Commit c1c72d9b authored by Helge Deller's avatar Helge Deller
Browse files

parisc: Add kgdb io_module to read chars via PDC 



Add a simplistic keyboard driver for usage of PDC I/O functions
with kgdb. This driver makes it possible to use KGDB with QEMU.

Signed-off-by: default avatarHelge Deller <deller@gmx.de>
parent 712a270d

arch/parisc/kernel/kgdb.c

+21 −0
Original line number Diff line number Diff line
@@ -3,6 +3,7 @@ 
 * PA-RISC KGDB support

 *

 * Copyright (c) 2019 Sven Schnelle <svens@stackframe.org>

 * Copyright (c) 2022 Helge Deller <deller@gmx.de>

 *

 */
@@ -207,3 +208,23 @@ int kgdb_arch_handle_exception(int trap, int signo, 
	}

	return -1;

}



/* KGDB console driver which uses PDC to read chars from keyboard */



static void kgdb_pdc_write_char(u8 chr)

{

	/* no need to print char. kgdb will do it. */

}



static struct kgdb_io kgdb_pdc_io_ops = {

	.name		= "kgdb_pdc",

	.read_char	= pdc_iodc_getc,

	.write_char	= kgdb_pdc_write_char,

};



static int __init kgdb_pdc_init(void)

{

	kgdb_register_io_module(&kgdb_pdc_io_ops);

	return 0;

}

early_initcall(kgdb_pdc_init);