1139368Sobrien/* Copyright (C) 1998-2020 Free Software Foundation, Inc. 2139368Sobrien Contributed by Joern Rennecke 3139368Sobrien 4139368Sobrien This file is part of GCC. 5139368Sobrien 6139368Sobrien GCC is free software; you can redistribute it and/or modify 7139368Sobrien it under the terms of the GNU General Public License as published by 8139368Sobrien the Free Software Foundation; either version 3, or (at your option) 9139368Sobrien any later version. 10139368Sobrien 11139368Sobrien GCC is distributed in the hope that it will be useful, 12139368Sobrien but WITHOUT ANY WARRANTY; without even the implied warranty of 13139368Sobrien MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14139368Sobrien GNU General Public License for more details. 15139368Sobrien 16139368Sobrien You should have received a copy of the GNU General Public License 17139368Sobrien along with GCC; see the file COPYING3. If not see 18139368Sobrien <http://www.gnu.org/licenses/>. */ 19139368Sobrien 20139368Sobrien#include <stdlib.h> 21139368Sobrien#include <stdio.h> 22139368Sobrien#include <string.h> 23139368Sobrien 24139368Sobrien#define IN_TARGET_CODE 1 25139368Sobrien 26139368Sobrien#include "config.h" 27139368Sobrien 28#define IN_GEN_AVR_MMCU_TEXI 29 30#include "avr-devices.c" 31 32// Get rid of "defaults.h". We just need tm.h for `WITH_AVRLIBC' and 33// and `WITH_RTEMS'. */ 34#define GCC_DEFAULTS_H 35 36#include "tm.h" 37 38// Mimic the include order as specified in config.gcc::tm_file. 39 40#include "specs.h" 41 42#if defined (WITH_AVRLIBC) 43#include "avrlibc.h" 44#endif 45 46 47#define SPECFILE_DOC_URL \ 48 "https://gcc.gnu.org/onlinedocs/gcc/Spec-Files.html" 49 50#define SPECFILE_USAGE_URL \ 51 "https://gcc.gnu.org/gcc-5/changes.html" 52 53 54static const char header[] = 55 "#\n" 56 "# Generated by : ./gcc/config/avr/gen-avr-mmcu-specs.c\n" 57 "# Generated from : ./gcc/config/gcc.c\n" 58 "# ./gcc/config/avr/specs.h\n" 59#if defined (WITH_AVRLIBC) 60 "# ./gcc/config/avr/avrlibc.h\n" 61#endif 62 "# Used by : avr-gcc compiler driver\n" 63 "# Used for : building command options for sub-processes\n" 64 "#\n" 65 "# See <" SPECFILE_DOC_URL ">\n" 66 "# for a documentation of spec files.\n" 67 "\n"; 68 69static const char help_copy_paste[] = 70 "# If you intend to use an existing device specs file as a starting point\n" 71 "# for a new device spec file, make sure you are copying from a specs\n" 72 "# file for a device from the same core architecture and SP width.\n" 73 "# See <" SPECFILE_USAGE_URL "> for a description\n" 74 "# of how to use such own spec files.\n"; 75 76#if defined (WITH_AVRLIBC) 77static const char help_dev_lib_name[] = 78 "# AVR-LibC's avr/io.h uses the device specifying macro to determine\n" 79 "# the name of the device header. For example, -mmcu=atmega8a triggers\n" 80 "# the definition of __AVR_ATmega8A__ and avr/io.h includes the device\n" 81 "# header 'iom8a.h' by means of:\n" 82 "#\n" 83 "# ...\n" 84 "# #elif defined (__AVR_ATmega8A__)\n" 85 "# # include <avr/iom8a.h>\n" 86 "# #elif ...\n" 87 "# \n" 88 "# If no device macro is defined, AVR-LibC uses __AVR_DEV_LIB_NAME__\n" 89 "# as fallback to determine the name of the device header as\n" 90 "#\n" 91 "# \"avr/io\" + __AVR_DEV_LIB_NAME__ + \".h\"\n" 92 "#\n" 93 "# If you provide your own specs file for a device not yet known to\n" 94 "# AVR-LibC, you can now define the hook macro __AVR_DEV_LIB_NAME__\n" 95 "# as needed so that\n" 96 "#\n" 97 "# #include <avr/io.h>\n" 98 "#\n" 99 "# will include the desired device header. For ATmega8A the supplement\n" 100 "# to *cpp_avrlibc would read\n" 101 "#\n" 102 "# -D__AVR_DEV_LIB_NAME__=m8a\n" 103 "\n"; 104#endif // WITH_AVRLIBC 105 106static void 107print_mcu (const avr_mcu_t *mcu) 108{ 109 const char *sp8_spec; 110 const char *rcall_spec; 111 const avr_mcu_t *arch_mcu; 112 const avr_arch_t *arch; 113 enum avr_arch_id arch_id = mcu->arch_id; 114 115 for (arch_mcu = mcu; arch_mcu->macro; ) 116 arch_mcu--; 117 if (arch_mcu->arch_id != arch_id) 118 exit (EXIT_FAILURE); 119 120 arch = &avr_arch_types[arch_id]; 121 122 char name[100]; 123 if (snprintf (name, sizeof name, "specs-%s", mcu->name) >= (int) sizeof name) 124 exit (EXIT_FAILURE); 125 126 FILE *f = fopen (name ,"w"); 127 128 bool absdata = (mcu->dev_attribute & AVR_ISA_LDS) != 0; 129 bool errata_skip = (mcu->dev_attribute & AVR_ERRATA_SKIP) != 0; 130 bool rmw = (mcu->dev_attribute & AVR_ISA_RMW) != 0; 131 bool sp8 = (mcu->dev_attribute & AVR_SHORT_SP) != 0; 132 bool rcall = (mcu->dev_attribute & AVR_ISA_RCALL); 133 bool is_arch = mcu->macro == NULL; 134 bool is_device = ! is_arch; 135 int flash_pm_offset = 0; 136 137 if (arch->flash_pm_offset 138 && mcu->flash_pm_offset 139 && mcu->flash_pm_offset != arch->flash_pm_offset) 140 { 141 flash_pm_offset = mcu->flash_pm_offset; 142 } 143 144 if (is_arch 145 && (ARCH_AVR2 == arch_id 146 || ARCH_AVR25 == arch_id)) 147 { 148 // Leave "avr2" and "avr25" alone. These two architectures are 149 // the only ones that mix devices with 8-bit SP and 16-bit SP. 150 sp8_spec = ""; 151 } 152 else 153 { 154 sp8_spec = sp8 ? "-msp8" :"%<msp8"; 155 } 156 157 if (is_arch 158 && ARCH_AVRXMEGA3 == arch_id) 159 { 160 // Leave "avrxmega3" alone. This architectures is the only one 161 // that mixes devices with and without JMP / CALL. 162 rcall_spec = ""; 163 } 164 else 165 { 166 rcall_spec = rcall ? "-mshort-calls" : "%<mshort-calls"; 167 } 168 169 fprintf (f, "#\n" 170 "# Auto-generated specs for AVR "); 171 if (is_arch) 172 fprintf (f, "core architecture %s\n", arch->name); 173 else 174 fprintf (f, "device %s (core %s, %d-bit SP%s)\n", mcu->name, 175 arch->name, sp8 ? 8 : 16, rcall ? ", short-calls" : ""); 176 fprintf (f, "%s\n", header); 177 178 if (is_device) 179 fprintf (f, "%s\n", help_copy_paste); 180 181#if defined (WITH_AVRLIBC) 182 // AVR-LibC specific. See avrlibc.h for the specs using them as subspecs. 183 184 if (is_device) 185 { 186 fprintf (f, "*avrlibc_startfile:\n"); 187 fprintf (f, "\tcrt%s.o%%s", mcu->name); 188 fprintf (f, "\n\n"); 189 190 fprintf (f, "*avrlibc_devicelib:\n"); 191 fprintf (f, "\t%%{!nodevicelib:-l%s}", mcu->name); 192 fprintf (f, "\n\n"); 193 } 194#endif // WITH_AVRLIBC 195 196 // avr-gcc specific specs for the compilation / the compiler proper. 197 198 int n_flash = 1 + (mcu->flash_size - 1) / 0x10000; 199 200 fprintf (f, "*cc1_n_flash:\n" 201 "\t%%{!mn-flash=*:-mn-flash=%d}\n\n", n_flash); 202 203 fprintf (f, "*cc1_rmw:\n%s\n\n", rmw 204 ? "\t%{!mno-rmw: -mrmw}" 205 : "\t%{mrmw}"); 206 207 fprintf (f, "*cc1_errata_skip:\n%s\n\n", errata_skip 208 ? "\t%{!mno-skip-bug: -mskip-bug}" 209 : "\t%{!mskip-bug: -mno-skip-bug}"); 210 211 fprintf (f, "*cc1_absdata:\n%s\n\n", absdata 212 ? "\t%{!mno-absdata: -mabsdata}" 213 : "\t%{mabsdata}"); 214 215 // avr-gcc specific specs for assembling / the assembler. 216 217 fprintf (f, "*asm_arch:\n\t-mmcu=%s\n\n", arch->name); 218 219#ifdef HAVE_AS_AVR_MLINK_RELAX_OPTION 220 fprintf (f, "*asm_relax:\n\t%s\n\n", ASM_RELAX_SPEC); 221#endif // have avr-as --mlink-relax 222 223#ifdef HAVE_AS_AVR_MRMW_OPTION 224 fprintf (f, "*asm_rmw:\n%s\n\n", rmw 225 ? "\t%{!mno-rmw: -mrmw}" 226 : "\t%{mrmw}"); 227#endif // have avr-as -mrmw 228 229#ifdef HAVE_AS_AVR_MGCCISR_OPTION 230 fprintf (f, "*asm_gccisr:\n%s\n\n", 231 "\t%{!mno-gas-isr-prologues: -mgcc-isr}"); 232#endif // have avr-as -mgcc-isr 233 234 fprintf (f, "*asm_errata_skip:\n%s\n\n", errata_skip 235 ? "\t%{mno-skip-bug}" 236 : "\t%{!mskip-bug: -mno-skip-bug}"); 237 238 // avr-specific specs for linking / the linker. 239 240 int wrap_k = 241 mcu->flash_size == 0x2000 ? 8 242 : mcu->flash_size == 0x4000 ? 16 243 : mcu->flash_size == 0x8000 ? 32 244 : mcu->flash_size == 0x10000 ? 64 245 : 0; 246 247 fprintf (f, "*link_pmem_wrap:\n"); 248 if (wrap_k == 8) 249 fprintf (f, "\t%%{!mno-pmem-wrap-around: --pmem-wrap-around=8k}"); 250 else if (wrap_k > 8) 251 fprintf (f, "\t%%{mpmem-wrap-around: --pmem-wrap-around=%dk}", wrap_k); 252 fprintf (f, "\n\n"); 253 254 fprintf (f, "*link_relax:\n\t%s\n\n", LINK_RELAX_SPEC); 255 256 fprintf (f, "*link_arch:\n\t%s", LINK_ARCH_SPEC); 257 if (is_device 258 && flash_pm_offset) 259 fprintf (f, " --defsym=__RODATA_PM_OFFSET__=0x%x", flash_pm_offset); 260 fprintf (f, "\n\n"); 261 262 if (is_device) 263 { 264 fprintf (f, "*link_data_start:\n"); 265 if (mcu->data_section_start 266 != arch->default_data_section_start) 267 fprintf (f, "\t%%{!Tdata:-Tdata 0x%lX}", 268 0x800000UL + mcu->data_section_start); 269 fprintf (f, "\n\n"); 270 271 fprintf (f, "*link_text_start:\n"); 272 if (mcu->text_section_start != 0x0) 273 fprintf (f, "\t%%{!Ttext:-Ttext 0x%lX}", 0UL + mcu->text_section_start); 274 fprintf (f, "\n\n"); 275 } 276 277 // Specs known to GCC. 278 279 if (is_device) 280 { 281 fprintf (f, "*self_spec:\n"); 282 fprintf (f, "\t%%{!mmcu=avr*: %%<mmcu=* -mmcu=%s} ", arch->name); 283 fprintf (f, "%s ", rcall_spec); 284 fprintf (f, "%s\n\n", sp8_spec); 285 286#if defined (WITH_AVRLIBC) 287 fprintf (f, "%s\n", help_dev_lib_name); 288 289 fprintf (f, "*cpp_avrlibc:\n"); 290 fprintf (f, "\t-D__AVR_DEVICE_NAME__=%s", mcu->name); 291 fprintf (f, "\n\n"); 292#endif // WITH_AVRLIBC 293 294 fprintf (f, "*cpp_mcu:\n"); 295 fprintf (f, "\t-D%s", mcu->macro); 296 if (flash_pm_offset) 297 { 298 fprintf (f, " -U__AVR_PM_BASE_ADDRESS__"); 299 fprintf (f, " -D__AVR_PM_BASE_ADDRESS__=0x%x", flash_pm_offset); 300 } 301 fprintf (f, "\n\n"); 302 303 fprintf (f, "*cpp:\n"); 304 fprintf (f, "\t%%(cpp_mcu)"); 305#if defined (WITH_AVRLIBC) 306 fprintf (f, " %%(cpp_avrlibc)"); 307#endif // WITH_AVRLIBC 308 fprintf (f, "\n\n"); 309 } 310 311 fprintf (f, "# End of file\n"); 312 313 fclose (f); 314} 315 316 317int main (void) 318{ 319 for (const avr_mcu_t *mcu = avr_mcu_types; mcu->name; mcu++) 320 print_mcu (mcu); 321 322 return EXIT_SUCCESS; 323} 324