linux/arch/x86/boot/early_serial_console.c

// SPDX-License-Identifier: GPL-2.0
/*
 * Serial port routines for use during early boot reporting. This code is
 * included from both the compressed kernel and the regular kernel.
 */
#include "boot.h"

#define DEFAULT_SERIAL_PORT …

#define DLAB …

#define TXR …
#define RXR …
#define IER …
#define IIR …
#define FCR …
#define LCR …
#define MCR …
#define LSR …
#define MSR …
#define DLL …
#define DLH …

#define DEFAULT_BAUD …

static void early_serial_init(int port, int baud)
{ … }

static void parse_earlyprintk(void)
{ … }

#define BASE_BAUD …
static unsigned int probe_baud(int port)
{ … }

static void parse_console_uart8250(void)
{ … }

void console_init(void)
{ … }