diff --git a/man/loader.conf.xml b/man/loader.conf.xml
index 579eaddebe..844bd631fc 100644
--- a/man/loader.conf.xml
+++ b/man/loader.conf.xml
@@ -196,6 +196,13 @@
by using the f key.
+
+ beep
+
+ Beep once as soon as the boot menu is shown (default disabled). Currently,
+ only x86 is supported, where it uses the PC speaker.
+
+
reboot-for-bitlocker
diff --git a/src/boot/efi/boot.c b/src/boot/efi/boot.c
index c07f629939..a128b38b9c 100644
--- a/src/boot/efi/boot.c
+++ b/src/boot/efi/boot.c
@@ -89,6 +89,7 @@ typedef struct {
BOOLEAN force_menu;
BOOLEAN use_saved_entry;
BOOLEAN use_saved_entry_efivar;
+ BOOLEAN beep;
INT64 console_mode;
INT64 console_mode_efivar;
RandomSeedMode random_seed_mode;
@@ -497,6 +498,7 @@ static void print_status(Config *config, CHAR16 *loaded_image_path) {
ps_bool(L" editor: %s\n", config->editor);
ps_bool(L" auto-entries: %s\n", config->auto_entries);
ps_bool(L" auto-firmware: %s\n", config->auto_firmware);
+ ps_bool(L" beep: %s\n", config->beep);
ps_bool(L" reboot-for-bitlocker: %s\n", config->reboot_for_bitlocker);
ps_string(L" random-seed-mode: %s\n", random_seed_modes_table[config->random_seed_mode]);
@@ -588,7 +590,7 @@ static BOOLEAN menu_run(
_cleanup_freepool_ CHAR16 *clearline = NULL, *status = NULL;
UINT32 timeout_efivar_saved = config->timeout_sec_efivar;
UINT32 timeout_remain = config->timeout_sec == TIMEOUT_MENU_FORCE ? 0 : config->timeout_sec;
- BOOLEAN exit = FALSE, run = TRUE, firmware_setup = FALSE;
+ BOOLEAN exit = FALSE, run = TRUE, firmware_setup = FALSE, do_beep = config->beep;
INT64 console_mode_initial = ST->ConOut->Mode->Mode, console_mode_efivar_saved = config->console_mode_efivar;
UINTN default_efivar_saved = config->idx_default_efivar;
@@ -725,6 +727,11 @@ static BOOLEAN menu_run(
ST->ConOut->OutputString(ST->ConOut, clearline + 1 + x + len);
}
+ if (do_beep) {
+ beep();
+ do_beep = FALSE;
+ }
+
err = console_key_read(&key, timeout_remain > 0 ? 1000 * 1000 : UINT64_MAX);
if (err == EFI_TIMEOUT) {
timeout_remain--;
@@ -1144,6 +1151,12 @@ static void config_defaults_load_from_file(Config *config, CHAR8 *content) {
continue;
}
+ if (strcmpa((CHAR8 *)"beep", key) == 0) {
+ err = parse_boolean(value, &config->beep);
+ if (EFI_ERROR(err))
+ log_error_stall(L"Error parsing 'beep' config option: %a", value);
+ }
+
if (strcmpa((CHAR8 *)"reboot-for-bitlocker", key) == 0) {
err = parse_boolean(value, &config->reboot_for_bitlocker);
if (EFI_ERROR(err))
diff --git a/src/boot/efi/util.c b/src/boot/efi/util.c
index 177c1b3d9a..42c28badbf 100644
--- a/src/boot/efi/util.c
+++ b/src/boot/efi/util.c
@@ -757,3 +757,46 @@ __attribute__((noinline)) void debug_break(void) {
#endif
}
#endif
+
+#if defined(__i386__) || defined(__x86_64__)
+static inline UINT8 inb(UINT16 port) {
+ UINT8 value;
+ asm volatile("inb %1, %0" : "=a"(value) : "Nd"(port));
+ return value;
+}
+
+static inline void outb(UINT16 port, UINT8 value) {
+ asm volatile("outb %0, %1" : : "a"(value), "Nd"(port));
+}
+
+void beep(void) {
+ enum {
+ PITCH = 500,
+ DURATION_USEC = 100 * 1000,
+
+ PIT_FREQUENCY = 0x1234dd,
+ SPEAKER_CONTROL_PORT = 0x61,
+ SPEAKER_ON_MASK = 0x03,
+ TIMER_PORT_MAGIC = 0xB6,
+ TIMER_CONTROL_PORT = 0x43,
+ TIMER_CONTROL2_PORT = 0x42,
+ };
+
+ /* Set frequency. */
+ UINT32 counter = PIT_FREQUENCY / PITCH;
+ outb(TIMER_CONTROL_PORT, TIMER_PORT_MAGIC);
+ outb(TIMER_CONTROL2_PORT, counter & 0xFF);
+ outb(TIMER_CONTROL2_PORT, (counter >> 8) & 0xFF);
+
+ /* Turn speaker on. */
+ UINT8 value = inb(SPEAKER_CONTROL_PORT);
+ value |= SPEAKER_ON_MASK;
+ outb(SPEAKER_CONTROL_PORT, value);
+
+ BS->Stall(DURATION_USEC);
+
+ /* Turn speaker off. */
+ value &= ~SPEAKER_ON_MASK;
+ outb(SPEAKER_CONTROL_PORT, value);
+}
+#endif
diff --git a/src/boot/efi/util.h b/src/boot/efi/util.h
index 9e8db3e7c9..8cee20885e 100644
--- a/src/boot/efi/util.h
+++ b/src/boot/efi/util.h
@@ -169,3 +169,9 @@ extern UINT8 _text, _data;
#else
# define debug_hook(identity)
#endif
+
+#if defined(__i386__) || defined(__x86_64__)
+void beep(void);
+#else
+static inline void beep(void) {}
+#endif