src/lib/fallback_boot.c

   1 #include <console/console.h>
   2 #include <fallback.h>
   3 #include <watchdog.h>
   4 #include <arch/io.h>
   5
   6 #if CONFIG_PC80_SYSTEM
   7 #include <pc80/mc146818rtc.h>
   8
   9 static void set_boot_successful(void)
  10 {
  11         uint8_t index, byte;
  12
  13         index = inb(RTC_PORT(0)) & 0x80;
  14         index |= RTC_BOOT_BYTE;
  15         outb(index, RTC_PORT(0));
  16
  17         byte = inb(RTC_PORT(1));
  18
  19         if (IS_ENABLED(CONFIG_SKIP_MAX_REBOOT_CNT_CLEAR)) {
  20                 /* Set the fallback boot bit to allow for recovery if
  21                  * the payload fails to boot.
  22                  * It is the responsibility of the payload to reset
  23                  * the normal boot bit to 1 if desired
  24                  */
  25                 byte &= ~RTC_BOOT_NORMAL;
  26         } else {
  27                 /* If we are in normal mode set the boot count to 0 */
  28                 if (byte & RTC_BOOT_NORMAL)
  29                         byte &= 0x0f;
  30
  31         }
  32
  33         outb(byte, RTC_PORT(1));
  34 }
  35 #else
  36 static void set_boot_successful(void)
  37 {
  38         /* To be implemented */
  39 }
  40 #endif
  41
  42 void boot_successful(void)
  43 {
  44 #if CONFIG_FRAMEBUFFER_SET_VESA_MODE && !CONFIG_FRAMEBUFFER_KEEP_VESA_MODE
  45         void vbe_textmode_console(void);
  46
  47         vbe_textmode_console();
  48 #endif
  49         /* Remember this was a successful boot */
  50         set_boot_successful();
  51
  52         /* turn off the boot watchdog */
  53         watchdog_off();
  54 }