Debug port console. More...

#include <stdint.h>
#include <ipxe/io.h>
#include <ipxe/console.h>
#include <ipxe/init.h>
#include <config/console.h>

Macros
#define	DEBUG_PORT 0xe9
	Debug port.
#define	DEBUG_PORT_CHECK 0xe9
	Debug port installation check magic value.
#define	CONSOLE_DEBUGCON ( CONSOLE_USAGE_ALL & ~CONSOLE_USAGE_TUI )

Functions
	FILE_LICENCE (GPL2_OR_LATER_OR_UBDL)
static void	debugcon_putchar (int character)
	Print a character to debug port console.
static void	debugcon_init (void)
	Initialise debug port console.
struct init_fn debugcon_init_fn	__init_fn (INIT_EARLY)
	Debug port console initialisation function.

Variables
struct console_driver debugcon_console	__console_driver
	Debug port console driver.

Detailed Description

Debug port console.

The debug port is supported by bochs (via the "port_e9_hack" configuration file directive) and by qemu (via the "-debugcon" command-line option).

Definition in file debugcon.c.

Macro Definition Documentation

◆ DEBUG_PORT

#define DEBUG_PORT 0xe9

Debug port.

Definition at line 42 of file debugcon.c.

Referenced by debugcon_init(), and debugcon_putchar().

◆ DEBUG_PORT_CHECK

#define DEBUG_PORT_CHECK 0xe9

Debug port installation check magic value.

Definition at line 45 of file debugcon.c.

Referenced by debugcon_init().

◆ CONSOLE_DEBUGCON

#define CONSOLE_DEBUGCON ( CONSOLE_USAGE_ALL & ~CONSOLE_USAGE_TUI )

Definition at line 50 of file debugcon.c.

Function Documentation

◆ FILE_LICENCE()

FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL )

◆ debugcon_putchar()

void debugcon_putchar ( int character )

static

Print a character to debug port console.

Parameters

character Character to be printed

Definition at line 58 of file debugcon.c.

                                               {
 
        /* Write character to debug port */
        outb ( character, DEBUG_PORT );
}

References DEBUG_PORT, and outb.

◆ debugcon_init()

void debugcon_init ( void )

static

Initialise debug port console.

Definition at line 74 of file debugcon.c.

                                   {
        uint8_t check;
 
        /* Check if console is present */
        check = inb ( DEBUG_PORT );
        if ( check != DEBUG_PORT_CHECK ) {
                DBG ( "Debug port not present; disabling console\n" );
                debugcon_console.disabled = CONSOLE_DISABLED;
        }
}

References CONSOLE_DISABLED, DBG, DEBUG_PORT, DEBUG_PORT_CHECK, and inb.

Referenced by __init_fn().

◆ __init_fn()

struct init_fn debugcon_init_fn __init_fn ( INIT_EARLY )

Debug port console initialisation function.

References __init_fn, debugcon_init(), and INIT_EARLY.

Variable Documentation

◆ __console_driver

struct console_driver debugcon_console __console_driver

Initial value:

= {
        .putchar = debugcon_putchar,
        .usage = CONSOLE_DEBUGCON,
}

Debug port console driver.

Definition at line 65 of file debugcon.c.

                                                          {
        .putchar = debugcon_putchar,
        .usage = CONSOLE_DEBUGCON,
};

Macros

Functions

Variables