1 /* Definitions of types that are used to store AVR architecture and
2 device information.
3 Copyright (C) 2012-2023 Free Software Foundation, Inc.
4 Contributed by Georg-Johann Lay (avr@gjlay.de)
5
6 This file is part of GCC.
7
8 GCC is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3, or (at your option)
11 any later version.
12
13 GCC is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
21
22 #ifndef AVR_ARCH_H
23 #define AVR_ARCH_H
24
25 #define AVR_MMCU_DEFAULT "avr2"
26
27 /* This enum supplies indices into the avr_arch_types[] table below. */
28
29 enum avr_arch_id
30 {
31 ARCH_UNKNOWN,
32 ARCH_AVR1,
33 ARCH_AVR2,
34 ARCH_AVR25,
35 ARCH_AVR3,
36 ARCH_AVR31,
37 ARCH_AVR35,
38 ARCH_AVR4,
39 ARCH_AVR5,
40 ARCH_AVR51,
41 ARCH_AVR6,
42 ARCH_AVRTINY,
43 ARCH_AVRXMEGA2,
44 ARCH_AVRXMEGA3,
45 ARCH_AVRXMEGA4,
46 ARCH_AVRXMEGA5,
47 ARCH_AVRXMEGA6,
48 ARCH_AVRXMEGA7
49 };
50
51
52 /* Architecture-specific properties. */
53
54 typedef struct
55 {
56 /* Assembler only. */
57 int asm_only;
58
59 /* Core have 'MUL*' instructions. */
60 int have_mul;
61
62 /* Core have 'CALL' and 'JMP' instructions. */
63 int have_jmp_call;
64
65 /* Core have 'MOVW' and 'LPM Rx,Z' instructions. */
66 int have_movw_lpmx;
67
68 /* Core have 'ELPM' instructions. */
69 int have_elpm;
70
71 /* Core have 'ELPM Rx,Z' instructions. */
72 int have_elpmx;
73
74 /* Core have 'EICALL' and 'EIJMP' instructions. */
75 int have_eijmp_eicall;
76
77 /* This is an XMEGA core. */
78 int xmega_p;
79
80 /* This core has the RAMPD special function register
81 and thus also the RAMPX, RAMPY and RAMPZ registers. */
82 int have_rampd;
83
84 /* This is a TINY core. */
85 int tiny_p;
86
87 /* Default start of data section address for architecture. */
88 int default_data_section_start;
89
90 /* Offset where flash memory is seen in RAM address range or 0. */
91 int flash_pm_offset;
92
93 /* Offset between SFR address and RAM address:
94 SFR-address = RAM-address - sfr_offset */
95 int sfr_offset;
96
97 /* Architecture id to built-in define __AVR_ARCH__ (NULL -> no macro) */
98 const char *const macro;
99
100 /* Architecture name. */
101 const char *const name;
102 } avr_arch_t;
103
104
105 /* Device-specific properties. */
106
107 typedef struct
108 {
109 /* Device name. */
110 const char *const name;
111
112 /* Index in avr_arch_types[]. */
113 enum avr_arch_id arch_id;
114
115 /* device specific feature */
116 int dev_attribute;
117
118 /* Must lie outside user's namespace. NULL == no macro. */
119 const char *const macro;
120
121 /* Start of data section. */
122 int data_section_start;
123
124 /* Start of text section. */
125 int text_section_start;
126
127 /* Flash size in bytes. */
128 int flash_size;
129
130 /* Offset where flash is seen in the RAM address space. */
131 int flash_pm_offset;
132 } avr_mcu_t;
133
134 /* AVR device specific features.
135
136 AVR_ISA_RMW
137 Only few avr devices have Read-Modify-Write (RMW) instructions
138 (XCH, LAC, LAS and LAT)
139
140 AVR_SHORT_SP
141 Stack Pointer has only 8 bit width.
142 The device / multilib has an 8-bit stack pointer (no SPH).
143
144 AVR_ERRATA_SKIP
145 Some AVR devices have a core erratum when skipping a 2-word instruction.
146 Skip instructions are: SBRC, SBRS, SBIC, SBIS, CPSE.
147 Problems will occur with return address is IRQ executes during the
148 skip sequence.
149
150 A support ticket from Atmel returned the following information:
151
152 Subject: (ATTicket:644469) On AVR skip-bug core Erratum
153 From: avr@atmel.com Date: 2011-07-27
154 (Please keep the subject when replying to this mail)
155
156 This errata exists only in AT90S8515 and ATmega103 devices.
157
158 For information please refer the following respective errata links
159 http://www.atmel.com/dyn/resources/prod_documents/doc2494.pdf
160 http://www.atmel.com/dyn/resources/prod_documents/doc1436.pdf
161
162 AVR_ISA_RCALL
163 Always use RJMP / RCALL and assume JMP / CALL are not available.
164 This affects multilib selection via specs generation and -mshort-calls.
165 Even if a device like ATtiny417 from avrxmega3 supports JMP / CALL, we
166 assume these instructions are not available and we set the built-in
167 macro __AVR_HAVE_JMP_CALL__ accordingly. This macro is used to
168 determine a rough estimate of flash size in libgcc, and AVR-LibC uses
169 this macro to determine vector sizes. */
170
171 enum avr_device_specific_features
172 {
173 AVR_ISA_NONE,
174 AVR_ISA_RMW = 0x1, /* device has RMW instructions. */
175 AVR_SHORT_SP = 0x2, /* Stack Pointer has 8 bits width. */
176 AVR_ERRATA_SKIP = 0x4, /* device has a core erratum. */
177 AVR_ISA_LDS = 0x8, /* whether LDS / STS is valid for all data in static
178 storage. Only useful for reduced Tiny. */
179 AVR_ISA_RCALL = 0x10 /* Use RJMP / RCALL even though JMP / CALL
180 are available (-mshort-calls). */
181 };
182
183 /* Map architecture to its texinfo string. */
184
185 typedef struct
186 {
187 /* Architecture ID. */
188 enum avr_arch_id arch_id;
189
190 /* textinfo source to describe the architecture. */
191 const char *texinfo;
192 } avr_arch_info_t;
193
194 /* Preprocessor macros to define depending on MCU type. */
195
196 extern const avr_arch_t avr_arch_types[];
197 extern const avr_arch_t *avr_arch;
198
199 extern const avr_mcu_t avr_mcu_types[];
200
201 extern void avr_inform_core_architectures (void);
202
203 #endif /* AVR_ARCH_H */