arch/s390/tools/gen_facilities.c

   1 /*
   2  * Simple program to generate defines out of facility lists that use the bit
   3  * numbering scheme from the Princples of Operations: most significant bit
   4  * has bit number 0.
   5  *
   6  *    Copyright IBM Corp. 2015
   7  *
   8  */
   9
  10 #define S390_GEN_FACILITIES_C
  11
  12 #include <strings.h>
  13 #include <string.h>
  14 #include <stdlib.h>
  15 #include <stdio.h>
  16 #include <asm/facilities_src.h>
  17
  18 static void print_facility_list(struct facility_def *def)
  19 {
  20         unsigned int high, bit, dword, i;
  21         unsigned long long *array;
  22
  23         array = calloc(1, 8);
  24         if (!array)
  25                 exit(EXIT_FAILURE);
  26         high = 0;
  27         for (i = 0; def->bits[i] != -1; i++) {
  28                 bit = 63 - (def->bits[i] & 63);
  29                 dword = def->bits[i] / 64;
  30                 if (dword > high) {
  31                         array = realloc(array, (dword + 1) * 8);
  32                         if (!array)
  33                                 exit(EXIT_FAILURE);
  34                         memset(array + high + 1, 0, (dword - high) * 8);
  35                         high = dword;
  36                 }
  37                 array[dword] |= 1ULL << bit;
  38         }
  39         printf("#define %s ", def->name);
  40         for (i = 0; i <= high; i++)
  41                 printf("_AC(0x%016llx,UL)%c", array[i], i < high ? ',' : '\n');
  42         free(array);
  43 }
  44
  45 static void print_facility_lists(void)
  46 {
  47         unsigned int i;
  48
  49         for (i = 0; i < sizeof(facility_defs) / sizeof(facility_defs[0]); i++)
  50                 print_facility_list(&facility_defs[i]);
  51 }
  52
  53 int main(int argc, char **argv)
  54 {
  55         printf("#ifndef __ASM_S390_FACILITIES__\n");
  56         printf("#define __ASM_S390_FACILITIES__\n");
  57         printf("/*\n");
  58         printf(" * DO NOT MODIFY.\n");
  59         printf(" *\n");
  60         printf(" * This file was generated by %s\n", __FILE__);
  61         printf(" */\n\n");
  62         printf("#include <linux/const.h>\n\n");
  63         print_facility_lists();
  64         printf("\n#endif\n");
  65         return 0;
  66 }