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/*
* Copyright (c) 2010-2019 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 <stdio.h>
#include <kern/console.h>
#include <kern/fmt.h>
#include <kern/init.h>
#include <kern/spinlock.h>
#include <machine/boot.h>
#include <machine/cpu.h>
/*
* Size of the static buffer.
*/
#define PRINTF_BUFSIZE 1024
static char printf_buffer[PRINTF_BUFSIZE];
static struct spinlock printf_lock;
static int
vprintf_common(const char *format, va_list ap)
{
int length;
length = fmt_vsnprintf(printf_buffer, sizeof(printf_buffer), format, ap);
for (char *ptr = printf_buffer; *ptr != '\0'; ptr++) {
console_putchar(*ptr);
}
return length;
}
int
printf(const char *format, ...)
{
va_list ap;
int length;
va_start(ap, format);
length = vprintf(format, ap);
va_end(ap);
return length;
}
int
vprintf(const char *format, va_list ap)
{
unsigned long flags;
int length;
spinlock_lock_intr_save(&printf_lock, &flags);
length = vprintf_common(format, ap);
spinlock_unlock_intr_restore(&printf_lock, flags);
return length;
}
int
printf_ln(const char *format, ...)
{
va_list ap;
int length;
va_start(ap, format);
length = vprintf_ln(format, ap);
va_end(ap);
return length;
}
int
vprintf_ln(const char *format, va_list ap)
{
unsigned long flags;
int length;
spinlock_lock_intr_save(&printf_lock, &flags);
length = vprintf_common(format, ap);
console_putchar('\n');
spinlock_unlock_intr_restore(&printf_lock, flags);
return length;
}
static int __init
printf_setup(void)
{
spinlock_init(&printf_lock);
return 0;
}
INIT_OP_DEFINE(printf_setup,
INIT_OP_DEP(boot_bootstrap_console, true),
INIT_OP_DEP(console_bootstrap, true),
INIT_OP_DEP(spinlock_setup, true));
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