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Diffstat (limited to 'src/lib/fallback_boot.c')
-rw-r--r--src/lib/fallback_boot.c25
1 files changed, 15 insertions, 10 deletions
diff --git a/src/lib/fallback_boot.c b/src/lib/fallback_boot.c
index 74572df323..203071fc8a 100644
--- a/src/lib/fallback_boot.c
+++ b/src/lib/fallback_boot.c
@@ -8,23 +8,28 @@
static void set_boot_successful(void)
{
- /* Remember I successfully booted by setting
- * the initial boot direction
- * to the direction that I booted.
- */
- unsigned char index, byte;
+ uint8_t index, byte;
+
index = inb(RTC_PORT(0)) & 0x80;
index |= RTC_BOOT_BYTE;
outb(index, RTC_PORT(0));
byte = inb(RTC_PORT(1));
- byte &= 0xfe;
- byte |= (byte & (1 << 1)) >> 1;
- /* If we are in normal mode set the boot count to 0 */
- if (!IS_ENABLED(CONFIG_SKIP_MAX_REBOOT_CNT_CLEAR))
- if(byte & 1)
+ if (IS_ENABLED(CONFIG_SKIP_MAX_REBOOT_CNT_CLEAR)) {
+ /* Set the fallback boot bit to allow for recovery if
+ * the payload fails to boot.
+ * It is the responsibility of the payload to reset
+ * the normal boot bit to 1 if desired
+ */
+ byte &= ~RTC_BOOT_NORMAL;
+ } else {
+ /* If we are in normal mode set the boot count to 0 */
+ if (byte & RTC_BOOT_NORMAL)
byte &= 0x0f;
+
+ }
+
outb(byte, RTC_PORT(1));
}
#else