gen-avr-mmcu-specs.c revision 1.3
1/* Copyright (C) 1998-2017 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 45#define SPECFILE_DOC_URL \ 46 "https://gcc.gnu.org/onlinedocs/gcc/Spec-Files.html" 47 48#define SPECFILE_USAGE_URL \ 49 "https://gcc.gnu.org/gcc-5/changes.html" 50 51/* Return true iff STR starts with PREFIX. */ 52 53static bool 54str_prefix_p (const char *str, const char *prefix) 55{ 56 return 0 == strncmp (str, prefix, strlen (prefix)); 57} 58 59 60static const char header[] = 61 "#\n" 62 "# Generated by : ./gcc/config/avr/gen-avr-mmcu-specs.c\n" 63 "# Generated from : ./gcc/config/gcc.c\n" 64 "# ./gcc/config/avr/specs.h\n" 65#if defined (WITH_AVRLIBC) 66 "# ./gcc/config/avr/avrlibc.h\n" 67#endif 68 "# Used by : avr-gcc compiler driver\n" 69 "# Used for : building command options for sub-processes\n" 70 "#\n" 71 "# See <" SPECFILE_DOC_URL ">\n" 72 "# for a documentation of spec files.\n" 73 "\n"; 74 75static const char help_copy_paste[] = 76 "# If you intend to use an existing device specs file as a starting point\n" 77 "# for a new device spec file, make sure you are copying from a specs\n" 78 "# file for a device from the same core architecture and SP width.\n" 79 "# See <" SPECFILE_USAGE_URL "> for a description\n" 80 "# of how to use such own spec files.\n"; 81 82#if defined (WITH_AVRLIBC) 83static const char help_dev_lib_name[] = 84 "# AVR-LibC's avr/io.h uses the device specifying macro to determine\n" 85 "# the name of the device header. For example, -mmcu=atmega8a triggers\n" 86 "# the definition of __AVR_ATmega8A__ and avr/io.h includes the device\n" 87 "# header 'iom8a.h' by means of:\n" 88 "#\n" 89 "# ...\n" 90 "# #elif defined (__AVR_ATmega8A__)\n" 91 "# # include <avr/iom8a.h>\n" 92 "# #elif ...\n" 93 "# \n" 94 "# If no device macro is defined, AVR-LibC uses __AVR_DEV_LIB_NAME__\n" 95 "# as fallback to determine the name of the device header as\n" 96 "#\n" 97 "# \"avr/io\" + __AVR_DEV_LIB_NAME__ + \".h\"\n" 98 "#\n" 99 "# If you provide your own specs file for a device not yet known to\n" 100 "# AVR-LibC, you can now define the hook macro __AVR_DEV_LIB_NAME__\n" 101 "# as needed so that\n" 102 "#\n" 103 "# #include <avr/io.h>\n" 104 "#\n" 105 "# will include the desired device header. For ATmega8A the supplement\n" 106 "# to *cpp would read\n" 107 "#\n" 108 "# -D__AVR_DEV_LIB_NAME__=m8a\n" 109 "\n"; 110#endif // WITH_AVRLIBC 111 112static void 113print_mcu (const avr_mcu_t *mcu) 114{ 115 const char *sp8_spec; 116 const avr_mcu_t *arch_mcu; 117 const avr_arch_t *arch; 118 enum avr_arch_id arch_id = mcu->arch_id; 119 120 for (arch_mcu = mcu; arch_mcu->macro; ) 121 arch_mcu--; 122 if (arch_mcu->arch_id != arch_id) 123 exit (EXIT_FAILURE); 124 125 arch = &avr_arch_types[arch_id]; 126 127 char name[100]; 128 if (snprintf (name, sizeof name, "specs-%s", mcu->name) >= (int) sizeof name) 129 exit (EXIT_FAILURE); 130 131 FILE *f = fopen (name ,"w"); 132 133 bool absdata = 0 != (mcu->dev_attribute & AVR_ISA_LDS); 134 bool errata_skip = 0 != (mcu->dev_attribute & AVR_ERRATA_SKIP); 135 bool rmw = 0 != (mcu->dev_attribute & AVR_ISA_RMW); 136 bool sp8 = 0 != (mcu->dev_attribute & AVR_SHORT_SP); 137 bool is_arch = NULL == mcu->macro; 138 bool is_device = ! is_arch; 139 140 if (is_arch 141 && (ARCH_AVR2 == arch_id 142 || ARCH_AVR25 == arch_id)) 143 { 144 // Leave "avr2" and "avr25" alone. These two architectures are 145 // the only ones that mix devices with 8-bit SP and 16-bit SP. 146 sp8_spec = ""; 147 } 148 else 149 { 150 sp8_spec = sp8 ? "-msp8" :"%<msp8"; 151 } 152 153 fprintf (f, "#\n" 154 "# Auto-generated specs for AVR "); 155 if (is_arch) 156 fprintf (f, "core architecture %s\n", arch->name); 157 else 158 fprintf (f, "device %s (core %s, %d-bit SP)\n", 159 mcu->name, arch->name, sp8 ? 8 : 16); 160 fprintf (f, "%s\n", header); 161 162 if (is_device) 163 fprintf (f, "%s\n", help_copy_paste); 164 165#if defined (WITH_AVRLIBC) 166 // AVR-LibC specific. See avrlibc.h for the specs using them as subspecs. 167 168 if (is_device) 169 { 170 fprintf (f, "*avrlibc_startfile:\n"); 171 fprintf (f, "\tcrt%s.o%%s", mcu->name); 172 fprintf (f, "\n\n"); 173 174 fprintf (f, "*avrlibc_devicelib:\n"); 175 fprintf (f, "\t%%{!nodevicelib:-l%s}", mcu->name); 176 fprintf (f, "\n\n"); 177 } 178#endif // WITH_AVRLIBC 179 180 // avr-gcc specific specs for the compilation / the compiler proper. 181 182 int n_flash = 1 + (mcu->flash_size - 1) / 0x10000; 183 184 fprintf (f, "*cc1_n_flash:\n" 185 "\t%%{!mn-flash=*:-mn-flash=%d}\n\n", n_flash); 186 187 fprintf (f, "*cc1_rmw:\n%s\n\n", rmw 188 ? "\t%{!mno-rmw: -mrmw}" 189 : "\t%{mrmw}"); 190 191 fprintf (f, "*cc1_errata_skip:\n%s\n\n", errata_skip 192 ? "\t%{!mno-skip-bug: -mskip-bug}" 193 : "\t%{!mskip-bug: -mno-skip-bug}"); 194 195 fprintf (f, "*cc1_absdata:\n%s\n\n", absdata 196 ? "\t%{!mno-absdata: -mabsdata}" 197 : "\t%{mabsdata}"); 198 199 // avr-gcc specific specs for assembling / the assembler. 200 201 fprintf (f, "*asm_arch:\n\t-mmcu=%s\n\n", arch->name); 202 203#ifdef HAVE_AS_AVR_MLINK_RELAX_OPTION 204 fprintf (f, "*asm_relax:\n\t%s\n\n", ASM_RELAX_SPEC); 205#endif // have avr-as --mlink-relax 206 207#ifdef HAVE_AS_AVR_MRMW_OPTION 208 fprintf (f, "*asm_rmw:\n%s\n\n", rmw 209 ? "\t%{!mno-rmw: -mrmw}" 210 : "\t%{mrmw}"); 211#endif // have avr-as -mrmw 212 213 fprintf (f, "*asm_errata_skip:\n%s\n\n", errata_skip 214 ? "\t%{mno-skip-bug}" 215 : "\t%{!mskip-bug: -mno-skip-bug}"); 216 217 // avr-specific specs for linking / the linker. 218 219 int wrap_k = 220 mcu->flash_size == 0x2000 ? 8 221 : mcu->flash_size == 0x4000 ? 16 222 : mcu->flash_size == 0x8000 ? 32 223 : mcu->flash_size == 0x10000 ? 64 224 : 0; 225 226 fprintf (f, "*link_pmem_wrap:\n"); 227 if (wrap_k == 8) 228 fprintf (f, "\t%%{!mno-pmem-wrap-around: --pmem-wrap-around=8k}"); 229 else if (wrap_k > 8) 230 fprintf (f, "\t%%{mpmem-wrap-around: --pmem-wrap-around=%dk}", wrap_k); 231 fprintf (f, "\n\n"); 232 233 fprintf (f, "*link_relax:\n\t%s\n\n", LINK_RELAX_SPEC); 234 235 fprintf (f, "*link_arch:\n\t%s\n\n", LINK_ARCH_SPEC); 236 237 if (is_device) 238 { 239 fprintf (f, "*link_data_start:\n"); 240 if (mcu->data_section_start 241 != arch->default_data_section_start) 242 fprintf (f, "\t%%{!Tdata:-Tdata 0x%lX}", 243 0x800000UL + mcu->data_section_start); 244 fprintf (f, "\n\n"); 245 246 fprintf (f, "*link_text_start:\n"); 247 if (mcu->text_section_start != 0x0) 248 fprintf (f, "\t%%{!Ttext:-Ttext 0x%lX}", 0UL + mcu->text_section_start); 249 fprintf (f, "\n\n"); 250 } 251 252 // Specs known to GCC. 253 254 if (is_device) 255 { 256 fprintf (f, "*self_spec:\n"); 257 fprintf (f, "\t%%{!mmcu=avr*: %%<mmcu=* -mmcu=%s} ", arch->name); 258 fprintf (f, "%s\n\n", sp8_spec); 259 260#if defined (WITH_AVRLIBC) 261 fprintf (f, "%s\n", help_dev_lib_name); 262#endif // WITH_AVRLIBC 263 264 fprintf (f, "*cpp:\n"); 265 fprintf (f, "\t-D%s -D__AVR_DEVICE_NAME__=%s", mcu->macro, mcu->name); 266 fprintf (f, "\n\n"); 267 } 268 269 fprintf (f, "# End of file\n"); 270 271 fclose (f); 272} 273 274 275int main (void) 276{ 277 for (const avr_mcu_t *mcu = avr_mcu_types; mcu->name; mcu++) 278 print_mcu (mcu); 279 280 return EXIT_SUCCESS; 281} 282