old-cross-binutils/gdb/xtensa-tdep.h

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/* Target-dependent code for the Xtensa port of GDB, the GNU debugger.
2007-01-09 17:59:20 +00:00
Copyright (C) 2003, 2005, 2006, 2007 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 2 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, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA. */
/* 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. */
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. */
} xtensa_register_group_t;
/* Xtensa target flags. */
typedef enum
{
xtTargetFlagsNonVisibleRegs = 0x0001,
xtTargetFlagsUseFetchStore = 0x0002,
} xtensa_target_flags_t;
/* Xtensa ELF core file register set representation ('.reg' section).
Copied from target-side ELF header <xtensa/elf.h>. */
typedef unsigned long xtensa_elf_greg_t;
typedef struct
{
xtensa_elf_greg_t xchal_config_id0;
xtensa_elf_greg_t xchal_config_id1;
xtensa_elf_greg_t cpux;
xtensa_elf_greg_t cpuy;
xtensa_elf_greg_t pc;
xtensa_elf_greg_t ps;
xtensa_elf_greg_t exccause;
xtensa_elf_greg_t excvaddr;
xtensa_elf_greg_t windowbase;
xtensa_elf_greg_t windowstart;
xtensa_elf_greg_t lbeg;
xtensa_elf_greg_t lend;
xtensa_elf_greg_t lcount;
xtensa_elf_greg_t sar;
xtensa_elf_greg_t syscall;
xtensa_elf_greg_t ar[0]; /* variable size (per config). */
} xtensa_elf_gregset_t;
#define SIZEOF_GREGSET (sizeof (xtensa_elf_gregset_t) + NUM_AREGS * 4)
#define XTENSA_ELF_NGREG (SIZEOF_GREGSET / sizeof(xtensa_elf_greg_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. */
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;
#define XTENSA_REGISTER_FLAGS_PRIVILEDGED 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;
/* 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 regmap. */
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;
};
/* Define macros to access some of the gdbarch entries. */
#define XTENSA_TARGET_FLAGS \
(gdbarch_tdep (current_gdbarch)->target_flags)
#define SPILL_LOCATION \
(gdbarch_tdep (current_gdbarch)->spill_location)
#define SPILL_SIZE \
(gdbarch_tdep (current_gdbarch)->spill_size)
#define CALL_ABI \
(gdbarch_tdep (current_gdbarch)->call_abi)
#define ISA_USE_WINDOWED_REGISTERS \
(gdbarch_tdep (current_gdbarch)->isa_use_windowed_registers)
#define ISA_USE_DENSITY_INSTRUCTIONS \
(gdbarch_tdep (current_gdbarch)->isa_use_density_instructions)
#define ISA_USE_EXCEPTIONS \
(gdbarch_tdep (current_gdbarch)->isa_use_exceptions)
#define ISA_USE_EXT_L32R \
(gdbarch_tdep (current_gdbarch)->isa_use_ext_l32r)
#define DEBUG_DATA_VADDR_TRAP_COUNT \
(gdbarch_tdep (current_gdbarch)->debug_data_vaddr_trap_count)
#define DEBUG_INST_VADDR_TRAP_COUNT \
(gdbarch_tdep (current_gdbarch)->debug_inst_vaddr_trap_count)
#define ISA_MAX_INSN_SIZE \
(gdbarch_tdep (current_gdbarch)->isa_max_insn_size)
#define DEBUG_NUM_IBREAKS \
(gdbarch_tdep (current_gdbarch)->debug_num_ibreaks)
#define DEBUG_NUM_DBREAKS \
(gdbarch_tdep (current_gdbarch)->debug_num_dbreaks)
#define NUM_AREGS (gdbarch_tdep (current_gdbarch)->num_aregs)
#define WB_REGNUM (gdbarch_tdep (current_gdbarch)->wb_regnum)
#define WS_REGNUM (gdbarch_tdep (current_gdbarch)->ws_regnum)
#define LBEG_REGNUM (gdbarch_tdep (current_gdbarch)->lbeg_regnum)
#define LEND_REGNUM (gdbarch_tdep (current_gdbarch)->lend_regnum)
#define LCOUNT_REGNUM (gdbarch_tdep (current_gdbarch)->lcount_regnum)
#define SAR_REGNUM (gdbarch_tdep (current_gdbarch)->sar_regnum)
#define REGMAP (gdbarch_tdep (current_gdbarch)->regmap)
#define LITBASE_REGNUM (gdbarch_tdep (current_gdbarch)->litbase_regnum)
#define DEBUGCAUSE_REGNUM (gdbarch_tdep (current_gdbarch)->debugcause_regnum)
#define EXCCAUSE_REGNUM (gdbarch_tdep (current_gdbarch)->exccause_regnum)
#define EXCVADDR_REGNUM (gdbarch_tdep (current_gdbarch)->excvaddr_regnum)
#define NUM_IBREAKS (gdbarch_tdep (current_gdbarch)->num_ibreaks)
#define REGMAP_BYTES (gdbarch_tdep (current_gdbarch)->regmap_bytes)
#define A0_BASE (gdbarch_tdep (current_gdbarch)->a0_base)
#define AR_BASE (gdbarch_tdep (current_gdbarch)->ar_base)
#define FP_ALIAS (NUM_REGS + NUM_PSEUDO_REGS)
#define CALL_ABI (gdbarch_tdep (current_gdbarch)->call_abi)
#define NUM_CONTEXTS (gdbarch_tdep (current_gdbarch)->num_contexts)
#define FP_LAYOUT (gdbarch_tdep (current_gdbarch)->fp_layout)
#define FP_LAYOUT_BYTES (gdbarch_tdep (current_gdbarch)->fp_layout_bytes)
#define GREGMAP (gdbarch_tdep (current_gdbarch)->gregmap)
#define AREGS_MASK (NUM_AREGS - 1)
#define WB_MASK (AREGS_MASK >> 2)
#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). */
#define A0_REGNUM (A0_BASE + 0)
#define A1_REGNUM (A0_BASE + 1)
#define A2_REGNUM (A0_BASE + 2)
#define A3_REGNUM (A0_BASE + 3)
#define A4_REGNUM (A0_BASE + 4)
#define A5_REGNUM (A0_BASE + 5)
#define A6_REGNUM (A0_BASE + 6)
#define A7_REGNUM (A0_BASE + 7)
#define A8_REGNUM (A0_BASE + 8)
#define A9_REGNUM (A0_BASE + 9)
#define A10_REGNUM (A0_BASE + 10)
#define A11_REGNUM (A0_BASE + 11)
#define A12_REGNUM (A0_BASE + 12)
#define A13_REGNUM (A0_BASE + 13)
#define A14_REGNUM (A0_BASE + 14)
#define A15_REGNUM (A0_BASE + 15)