1/*
2 * include/asm-v850/v850e_timer_d.h -- `Timer D' component often used
3 *	with the V850E cpu core
4 *
5 *  Copyright (C) 2001,02,03  NEC Electronics Corporation
6 *  Copyright (C) 2001,02,03  Miles Bader <miles@gnu.org>
7 *
8 * This file is subject to the terms and conditions of the GNU General
9 * Public License.  See the file COPYING in the main directory of this
10 * archive for more details.
11 *
12 * Written by Miles Bader <miles@gnu.org>
13 */
14
15#ifndef __V850_V850E_TIMER_D_H__
16#define __V850_V850E_TIMER_D_H__
17
18#include <asm/types.h>
19#include <asm/machdep.h>	/* Pick up chip-specific defs.  */
20
21
22/* Timer D (16-bit interval timers).  */
23
24/* Count registers for timer D.  */
25#define V850E_TIMER_D_TMD_ADDR(n) (V850E_TIMER_D_TMD_BASE_ADDR + 0x10 * (n))
26#define V850E_TIMER_D_TMD(n)	  (*(volatile u16 *)V850E_TIMER_D_TMD_ADDR(n))
27
28/* Count compare registers for timer D.  */
29#define V850E_TIMER_D_CMD_ADDR(n) (V850E_TIMER_D_CMD_BASE_ADDR + 0x10 * (n))
30#define V850E_TIMER_D_CMD(n)	  (*(volatile u16 *)V850E_TIMER_D_CMD_ADDR(n))
31
32/* Control registers for timer D.  */
33#define V850E_TIMER_D_TMCD_ADDR(n) (V850E_TIMER_D_TMCD_BASE_ADDR + 0x10 * (n))
34#define V850E_TIMER_D_TMCD(n)	   (*(volatile u8 *)V850E_TIMER_D_TMCD_ADDR(n))
35/* Control bits for timer D.  */
36#define V850E_TIMER_D_TMCD_CE  	   0x2 /* count enable */
37#define V850E_TIMER_D_TMCD_CAE	   0x1 /* clock action enable */
38/* Clock divider setting (log2).  */
39#define V850E_TIMER_D_TMCD_CS(divlog2) (((divlog2) - V850E_TIMER_D_TMCD_CS_MIN) << 4)
40/* Minimum clock divider setting (log2).  */
41#ifndef V850E_TIMER_D_TMCD_CS_MIN     /* Can be overridden by mach-specific hdrs */
42#define V850E_TIMER_D_TMCD_CS_MIN  2 /* Default is correct for the v850e/ma1 */
43#endif
44/* Maximum clock divider setting (log2).  */
45#define V850E_TIMER_D_TMCD_CS_MAX  (V850E_TIMER_D_TMCD_CS_MIN + 7)
46
47/* Return the clock-divider (log2) of timer D unit N.  */
48#define V850E_TIMER_D_DIVLOG2(n) \
49  (((V850E_TIMER_D_TMCD(n) >> 4) & 0x7) + V850E_TIMER_D_TMCD_CS_MIN)
50
51
52#ifndef __ASSEMBLY__
53
54/* Start interval timer TIMER (0-3).  The timer will issue the
55   corresponding INTCMD interrupt RATE times per second.  This function
56   does not enable the interrupt.  */
57extern void v850e_timer_d_configure (unsigned timer, unsigned rate);
58
59#endif /* !__ASSEMBLY__ */
60
61
62#endif /* __V850_V850E_TIMER_D_H__  */
63