| 1 | /* Internal definitions for configurable Xtensa ISA support. |
| 2 | Copyright 2003 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| 19 | |
| 20 | /* Use the statically-linked version for the GNU tools. */ |
| 21 | #define STATIC_LIBISA 1 |
| 22 | |
| 23 | #define ISA_INTERFACE_VERSION 3 |
| 24 | |
| 25 | struct config_struct |
| 26 | { |
| 27 | char *param_name; |
| 28 | char *param_value; |
| 29 | }; |
| 30 | |
| 31 | /* Encode/decode function types for immediate operands. */ |
| 32 | typedef uint32 (*xtensa_immed_decode_fn) (uint32); |
| 33 | typedef xtensa_encode_result (*xtensa_immed_encode_fn) (uint32 *); |
| 34 | |
| 35 | /* Field accessor function types. */ |
| 36 | typedef uint32 (*xtensa_get_field_fn) (const xtensa_insnbuf); |
| 37 | typedef void (*xtensa_set_field_fn) (xtensa_insnbuf, uint32); |
| 38 | |
| 39 | /* PC-relative relocation function types. */ |
| 40 | typedef uint32 (*xtensa_do_reloc_fn) (uint32, uint32); |
| 41 | typedef uint32 (*xtensa_undo_reloc_fn) (uint32, uint32); |
| 42 | |
| 43 | /* Instruction decode function type. */ |
| 44 | typedef int (*xtensa_insn_decode_fn) (const xtensa_insnbuf); |
| 45 | |
| 46 | /* Instruction encoding template function type (each of these functions |
| 47 | returns a constant template; they exist only to make it easier for the |
| 48 | TIE compiler to generate endian-independent DLLs). */ |
| 49 | typedef xtensa_insnbuf (*xtensa_encoding_template_fn) (void); |
| 50 | |
| 51 | |
| 52 | typedef struct xtensa_operand_internal_struct |
| 53 | { |
| 54 | char *operand_kind; /* e.g., "a", "f", "i", "l".... */ |
| 55 | char inout; /* '<', '>', or '='. */ |
| 56 | char isPCRelative; /* Is this a PC-relative offset? */ |
| 57 | xtensa_get_field_fn get_field; /* Get encoded value of the field. */ |
| 58 | xtensa_set_field_fn set_field; /* Set field with an encoded value. */ |
| 59 | xtensa_immed_encode_fn encode; /* Encode the operand value. */ |
| 60 | xtensa_immed_decode_fn decode; /* Decode the value from the field. */ |
| 61 | xtensa_do_reloc_fn do_reloc; /* Perform a PC-relative relocation. */ |
| 62 | xtensa_undo_reloc_fn undo_reloc; /* Undo a PC-relative relocation. */ |
| 63 | } xtensa_operand_internal; |
| 64 | |
| 65 | |
| 66 | typedef struct xtensa_iclass_internal_struct |
| 67 | { |
| 68 | int num_operands; /* Size of "operands" array. */ |
| 69 | xtensa_operand_internal **operands; /* Array of operand structures. */ |
| 70 | } xtensa_iclass_internal; |
| 71 | |
| 72 | |
| 73 | typedef struct xtensa_opcode_internal_struct |
| 74 | { |
| 75 | const char *name; /* Opcode mnemonic. */ |
| 76 | int length; /* Length in bytes of the insn. */ |
| 77 | xtensa_encoding_template_fn template; /* Fn returning encoding template. */ |
| 78 | xtensa_iclass_internal *iclass; /* Iclass for this opcode. */ |
| 79 | } xtensa_opcode_internal; |
| 80 | |
| 81 | |
| 82 | typedef struct opname_lookup_entry_struct |
| 83 | { |
| 84 | const char *key; /* Opcode mnemonic. */ |
| 85 | xtensa_opcode opcode; /* Internal opcode number. */ |
| 86 | } opname_lookup_entry; |
| 87 | |
| 88 | |
| 89 | typedef struct xtensa_isa_internal_struct |
| 90 | { |
| 91 | int is_big_endian; /* Endianness. */ |
| 92 | int insn_size; /* Maximum length in bytes. */ |
| 93 | int insnbuf_size; /* Number of insnbuf_words. */ |
| 94 | int num_opcodes; /* Total number for all modules. */ |
| 95 | xtensa_opcode_internal **opcode_table;/* Indexed by internal opcode #. */ |
| 96 | int num_modules; /* Number of modules (DLLs) loaded. */ |
| 97 | int *module_opcode_base; /* Starting opcode # for each module. */ |
| 98 | xtensa_insn_decode_fn *module_decode_fn; /* Decode fn for each module. */ |
| 99 | opname_lookup_entry *opname_lookup_table; /* Lookup table for each module. */ |
| 100 | struct config_struct *config; /* Table of configuration parameters. */ |
| 101 | int has_density; /* Is density option available? */ |
| 102 | } xtensa_isa_internal; |
| 103 | |
| 104 | |
| 105 | typedef struct xtensa_isa_module_struct |
| 106 | { |
| 107 | int (*get_num_opcodes_fn) (void); |
| 108 | xtensa_opcode_internal **(*get_opcodes_fn) (void); |
| 109 | int (*decode_insn_fn) (const xtensa_insnbuf); |
| 110 | struct config_struct *(*get_config_table_fn) (void); |
| 111 | } xtensa_isa_module; |
| 112 | |
| 113 | extern xtensa_isa_module xtensa_isa_modules[]; |
| 114 | |