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131
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1 /* Copyright (C) 1998-2018 Free Software Foundation, Inc.
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111
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2 Contributed by Joern Rennecke
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3
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4 This file is part of GCC.
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5
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6 GCC is free software; you can redistribute it and/or modify
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7 it under the terms of the GNU General Public License as published by
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8 the Free Software Foundation; either version 3, or (at your option)
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9 any later version.
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10
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11 GCC is distributed in the hope that it will be useful,
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12 but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 GNU General Public License for more details.
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15
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16 You should have received a copy of the GNU General Public License
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17 along with GCC; see the file COPYING3. If not see
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18 <http://www.gnu.org/licenses/>. */
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19
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20 #include <stdlib.h>
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21 #include <stdio.h>
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22 #include <string.h>
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23
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131
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24 #define IN_TARGET_CODE 1
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25
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111
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26 #include "config.h"
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27
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28 #define IN_GEN_AVR_MMCU_TEXI
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29
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30 #include "avr-devices.c"
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31
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32 // Get rid of "defaults.h". We just need tm.h for `WITH_AVRLIBC' and
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33 // and `WITH_RTEMS'. */
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34 #define GCC_DEFAULTS_H
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35
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36 #include "tm.h"
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37
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38 // Mimic the include order as specified in config.gcc::tm_file.
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39
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40 #include "specs.h"
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41
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42 #if defined (WITH_AVRLIBC)
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43 #include "avrlibc.h"
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44 #endif
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45
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46
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47 #define SPECFILE_DOC_URL \
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48 "https://gcc.gnu.org/onlinedocs/gcc/Spec-Files.html"
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49
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50 #define SPECFILE_USAGE_URL \
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51 "https://gcc.gnu.org/gcc-5/changes.html"
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52
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53 /* Return true iff STR starts with PREFIX. */
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54
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55 static bool
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56 str_prefix_p (const char *str, const char *prefix)
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57 {
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131
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58 return strncmp (str, prefix, strlen (prefix)) == 0;
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111
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59 }
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60
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61
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62 static const char header[] =
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63 "#\n"
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64 "# Generated by : ./gcc/config/avr/gen-avr-mmcu-specs.c\n"
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65 "# Generated from : ./gcc/config/gcc.c\n"
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66 "# ./gcc/config/avr/specs.h\n"
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67 #if defined (WITH_AVRLIBC)
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68 "# ./gcc/config/avr/avrlibc.h\n"
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69 #endif
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70 "# Used by : avr-gcc compiler driver\n"
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71 "# Used for : building command options for sub-processes\n"
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72 "#\n"
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73 "# See <" SPECFILE_DOC_URL ">\n"
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74 "# for a documentation of spec files.\n"
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75 "\n";
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76
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77 static const char help_copy_paste[] =
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78 "# If you intend to use an existing device specs file as a starting point\n"
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79 "# for a new device spec file, make sure you are copying from a specs\n"
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80 "# file for a device from the same core architecture and SP width.\n"
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81 "# See <" SPECFILE_USAGE_URL "> for a description\n"
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82 "# of how to use such own spec files.\n";
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83
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84 #if defined (WITH_AVRLIBC)
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85 static const char help_dev_lib_name[] =
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86 "# AVR-LibC's avr/io.h uses the device specifying macro to determine\n"
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87 "# the name of the device header. For example, -mmcu=atmega8a triggers\n"
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88 "# the definition of __AVR_ATmega8A__ and avr/io.h includes the device\n"
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89 "# header 'iom8a.h' by means of:\n"
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90 "#\n"
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91 "# ...\n"
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92 "# #elif defined (__AVR_ATmega8A__)\n"
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93 "# # include <avr/iom8a.h>\n"
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94 "# #elif ...\n"
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95 "# \n"
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96 "# If no device macro is defined, AVR-LibC uses __AVR_DEV_LIB_NAME__\n"
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97 "# as fallback to determine the name of the device header as\n"
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98 "#\n"
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99 "# \"avr/io\" + __AVR_DEV_LIB_NAME__ + \".h\"\n"
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100 "#\n"
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101 "# If you provide your own specs file for a device not yet known to\n"
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102 "# AVR-LibC, you can now define the hook macro __AVR_DEV_LIB_NAME__\n"
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103 "# as needed so that\n"
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104 "#\n"
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105 "# #include <avr/io.h>\n"
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106 "#\n"
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107 "# will include the desired device header. For ATmega8A the supplement\n"
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108 "# to *cpp would read\n"
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109 "#\n"
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110 "# -D__AVR_DEV_LIB_NAME__=m8a\n"
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111 "\n";
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112 #endif // WITH_AVRLIBC
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113
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114 static void
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115 print_mcu (const avr_mcu_t *mcu)
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116 {
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117 const char *sp8_spec;
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118 const char *rcall_spec;
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119 const avr_mcu_t *arch_mcu;
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120 const avr_arch_t *arch;
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121 enum avr_arch_id arch_id = mcu->arch_id;
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122
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123 for (arch_mcu = mcu; arch_mcu->macro; )
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124 arch_mcu--;
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125 if (arch_mcu->arch_id != arch_id)
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126 exit (EXIT_FAILURE);
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127
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128 arch = &avr_arch_types[arch_id];
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129
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130 char name[100];
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131 if (snprintf (name, sizeof name, "specs-%s", mcu->name) >= (int) sizeof name)
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132 exit (EXIT_FAILURE);
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133
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134 FILE *f = fopen (name ,"w");
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135
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131
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136 bool absdata = (mcu->dev_attribute & AVR_ISA_LDS) != 0;
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137 bool errata_skip = (mcu->dev_attribute & AVR_ERRATA_SKIP) != 0;
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138 bool rmw = (mcu->dev_attribute & AVR_ISA_RMW) != 0;
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139 bool sp8 = (mcu->dev_attribute & AVR_SHORT_SP) != 0;
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140 bool rcall = (mcu->dev_attribute & AVR_ISA_RCALL);
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131
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141 bool is_arch = mcu->macro == NULL;
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142 bool is_device = ! is_arch;
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143
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144 if (is_arch
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145 && (ARCH_AVR2 == arch_id
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146 || ARCH_AVR25 == arch_id))
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147 {
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148 // Leave "avr2" and "avr25" alone. These two architectures are
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149 // the only ones that mix devices with 8-bit SP and 16-bit SP.
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150 sp8_spec = "";
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151 }
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152 else
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153 {
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154 sp8_spec = sp8 ? "-msp8" :"%<msp8";
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155 }
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156
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157 if (is_arch
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158 && ARCH_AVRXMEGA3 == arch_id)
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159 {
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160 // Leave "avrxmega3" alone. This architectures is the only one
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161 // that mixes devices with and without JMP / CALL.
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162 rcall_spec = "";
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163 }
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164 else
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165 {
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166 rcall_spec = rcall ? "-mshort-calls" : "%<mshort-calls";
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167 }
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168
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169 fprintf (f, "#\n"
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170 "# Auto-generated specs for AVR ");
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171 if (is_arch)
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172 fprintf (f, "core architecture %s\n", arch->name);
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173 else
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174 fprintf (f, "device %s (core %s, %d-bit SP%s)\n", mcu->name,
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175 arch->name, sp8 ? 8 : 16, rcall ? ", short-calls" : "");
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176 fprintf (f, "%s\n", header);
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177
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178 if (is_device)
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179 fprintf (f, "%s\n", help_copy_paste);
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180
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181 #if defined (WITH_AVRLIBC)
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182 // AVR-LibC specific. See avrlibc.h for the specs using them as subspecs.
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183
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184 if (is_device)
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185 {
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186 fprintf (f, "*avrlibc_startfile:\n");
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187 fprintf (f, "\tcrt%s.o%%s", mcu->name);
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188 fprintf (f, "\n\n");
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189
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190 fprintf (f, "*avrlibc_devicelib:\n");
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191 fprintf (f, "\t%%{!nodevicelib:-l%s}", mcu->name);
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192 fprintf (f, "\n\n");
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193 }
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194 #endif // WITH_AVRLIBC
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195
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196 // avr-gcc specific specs for the compilation / the compiler proper.
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197
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198 int n_flash = 1 + (mcu->flash_size - 1) / 0x10000;
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199
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200 fprintf (f, "*cc1_n_flash:\n"
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201 "\t%%{!mn-flash=*:-mn-flash=%d}\n\n", n_flash);
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202
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203 fprintf (f, "*cc1_rmw:\n%s\n\n", rmw
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204 ? "\t%{!mno-rmw: -mrmw}"
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205 : "\t%{mrmw}");
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206
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207 fprintf (f, "*cc1_errata_skip:\n%s\n\n", errata_skip
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208 ? "\t%{!mno-skip-bug: -mskip-bug}"
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209 : "\t%{!mskip-bug: -mno-skip-bug}");
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210
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211 fprintf (f, "*cc1_absdata:\n%s\n\n", absdata
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212 ? "\t%{!mno-absdata: -mabsdata}"
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213 : "\t%{mabsdata}");
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214
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215 // avr-gcc specific specs for assembling / the assembler.
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216
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217 fprintf (f, "*asm_arch:\n\t-mmcu=%s\n\n", arch->name);
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218
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219 #ifdef HAVE_AS_AVR_MLINK_RELAX_OPTION
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220 fprintf (f, "*asm_relax:\n\t%s\n\n", ASM_RELAX_SPEC);
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221 #endif // have avr-as --mlink-relax
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222
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223 #ifdef HAVE_AS_AVR_MRMW_OPTION
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224 fprintf (f, "*asm_rmw:\n%s\n\n", rmw
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225 ? "\t%{!mno-rmw: -mrmw}"
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226 : "\t%{mrmw}");
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227 #endif // have avr-as -mrmw
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228
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229 #ifdef HAVE_AS_AVR_MGCCISR_OPTION
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230 fprintf (f, "*asm_gccisr:\n%s\n\n",
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231 "\t%{!mno-gas-isr-prologues: -mgcc-isr}");
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232 #endif // have avr-as -mgcc-isr
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233
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234 fprintf (f, "*asm_errata_skip:\n%s\n\n", errata_skip
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235 ? "\t%{mno-skip-bug}"
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236 : "\t%{!mskip-bug: -mno-skip-bug}");
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237
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238 // avr-specific specs for linking / the linker.
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239
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240 int wrap_k =
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241 mcu->flash_size == 0x2000 ? 8
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242 : mcu->flash_size == 0x4000 ? 16
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243 : mcu->flash_size == 0x8000 ? 32
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244 : mcu->flash_size == 0x10000 ? 64
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245 : 0;
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246
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247 fprintf (f, "*link_pmem_wrap:\n");
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248 if (wrap_k == 8)
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249 fprintf (f, "\t%%{!mno-pmem-wrap-around: --pmem-wrap-around=8k}");
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250 else if (wrap_k > 8)
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251 fprintf (f, "\t%%{mpmem-wrap-around: --pmem-wrap-around=%dk}", wrap_k);
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252 fprintf (f, "\n\n");
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253
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254 fprintf (f, "*link_relax:\n\t%s\n\n", LINK_RELAX_SPEC);
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255
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256 fprintf (f, "*link_arch:\n\t%s\n\n", LINK_ARCH_SPEC);
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257
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258 if (is_device)
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259 {
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260 fprintf (f, "*link_data_start:\n");
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261 if (mcu->data_section_start
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262 != arch->default_data_section_start)
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263 fprintf (f, "\t%%{!Tdata:-Tdata 0x%lX}",
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264 0x800000UL + mcu->data_section_start);
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265 fprintf (f, "\n\n");
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266
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267 fprintf (f, "*link_text_start:\n");
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268 if (mcu->text_section_start != 0x0)
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269 fprintf (f, "\t%%{!Ttext:-Ttext 0x%lX}", 0UL + mcu->text_section_start);
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270 fprintf (f, "\n\n");
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271 }
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272
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273 // Specs known to GCC.
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274
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275 if (is_device)
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276 {
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277 fprintf (f, "*self_spec:\n");
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278 fprintf (f, "\t%%{!mmcu=avr*: %%<mmcu=* -mmcu=%s} ", arch->name);
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279 fprintf (f, "%s ", rcall_spec);
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280 fprintf (f, "%s\n\n", sp8_spec);
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281
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282 #if defined (WITH_AVRLIBC)
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283 fprintf (f, "%s\n", help_dev_lib_name);
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284 #endif // WITH_AVRLIBC
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285
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286 fprintf (f, "*cpp:\n");
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287 fprintf (f, "\t-D%s -D__AVR_DEVICE_NAME__=%s", mcu->macro, mcu->name);
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288 fprintf (f, "\n\n");
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289 }
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290
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291 fprintf (f, "# End of file\n");
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292
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293 fclose (f);
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294 }
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295
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296
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297 int main (void)
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298 {
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299 for (const avr_mcu_t *mcu = avr_mcu_types; mcu->name; mcu++)
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300 print_mcu (mcu);
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301
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302 return EXIT_SUCCESS;
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303 }
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