/contrib/ntp/kernel/sys/pcl720.h

 1/* Copyright (c) 1995 Vixie Enterprises
 2 *
 3 * Permission to use, copy, modify, and distribute this software for any
 4 * purpose with or without fee is hereby granted, provided that the above
 5 * copyright notice and this permission notice appear in all copies, and that
 6 * the name of Vixie Enterprises not be used in advertising or publicity
 7 * pertaining to distribution of the document or software without specific,
 8 * written prior permission.
 9 * 
10 * THE SOFTWARE IS PROVIDED "AS IS" AND VIXIE ENTERPRISES DISCLAIMS ALL
11 * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
12 * OF MERCHANTABILITY AND FITNESS.   IN NO EVENT SHALL VIXIE ENTERPRISES
13 * BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES
14 * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
15 * WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
16 * ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
17 * SOFTWARE.
18 */
19
20#ifndef _PCL720_DEFINED
21#define _PCL720_DEFINED
22
23#define	pcl720_data(base,bit)	(base+(bit>>3))
24#define pcl720_data_0_7(base)	(base+0)
25#define pcl720_data_8_15(base)	(base+1)
26#define pcl720_data_16_23(base)	(base+2)
27#define pcl720_data_24_31(base)	(base+3)
28#define pcl720_cntr(base,cntr)	(base+4+cntr)	/* cntr: 0..2 */
29#define pcl720_cntr_0(base)	(base+4)
30#define pcl720_cntr_1(base)	(base+5)
31#define pcl720_cntr_2(base)	(base+6)
32#define pcl720_ctrl(base)	(base+7)
33
34#ifndef DEBUG_PCL720
35#define	pcl720_inb(x)		inb(x)
36#define	pcl720_outb(x,y)	outb(x,y)
37#else
38static unsigned char pcl720_inb(int addr) {
39	unsigned char x = inb(addr);
40	fprintf(DEBUG_PCL720, "inb(0x%x) -> 0x%x\n", addr, x);
41	return (x);
42}
43static void pcl720_outb(int addr, unsigned char x) {
44	outb(addr, x);
45	fprintf(DEBUG_PCL720, "outb(0x%x, 0x%x)\n", addr, x);
46}
47#endif
48
49#define	pcl720_load(Base,Cntr,Mode,Val) \
50	({	register unsigned int	b = Base, c = Cntr, v = Val; \
51		i8253_ctrl ctrl; \
52		\
53		ctrl.s.bcd = i8253_binary; \
54		ctrl.s.mode = Mode; \
55		ctrl.s.rl = i8253_lmb; \
56		ctrl.s.cntr = c; \
57		pcl720_outb(pcl720_ctrl(b), ctrl.i); \
58		pcl720_outb(pcl720_cntr(b,c), v); \
59		pcl720_outb(pcl720_cntr(b,c), v >> 8); \
60		v; \
61	})
62
63#define	pcl720_read(Base,Cntr) \
64	({	register unsigned int	b = Base, v; \
65		i8253_ctrl ctrl; \
66		\
67		ctrl.s.rl = i8253_latch; \
68		ctrl.s.cntr = i8253_cntr_0; \
69		pcl720_outb(pcl720_ctrl(b), ctrl.i); \
70		v = pcl720_inb(pcl720_cntr_0(b)); \
71		v |= (pcl720_inb(pcl720_cntr_0(b)) << 8); \
72		v; \
73	})
74
75#define	pcl720_input(Base) \
76	({	register unsigned int	b = Base, v; \
77		\
78		v = pcl720_inb(pcl720_data_0_7(b)); \
79		v |= (pcl720_inb(pcl720_data_8_15(b)) << 8); \
80		v |= (pcl720_inb(pcl720_data_16_23(b)) << 16); \
81		v |= (pcl720_inb(pcl720_data_24_31(b)) << 24); \
82		v; \
83	})
84
85#define	pcl720_output(Base,Value) \
86	({	register unsigned int	b = Base, v = Value; \
87		\
88		pcl720_outb(pcl720_data_0_7(b), v); \
89		pcl720_outb(pcl720_data_8_15(b), v << 8); \
90		pcl720_outb(pcl720_data_16_23(b), v << 16); \
91		pcl720_outb(pcl720_data_24_31(b), v << 24); \
92		v; \
93	})
94
95#endif /*_PCL720_DEFINED*/