1 /* Internal definitions for configurable Xtensa ISA support. 2 Copyright 2003, 2004, 2005 Free Software Foundation, Inc. 3 4 This file is part of BFD, the Binary File Descriptor library. 5 6 This program is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by 8 the Free Software Foundation; either version 2 of the License, or 9 (at your option) any later version. 10 11 This program is distributed in the hope that it will be useful, 12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 GNU General Public License for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with this program; if not, write to the Free Software 18 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ 19 20 #ifndef XTENSA_ISA_INTERNAL_H 21 #define XTENSA_ISA_INTERNAL_H 22 23 /* Flags. */ 24 25 #define XTENSA_OPERAND_IS_REGISTER 0x00000001 26 #define XTENSA_OPERAND_IS_PCRELATIVE 0x00000002 27 #define XTENSA_OPERAND_IS_INVISIBLE 0x00000004 28 #define XTENSA_OPERAND_IS_UNKNOWN 0x00000008 29 30 #define XTENSA_OPCODE_IS_BRANCH 0x00000001 31 #define XTENSA_OPCODE_IS_JUMP 0x00000002 32 #define XTENSA_OPCODE_IS_LOOP 0x00000004 33 #define XTENSA_OPCODE_IS_CALL 0x00000008 34 35 #define XTENSA_STATE_IS_EXPORTED 0x00000001 36 37 #define XTENSA_INTERFACE_HAS_SIDE_EFFECT 0x00000001 38 39 /* Function pointer typedefs */ 40 typedef void (*xtensa_format_encode_fn) (xtensa_insnbuf); 41 typedef void (*xtensa_get_slot_fn) (const xtensa_insnbuf, xtensa_insnbuf); 42 typedef void (*xtensa_set_slot_fn) (xtensa_insnbuf, const xtensa_insnbuf); 43 typedef int (*xtensa_opcode_decode_fn) (const xtensa_insnbuf); 44 typedef uint32 (*xtensa_get_field_fn) (const xtensa_insnbuf); 45 typedef void (*xtensa_set_field_fn) (xtensa_insnbuf, uint32); 46 typedef int (*xtensa_immed_decode_fn) (uint32 *); 47 typedef int (*xtensa_immed_encode_fn) (uint32 *); 48 typedef int (*xtensa_do_reloc_fn) (uint32 *, uint32); 49 typedef int (*xtensa_undo_reloc_fn) (uint32 *, uint32); 50 typedef void (*xtensa_opcode_encode_fn) (xtensa_insnbuf); 51 typedef int (*xtensa_format_decode_fn) (const xtensa_insnbuf); 52 typedef int (*xtensa_length_decode_fn) (const unsigned char *); 53 54 typedef struct xtensa_format_internal_struct 55 { 56 const char *name; /* Instruction format name. */ 57 int length; /* Instruction length in bytes. */ 58 xtensa_format_encode_fn encode_fn; 59 int num_slots; 60 int *slot_id; /* Array[num_slots] of slot IDs. */ 61 } xtensa_format_internal; 62 63 typedef struct xtensa_slot_internal_struct 64 { 65 const char *name; /* Not necessarily unique. */ 66 const char *format; 67 int position; 68 xtensa_get_slot_fn get_fn; 69 xtensa_set_slot_fn set_fn; 70 xtensa_get_field_fn *get_field_fns; /* Array[field_id]. */ 71 xtensa_set_field_fn *set_field_fns; /* Array[field_id]. */ 72 xtensa_opcode_decode_fn opcode_decode_fn; 73 const char *nop_name; 74 } xtensa_slot_internal; 75 76 typedef struct xtensa_operand_internal_struct 77 { 78 const char *name; 79 int field_id; 80 xtensa_regfile regfile; /* Register file. */ 81 int num_regs; /* Usually 1; 2 for reg pairs, etc. */ 82 uint32 flags; /* See XTENSA_OPERAND_* flags. */ 83 xtensa_immed_encode_fn encode; /* Encode the operand value. */ 84 xtensa_immed_decode_fn decode; /* Decode the value from the field. */ 85 xtensa_do_reloc_fn do_reloc; /* Perform a PC-relative reloc. */ 86 xtensa_undo_reloc_fn undo_reloc; /* Undo a PC-relative relocation. */ 87 } xtensa_operand_internal; 88 89 typedef struct xtensa_arg_internal_struct 90 { 91 union { 92 int operand_id; /* For normal operands. */ 93 xtensa_state state; /* For stateOperands. */ 94 } u; 95 char inout; /* Direction: 'i', 'o', or 'm'. */ 96 } xtensa_arg_internal; 97 98 typedef struct xtensa_iclass_internal_struct 99 { 100 int num_operands; /* Size of "operands" array. */ 101 xtensa_arg_internal *operands; /* Array[num_operands]. */ 102 103 int num_stateOperands; /* Size of "stateOperands" array. */ 104 xtensa_arg_internal *stateOperands; /* Array[num_stateOperands]. */ 105 106 int num_interfaceOperands; /* Size of "interfaceOperands". */ 107 xtensa_interface *interfaceOperands; /* Array[num_interfaceOperands]. */ 108 } xtensa_iclass_internal; 109 110 typedef struct xtensa_opcode_internal_struct 111 { 112 const char *name; /* Opcode mnemonic. */ 113 int iclass_id; /* Iclass for this opcode. */ 114 uint32 flags; /* See XTENSA_OPCODE_* flags. */ 115 xtensa_opcode_encode_fn *encode_fns; /* Array[slot_id]. */ 116 int num_funcUnit_uses; /* Number of funcUnit_use entries. */ 117 xtensa_funcUnit_use *funcUnit_uses; /* Array[num_funcUnit_uses]. */ 118 } xtensa_opcode_internal; 119 120 typedef struct xtensa_regfile_internal_struct 121 { 122 const char *name; /* Full name of the regfile. */ 123 const char *shortname; /* Abbreviated name. */ 124 xtensa_regfile parent; /* View parent (or identity). */ 125 int num_bits; /* Width of the registers. */ 126 int num_entries; /* Number of registers. */ 127 } xtensa_regfile_internal; 128 129 typedef struct xtensa_interface_internal_struct 130 { 131 const char *name; /* Interface name. */ 132 int num_bits; /* Width of the interface. */ 133 uint32 flags; /* See XTENSA_INTERFACE_* flags. */ 134 int class_id; /* Class of related interfaces. */ 135 char inout; /* "i" or "o". */ 136 } xtensa_interface_internal; 137 138 typedef struct xtensa_funcUnit_internal_struct 139 { 140 const char *name; /* Functional unit name. */ 141 int num_copies; /* Number of instances. */ 142 } xtensa_funcUnit_internal; 143 144 typedef struct xtensa_state_internal_struct 145 { 146 const char *name; /* State name. */ 147 int num_bits; /* Number of state bits. */ 148 uint32 flags; /* See XTENSA_STATE_* flags. */ 149 } xtensa_state_internal; 150 151 typedef struct xtensa_sysreg_internal_struct 152 { 153 const char *name; /* Register name. */ 154 int number; /* Register number. */ 155 int is_user; /* Non-zero if a "user register". */ 156 } xtensa_sysreg_internal; 157 158 typedef struct xtensa_lookup_entry_struct 159 { 160 const char *key; 161 union 162 { 163 xtensa_opcode opcode; /* Internal opcode number. */ 164 xtensa_sysreg sysreg; /* Internal sysreg number. */ 165 xtensa_state state; /* Internal state number. */ 166 xtensa_interface intf; /* Internal interface number. */ 167 xtensa_funcUnit fun; /* Internal funcUnit number. */ 168 } u; 169 } xtensa_lookup_entry; 170 171 typedef struct xtensa_isa_internal_struct 172 { 173 int is_big_endian; /* Endianness. */ 174 int insn_size; /* Maximum length in bytes. */ 175 int insnbuf_size; /* Number of insnbuf_words. */ 176 177 int num_formats; 178 xtensa_format_internal *formats; 179 xtensa_format_decode_fn format_decode_fn; 180 xtensa_length_decode_fn length_decode_fn; 181 182 int num_slots; 183 xtensa_slot_internal *slots; 184 185 int num_fields; 186 187 int num_operands; 188 xtensa_operand_internal *operands; 189 190 int num_iclasses; 191 xtensa_iclass_internal *iclasses; 192 193 int num_opcodes; 194 xtensa_opcode_internal *opcodes; 195 xtensa_lookup_entry *opname_lookup_table; 196 197 int num_regfiles; 198 xtensa_regfile_internal *regfiles; 199 200 int num_states; 201 xtensa_state_internal *states; 202 xtensa_lookup_entry *state_lookup_table; 203 204 int num_sysregs; 205 xtensa_sysreg_internal *sysregs; 206 xtensa_lookup_entry *sysreg_lookup_table; 207 208 /* The current Xtensa ISA only supports 256 of each kind of sysreg so 209 we can get away with implementing lookups with tables indexed by 210 the register numbers. If we ever allow larger sysreg numbers, this 211 may have to be reimplemented. The first entry in the following 212 arrays corresponds to "special" registers and the second to "user" 213 registers. */ 214 int max_sysreg_num[2]; 215 xtensa_sysreg *sysreg_table[2]; 216 217 int num_interfaces; 218 xtensa_interface_internal *interfaces; 219 xtensa_lookup_entry *interface_lookup_table; 220 221 int num_funcUnits; 222 xtensa_funcUnit_internal *funcUnits; 223 xtensa_lookup_entry *funcUnit_lookup_table; 224 225 } xtensa_isa_internal; 226 227 extern int xtensa_isa_name_compare (const void *, const void *); 228 229 extern xtensa_isa_status xtisa_errno; 230 extern char xtisa_error_msg[]; 231 232 #endif /* !XTENSA_ISA_INTERNAL_H */ 233