1 /* Copyright (C) 1998-2015 Free Software Foundation, Inc. 2 Contributed by Joern Rennecke 3 4 This file is part of GCC. 5 6 GCC 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 3, or (at your option) 9 any later version. 10 11 GCC 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 GCC; see the file COPYING3. If not see 18 <http://www.gnu.org/licenses/>. */ 19 20 #include <stdlib.h> 21 #include <stdio.h> 22 #include <string.h> 23 24 #include "config.h" 25 26 #define IN_GEN_AVR_MMCU_TEXI 27 28 #include "avr-devices.c" 29 30 // Get rid of "defaults.h". We just need tm.h for `WITH_AVRLIBC' and 31 // and `WITH_RTEMS'. */ 32 #define GCC_DEFAULTS_H 33 34 #include "tm.h" 35 36 // Mimic the include order as specified in config.gcc::tm_file. 37 38 #include "specs.h" 39 40 #if defined (WITH_AVRLIBC) 41 #include "avrlibc.h" 42 #endif 43 44 #if defined (WITH_RTEMS) 45 #include "../rtems.h" 46 #include "rtems.h" 47 #endif 48 49 50 #define SPECFILE_DOC_URL \ 51 "https://gcc.gnu.org/onlinedocs/gcc/Spec-Files.html" 52 53 #define SPECFILE_USAGE_URL \ 54 "https://gcc.gnu.org/gcc-5/changes.html" 55 56 /* Return true iff STR starts with PREFIX. */ 57 58 static bool 59 str_prefix_p (const char *str, const char *prefix) 60 { 61 return 0 == strncmp (str, prefix, strlen (prefix)); 62 } 63 64 65 static const char header[] = 66 "#\n" 67 "# Generated by : ./gcc/config/avr/gen-avr-mmcu-specs.c\n" 68 "# Generated from : ./gcc/config/gcc.c\n" 69 "# ./gcc/config/avr/specs.h\n" 70 #if defined (WITH_RTEMS) 71 "# ./gcc/config/rtems.h\n" 72 "# ./gcc/config/avr/rtems.h\n" 73 #endif 74 #if defined (WITH_AVRLIBC) 75 "# ./gcc/config/avr/avrlibc.h\n" 76 #endif 77 "# Used by : avr-gcc compiler driver\n" 78 "# Used for : building command options for sub-processes\n" 79 "#\n" 80 "# See <" SPECFILE_DOC_URL ">\n" 81 "# for a documentation of spec files.\n" 82 "\n"; 83 84 static const char help_copy_paste[] = 85 "# If you intend to use an existing device specs file as a starting point\n" 86 "# for a new device spec file, make sure you are copying from a specs\n" 87 "# file for a device from the same core architecture and SP width.\n" 88 "# See <" SPECFILE_USAGE_URL "> for a description\n" 89 "# of how to use such own spec files.\n"; 90 91 #if defined (WITH_AVRLIBC) 92 static const char help_dev_lib_name[] = 93 "# AVR-LibC's avr/io.h uses the device specifying macro to determine\n" 94 "# the name of the device header. For example, -mmcu=atmega8a triggers\n" 95 "# the definition of __AVR_ATmega8A__ and avr/io.h includes the device\n" 96 "# header 'iom8a.h' by means of:\n" 97 "#\n" 98 "# ...\n" 99 "# #elif defined (__AVR_ATmega8A__)\n" 100 "# # include <avr/iom8a.h>\n" 101 "# #elif ...\n" 102 "# \n" 103 "# If no device macro is defined, AVR-LibC uses __AVR_DEV_LIB_NAME__\n" 104 "# as fallback to determine the name of the device header as\n" 105 "#\n" 106 "# \"avr/io\" + __AVR_DEV_LIB_NAME__ + \".h\"\n" 107 "#\n" 108 "# If you provide your own specs file for a device not yet known to\n" 109 "# AVR-LibC, you can now define the hook macro __AVR_DEV_LIB_NAME__\n" 110 "# as needed so that\n" 111 "#\n" 112 "# #include <avr/io.h>\n" 113 "#\n" 114 "# will include the desired device header. For ATmega8A the supplement\n" 115 "# to *cpp would read\n" 116 "#\n" 117 "# -D__AVR_DEV_LIB_NAME__=m8a\n" 118 "\n"; 119 #endif // WITH_AVRLIBC 120 121 static void 122 print_mcu (const avr_mcu_t *mcu) 123 { 124 const char *sp8_spec; 125 const avr_mcu_t *arch_mcu; 126 const avr_arch_t *arch; 127 enum avr_arch_id arch_id = mcu->arch_id; 128 129 for (arch_mcu = mcu; arch_mcu->macro; ) 130 arch_mcu--; 131 if (arch_mcu->arch_id != arch_id) 132 exit (EXIT_FAILURE); 133 134 arch = &avr_arch_types[arch_id]; 135 136 char name[100]; 137 if (snprintf (name, sizeof name, "specs-%s", mcu->name) >= (int) sizeof name) 138 exit (EXIT_FAILURE); 139 140 FILE *f = fopen (name ,"w"); 141 142 bool errata_skip = 0 != (mcu->dev_attribute & AVR_ERRATA_SKIP); 143 bool rmw = 0 != (mcu->dev_attribute & AVR_ISA_RMW); 144 bool sp8 = 0 != (mcu->dev_attribute & AVR_SHORT_SP); 145 bool is_arch = NULL == mcu->macro; 146 bool is_device = ! is_arch; 147 148 if (is_arch 149 && (ARCH_AVR2 == arch_id 150 || ARCH_AVR25 == arch_id)) 151 { 152 // Leave "avr2" and "avr25" alone. These two architectures are 153 // the only ones that mix devices with 8-bit SP and 16-bit SP. 154 sp8_spec = ""; 155 } 156 else 157 { 158 sp8_spec = sp8 ? "-msp8" :"%<msp8"; 159 } 160 161 fprintf (f, "#\n" 162 "# Auto-generated specs for AVR "); 163 if (is_arch) 164 fprintf (f, "core architecture %s\n", arch->name); 165 else 166 fprintf (f, "device %s (core %s, %d-bit SP)\n", 167 mcu->name, arch->name, sp8 ? 8 : 16); 168 fprintf (f, "%s\n", header); 169 170 if (is_device) 171 fprintf (f, "%s\n", help_copy_paste); 172 173 #if defined (WITH_AVRLIBC) 174 // AVR-LibC specific. See avrlibc.h for the specs using them as subspecs. 175 176 if (is_device) 177 { 178 fprintf (f, "*avrlibc_startfile:\n"); 179 fprintf (f, "\tcrt%s.o%%s", mcu->name); 180 fprintf (f, "\n\n"); 181 182 fprintf (f, "*avrlibc_devicelib:\n"); 183 fprintf (f, "\t%%{!nodevicelib:-l%s}", mcu->name); 184 fprintf (f, "\n\n"); 185 } 186 #endif // WITH_AVRLIBC 187 188 // avr-gcc specific specs for the compilation / the compiler proper. 189 190 fprintf (f, "*cc1_n_flash:\n" 191 "\t%%{!mn-flash=*:-mn-flash=%d}\n\n", mcu->n_flash); 192 193 fprintf (f, "*cc1_rmw:\n%s\n\n", rmw 194 ? "\t%{!mno-rmw: -mrmw}" 195 : "\t%{mrmw}"); 196 197 fprintf (f, "*cc1_errata_skip:\n%s\n\n", errata_skip 198 ? "\t%{!mno-skip-bug: -mskip-bug}" 199 : "\t%{!mskip-bug: -mno-skip-bug}"); 200 201 // avr-gcc specific specs for assembling / the assembler. 202 203 fprintf (f, "*asm_arch:\n\t-mmcu=%s\n\n", arch->name); 204 205 #ifdef HAVE_AS_AVR_MLINK_RELAX_OPTION 206 fprintf (f, "*asm_relax:\n\t%s\n\n", ASM_RELAX_SPEC); 207 #endif // have avr-as --mlink-relax 208 209 #ifdef HAVE_AS_AVR_MRMW_OPTION 210 fprintf (f, "*asm_rmw:\n%s\n\n", rmw 211 ? "\t%{!mno-rmw: -mrmw}" 212 : "\t%{mrmw}"); 213 #endif // have avr-as -mrmw 214 215 fprintf (f, "*asm_errata_skip:\n%s\n\n", errata_skip 216 ? "\t%{mno-skip-bug}" 217 : "\t%{!mskip-bug: -mno-skip-bug}"); 218 219 // avr-specific specs for linking / the linker. 220 221 int wrap_k = 222 str_prefix_p (mcu->name, "at90usb8") ? 8 223 : str_prefix_p (mcu->name, "atmega16") ? 16 224 : (str_prefix_p (mcu->name, "atmega32") 225 || str_prefix_p (mcu->name, "at90can32")) ? 32 226 : (str_prefix_p (mcu->name, "atmega64") 227 || str_prefix_p (mcu->name, "at90can64") 228 || str_prefix_p (mcu->name, "at90usb64")) ? 64 229 : 0; 230 231 fprintf (f, "*link_pmem_wrap:\n"); 232 if (wrap_k) 233 fprintf (f, "\t%%{mpmem-wrap-around: --pmem-wrap-around=%dk}", wrap_k); 234 fprintf (f, "\n\n"); 235 236 fprintf (f, "*link_relax:\n\t%s\n\n", LINK_RELAX_SPEC); 237 238 fprintf (f, "*link_arch:\n\t%s\n\n", LINK_ARCH_SPEC); 239 240 if (is_device) 241 { 242 fprintf (f, "*link_data_start:\n"); 243 if (mcu->data_section_start 244 != arch->default_data_section_start) 245 fprintf (f, "\t%%{!Tdata:-Tdata 0x%lX}", 246 0x800000UL + mcu->data_section_start); 247 fprintf (f, "\n\n"); 248 249 fprintf (f, "*link_text_start:\n"); 250 if (mcu->text_section_start != 0x0) 251 fprintf (f, "\t%%{!Ttext:-Ttext 0x%lX}", 0UL + mcu->text_section_start); 252 fprintf (f, "\n\n"); 253 } 254 255 // Specs known to GCC. 256 257 if (is_device) 258 { 259 fprintf (f, "*self_spec:\n"); 260 fprintf (f, "\t%%{!mmcu=avr*: %%<mmcu=* -mmcu=%s} ", arch->name); 261 fprintf (f, "%s\n\n", sp8_spec); 262 263 #if defined (WITH_AVRLIBC) 264 fprintf (f, "%s\n", help_dev_lib_name); 265 #endif // WITH_AVRLIBC 266 267 fprintf (f, "*cpp:\n"); 268 fprintf (f, "\t-D%s -D__AVR_DEVICE_NAME__=%s", mcu->macro, mcu->name); 269 fprintf (f, "\n\n"); 270 } 271 272 fprintf (f, "# End of file\n"); 273 274 fclose (f); 275 } 276 277 278 int main (void) 279 { 280 for (const avr_mcu_t *mcu = avr_mcu_types; mcu->name; mcu++) 281 print_mcu (mcu); 282 283 return EXIT_SUCCESS; 284 } 285