include/asm-v850/v850e_timer_d.h

   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.  */
  57 extern void v850e_timer_d_configure (unsigned timer, unsigned rate);
  58
  59 #endif /* !__ASSEMBLY__ */
  60
  61
  62 #endif /* __V850_V850E_TIMER_D_H__  */