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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [gcc/] [config/] [arm/] [driver-arm.c] - Rev 758
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/* Subroutines for the gcc driver. Copyright (C) 2011 Free Software Foundation, Inc. This file is part of GCC. GCC is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3, or (at your option) any later version. GCC is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with GCC; see the file COPYING3. If not see <http://www.gnu.org/licenses/>. */ #include "config.h" #include "system.h" #include "coretypes.h" #include "tm.h" #include "configargs.h" struct vendor_cpu { const char *part_no; const char *arch_name; const char *cpu_name; }; static struct vendor_cpu arm_cpu_table[] = { {"0x926", "armv5te", "arm926ej-s"}, {"0xa26", "armv5te", "arm1026ej-s"}, {"0xb02", "armv6k", "mpcore"}, {"0xb36", "armv6j", "arm1136j-s"}, {"0xb56", "armv6t2", "arm1156t2-s"}, {"0xb76", "armv6zk", "arm1176jz-s"}, {"0xc05", "armv7-a", "cortex-a5"}, {"0xc08", "armv7-a", "cortex-a8"}, {"0xc09", "armv7-a", "cortex-a9"}, {"0xc0f", "armv7-a", "cortex-a15"}, {"0xc14", "armv7-r", "cortex-r4"}, {"0xc15", "armv7-r", "cortex-r5"}, {"0xc20", "armv6-m", "cortex-m0"}, {"0xc21", "armv6-m", "cortex-m1"}, {"0xc23", "armv7-m", "cortex-m3"}, {"0xc24", "armv7e-m", "cortex-m4"}, {NULL, NULL, NULL} }; static struct { const char *vendor_no; const struct vendor_cpu *vendor_parts; } vendors[] = { {"0x41", arm_cpu_table}, {NULL, NULL} }; /* This will be called by the spec parser in gcc.c when it sees a %:local_cpu_detect(args) construct. Currently it will be called with either "arch", "cpu" or "tune" as argument depending on if -march=native, -mcpu=native or -mtune=native is to be substituted. It returns a string containing new command line parameters to be put at the place of the above two options, depending on what CPU this is executed. E.g. "-march=armv7-a" on a Cortex-A8 for -march=native. If the routine can't detect a known processor, the -march or -mtune option is discarded. ARGC and ARGV are set depending on the actual arguments given in the spec. */ const char * host_detect_local_cpu (int argc, const char **argv) { const char *val = NULL; char buf[128]; FILE *f = NULL; bool arch; const struct vendor_cpu *cpu_table = NULL; if (argc < 1) goto not_found; arch = strcmp (argv[0], "arch") == 0; if (!arch && strcmp (argv[0], "cpu") != 0 && strcmp (argv[0], "tune")) goto not_found; f = fopen ("/proc/cpuinfo", "r"); if (f == NULL) goto not_found; while (fgets (buf, sizeof (buf), f) != NULL) { /* Ensure that CPU implementer is ARM (0x41). */ if (strncmp (buf, "CPU implementer", sizeof ("CPU implementer") - 1) == 0) { int i; for (i = 0; vendors[i].vendor_no != NULL; i++) if (strstr (buf, vendors[i].vendor_no) != NULL) { cpu_table = vendors[i].vendor_parts; break; } } /* Detect arch/cpu. */ if (strncmp (buf, "CPU part", sizeof ("CPU part") - 1) == 0) { int i; if (cpu_table == NULL) goto not_found; for (i = 0; cpu_table[i].part_no != NULL; i++) if (strstr (buf, cpu_table[i].part_no) != NULL) { val = arch ? cpu_table[i].arch_name : cpu_table[i].cpu_name; break; } break; } } fclose (f); if (val == NULL) goto not_found; return concat ("-m", argv[0], "=", val, NULL); not_found: { unsigned int i; unsigned int opt; const char *search[] = {NULL, "arch"}; if (f) fclose (f); search[0] = argv[0]; for (opt = 0; opt < ARRAY_SIZE (search); opt++) for (i = 0; i < ARRAY_SIZE (configure_default_options); i++) if (strcmp (configure_default_options[i].name, search[opt]) == 0) return concat ("-m", search[opt], "=", configure_default_options[i].value, NULL); return NULL; } }
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