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1 /* Internal definitions for the Xtensa ISA library.
2 *
3 * Copyright (c) 2004-2011 Tensilica Inc.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining
6 * a copy of this software and associated documentation files (the
7 * "Software"), to deal in the Software without restriction, including
8 * without limitation the rights to use, copy, modify, merge, publish,
9 * distribute, sublicense, and/or sell copies of the Software, and to
10 * permit persons to whom the Software is furnished to do so, subject to
11 * the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included
14 * in all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
17 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
19 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
20 * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
21 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
22 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
23 */
24
25 #ifndef XTENSA_ISA_INTERNAL_H
26 #define XTENSA_ISA_INTERNAL_H
27
28 #ifndef uint32
29 #define uint32 uint32_t
30 #endif
31
32 /* Flags. */
33
34 #define XTENSA_OPERAND_IS_REGISTER 0x00000001
35 #define XTENSA_OPERAND_IS_PCRELATIVE 0x00000002
36 #define XTENSA_OPERAND_IS_INVISIBLE 0x00000004
37 #define XTENSA_OPERAND_IS_UNKNOWN 0x00000008
38
39 #define XTENSA_OPCODE_IS_BRANCH 0x00000001
40 #define XTENSA_OPCODE_IS_JUMP 0x00000002
41 #define XTENSA_OPCODE_IS_LOOP 0x00000004
42 #define XTENSA_OPCODE_IS_CALL 0x00000008
43
44 #define XTENSA_STATE_IS_EXPORTED 0x00000001
45 #define XTENSA_STATE_IS_SHARED_OR 0x00000002
46
47 #define XTENSA_INTERFACE_HAS_SIDE_EFFECT 0x00000001
48
49 /* Function pointer typedefs */
50 typedef void (*xtensa_format_encode_fn)(xtensa_insnbuf);
51 typedef void (*xtensa_get_slot_fn)(const xtensa_insnbuf, xtensa_insnbuf);
52 typedef void (*xtensa_set_slot_fn)(xtensa_insnbuf, const xtensa_insnbuf);
53 typedef int (*xtensa_opcode_decode_fn)(const xtensa_insnbuf);
54 typedef uint32_t (*xtensa_get_field_fn)(const xtensa_insnbuf);
55 typedef void (*xtensa_set_field_fn)(xtensa_insnbuf, uint32_t);
56 typedef int (*xtensa_immed_decode_fn)(uint32_t *);
57 typedef int (*xtensa_immed_encode_fn)(uint32_t *);
58 typedef int (*xtensa_do_reloc_fn)(uint32_t *, uint32_t);
59 typedef int (*xtensa_undo_reloc_fn)(uint32_t *, uint32_t);
60 typedef void (*xtensa_opcode_encode_fn)(xtensa_insnbuf);
61 typedef int (*xtensa_format_decode_fn)(const xtensa_insnbuf);
62 typedef int (*xtensa_length_decode_fn)(const unsigned char *);
63
64 typedef struct xtensa_format_internal_struct {
65 const char *name; /* Instruction format name. */
66 int length; /* Instruction length in bytes. */
67 xtensa_format_encode_fn encode_fn;
68 int num_slots;
69 int *slot_id; /* Array[num_slots] of slot IDs. */
70 } xtensa_format_internal;
71
72 typedef struct xtensa_slot_internal_struct {
73 const char *name; /* Not necessarily unique. */
74 const char *format;
75 int position;
76 xtensa_get_slot_fn get_fn;
77 xtensa_set_slot_fn set_fn;
78 xtensa_get_field_fn *get_field_fns; /* Array[field_id]. */
79 xtensa_set_field_fn *set_field_fns; /* Array[field_id]. */
80 xtensa_opcode_decode_fn opcode_decode_fn;
81 const char *nop_name;
82 } xtensa_slot_internal;
83
84 typedef struct xtensa_operand_internal_struct {
85 const char *name;
86 int field_id;
87 xtensa_regfile regfile; /* Register file. */
88 int num_regs; /* Usually 1; 2 for reg pairs, etc. */
89 uint32_t flags; /* See XTENSA_OPERAND_* flags. */
90 xtensa_immed_encode_fn encode; /* Encode the operand value. */
91 xtensa_immed_decode_fn decode; /* Decode the value from the field. */
92 xtensa_do_reloc_fn do_reloc; /* Perform a PC-relative reloc. */
93 xtensa_undo_reloc_fn undo_reloc; /* Undo a PC-relative relocation. */
94 } xtensa_operand_internal;
95
96 typedef struct xtensa_arg_internal_struct {
97 union {
98 int operand_id; /* For normal operands. */
99 xtensa_state state; /* For stateOperands. */
100 } u;
101 char inout; /* Direction: 'i', 'o', or 'm'. */
102 } xtensa_arg_internal;
103
104 typedef struct xtensa_iclass_internal_struct {
105 int num_operands; /* Size of "operands" array. */
106 xtensa_arg_internal *operands; /* Array[num_operands]. */
107
108 int num_stateOperands; /* Size of "stateOperands" array. */
109 xtensa_arg_internal *stateOperands; /* Array[num_stateOperands]. */
110
111 int num_interfaceOperands; /* Size of "interfaceOperands". */
112 xtensa_interface *interfaceOperands; /* Array[num_interfaceOperands]. */
113 } xtensa_iclass_internal;
114
115 typedef struct xtensa_opcode_internal_struct {
116 const char *name; /* Opcode mnemonic. */
117 int iclass_id; /* Iclass for this opcode. */
118 uint32_t flags; /* See XTENSA_OPCODE_* flags. */
119 xtensa_opcode_encode_fn *encode_fns; /* Array[slot_id]. */
120 int num_funcUnit_uses; /* Number of funcUnit_use entries. */
121 xtensa_funcUnit_use *funcUnit_uses; /* Array[num_funcUnit_uses]. */
122 } xtensa_opcode_internal;
123
124 typedef struct xtensa_regfile_internal_struct {
125 const char *name; /* Full name of the regfile. */
126 const char *shortname; /* Abbreviated name. */
127 xtensa_regfile parent; /* View parent (or identity). */
128 int num_bits; /* Width of the registers. */
129 int num_entries; /* Number of registers. */
130 } xtensa_regfile_internal;
131
132 typedef struct xtensa_interface_internal_struct {
133 const char *name; /* Interface name. */
134 int num_bits; /* Width of the interface. */
135 uint32_t flags; /* See XTENSA_INTERFACE_* flags. */
136 int class_id; /* Class of related interfaces. */
137 char inout; /* "i" or "o". */
138 } xtensa_interface_internal;
139
140 typedef struct xtensa_funcUnit_internal_struct {
141 const char *name; /* Functional unit name. */
142 int num_copies; /* Number of instances. */
143 } xtensa_funcUnit_internal;
144
145 typedef struct xtensa_state_internal_struct {
146 const char *name; /* State name. */
147 int num_bits; /* Number of state bits. */
148 uint32_t flags; /* See XTENSA_STATE_* flags. */
149 } xtensa_state_internal;
150
151 typedef struct xtensa_sysreg_internal_struct {
152 const char *name; /* Register name. */
153 int number; /* Register number. */
154 int is_user; /* Non-zero if a "user register". */
155 } xtensa_sysreg_internal;
156
157 typedef struct xtensa_lookup_entry_struct {
158 const char *key;
159 union {
160 xtensa_opcode opcode; /* Internal opcode number. */
161 xtensa_sysreg sysreg; /* Internal sysreg number. */
162 xtensa_state state; /* Internal state number. */
163 xtensa_interface intf; /* Internal interface number. */
164 xtensa_funcUnit fun; /* Internal funcUnit number. */
165 } u;
166 } xtensa_lookup_entry;
167
168 typedef struct xtensa_isa_internal_struct {
169 int is_big_endian; /* Endianness. */
170 int insn_size; /* Maximum length in bytes. */
171 int insnbuf_size; /* Number of insnbuf_words. */
172
173 int num_formats;
174 xtensa_format_internal *formats;
175 xtensa_format_decode_fn format_decode_fn;
176 xtensa_length_decode_fn length_decode_fn;
177
178 int num_slots;
179 xtensa_slot_internal *slots;
180
181 int num_fields;
182
183 int num_operands;
184 xtensa_operand_internal *operands;
185
186 int num_iclasses;
187 xtensa_iclass_internal *iclasses;
188
189 int num_opcodes;
190 xtensa_opcode_internal *opcodes;
191 xtensa_lookup_entry *opname_lookup_table;
192
193 int num_regfiles;
194 xtensa_regfile_internal *regfiles;
195
196 int num_states;
197 xtensa_state_internal *states;
198 xtensa_lookup_entry *state_lookup_table;
199
200 int num_sysregs;
201 xtensa_sysreg_internal *sysregs;
202 xtensa_lookup_entry *sysreg_lookup_table;
203
204 /*
205 * The current Xtensa ISA only supports 256 of each kind of sysreg so
206 * we can get away with implementing lookups with tables indexed by
207 * the register numbers. If we ever allow larger sysreg numbers, this
208 * may have to be reimplemented. The first entry in the following
209 * arrays corresponds to "special" registers and the second to "user"
210 * registers.
211 */
212 int max_sysreg_num[2];
213 xtensa_sysreg *sysreg_table[2];
214
215 int num_interfaces;
216 xtensa_interface_internal *interfaces;
217 xtensa_lookup_entry *interface_lookup_table;
218
219 int num_funcUnits;
220 xtensa_funcUnit_internal *funcUnits;
221 xtensa_lookup_entry *funcUnit_lookup_table;
222
223 int num_stages; /* Number of pipe stages. */
224 } xtensa_isa_internal;
225
226 int xtensa_isa_name_compare(const void *, const void *);
227
228 extern xtensa_isa_status xtisa_errno;
229 extern char xtisa_error_msg[];
230
231 #endif /* XTENSA_ISA_INTERNAL_H */