1 /* Target-dependent code for the Xtensa port of GDB, the GNU debugger.
3 Copyright (C) 2003, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
5 This file is part of GDB.
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
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
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.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
21 /* XTENSA_TDEP_VERSION can/should be changed along with XTENSA_CONFIG_VERSION
22 whenever the "tdep" structure changes in an incompatible way. */
24 #define XTENSA_TDEP_VERSION 0x60
26 /* Xtensa register type. */
30 xtRegisterTypeArRegfile = 1, /* Register File ar0..arXX. */
31 xtRegisterTypeSpecialReg, /* CPU states, such as PS, Booleans, (rsr). */
32 xtRegisterTypeUserReg, /* User defined registers (rur). */
33 xtRegisterTypeTieRegfile, /* User define register files. */
34 xtRegisterTypeTieState, /* TIE States (mapped on user regs). */
35 xtRegisterTypeMapped, /* Mapped on Special Registers. */
36 xtRegisterTypeUnmapped, /* Special case of masked registers. */
37 xtRegisterTypeWindow, /* Live window registers (a0..a15). */
38 xtRegisterTypeVirtual, /* PC, FP. */
40 } xtensa_register_type_t;
43 /* Xtensa register group. */
45 #define XTENSA_MAX_COPROCESSOR 0x08 /* Number of Xtensa coprocessors. */
49 xtRegisterGroupUnknown = 0,
50 xtRegisterGroupRegFile = 0x0001, /* Register files without ARx. */
51 xtRegisterGroupAddrReg = 0x0002, /* ARx. */
52 xtRegisterGroupSpecialReg = 0x0004, /* SRxx. */
53 xtRegisterGroupUserReg = 0x0008, /* URxx. */
54 xtRegisterGroupState = 0x0010, /* States. */
56 xtRegisterGroupGeneral = 0x0100, /* General registers, Ax, SR. */
57 xtRegisterGroupUser = 0x0200, /* User registers. */
58 xtRegisterGroupFloat = 0x0400, /* Floating Point. */
59 xtRegisterGroupVectra = 0x0800, /* Vectra. */
60 xtRegisterGroupSystem = 0x1000, /* System. */
62 xtRegisterGroupCP0 = 0x01000000, /* CP0. */
63 xtRegisterGroupCP1 = 0x02000000, /* CP1. */
64 xtRegisterGroupCP2 = 0x04000000, /* CP2. */
65 xtRegisterGroupCP3 = 0x08000000, /* CP3. */
66 xtRegisterGroupCP4 = 0x10000000, /* CP4. */
67 xtRegisterGroupCP5 = 0x20000000, /* CP5. */
68 xtRegisterGroupCP6 = 0x40000000, /* CP6. */
69 xtRegisterGroupCP7 = 0x80000000, /* CP7. */
71 } xtensa_register_group_t;
74 /* Xtensa target flags. */
78 xtTargetFlagsNonVisibleRegs = 0x0001,
79 xtTargetFlagsUseFetchStore = 0x0002,
80 } xtensa_target_flags_t;
83 /* Xtensa ELF core file register set representation ('.reg' section).
84 Copied from target-side ELF header <xtensa/elf.h>. */
86 typedef unsigned long xtensa_elf_greg_t;
90 xtensa_elf_greg_t xchal_config_id0;
91 xtensa_elf_greg_t xchal_config_id1;
92 xtensa_elf_greg_t cpux;
93 xtensa_elf_greg_t cpuy;
96 xtensa_elf_greg_t exccause;
97 xtensa_elf_greg_t excvaddr;
98 xtensa_elf_greg_t windowbase;
99 xtensa_elf_greg_t windowstart;
100 xtensa_elf_greg_t lbeg;
101 xtensa_elf_greg_t lend;
102 xtensa_elf_greg_t lcount;
103 xtensa_elf_greg_t sar;
104 xtensa_elf_greg_t syscall;
105 xtensa_elf_greg_t ar[0]; /* variable size (per config). */
106 } xtensa_elf_gregset_t;
121 xtensa_reg_mask_t *mask;
125 /* Xtensa register representation. */
129 char* name; /* Register name. */
130 int offset; /* Offset. */
131 xtensa_register_type_t type; /* Register type. */
132 xtensa_register_group_t group;/* Register group. */
133 struct type* ctype; /* C-type. */
134 int bit_size; /* The actual bit size in the target. */
135 int byte_size; /* Actual space allocated in registers[]. */
136 int align; /* Alignment for this register. */
138 unsigned int target_number; /* Register target number. */
140 int flags; /* Flags. */
142 const xtensa_mask_t *mask; /* Register is a compilation of other regs. */
143 const char *fetch; /* Instruction sequence to fetch register. */
144 const char *store; /* Instruction sequence to store register. */
148 #define XTENSA_REGISTER_FLAGS_PRIVILEDGED 0x0001
149 #define XTENSA_REGISTER_FLAGS_READABLE 0x0002
150 #define XTENSA_REGISTER_FLAGS_WRITABLE 0x0004
151 #define XTENSA_REGISTER_FLAGS_VOLATILE 0x0008
154 /* Call-ABI for stack frame. */
158 CallAbiDefault = 0, /* Any 'callX' instructions; default stack. */
159 CallAbiCall0Only, /* Only 'call0' instructions; flat stack. */
163 /* Xtensa-specific target dependencies. */
167 unsigned int target_flags;
169 /* Spill location for TIE register files under ocd. */
171 unsigned int spill_location;
172 unsigned int spill_size;
174 char *unused; /* Placeholder for compatibility. */
175 call_abi_t call_abi; /* Calling convention. */
177 /* CPU configuration. */
179 unsigned int debug_interrupt_level;
181 unsigned int icache_line_bytes;
182 unsigned int dcache_line_bytes;
183 unsigned int dcache_writeback;
185 unsigned int isa_use_windowed_registers;
186 unsigned int isa_use_density_instructions;
187 unsigned int isa_use_exceptions;
188 unsigned int isa_use_ext_l32r;
189 unsigned int isa_max_insn_size; /* Maximum instruction length. */
190 unsigned int debug_num_ibreaks; /* Number of IBREAKs. */
191 unsigned int debug_num_dbreaks;
195 xtensa_register_t* regmap;
197 unsigned int num_regs; /* Number of registers in regmap. */
198 unsigned int num_pseudo_regs; /* Number of pseudo registers. */
199 unsigned int num_aregs; /* Size of register file. */
200 unsigned int num_contexts;
202 int ar_base; /* Register number for AR0. */
203 int a0_base; /* Register number for A0 (pseudo). */
204 int wb_regnum; /* Register number for WB. */
205 int ws_regnum; /* Register number for WS. */
206 int pc_regnum; /* Register number for PC. */
207 int ps_regnum; /* Register number for PS. */
208 int lbeg_regnum; /* Register numbers for count regs. */
211 int sar_regnum; /* Register number of SAR. */
212 int litbase_regnum; /* Register number of LITBASE. */
214 int interrupt_regnum; /* Register number for interrupt. */
215 int interrupt2_regnum; /* Register number for interrupt2. */
216 int cpenable_regnum; /* Register number for cpenable. */
217 int debugcause_regnum; /* Register number for debugcause. */
218 int exccause_regnum; /* Register number for exccause. */
219 int excvaddr_regnum; /* Register number for excvaddr. */
221 int max_register_raw_size;
222 int max_register_virtual_size;
223 unsigned long *fp_layout; /* Layout of custom/TIE regs in 'FP' area. */
224 unsigned int fp_layout_bytes; /* Size of layout information (in bytes). */
225 unsigned long *gregmap;
231 /* We assign fixed numbers to the registers of the "current" window
232 (i.e., relative to WB). The registers get remapped via the reg_map
233 data structure to their corresponding register in the AR register
234 file (see xtensa-tdep.c). */