2 * Generic 16550 kgdb support intended to be useful on a variety
3 * of platforms. To enable this support, it is necessary to set
4 * the CONFIG_GEN550 option. Any virtual mapping of the serial
5 * port(s) to be used can be accomplished by setting
6 * ppc_md.early_serial_map to a platform-specific mapping function.
8 * Adapted from ppc4xx_kgdb.c.
10 * Author: Matt Porter <mporter@kernel.crashing.org>
12 * 2002-2004 (c) MontaVista Software, Inc. This file is licensed under
13 * the terms of the GNU General Public License version 2. This program
14 * is licensed "as is" without any warranty of any kind, whether express
18 #include <linux/config.h>
19 #include <linux/types.h>
20 #include <linux/kernel.h>
22 #include <asm/machdep.h>
24 extern unsigned long serial_init(int, void *);
25 extern unsigned long serial_getc(unsigned long);
26 extern unsigned long serial_putc(unsigned long, unsigned char);
28 #if defined(CONFIG_KGDB_TTYS0)
30 #elif defined(CONFIG_KGDB_TTYS1)
32 #elif defined(CONFIG_KGDB_TTYS2)
34 #elif defined(CONFIG_KGDB_TTYS3)
37 #error "invalid kgdb_tty port"
40 static volatile unsigned int kgdb_debugport;
42 void putDebugChar(unsigned char c)
44 if (kgdb_debugport == 0)
45 kgdb_debugport = serial_init(KGDB_PORT, NULL);
47 serial_putc(kgdb_debugport, c);
50 int getDebugChar(void)
52 if (kgdb_debugport == 0)
53 kgdb_debugport = serial_init(KGDB_PORT, NULL);
55 return(serial_getc(kgdb_debugport));
58 void kgdb_interruptible(int enable)
63 void putDebugString(char* str)
65 while (*str != '\0') {
74 * Note: gen550_init() must be called already on the port we are going
78 gen550_kgdb_map_scc(void)
80 printk(KERN_DEBUG "kgdb init\n");
81 if (ppc_md.early_serial_map)
82 ppc_md.early_serial_map();
83 kgdb_debugport = serial_init(KGDB_PORT, NULL);