Module serial

Structs§

ASYNC_OUTPUT 🔒
BOOT_LOG_PREFIX_ENABLED 🔒
CMDLINE_BUF 🔒: Fixed-size buffer for kernel cmdline (up to 2KB). SAFETY: Written once during early boot (single-threaded, IRQs disabled), then read-only. Safe for concurrent reads after initialization.
CMDLINE_LEN 🔒
CMDLINE_READY 🔒
FORCE_LOCK 🔒: Raw spinlock for _print_force to prevent multi-core character interleaving. Uses a ticket-style test-and-set: 0 = free, 1 = locked.
PANIC_IN_PROGRESS 🔒: Flag indicating if the kernel is in a panic state. When true, serial output bypasses all locks to ensure messages are displayed.
SERIAL1 🔒: Global serial port instance
SERIAL_AT_LINE_START 🔒
TX_DROPPED 🔒
TX_FORMAT 🔒
TX_QUEUE 🔒

dropped_output: Number of runtime output chunks/format attempts dropped under saturation.
enter_emergency_mode
force_lock_acquire 🔒
force_lock_release 🔒
get_cmdline: Returns the stored kernel cmdline for /proc/cmdline.
init: Initialize the serial port
is_hex_word 🔒: Returns whether hex word.
is_token_char 🔒: Returns whether token char.
parse_cmdline^⚠: Parse kernel cmdline from UEFI bootloader boot arguments.
putc: Signal that the kernel has entered an emergency panic state. Write one raw byte to COM1 (used by debug breadcrumbs).
serial_task_main: Drain bounded bursts without waiting for the UART or yielding under its lock.
set_boot_log_prefix_enabled: Enable or disable Linux-style boot timestamps at the beginning of each line.