nuttx/arch/xtensa/include/esp32s2/tie.h

/****************************************************************************
 * arch/xtensa/include/esp32s2/tie.h
 * Compile-time HAL definitions dependent on CORE & TIE configuration
 *
 *  NOTE:  This header file is not meant to be included directly.
 *
 * This header file describes this specific Xtensa processor's TIE extensions
 * that extend basic Xtensa core functionality.  It is customized to this
 * Xtensa processor configuration.
 *
 * Copyright (c) 1999-2018 Cadence Design Systems Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
 * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

#ifndef _ARCH_XTENSA_INCLUDE_ESP32S2_TIE_H
#define _ARCH_XTENSA_INCLUDE_ESP32S2_TIE_H

/****************************************************************************
 * Pre-processor Definitions
 ****************************************************************************/

#define XCHAL_CP_NUM           0       /* number of coprocessors */
#define XCHAL_CP_MAX           0       /* max CP ID + 1 (0 if none) */
#define XCHAL_CP_MASK          0x00    /* bitmask of all CPs by ID */
#define XCHAL_CP_PORT_MASK     0x00    /* bitmask of only port CPs */

/*  Save area for non-coprocessor optional and custom (TIE) state:  */

#define XCHAL_NCP_SA_SIZE       4
#define XCHAL_NCP_SA_ALIGN      4

/*  Total save area for optional and custom state (NCP + CPn):  */

#define XCHAL_TOTAL_SA_SIZE     16  /* with 16-byte align padding */
#define XCHAL_TOTAL_SA_ALIGN    4   /* actual minimum alignment */

/* Detailed contents of save areas.
 * NOTE:  caller must define the XCHAL_SA_REG macro (not defined here)
 * before expanding the XCHAL_xxx_SA_LIST() macros.
 *
 * XCHAL_SA_REG(s,ccused,abikind,kind,opt,name,galign,align,asize,
 *     dbnum,base,regnum,bitsz,gapsz,reset,x...)
 *
 *  s = passed from XCHAL_*_LIST(s), eg. to select how to expand
 *  ccused = set if used by compiler without special options or code
 *  abikind = 0 (caller-saved), 1 (callee-saved), or 2 (thread-global)
 *  kind = 0 (special reg), 1 (TIE user reg), or 2 (TIE regfile reg)
 *  opt = 0 (custom TIE extension or coprocessor), or 1 (optional reg)
 *  name = lowercase reg name (no quotes)
 *  galign = group byte alignment (power of 2) (galign >= align)
 *  align = register byte alignment (power of 2)
 *  asize = allocated size in bytes (asize*8 == bitsz + gapsz + padsz)
 *    (not including any pad bytes required to galign this or next reg)
 *  dbnum = unique target number f/debug (see <xtensa-libdb-macros.h>)
 *  base = reg shortname w/o index (or sr=special, ur=TIE user reg)
 *  regnum = reg index in regfile, or special/TIE-user reg number
 *  bitsz = number of significant bits (regfile width, or ur/sr mask bits)
 *  gapsz = intervening bits, if bitsz bits not stored contiguously
 *  (padsz = pad bits at end [TIE regfile] or at msbits [ur,sr] of asize)
 *  reset = register reset value (or 0 if undefined at reset)
 *  x = reserved for future use (0 until then)
 *
 *  To filter out certain registers, e.g. to expand only the non-global
 *  registers used by the compiler, you can do something like this:
 *
 *  #define XCHAL_SA_REG(s,ccused,p...)  SELCC##ccused(p)
 *  #define SELCC0(p...)
 *  #define SELCC1(abikind,p...)  SELAK##abikind(p)
 *  #define SELAK0(p...)    REG(p)
 *  #define SELAK1(p...)    REG(p)
 *  #define SELAK2(p...)
 *  #define REG(kind,tie,name,galn,aln,asz,csz,dbnum,base,rnum,bsz,rst,x...)\
 *     ...what you want to expand...
 */

#define XCHAL_NCP_SA_NUM    1
#define XCHAL_NCP_SA_LIST(s)    \
 XCHAL_SA_REG(s,1,2,1,1,      threadptr, 4, 4, 4,0x03E7,  ur,231, 32,0,0,0)

#define XCHAL_CP0_SA_NUM    0
#define XCHAL_CP0_SA_LIST(s)    /* empty */

#define XCHAL_CP1_SA_NUM    0
#define XCHAL_CP1_SA_LIST(s)    /* empty */

#define XCHAL_CP2_SA_NUM    0
#define XCHAL_CP2_SA_LIST(s)    /* empty */

#define XCHAL_CP3_SA_NUM    0
#define XCHAL_CP3_SA_LIST(s)    /* empty */

#define XCHAL_CP4_SA_NUM    0
#define XCHAL_CP4_SA_LIST(s)    /* empty */

#define XCHAL_CP5_SA_NUM    0
#define XCHAL_CP5_SA_LIST(s)    /* empty */

#define XCHAL_CP6_SA_NUM    0
#define XCHAL_CP6_SA_LIST(s)    /* empty */

#define XCHAL_CP7_SA_NUM    0
#define XCHAL_CP7_SA_LIST(s)    /* empty */

/* Byte length of instruction from its first nibble (op0 field), per FLIX.  */

#define XCHAL_OP0_FORMAT_LENGTHS    3,3,3,3,3,3,3,3,2,2,2,2,2,2,3,3

/* Byte length of instruction from its first byte, per FLIX.  */

#define XCHAL_BYTE0_FORMAT_LENGTHS  \
  3,3,3,3,3,3,3,3,2,2,2,2,2,2,3,3, 3,3,3,3,3,3,3,3,2,2,2,2,2,2,3,3,\
  3,3,3,3,3,3,3,3,2,2,2,2,2,2,3,3, 3,3,3,3,3,3,3,3,2,2,2,2,2,2,3,3,\
  3,3,3,3,3,3,3,3,2,2,2,2,2,2,3,3, 3,3,3,3,3,3,3,3,2,2,2,2,2,2,3,3,\
  3,3,3,3,3,3,3,3,2,2,2,2,2,2,3,3, 3,3,3,3,3,3,3,3,2,2,2,2,2,2,3,3,\
  3,3,3,3,3,3,3,3,2,2,2,2,2,2,3,3, 3,3,3,3,3,3,3,3,2,2,2,2,2,2,3,3,\
  3,3,3,3,3,3,3,3,2,2,2,2,2,2,3,3, 3,3,3,3,3,3,3,3,2,2,2,2,2,2,3,3,\
  3,3,3,3,3,3,3,3,2,2,2,2,2,2,3,3, 3,3,3,3,3,3,3,3,2,2,2,2,2,2,3,3,\
  3,3,3,3,3,3,3,3,2,2,2,2,2,2,3,3, 3,3,3,3,3,3,3,3,2,2,2,2,2,2,3,3

#endif /* _ARCH_XTENSA_INCLUDE_ESP32S2_TIE_H */