src/arch/x86/init/bootblock_normal.c

   1 #include <bootblock_common.h>
   2 #include <pc80/mc146818rtc.h>
   3
   4 static const char *get_fallback(const char *stagelist) {
   5         while (*stagelist) stagelist++;
   6         return ++stagelist;
   7 }
   8
   9 static void main(unsigned long bist)
  10 {
  11         unsigned long entry;
  12         int boot_mode;
  13         const char *default_filenames = "normal/romstage\0fallback/romstage";
  14
  15         if (boot_cpu()) {
  16                 bootblock_northbridge_init();
  17                 bootblock_southbridge_init();
  18                 bootblock_cpu_init();
  19
  20 #if CONFIG_USE_OPTION_TABLE
  21                 sanitize_cmos();
  22 #endif
  23                 boot_mode = do_normal_boot();
  24         } else {
  25
  26                 /* Questionable single byte read from CMOS.
  27                  * Do not add any other CMOS access in the
  28                  * bootblock for AP CPUs.
  29                  */
  30                 boot_mode = last_boot_normal();
  31         }
  32
  33         char *filenames = (char *)walkcbfs("coreboot-stages");
  34         if (!filenames) {
  35                 filenames = default_filenames;
  36         }
  37         char *normal_candidate = filenames;
  38
  39         if (boot_mode)
  40                 entry = findstage(normal_candidate);
  41         else
  42                 entry = findstage(get_fallback(normal_candidate));
  43
  44         if (entry) call(entry, bist);
  45
  46         /* run fallback if normal can't be found */
  47         entry = findstage(get_fallback(normal_candidate));
  48         if (entry) call(entry, bist);
  49
  50         /* duh. we're stuck */
  51         asm volatile ("1:\n\thlt\n\tjmp 1b\n\t");
  52 }
  53