projects / mirror_ubuntu-artful-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 | 1 | /* |
| 1da177e4 LT |
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. | |
| 7 | * | |
| 8 | * Adapted from ppc4xx_kgdb.c. | |
| 9 | * | |
| 10 | * Author: Matt Porter <mporter@kernel.crashing.org> | |
| 11 | * | |
| 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 | |
| 15 | * or implied. | |
| 16 | */ | |
| 17 | ||
| 1da177e4 LT |
18 | #include <linux/types.h> |
| 19 | #include <linux/kernel.h> | |
| 20 | ||
| 21 | #include <asm/machdep.h> | |
| 22 | ||
| 23 | extern unsigned long serial_init(int, void *); | |
| 24 | extern unsigned long serial_getc(unsigned long); | |
| 25 | extern unsigned long serial_putc(unsigned long, unsigned char); | |
| 26 | ||
| 27 | #if defined(CONFIG_KGDB_TTYS0) | |
| 28 | #define KGDB_PORT 0 | |
| 29 | #elif defined(CONFIG_KGDB_TTYS1) | |
| 30 | #define KGDB_PORT 1 | |
| 31 | #elif defined(CONFIG_KGDB_TTYS2) | |
| 32 | #define KGDB_PORT 2 | |
| 33 | #elif defined(CONFIG_KGDB_TTYS3) | |
| 34 | #define KGDB_PORT 3 | |
| 35 | #else | |
| 36 | #error "invalid kgdb_tty port" | |
| 37 | #endif | |
| 38 | ||
| 39 | static volatile unsigned int kgdb_debugport; | |
| 40 | ||
| 41 | void putDebugChar(unsigned char c) | |
| 42 | { | |
| 43 | if (kgdb_debugport == 0) | |
| 44 | kgdb_debugport = serial_init(KGDB_PORT, NULL); | |
| 45 | ||
| 46 | serial_putc(kgdb_debugport, c); | |
| 47 | } | |
| 48 | ||
| 49 | int getDebugChar(void) | |
| 50 | { | |
| 51 | if (kgdb_debugport == 0) | |
| 52 | kgdb_debugport = serial_init(KGDB_PORT, NULL); | |
| 53 | ||
| 54 | return(serial_getc(kgdb_debugport)); | |
| 55 | } | |
| 56 | ||
| 57 | void kgdb_interruptible(int enable) | |
| 58 | { | |
| 59 | return; | |
| 60 | } | |
| 61 | ||
| 62 | void putDebugString(char* str) | |
| 63 | { | |
| 64 | while (*str != '\0') { | |
| 65 | putDebugChar(*str); | |
| 66 | str++; | |
| 67 | } | |
| 68 | putDebugChar('\r'); | |
| 69 | return; | |
| 70 | } | |
| 71 | ||
| 72 | /* | |
| 73 | * Note: gen550_init() must be called already on the port we are going | |
| 74 | * to use. | |
| 75 | */ | |
| 76 | void | |
| 77 | gen550_kgdb_map_scc(void) | |
| 78 | { | |
| 79 | printk(KERN_DEBUG "kgdb init\n"); | |
| 80 | if (ppc_md.early_serial_map) | |
| 81 | ppc_md.early_serial_map(); | |
| 82 | kgdb_debugport = serial_init(KGDB_PORT, NULL); | |
| 83 | } |