diff options
Diffstat (limited to 'kernel/sys/i8253.h')
| -rw-r--r-- | kernel/sys/i8253.h | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/kernel/sys/i8253.h b/kernel/sys/i8253.h new file mode 100644 index 0000000..7096593 --- /dev/null +++ b/kernel/sys/i8253.h @@ -0,0 +1,48 @@ +/* Copyright (c) 1995 Vixie Enterprises + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies, and that + * the name of Vixie Enterprises not be used in advertising or publicity + * pertaining to distribution of the document or software without specific, + * written prior permission. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND VIXIE ENTERPRISES DISCLAIMS ALL + * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL VIXIE ENTERPRISES + * BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES + * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, + * WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, + * ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS + * SOFTWARE. + */ + +#ifndef _I8253_DEFINED +#define _I8253_DEFINED + +typedef union { + unsigned char i; + struct { + unsigned int bcd : 1; +#define i8253_binary 0 +#define i8253_bcd 1 + unsigned int mode : 3; +#define i8253_termcnt 0 +#define i8253_oneshot 1 +#define i8253_rategen 2 +#define i8253_sqrwave 3 +#define i8253_softstb 4 +#define i8253_hardstb 5 + unsigned int rl : 2; +#define i8253_latch 0 +#define i8253_lsb 1 +#define i8253_msb 2 +#define i8253_lmb 3 + unsigned int cntr : 2; +#define i8253_cntr_0 0 +#define i8253_cntr_1 1 +#define i8253_cntr_2 2 + } s; +} i8253_ctrl; + +#endif /*_I8253_DEFINED*/ |