1 /* Copyright (C) 1998-2019 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 #define IN_TARGET_CODE 1
25
26 #include "config.h"
27
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
54 static 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
69 static 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)
77 static 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
106 static void
print_mcu(const avr_mcu_t * mcu)107 print_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
main(void)317 int 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