Defaults to all registers.
 138       *      alloc       Select what category(ies) of registers to allocate; if any
 139       *                  category is selected here that is not in <select>, space for
 140       *                  the corresponding registers is skipped without doing any load.
 141       */
 142     .macro xchal_ncp_load  ptr at1 at2 at3 at4  continue=0 ofs=-1 select=XTHAL_SAS_ALL alloc=0
 143         xchal_sa_start  \continue, \ofs
 144         // Optional global registers used by default by the compiler:
 145         .ifeq (XTHAL_SAS_OPT | XTHAL_SAS_CC | XTHAL_SAS_GLOB) & ~(\select)
 146         xchal_sa_align  \ptr, 0, 1020, 4, 4
 147         l32i    \at1, \ptr, .Lxchal_ofs_+0
 148         wur.THREADPTR   \at1            // threadptr option
 149         .set    .Lxchal_ofs_, .Lxchal_ofs_ + 4
 150         .elseif ((XTHAL_SAS_OPT | XTHAL_SAS_CC | XTHAL_SAS_GLOB) & ~(\alloc)) == 0
 151         xchal_sa_align  \ptr, 0, 1020, 4, 4
 152         .set    .Lxchal_ofs_, .Lxchal_ofs_ + 4
 153         .endif
 154         // Optional caller-saved registers used by default by the compiler:
 155         .ifeq (XTHAL_SAS_OPT | XTHAL_SAS_CC | XTHAL_SAS_CALR) & ~(\select)
 156         xchal_sa_align  \ptr, 0, 1016, 4, 4
 157         l32i    \at1, \ptr, .Lxchal_ofs_+0
 158         wsr.ACCLO       \at1            // MAC16 option
 159         l32i    \at1, \ptr, .Lxchal_ofs_+4
 160         wsr.ACCHI       \at1            // MAC16 option
 161         .set    .Lxchal_ofs_, .Lxchal_ofs_ + 8
 162         .elseif ((XTHAL_SAS_OPT | XTHAL_SAS_CC | XTHAL_SAS_CALR) & ~(\alloc)) == 0
 163         xchal_sa_align  \ptr, 0, 1016, 4, 4
 164         .set    .Lxchal_ofs_, .Lxchal_ofs_ + 8
 165         .endif
 166         // Optional caller-saved registers not used by default by the compiler:
 167         .ifeq (XTHAL_SAS_OPT | XTHAL_SAS_NOCC | XTHAL_SAS_CALR) & ~(\select)
 168         xchal_sa_align  \ptr, 0, 1000, 4, 4
 169         l32i    \at1, \ptr, .Lxchal_ofs_+0
 170         wsr.BR  \at1            // boolean option
 171         l32i    \at1, \ptr, .Lxchal_ofs_+4
 172         wsr.SCOMPARE1   \at1            // conditional store option
 173         l32i    \at1, \ptr, .Lxchal_ofs_+8
 174         wsr.M0  \at1            // MAC16 option
 175         l32i    \at1, \ptr, .Lxchal_ofs_+12
 176         wsr.M1  \at1            // MAC16 option
 177         l32i    \at1, \ptr, .Lxchal_ofs_+16
 178         wsr.M2  \at1            // MAC16 option
 179         l32i    \at1, \ptr, .Lxchal_ofs_+20
 180         wsr.M3  \at1            // MAC16 option
 181         .set    .Lxchal_ofs_, .Lxchal_ofs_ + 24
 182         .elseif ((XTHAL_SAS_OPT | XTHAL_SAS_NOCC | XTHAL_SAS_CALR) & ~(\alloc)) == 0
 183         xchal_sa_align  \ptr, 0, 1000, 4, 4
 184         .set    .Lxchal_ofs_, .Lxchal_ofs_ + 24
 185         .endif
 186     .endm       // xchal_ncp_load
 187
 188
 189 #define XCHAL_NCP_NUM_ATMPS     1
 190
 191 #define XCHAL_SA_NUM_ATMPS      1
 192
 193 #endif /*_XTENSA_CORE_TIE_ASM_H*/
 194