avr-arch.h revision 1.9
1/* Definitions of types that are used to store AVR architecture and 2 device information. 3 Copyright (C) 2012-2020 Free Software Foundation, Inc. 4 Contributed by Georg-Johann Lay (avr@gjlay.de) 5 6This file is part of GCC. 7 8GCC is free software; you can redistribute it and/or modify 9it under the terms of the GNU General Public License as published by 10the Free Software Foundation; either version 3, or (at your option) 11any later version. 12 13GCC is distributed in the hope that it will be useful, 14but WITHOUT ANY WARRANTY; without even the implied warranty of 15MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16GNU General Public License for more details. 17 18You should have received a copy of the GNU General Public License 19along 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 29enum 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 54typedef 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 107typedef 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 136AVR_ISA_RMW 137 Only few avr devices have Read-Modify-Write (RMW) instructions 138 (XCH, LAC, LAS and LAT) 139 140AVR_SHORT_SP 141 Stack Pointer has only 8 bit width. 142 The device / multilib has an 8-bit stack pointer (no SPH). 143 144AVR_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 162AVR_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 171enum 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 185typedef 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 196extern const avr_arch_t avr_arch_types[]; 197extern const avr_arch_t *avr_arch; 198 199extern const avr_mcu_t avr_mcu_types[]; 200 201extern void avr_inform_core_architectures (void); 202 203#endif /* AVR_ARCH_H */ 204