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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/>.
*/
#include <stddef.h>
#include <kern/assert.h>
#include <kern/init.h>
#include <kern/console.h>
#include <kern/list.h>
#include <kern/spinlock.h>
static struct list console_devs;
static struct spinlock console_lock;
static void
console_putc(struct console *console, char c)
{
unsigned long flags;
spinlock_lock_intr_save(&console->lock, &flags);
console->putc(console, c);
spinlock_unlock_intr_restore(&console->lock, flags);
}
void __init
console_setup(void)
{
list_init(&console_devs);
spinlock_init(&console_lock);
}
void __init
console_register(struct console *console)
{
assert(console->putc != NULL);
spinlock_lock(&console_lock);
list_insert_tail(&console_devs, &console->node);
spinlock_unlock(&console_lock);
}
void
console_write_char(char c)
{
struct console *console;
unsigned long flags;
spinlock_lock_intr_save(&console_lock, &flags);
list_for_each_entry(&console_devs, console, node) {
console_putc(console, c);
}
spinlock_unlock_intr_restore(&console_lock, flags);
}
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