blob: bf10fb099927456ce70f3dff0ffa00736730d4ef [file] [log] [blame] [edit]
/*
* Copyright (c) 2022 Intel Corporation
*
* SPDX-License-Identifier: Apache-2.0
*/
/**
* @file
* @brief EFI console driver
*
* @details EFI console driver.
* Hooks into the printk and fputc (for printf) modules.
*/
#include <stdio.h>
#include <zephyr/device.h>
#include <zephyr/init.h>
#include <zephyr/sys/printk.h>
extern int efi_console_putchar(int c);
#if defined(CONFIG_PRINTK) || defined(CONFIG_STDOUT_CONSOLE)
/**
*
* @brief Output one character to EFI console
*
* Outputs both line feed and carriage return in the case of a '\n'.
*
* @param c Character to output
*
* @return The character passed as input.
*/
static int console_out(int c)
{
return efi_console_putchar(c);
}
#endif
#if defined(CONFIG_STDOUT_CONSOLE)
extern void __stdout_hook_install(int (*hook)(int));
#endif
#if defined(CONFIG_PRINTK)
extern void __printk_hook_install(int (*fn)(int));
#endif
/**
* @brief Install printk/stdout hook for EFI console output
*/
static void efi_console_hook_install(void)
{
#if defined(CONFIG_STDOUT_CONSOLE)
__stdout_hook_install(console_out);
#endif
#if defined(CONFIG_PRINTK)
__printk_hook_install(console_out);
#endif
}
/**
* @brief Initialize one EFI as the console port
*
* @return 0 if successful, otherwise failed.
*/
static int efi_console_init(void)
{
efi_console_hook_install();
return 0;
}
/* EFI console initializes */
SYS_INIT(efi_console_init,
PRE_KERNEL_1,
0);