[deliverable/binutils-gdb.git] / gdb / xtensa-tdep.h

/* Target-dependent code for the Xtensa port of GDB, the GNU debugger.

   Copyright (C) 2003-2016 Free Software Foundation, Inc.

   This file is part of GDB.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */


#include "arch/xtensa.h"

/* XTENSA_TDEP_VERSION can/should be changed along with XTENSA_CONFIG_VERSION
   whenever the "tdep" structure changes in an incompatible way.  */

#define XTENSA_TDEP_VERSION 0x60

/*  Xtensa register type.  */

typedef enum 
{
  xtRegisterTypeArRegfile = 1,	/* Register File ar0..arXX.  */
  xtRegisterTypeSpecialReg,	/* CPU states, such as PS, Booleans, (rsr).  */
  xtRegisterTypeUserReg,	/* User defined registers (rur).  */
  xtRegisterTypeTieRegfile,	/* User define register files.  */
  xtRegisterTypeTieState,	/* TIE States (mapped on user regs).  */
  xtRegisterTypeMapped,		/* Mapped on Special Registers.  */
  xtRegisterTypeUnmapped,	/* Special case of masked registers.  */
  xtRegisterTypeWindow,		/* Live window registers (a0..a15).  */
  xtRegisterTypeVirtual,	/* PC, FP.  */
  xtRegisterTypeUnknown
} xtensa_register_type_t;


/*  Xtensa register group.  */

#define XTENSA_MAX_COPROCESSOR	0x10  /* Number of Xtensa coprocessors.  */

typedef enum 
{
  xtRegisterGroupUnknown = 0,
  xtRegisterGroupRegFile	= 0x0001,    /* Register files without ARx.  */
  xtRegisterGroupAddrReg	= 0x0002,    /* ARx.  */
  xtRegisterGroupSpecialReg	= 0x0004,    /* SRxx.  */
  xtRegisterGroupUserReg	= 0x0008,    /* URxx.  */
  xtRegisterGroupState 		= 0x0010,    /* States.  */

  xtRegisterGroupGeneral	= 0x0100,    /* General registers, Ax, SR.  */
  xtRegisterGroupUser		= 0x0200,    /* User registers.  */
  xtRegisterGroupFloat		= 0x0400,    /* Floating Point.  */
  xtRegisterGroupVectra		= 0x0800,    /* Vectra.  */
  xtRegisterGroupSystem		= 0x1000,    /* System.  */

  xtRegisterGroupNCP	    = 0x00800000,    /* Non-CP non-base opt/custom.  */
  xtRegisterGroupCP0	    = 0x01000000,    /* CP0.  */
  xtRegisterGroupCP1	    = 0x02000000,    /* CP1.  */
  xtRegisterGroupCP2	    = 0x04000000,    /* CP2.  */
  xtRegisterGroupCP3	    = 0x08000000,    /* CP3.  */
  xtRegisterGroupCP4	    = 0x10000000,    /* CP4.  */
  xtRegisterGroupCP5	    = 0x20000000,    /* CP5.  */
  xtRegisterGroupCP6	    = 0x40000000,    /* CP6.  */
  xtRegisterGroupCP7	    = 0x80000000,    /* CP7.  */

} xtensa_register_group_t;


/*  Xtensa target flags.  */

typedef enum 
{
  xtTargetFlagsNonVisibleRegs	= 0x0001,
  xtTargetFlagsUseFetchStore	= 0x0002,
} xtensa_target_flags_t;


/*  Mask.  */

typedef struct 
{
  int reg_num;
  int bit_start;
  int bit_size;
} xtensa_reg_mask_t;

typedef struct 
{
  int count;
  xtensa_reg_mask_t *mask;
} xtensa_mask_t;


/*  Xtensa register representation.  */

typedef struct 
{
  char* name;             	/* Register name.  */
  int offset;             	/* Offset.  */
  xtensa_register_type_t type;  /* Register type.  */
  xtensa_register_group_t group;/* Register group.  */
  struct type* ctype;		/* C-type.  */
  int bit_size;  		/* The actual bit size in the target.  */
  int byte_size;          	/* Actual space allocated in registers[].  */
  int align;			/* Alignment for this register.  */

  unsigned int target_number;	/* Register target number.  */

  int flags;			/* Flags.  */
  int coprocessor;		/* Coprocessor num, -1 for non-CP, else -2.  */

  const xtensa_mask_t *mask;	/* Register is a compilation of other regs.  */
  const char *fetch;		/* Instruction sequence to fetch register.  */
  const char *store;		/* Instruction sequence to store register.  */
} xtensa_register_t;

/*  For xtensa-config.c to expand to the structure above.  */
#define XTREG(index,ofs,bsz,sz,al,tnum,flg,cp,ty,gr,name,fet,sto,mas,ct,x,y) \
       {#name, ofs, (xtensa_register_type_t) (ty), \
	((xtensa_register_group_t) \
	 ((gr) | ((xtRegisterGroupNCP >> 2) << (cp + 2)))), \
	 ct, bsz, sz, al, tnum, flg, cp, mas, fet, sto},
#define XTREG_END \
  {0, 0, (xtensa_register_type_t) 0, (xtensa_register_group_t) 0,	\
   0, 0, 0, 0, -1, 0, 0, 0, 0, 0},

#define XTENSA_REGISTER_FLAGS_PRIVILEGED	0x0001
#define XTENSA_REGISTER_FLAGS_READABLE		0x0002
#define XTENSA_REGISTER_FLAGS_WRITABLE		0x0004
#define XTENSA_REGISTER_FLAGS_VOLATILE		0x0008

/*  Call-ABI for stack frame.  */

typedef enum 
{
  CallAbiDefault = 0,		/* Any 'callX' instructions; default stack.  */
  CallAbiCall0Only,		/* Only 'call0' instructions; flat stack.  */
} call_abi_t;


struct ctype_cache
{
  struct ctype_cache *next;
  int size;
  struct type *virtual_type;
};

/*  Xtensa-specific target dependencies.  */

struct gdbarch_tdep
{
  unsigned int target_flags;

  /* Spill location for TIE register files under ocd.  */

  unsigned int spill_location;
  unsigned int spill_size;

  char *unused;				/* Placeholder for compatibility.  */
  call_abi_t call_abi;			/* Calling convention.  */

  /* CPU configuration.  */

  unsigned int debug_interrupt_level;

  unsigned int icache_line_bytes;
  unsigned int dcache_line_bytes;
  unsigned int dcache_writeback;

  unsigned int isa_use_windowed_registers;
  unsigned int isa_use_density_instructions;
  unsigned int isa_use_exceptions;
  unsigned int isa_use_ext_l32r;
  unsigned int isa_max_insn_size;	/* Maximum instruction length.  */
  unsigned int debug_num_ibreaks;	/* Number of IBREAKs.  */
  unsigned int debug_num_dbreaks;

  /* Register map.  */

  xtensa_register_t* regmap;

  unsigned int num_regs;	/* Number of registers in register map.  */
  unsigned int num_nopriv_regs;	/* Number of non-privileged registers.  */
  unsigned int num_pseudo_regs;	/* Number of pseudo registers.  */
  unsigned int num_aregs;	/* Size of register file.  */
  unsigned int num_contexts;

  int ar_base;			/* Register number for AR0.  */
  int a0_base;			/* Register number for A0 (pseudo).  */
  int wb_regnum;		/* Register number for WB.  */
  int ws_regnum;		/* Register number for WS.  */
  int pc_regnum;		/* Register number for PC.  */
  int ps_regnum;		/* Register number for PS.  */
  int lbeg_regnum;		/* Register numbers for count regs.  */
  int lend_regnum;
  int lcount_regnum;
  int sar_regnum;		/* Register number of SAR.  */
  int litbase_regnum;		/* Register number of LITBASE.  */

  int interrupt_regnum;		/* Register number for interrupt.  */
  int interrupt2_regnum;	/* Register number for interrupt2.  */
  int cpenable_regnum;		/* Register number for cpenable.  */
  int debugcause_regnum;	/* Register number for debugcause.  */
  int exccause_regnum;		/* Register number for exccause.  */
  int excvaddr_regnum;		/* Register number for excvaddr.  */

  int max_register_raw_size;
  int max_register_virtual_size;
  unsigned long *fp_layout;	/* Layout of custom/TIE regs in 'FP' area.  */
  unsigned int fp_layout_bytes;	/* Size of layout information (in bytes).  */
  unsigned long *gregmap;

  /* Cached register types.  */
  struct ctype_cache *type_entries;
};

/* Macro to instantiate a gdbarch_tdep structure.  */

#define XTENSA_GDBARCH_TDEP_INSTANTIATE(rmap,spillsz)		\
	{							\
	  .target_flags = 0,					\
	  .spill_location = -1,					\
	  .spill_size = (spillsz),				\
	  .unused = 0,						\
	  .call_abi = (XSHAL_ABI == XTHAL_ABI_CALL0		\
		       ? CallAbiCall0Only			\
		       : CallAbiDefault),			\
	  .debug_interrupt_level = XCHAL_DEBUGLEVEL,		\
	  .icache_line_bytes = XCHAL_ICACHE_LINESIZE,		\
	  .dcache_line_bytes = XCHAL_DCACHE_LINESIZE,		\
	  .dcache_writeback = XCHAL_DCACHE_IS_WRITEBACK,	\
	  .isa_use_windowed_registers = (XSHAL_ABI != XTHAL_ABI_CALL0),	\
	  .isa_use_density_instructions = XCHAL_HAVE_DENSITY,	\
	  .isa_use_exceptions = XCHAL_HAVE_EXCEPTIONS,		\
	  .isa_use_ext_l32r = XSHAL_USE_ABSOLUTE_LITERALS,	\
	  .isa_max_insn_size = XCHAL_MAX_INSTRUCTION_SIZE,	\
	  .debug_num_ibreaks = XCHAL_NUM_IBREAK,		\
	  .debug_num_dbreaks = XCHAL_NUM_DBREAK,		\
	  .regmap = rmap,			\
	  .num_regs = 0,			\
	  .num_nopriv_regs = 0,			\
	  .num_pseudo_regs = 0,			\
	  .num_aregs = XCHAL_NUM_AREGS,		\
	  .num_contexts = XCHAL_NUM_CONTEXTS,	\
	  .ar_base = -1,			\
	  .a0_base = -1,			\
	  .wb_regnum = -1,			\
	  .ws_regnum = -1,			\
	  .pc_regnum = -1,			\
	  .ps_regnum = -1,			\
	  .lbeg_regnum = -1,			\
	  .lend_regnum = -1,			\
	  .lcount_regnum = -1,			\
	  .sar_regnum = -1,			\
	  .litbase_regnum = -1,			\
	  .interrupt_regnum = -1,		\
	  .interrupt2_regnum = -1,		\
	  .cpenable_regnum = -1,		\
	  .debugcause_regnum = -1,		\
	  .exccause_regnum = -1,		\
	  .excvaddr_regnum = -1,		\
	  .max_register_raw_size = 0,		\
	  .max_register_virtual_size = 0,	\
	  .fp_layout = 0,			\
	  .fp_layout_bytes = 0,			\
	  .gregmap = 0,				\
	}
#define XTENSA_CONFIG_INSTANTIATE(rmap,spill_size)	\
	struct gdbarch_tdep xtensa_tdep = \
	  XTENSA_GDBARCH_TDEP_INSTANTIATE(rmap,spill_size);

#ifndef XCHAL_NUM_CONTEXTS
#define XCHAL_NUM_CONTEXTS	0
#endif
#ifndef XCHAL_HAVE_EXCEPTIONS
#define XCHAL_HAVE_EXCEPTIONS	1
#endif
#define WB_SHIFT	  2

/* We assign fixed numbers to the registers of the "current" window 
   (i.e., relative to WB).  The registers get remapped via the reg_map 
   data structure to their corresponding register in the AR register 
   file (see xtensa-tdep.c).  */
Commit	Line	Data
ca3bf3bd DJ	1	/* Target-dependent code for the Xtensa port of GDB, the GNU debugger.
ca3bf3bd DJ	2
618f726f	3	Copyright (C) 2003-2016 Free Software Foundation, Inc.
ca3bf3bd DJ	4
	5	This file is part of GDB.
	6
	7	This program is free software; you can redistribute it and/or modify
	8	it under the terms of the GNU General Public License as published by
a9762ec7	9	the Free Software Foundation; either version 3 of the License, or
ca3bf3bd DJ	10	(at your option) any later version.
	11
	12	This program is distributed in the hope that it will be useful,
	13	but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	GNU General Public License for more details.
	16
	17	You should have received a copy of the GNU General Public License
a9762ec7	18	along with this program. If not, see <http://www.gnu.org/licenses/>. */
ca3bf3bd DJ	19
ca3bf3bd DJ	20
40045d91 MF	21	#include "arch/xtensa.h"
40045d91 MF	22
ca3bf3bd DJ	23	/* XTENSA_TDEP_VERSION can/should be changed along with XTENSA_CONFIG_VERSION
	24	whenever the "tdep" structure changes in an incompatible way. */
	25
	26	#define XTENSA_TDEP_VERSION 0x60
	27
	28	/* Xtensa register type. */
	29
	30	typedef enum
	31	{
	32	xtRegisterTypeArRegfile = 1, /* Register File ar0..arXX. */
	33	xtRegisterTypeSpecialReg, /* CPU states, such as PS, Booleans, (rsr). */
	34	xtRegisterTypeUserReg, /* User defined registers (rur). */
	35	xtRegisterTypeTieRegfile, /* User define register files. */
	36	xtRegisterTypeTieState, /* TIE States (mapped on user regs). */
	37	xtRegisterTypeMapped, /* Mapped on Special Registers. */
	38	xtRegisterTypeUnmapped, /* Special case of masked registers. */
	39	xtRegisterTypeWindow, /* Live window registers (a0..a15). */
	40	xtRegisterTypeVirtual, /* PC, FP. */
	41	xtRegisterTypeUnknown
	42	} xtensa_register_type_t;
	43
	44
	45	/* Xtensa register group. */
	46
4d1acb11	47	#define XTENSA_MAX_COPROCESSOR 0x10 /* Number of Xtensa coprocessors. */
7b871568	48
ca3bf3bd DJ	49	typedef enum
	50	{
	51	xtRegisterGroupUnknown = 0,
	52	xtRegisterGroupRegFile = 0x0001, /* Register files without ARx. */
	53	xtRegisterGroupAddrReg = 0x0002, /* ARx. */
	54	xtRegisterGroupSpecialReg = 0x0004, /* SRxx. */
	55	xtRegisterGroupUserReg = 0x0008, /* URxx. */
	56	xtRegisterGroupState = 0x0010, /* States. */
	57
	58	xtRegisterGroupGeneral = 0x0100, /* General registers, Ax, SR. */
	59	xtRegisterGroupUser = 0x0200, /* User registers. */
	60	xtRegisterGroupFloat = 0x0400, /* Floating Point. */
	61	xtRegisterGroupVectra = 0x0800, /* Vectra. */
	62	xtRegisterGroupSystem = 0x1000, /* System. */
7b871568	63
94a0e877	64	xtRegisterGroupNCP = 0x00800000, /* Non-CP non-base opt/custom. */
7b871568 MG	65	xtRegisterGroupCP0 = 0x01000000, /* CP0. */
	66	xtRegisterGroupCP1 = 0x02000000, /* CP1. */
	67	xtRegisterGroupCP2 = 0x04000000, /* CP2. */
	68	xtRegisterGroupCP3 = 0x08000000, /* CP3. */
	69	xtRegisterGroupCP4 = 0x10000000, /* CP4. */
	70	xtRegisterGroupCP5 = 0x20000000, /* CP5. */
	71	xtRegisterGroupCP6 = 0x40000000, /* CP6. */
	72	xtRegisterGroupCP7 = 0x80000000, /* CP7. */
	73
ca3bf3bd DJ	74	} xtensa_register_group_t;
	75
	76
	77	/* Xtensa target flags. */
	78
	79	typedef enum
	80	{
	81	xtTargetFlagsNonVisibleRegs = 0x0001,
	82	xtTargetFlagsUseFetchStore = 0x0002,
	83	} xtensa_target_flags_t;
	84
	85
ca3bf3bd DJ	86	/* Mask. */
ca3bf3bd DJ	87
ff7a4c00 MG	88	typedef struct
	89	{
	90	int reg_num;
	91	int bit_start;
	92	int bit_size;
	93	} xtensa_reg_mask_t;
	94
ca3bf3bd DJ	95	typedef struct
	96	{
	97	int count;
ff7a4c00	98	xtensa_reg_mask_t *mask;
ca3bf3bd DJ	99	} xtensa_mask_t;
	100
	101
	102	/* Xtensa register representation. */
	103
	104	typedef struct
	105	{
	106	char* name; /* Register name. */
	107	int offset; /* Offset. */
	108	xtensa_register_type_t type; /* Register type. */
	109	xtensa_register_group_t group;/* Register group. */
	110	struct type* ctype; /* C-type. */
	111	int bit_size; /* The actual bit size in the target. */
	112	int byte_size; /* Actual space allocated in registers[]. */
	113	int align; /* Alignment for this register. */
	114
	115	unsigned int target_number; /* Register target number. */
	116
	117	int flags; /* Flags. */
94a0e877	118	int coprocessor; /* Coprocessor num, -1 for non-CP, else -2. */
ca3bf3bd DJ	119
	120	const xtensa_mask_t mask; / Register is a compilation of other regs. */
	121	const char fetch; / Instruction sequence to fetch register. */
	122	const char store; / Instruction sequence to store register. */
	123	} xtensa_register_t;
	124
94a0e877 MG	125	/* For xtensa-config.c to expand to the structure above. */
94a0e877 MG	126	#define XTREG(index,ofs,bsz,sz,al,tnum,flg,cp,ty,gr,name,fet,sto,mas,ct,x,y) \
60905b1e SM	127	{#name, ofs, (xtensa_register_type_t) (ty), \
	128	((xtensa_register_group_t) \
	129	((gr) \| ((xtRegisterGroupNCP >> 2) << (cp + 2)))), \
94a0e877	130	ct, bsz, sz, al, tnum, flg, cp, mas, fet, sto},
60905b1e SM	131	#define XTREG_END \
	132	{0, 0, (xtensa_register_type_t) 0, (xtensa_register_group_t) 0, \
	133	0, 0, 0, 0, -1, 0, 0, 0, 0, 0},
ca3bf3bd	134
94a0e877	135	#define XTENSA_REGISTER_FLAGS_PRIVILEGED 0x0001
ca3bf3bd DJ	136	#define XTENSA_REGISTER_FLAGS_READABLE 0x0002
	137	#define XTENSA_REGISTER_FLAGS_WRITABLE 0x0004
	138	#define XTENSA_REGISTER_FLAGS_VOLATILE 0x0008
	139
ca3bf3bd DJ	140	/* Call-ABI for stack frame. */
	141
	142	typedef enum
	143	{
	144	CallAbiDefault = 0, /* Any 'callX' instructions; default stack. */
	145	CallAbiCall0Only, /* Only 'call0' instructions; flat stack. */
	146	} call_abi_t;
	147
	148
52059ffd TT	149	struct ctype_cache
	150	{
	151	struct ctype_cache *next;
	152	int size;
	153	struct type *virtual_type;
	154	};
	155
ca3bf3bd DJ	156	/* Xtensa-specific target dependencies. */
	157
	158	struct gdbarch_tdep
	159	{
	160	unsigned int target_flags;
	161
	162	/* Spill location for TIE register files under ocd. */
	163
	164	unsigned int spill_location;
	165	unsigned int spill_size;
	166
	167	char unused; / Placeholder for compatibility. */
	168	call_abi_t call_abi; /* Calling convention. */
	169
	170	/* CPU configuration. */
	171
	172	unsigned int debug_interrupt_level;
	173
	174	unsigned int icache_line_bytes;
	175	unsigned int dcache_line_bytes;
	176	unsigned int dcache_writeback;
	177
	178	unsigned int isa_use_windowed_registers;
	179	unsigned int isa_use_density_instructions;
	180	unsigned int isa_use_exceptions;
	181	unsigned int isa_use_ext_l32r;
	182	unsigned int isa_max_insn_size; /* Maximum instruction length. */
	183	unsigned int debug_num_ibreaks; /* Number of IBREAKs. */
	184	unsigned int debug_num_dbreaks;
	185
	186	/* Register map. */
	187
	188	xtensa_register_t* regmap;
	189
94a0e877 MG	190	unsigned int num_regs; /* Number of registers in register map. */
94a0e877 MG	191	unsigned int num_nopriv_regs; /* Number of non-privileged registers. */
ca3bf3bd DJ	192	unsigned int num_pseudo_regs; /* Number of pseudo registers. */
	193	unsigned int num_aregs; /* Size of register file. */
	194	unsigned int num_contexts;
	195
	196	int ar_base; /* Register number for AR0. */
	197	int a0_base; /* Register number for A0 (pseudo). */
	198	int wb_regnum; /* Register number for WB. */
	199	int ws_regnum; /* Register number for WS. */
	200	int pc_regnum; /* Register number for PC. */
	201	int ps_regnum; /* Register number for PS. */
	202	int lbeg_regnum; /* Register numbers for count regs. */
	203	int lend_regnum;
	204	int lcount_regnum;
	205	int sar_regnum; /* Register number of SAR. */
	206	int litbase_regnum; /* Register number of LITBASE. */
	207
	208	int interrupt_regnum; /* Register number for interrupt. */
	209	int interrupt2_regnum; /* Register number for interrupt2. */
	210	int cpenable_regnum; /* Register number for cpenable. */
	211	int debugcause_regnum; /* Register number for debugcause. */
	212	int exccause_regnum; /* Register number for exccause. */
	213	int excvaddr_regnum; /* Register number for excvaddr. */
	214
	215	int max_register_raw_size;
	216	int max_register_virtual_size;
	217	unsigned long fp_layout; / Layout of custom/TIE regs in 'FP' area. */
	218	unsigned int fp_layout_bytes; /* Size of layout information (in bytes). */
	219	unsigned long *gregmap;
df4df182 UW	220
df4df182 UW	221	/* Cached register types. */
52059ffd	222	struct ctype_cache *type_entries;
ca3bf3bd DJ	223	};
ca3bf3bd DJ	224
94a0e877 MG	225	/* Macro to instantiate a gdbarch_tdep structure. */
	226
	227	#define XTENSA_GDBARCH_TDEP_INSTANTIATE(rmap,spillsz) \
	228	{ \
	229	.target_flags = 0, \
	230	.spill_location = -1, \
	231	.spill_size = (spillsz), \
	232	.unused = 0, \
90b81c5f MF	233	.call_abi = (XSHAL_ABI == XTHAL_ABI_CALL0 \
	234	? CallAbiCall0Only \
	235	: CallAbiDefault), \
94a0e877 MG	236	.debug_interrupt_level = XCHAL_DEBUGLEVEL, \
	237	.icache_line_bytes = XCHAL_ICACHE_LINESIZE, \
	238	.dcache_line_bytes = XCHAL_DCACHE_LINESIZE, \
	239	.dcache_writeback = XCHAL_DCACHE_IS_WRITEBACK, \
	240	.isa_use_windowed_registers = (XSHAL_ABI != XTHAL_ABI_CALL0), \
	241	.isa_use_density_instructions = XCHAL_HAVE_DENSITY, \
	242	.isa_use_exceptions = XCHAL_HAVE_EXCEPTIONS, \
	243	.isa_use_ext_l32r = XSHAL_USE_ABSOLUTE_LITERALS, \
	244	.isa_max_insn_size = XCHAL_MAX_INSTRUCTION_SIZE, \
	245	.debug_num_ibreaks = XCHAL_NUM_IBREAK, \
	246	.debug_num_dbreaks = XCHAL_NUM_DBREAK, \
	247	.regmap = rmap, \
	248	.num_regs = 0, \
	249	.num_nopriv_regs = 0, \
	250	.num_pseudo_regs = 0, \
	251	.num_aregs = XCHAL_NUM_AREGS, \
	252	.num_contexts = XCHAL_NUM_CONTEXTS, \
	253	.ar_base = -1, \
	254	.a0_base = -1, \
	255	.wb_regnum = -1, \
	256	.ws_regnum = -1, \
	257	.pc_regnum = -1, \
	258	.ps_regnum = -1, \
	259	.lbeg_regnum = -1, \
	260	.lend_regnum = -1, \
	261	.lcount_regnum = -1, \
	262	.sar_regnum = -1, \
	263	.litbase_regnum = -1, \
	264	.interrupt_regnum = -1, \
	265	.interrupt2_regnum = -1, \
	266	.cpenable_regnum = -1, \
	267	.debugcause_regnum = -1, \
	268	.exccause_regnum = -1, \
	269	.excvaddr_regnum = -1, \
	270	.max_register_raw_size = 0, \
	271	.max_register_virtual_size = 0, \
	272	.fp_layout = 0, \
	273	.fp_layout_bytes = 0, \
	274	.gregmap = 0, \
	275	}
	276	#define XTENSA_CONFIG_INSTANTIATE(rmap,spill_size) \
	277	struct gdbarch_tdep xtensa_tdep = \
	278	XTENSA_GDBARCH_TDEP_INSTANTIATE(rmap,spill_size);
	279
	280	#ifndef XCHAL_NUM_CONTEXTS
	281	#define XCHAL_NUM_CONTEXTS 0
	282	#endif
	283	#ifndef XCHAL_HAVE_EXCEPTIONS
	284	#define XCHAL_HAVE_EXCEPTIONS 1
	285	#endif
ca3bf3bd DJ	286	#define WB_SHIFT 2
	287
	288	/* We assign fixed numbers to the registers of the "current" window
	289	(i.e., relative to WB). The registers get remapped via the reg_map
	290	data structure to their corresponding register in the AR register
	291	file (see xtensa-tdep.c). */
	292