/* * Generic 16550 kgdb support intended to be useful on a variety * of platforms. To enable this support, it is necessary to set * the CONFIG_GEN550 option. Any virtual mapping of the serial * port(s) to be used can be accomplished by setting * ppc_md.early_serial_map to a platform-specific mapping function. * * Adapted from ppc4xx_kgdb.c. * * Author: Matt Porter <mporter@kernel.crashing.org> * * 2002-2004 (c) MontaVista Software, Inc. This file is licensed under * the terms of the GNU General Public License version 2. This program * is licensed "as is" without any warranty of any kind, whether express * or implied. */ #include <linux/config.h> #include <linux/types.h> #include <linux/kernel.h> #include <asm/machdep.h> extern unsigned long serial_init(int, void *); extern unsigned long serial_getc(unsigned long); extern unsigned long serial_putc(unsigned long, unsigned char); #if defined(CONFIG_KGDB_TTYS0) #define KGDB_PORT 0 #elif defined(CONFIG_KGDB_TTYS1) #define KGDB_PORT 1 #elif defined(CONFIG_KGDB_TTYS2) #define KGDB_PORT 2 #elif defined(CONFIG_KGDB_TTYS3) #define KGDB_PORT 3 #else #error "invalid kgdb_tty port" #endif static volatile unsigned int kgdb_debugport; void putDebugChar(unsigned char c) { if (kgdb_debugport == 0) kgdb_debugport = serial_init(KGDB_PORT, NULL); serial_putc(kgdb_debugport, c); } int getDebugChar(void) { if (kgdb_debugport == 0) kgdb_debugport = serial_init(KGDB_PORT, NULL); return(serial_getc(kgdb_debugport)); } void kgdb_interruptible(int enable) { return; } void putDebugString(char* str) { while (*str != '\0') { putDebugChar(*str); str++; } putDebugChar('\r'); return; } /* * Note: gen550_init() must be called already on the port we are going * to use. */ void gen550_kgdb_map_scc(void) { printk(KERN_DEBUG "kgdb init\n"); if (ppc_md.early_serial_map) ppc_md.early_serial_map(); kgdb_debugport = serial_init(KGDB_PORT, NULL); }