2019-05-27 08:55:05 +02:00
|
|
|
// SPDX-License-Identifier: GPL-2.0-or-later
|
2005-04-16 15:20:36 -07:00
|
|
|
/*
|
2022-10-01 00:32:07 +02:00
|
|
|
* PDC early console support - use PDC firmware to dump text via boot console
|
2005-04-16 15:20:36 -07:00
|
|
|
*
|
2022-10-01 00:32:07 +02:00
|
|
|
* Copyright (C) 2001-2022 Helge Deller <deller@gmx.de>
|
2005-04-16 15:20:36 -07:00
|
|
|
*/
|
|
|
|
|
|
|
|
#include <linux/console.h>
|
|
|
|
#include <linux/init.h>
|
2022-10-01 00:32:07 +02:00
|
|
|
#include <linux/serial_core.h>
|
|
|
|
#include <linux/kgdb.h>
|
parisc: move definition of PAGE0 to asm/page.h
This was defined in asm/pdc.h which needs to include asm/page.h for
__PAGE_OFFSET. This leads to an include loop so that page.h eventually will
include pdc.h again. While this is no problem because of header guards, it is
a problem because some symbols may be undefined. Such an error is this:
In file included from include/linux/bitops.h:35:0,
from include/asm-generic/getorder.h:7,
from arch/parisc/include/asm/page.h:162,
from arch/parisc/include/asm/pdc.h:346,
from arch/parisc/include/asm/processor.h:16,
from arch/parisc/include/asm/spinlock.h:6,
from arch/parisc/include/asm/atomic.h:20,
from include/linux/atomic.h:4,
from include/linux/sysfs.h:20,
from include/linux/kobject.h:21,
from include/linux/device.h:17,
from include/linux/eisa.h:5,
from arch/parisc/kernel/pci.c:11:
arch/parisc/include/asm/bitops.h: In function ‘set_bit’:
arch/parisc/include/asm/bitops.h:82:2: error: implicit declaration of function ‘_atomic_spin_lock_irqsave’ [-Werror=implicit-function-declaration]
arch/parisc/include/asm/bitops.h:84:2: error: implicit declaration of function ‘_atomic_spin_unlock_irqrestore’ [-Werror=implicit-function-declaration]
Signed-off-by: Rolf Eike Beer <eike-kernel@sf-tec.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-05-10 23:08:17 +02:00
|
|
|
#include <asm/page.h> /* for PAGE0 */
|
2005-04-16 15:20:36 -07:00
|
|
|
#include <asm/pdc.h> /* for iodc_call() proto and friends */
|
|
|
|
|
|
|
|
static void pdc_console_write(struct console *co, const char *s, unsigned count)
|
|
|
|
{
|
2008-02-18 23:34:34 -08:00
|
|
|
int i = 0;
|
|
|
|
|
|
|
|
do {
|
|
|
|
i += pdc_iodc_print(s + i, count - i);
|
|
|
|
} while (i < count);
|
2005-04-16 15:20:36 -07:00
|
|
|
}
|
|
|
|
|
2022-10-01 00:32:07 +02:00
|
|
|
#ifdef CONFIG_KGDB
|
|
|
|
static int kgdb_pdc_read_char(void)
|
2005-04-16 15:20:36 -07:00
|
|
|
{
|
2022-12-17 17:45:40 +01:00
|
|
|
int c = pdc_iodc_getc();
|
2008-02-18 23:34:34 -08:00
|
|
|
|
2022-10-01 00:32:07 +02:00
|
|
|
return (c <= 0) ? NO_POLL_CHAR : c;
|
2010-06-14 19:24:41 +02:00
|
|
|
}
|
|
|
|
|
2022-10-01 00:32:07 +02:00
|
|
|
static void kgdb_pdc_write_char(u8 chr)
|
2010-06-14 19:24:41 +02:00
|
|
|
{
|
2022-12-17 17:45:40 +01:00
|
|
|
/* no need to print char as it's shown on standard console */
|
|
|
|
/* pdc_iodc_print(&chr, 1); */
|
2010-06-14 19:24:41 +02:00
|
|
|
}
|
|
|
|
|
2022-10-01 00:32:07 +02:00
|
|
|
static struct kgdb_io kgdb_pdc_io_ops = {
|
|
|
|
.name = "kgdb_pdc",
|
|
|
|
.read_char = kgdb_pdc_read_char,
|
|
|
|
.write_char = kgdb_pdc_write_char,
|
2010-06-14 19:24:41 +02:00
|
|
|
};
|
2005-04-16 15:20:36 -07:00
|
|
|
#endif
|
|
|
|
|
2022-10-01 00:32:07 +02:00
|
|
|
static int __init pdc_earlycon_setup(struct earlycon_device *device,
|
|
|
|
const char *opt)
|
2005-04-16 15:20:36 -07:00
|
|
|
{
|
2022-10-01 00:32:07 +02:00
|
|
|
struct console *earlycon_console;
|
|
|
|
|
2005-04-16 15:20:36 -07:00
|
|
|
/* If the console is duplex then copy the COUT parameters to CIN. */
|
|
|
|
if (PAGE0->mem_cons.cl_class == CL_DUPLEX)
|
|
|
|
memcpy(&PAGE0->mem_kbd, &PAGE0->mem_cons, sizeof(PAGE0->mem_cons));
|
|
|
|
|
2022-10-01 00:32:07 +02:00
|
|
|
earlycon_console = device->con;
|
|
|
|
earlycon_console->write = pdc_console_write;
|
|
|
|
device->port.iotype = UPIO_MEM32BE;
|
2005-04-16 15:20:36 -07:00
|
|
|
|
2022-10-01 00:32:07 +02:00
|
|
|
#ifdef CONFIG_KGDB
|
|
|
|
kgdb_register_io_module(&kgdb_pdc_io_ops);
|
2005-04-16 15:20:36 -07:00
|
|
|
#endif
|
|
|
|
|
2022-10-01 00:32:07 +02:00
|
|
|
return 0;
|
2005-04-16 15:20:36 -07:00
|
|
|
}
|
2022-10-01 00:32:07 +02:00
|
|
|
|
|
|
|
EARLYCON_DECLARE(pdc, pdc_earlycon_setup);
|