1 /* Subroutines for the gcc driver. 2 Copyright (C) 2011-2017 Free Software Foundation, Inc. 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 "config.h" 21 #include "system.h" 22 #include "coretypes.h" 23 #include "tm.h" 24 #include "configargs.h" 25 26 struct vendor_cpu { 27 const char *part_no; 28 const char *arch_name; 29 const char *cpu_name; 30 }; 31 32 static struct vendor_cpu arm_cpu_table[] = { 33 {"0x926", "armv5te", "arm926ej-s"}, 34 {"0xa26", "armv5te", "arm1026ej-s"}, 35 {"0xb02", "armv6k", "mpcore"}, 36 {"0xb36", "armv6j", "arm1136j-s"}, 37 {"0xb56", "armv6t2", "arm1156t2-s"}, 38 /* armv6kz is the correct spelling for ARMv6KZ but may not be supported in 39 the version of binutils used. The incorrect spelling is supported in 40 legacy and current binutils so that is used instead. */ 41 {"0xb76", "armv6zk", "arm1176jz-s"}, 42 {"0xc05", "armv7-a", "cortex-a5"}, 43 {"0xc07", "armv7ve", "cortex-a7"}, 44 {"0xc08", "armv7-a", "cortex-a8"}, 45 {"0xc09", "armv7-a", "cortex-a9"}, 46 {"0xc0d", "armv7ve", "cortex-a12"}, 47 {"0xc0e", "armv7ve", "cortex-a17"}, 48 {"0xc0f", "armv7ve", "cortex-a15"}, 49 {"0xd01", "armv8-a+crc", "cortex-a32"}, 50 {"0xd04", "armv8-a+crc", "cortex-a35"}, 51 {"0xd03", "armv8-a+crc", "cortex-a53"}, 52 {"0xd07", "armv8-a+crc", "cortex-a57"}, 53 {"0xd08", "armv8-a+crc", "cortex-a72"}, 54 {"0xd09", "armv8-a+crc", "cortex-a73"}, 55 {"0xc14", "armv7-r", "cortex-r4"}, 56 {"0xc15", "armv7-r", "cortex-r5"}, 57 {"0xc20", "armv6-m", "cortex-m0"}, 58 {"0xc21", "armv6-m", "cortex-m1"}, 59 {"0xc23", "armv7-m", "cortex-m3"}, 60 {"0xc24", "armv7e-m", "cortex-m4"}, 61 {NULL, NULL, NULL} 62 }; 63 64 static struct { 65 const char *vendor_no; 66 const struct vendor_cpu *vendor_parts; 67 } vendors[] = { 68 {"0x41", arm_cpu_table}, 69 {NULL, NULL} 70 }; 71 72 /* This will be called by the spec parser in gcc.c when it sees 73 a %:local_cpu_detect(args) construct. Currently it will be called 74 with either "arch", "cpu" or "tune" as argument depending on if 75 -march=native, -mcpu=native or -mtune=native is to be substituted. 76 77 It returns a string containing new command line parameters to be 78 put at the place of the above two options, depending on what CPU 79 this is executed. E.g. "-march=armv7-a" on a Cortex-A8 for 80 -march=native. If the routine can't detect a known processor, 81 the -march or -mtune option is discarded. 82 83 ARGC and ARGV are set depending on the actual arguments given 84 in the spec. */ 85 const char * 86 host_detect_local_cpu (int argc, const char **argv) 87 { 88 const char *val = NULL; 89 char buf[128]; 90 FILE *f = NULL; 91 bool arch; 92 const struct vendor_cpu *cpu_table = NULL; 93 94 if (argc < 1) 95 goto not_found; 96 97 arch = strcmp (argv[0], "arch") == 0; 98 if (!arch && strcmp (argv[0], "cpu") != 0 && strcmp (argv[0], "tune")) 99 goto not_found; 100 101 f = fopen ("/proc/cpuinfo", "r"); 102 if (f == NULL) 103 goto not_found; 104 105 while (fgets (buf, sizeof (buf), f) != NULL) 106 { 107 /* Ensure that CPU implementer is ARM (0x41). */ 108 if (strncmp (buf, "CPU implementer", sizeof ("CPU implementer") - 1) == 0) 109 { 110 int i; 111 for (i = 0; vendors[i].vendor_no != NULL; i++) 112 if (strstr (buf, vendors[i].vendor_no) != NULL) 113 { 114 cpu_table = vendors[i].vendor_parts; 115 break; 116 } 117 } 118 119 /* Detect arch/cpu. */ 120 if (strncmp (buf, "CPU part", sizeof ("CPU part") - 1) == 0) 121 { 122 int i; 123 124 if (cpu_table == NULL) 125 goto not_found; 126 127 for (i = 0; cpu_table[i].part_no != NULL; i++) 128 if (strstr (buf, cpu_table[i].part_no) != NULL) 129 { 130 val = arch ? cpu_table[i].arch_name : cpu_table[i].cpu_name; 131 break; 132 } 133 break; 134 } 135 } 136 137 if (val) 138 { 139 fclose (f); 140 return concat ("-m", argv[0], "=", val, NULL); 141 } 142 143 not_found: 144 { 145 unsigned int i; 146 unsigned int opt; 147 const char *search[] = {NULL, "arch"}; 148 149 if (f) 150 fclose (f); 151 152 search[0] = argv[0]; 153 for (opt = 0; opt < ARRAY_SIZE (search); opt++) 154 for (i = 0; i < ARRAY_SIZE (configure_default_options); i++) 155 if (strcmp (configure_default_options[i].name, search[opt]) == 0) 156 return concat ("-m", search[opt], "=", 157 configure_default_options[i].value, NULL); 158 return NULL; 159 } 160 } 161