diff options
Diffstat (limited to 'device/cons.h')
| -rw-r--r-- | device/cons.h | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/device/cons.h b/device/cons.h index 6a0ae850..34f3bc56 100644 --- a/device/cons.h +++ b/device/cons.h @@ -41,9 +41,6 @@ struct consdev { #define CN_INTERNAL 2 /* "internal" bit-mapped display */ #define CN_REMOTE 3 /* serial interface with remote bit set */ -/* XXX */ -#define CONSMAJOR 0 - #define CONSBUFSIZE 1024 #ifdef KERNEL @@ -57,4 +54,15 @@ extern int cngetc(void); extern int cnmaygetc(void); extern void cnputc(char); + +/* + * ROM getc/putc primitives. + * On some architectures, the boot ROM provides basic character input/output + * routines that can be used before devices are configured or virtual memory + * is enabled. This can be useful to debug (or catch panics from) code early + * in the bootstrap procedure. + */ +extern int (*romgetc)(char c); +extern void (*romputc)(char c); + #endif /* _DEVICE_CONS_H */ |