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/*
* Copyright (c) 2017 Richard Braun.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*
* Device-independent console interface.
*/
#ifndef _KERN_CONSOLE_H
#define _KERN_CONSOLE_H
#include <kern/list.h>
#include <kern/spinlock.h>
struct console;
/*
* Type for character writing functions.
*/
typedef void (*console_putc_fn)(struct console *console, char c);
#define CONSOLE_NAME_SIZE 16
/*
* Console device.
*
* This structure should be embedded in the hardware-specific console
* objects. Calls to console operations are all serialized by this module
* for each device. Interrupts are disabled when calling operations.
*/
struct console {
struct spinlock lock;
struct list node;
console_putc_fn putc;
char name[CONSOLE_NAME_SIZE];
};
/*
* Console initialization.
*/
void console_init(struct console *console, const char *name,
console_putc_fn putc);
/*
* Initialize the console module.
*/
void console_setup(void);
/*
* Register a console device.
*
* The given console must be initialized before calling this function.
*
* This function isn't thread-safe and can only be called during system
* initialization.
*/
void console_register(struct console *console);
/*
* Write a single character to all registered console devices.
*/
void console_write_char(char c);
#endif /* _KERN_CONSOLE_H */
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