1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
35 lines
1.4 KiB
C
35 lines
1.4 KiB
C
/*
|
|
* include/asm-v850/v850e_utils.h -- Utility functions associated with
|
|
* V850E CPUs
|
|
*
|
|
* Copyright (C) 2001,03 NEC Electronics Corporation
|
|
* Copyright (C) 2001,03 Miles Bader <miles@gnu.org>
|
|
*
|
|
* This file is subject to the terms and conditions of the GNU General
|
|
* Public License. See the file COPYING in the main directory of this
|
|
* archive for more details.
|
|
*
|
|
* Written by Miles Bader <miles@gnu.org>
|
|
*/
|
|
|
|
#ifndef __V850_V850E_UTILS_H__
|
|
#define __V850_V850E_UTILS_H__
|
|
|
|
/* Calculate counter clock-divider and count values to attain the
|
|
desired frequency RATE from the base frequency BASE_FREQ. The
|
|
counter is expected to have a clock-divider, which can divide the
|
|
system cpu clock by a power of two value from MIN_DIVLOG2 to
|
|
MAX_DIV_LOG2, and a word-size of COUNTER_SIZE bits (the counter
|
|
counts up and resets whenever it's equal to the compare register,
|
|
generating an interrupt or whatever when it does so). The returned
|
|
values are: *DIVLOG2 -- log2 of the desired clock divider and *COUNT
|
|
-- the counter compare value to use. Returns true if it was possible
|
|
to find a reasonable value, otherwise false (and the other return
|
|
values will be set to be as good as possible). */
|
|
extern int calc_counter_params (unsigned long base_freq,
|
|
unsigned long rate,
|
|
unsigned min_divlog2, unsigned max_divlog2,
|
|
unsigned counter_size,
|
|
unsigned *divlog2, unsigned *count);
|
|
|
|
#endif /* __V850_V850E_UTILS_H__ */
|