mirror of
https://github.com/torvalds/linux.git
synced 2024-12-30 14:52:05 +00:00
bd119c6923
Disintegrate asm/system.h for Tile. Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Chris Metcalf <cmetcalf@tilera.com>
111 lines
2.7 KiB
C
111 lines
2.7 KiB
C
/*
|
|
* Copyright 2010 Tilera Corporation. All Rights Reserved.
|
|
*
|
|
* 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, version 2.
|
|
*
|
|
* 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, GOOD TITLE or
|
|
* NON INFRINGEMENT. See the GNU General Public License for
|
|
* more details.
|
|
*/
|
|
|
|
#include <linux/console.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <linux/string.h>
|
|
#include <linux/irqflags.h>
|
|
#include <asm/setup.h>
|
|
#include <hv/hypervisor.h>
|
|
|
|
static void early_hv_write(struct console *con, const char *s, unsigned n)
|
|
{
|
|
hv_console_write((HV_VirtAddr) s, n);
|
|
}
|
|
|
|
static struct console early_hv_console = {
|
|
.name = "earlyhv",
|
|
.write = early_hv_write,
|
|
.flags = CON_PRINTBUFFER,
|
|
.index = -1,
|
|
};
|
|
|
|
/* Direct interface for emergencies */
|
|
static struct console *early_console = &early_hv_console;
|
|
static int early_console_initialized;
|
|
static int early_console_complete;
|
|
|
|
static void early_vprintk(const char *fmt, va_list ap)
|
|
{
|
|
char buf[512];
|
|
int n = vscnprintf(buf, sizeof(buf), fmt, ap);
|
|
early_console->write(early_console, buf, n);
|
|
}
|
|
|
|
void early_printk(const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
va_start(ap, fmt);
|
|
early_vprintk(fmt, ap);
|
|
va_end(ap);
|
|
}
|
|
|
|
void early_panic(const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
arch_local_irq_disable_all();
|
|
va_start(ap, fmt);
|
|
early_printk("Kernel panic - not syncing: ");
|
|
early_vprintk(fmt, ap);
|
|
early_console->write(early_console, "\n", 1);
|
|
va_end(ap);
|
|
dump_stack();
|
|
hv_halt();
|
|
}
|
|
|
|
static int __initdata keep_early;
|
|
|
|
static int __init setup_early_printk(char *str)
|
|
{
|
|
if (early_console_initialized)
|
|
return 1;
|
|
|
|
if (str != NULL && strncmp(str, "keep", 4) == 0)
|
|
keep_early = 1;
|
|
|
|
early_console = &early_hv_console;
|
|
early_console_initialized = 1;
|
|
register_console(early_console);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void __init disable_early_printk(void)
|
|
{
|
|
early_console_complete = 1;
|
|
if (!early_console_initialized || !early_console)
|
|
return;
|
|
if (!keep_early) {
|
|
early_printk("disabling early console\n");
|
|
unregister_console(early_console);
|
|
early_console_initialized = 0;
|
|
} else {
|
|
early_printk("keeping early console\n");
|
|
}
|
|
}
|
|
|
|
void warn_early_printk(void)
|
|
{
|
|
if (early_console_complete || early_console_initialized)
|
|
return;
|
|
early_printk("\
|
|
Machine shutting down before console output is fully initialized.\n\
|
|
You may wish to reboot and add the option 'earlyprintk' to your\n\
|
|
boot command line to see any diagnostic early console output.\n\
|
|
");
|
|
}
|
|
|
|
early_param("earlyprintk", setup_early_printk);
|