/* Define EARLY_BOOTUP_DEBUG to debug kernel related boot problems.
* On production kernels EARLY_BOOTUP_DEBUG should be undefined. */
-#undef EARLY_BOOTUP_DEBUG
+#define EARLY_BOOTUP_DEBUG
-#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/console.h>
#include <linux/string.h>
#include <linux/init.h>
-#include <linux/delay.h>
-#include <linux/sched.h>
-#include <linux/interrupt.h>
#include <linux/major.h>
#include <linux/tty.h>
-#include <asm/page.h>
-#include <asm/types.h>
-#include <asm/system.h>
#include <asm/pdc.h> /* for iodc_call() proto and friends */
+static DEFINE_SPINLOCK(pdc_console_lock);
static void pdc_console_write(struct console *co, const char *s, unsigned count)
{
- while(count--)
- pdc_iodc_putc(*s++);
+ int i = 0;
+ unsigned long flags;
+
+ spin_lock_irqsave(&pdc_console_lock, flags);
+ do {
+ i += pdc_iodc_print(s + i, count - i);
+ } while (i < count);
+ spin_unlock_irqrestore(&pdc_console_lock, flags);
}
-void pdc_outc(unsigned char c)
-{
- pdc_iodc_outc(c);
-}
-
-void pdc_printf(const char *fmt, ...)
+int pdc_console_poll_key(struct console *co)
{
- va_list args;
- char buf[1024];
- int i, len;
+ int c;
+ unsigned long flags;
- va_start(args, fmt);
- len = vscnprintf(buf, sizeof(buf), fmt, args);
- va_end(args);
+ spin_lock_irqsave(&pdc_console_lock, flags);
+ c = pdc_iodc_getc();
+ spin_unlock_irqrestore(&pdc_console_lock, flags);
- for (i = 0; i < len; i++)
- pdc_iodc_outc(buf[i]);
-}
-
-int pdc_console_poll_key(struct console *co)
-{
- return pdc_iodc_getc();
+ return c;
}
static int pdc_console_setup(struct console *co, char *options)
}
#if defined(CONFIG_PDC_CONSOLE)
-#define PDC_CONSOLE_DEVICE pdc_console_device
+#include <linux/vt_kern.h>
+
static struct tty_driver * pdc_console_device (struct console *c, int *index)
{
extern struct tty_driver console_driver;
return &console_driver;
}
#else
-#define PDC_CONSOLE_DEVICE NULL
+#define pdc_console_device NULL
#endif
static struct console pdc_cons = {
.name = "ttyB",
.write = pdc_console_write,
- .device = PDC_CONSOLE_DEVICE,
+ .device = pdc_console_device,
.setup = pdc_console_setup,
- .flags = CON_BOOT|CON_PRINTBUFFER|CON_ENABLED,
+ .flags = CON_BOOT | CON_PRINTBUFFER | CON_ENABLED,
.index = -1,
};
static int pdc_console_initialized;
-extern unsigned long con_start; /* kernel/printk.c */
-extern unsigned long log_end; /* kernel/printk.c */
-
static void pdc_console_init_force(void)
{
}
-/* Unregister the pdc console with the printk console layer */
-void pdc_console_die(void)
-{
- if (!pdc_console_initialized)
- return;
- --pdc_console_initialized;
-
- printk(KERN_INFO "Switching from PDC console\n");
-
- /* Don't repeat what we've already printed */
- con_start = log_end;
-
- unregister_console(&pdc_cons);
-}
-
-
/*
* Used for emergencies. Currently only used if an HPMC occurs. If an
* HPMC occurs, it is possible that the current console may not be
- * properly initialed after the PDC IO reset. This routine unregisters all
- * of the current consoles, reinitializes the pdc console and
+ * properly initialised after the PDC IO reset. This routine unregisters
+ * all of the current consoles, reinitializes the pdc console and
* registers it.
*/
if (pdc_console_initialized)
return;
+ /* If we've already seen the output, don't bother to print it again */
+ if (console_drivers != NULL)
+ pdc_cons.flags &= ~CON_PRINTBUFFER;
+
while ((console = console_drivers) != NULL)
unregister_console(console_drivers);
- /* Don't repeat what we've already printed */
- con_start = log_end;
-
/* force registering the pdc console */
pdc_console_init_force();
}
-