| 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 */ |