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/*
* (C) Copyright 2010
* Texas Instruments, <www.ti.com>
*
* Aneesh V <aneesh@ti.com>
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#ifndef _UTILS_H_
#define _UTILS_H_
/* extract a bit field from a bit vector */
#define get_bit_field(nr, start, mask)\
(((nr) & (mask)) >> (start))
/* Set a field in a bit vector */
#define set_bit_field(nr, start, mask, val)\
do { \
(nr) = ((nr) & ~(mask)) | (((val) << (start)) & (mask));\
} while (0);
/*
* Utility macro for read-modify-write of a hardware register
* addr - address of the register
* shift - starting bit position of the field to be modified
* msk - mask for the field
* val - value to be shifted masked and written to the field
*/
#define modify_reg_32(addr, shift, msk, val) \
do {\
writel(((readl(addr) & ~(msk))|(((val) << (shift)) & (msk))),\
(addr));\
} while (0);
static inline s32 log_2_n_round_up(u32 n)
{
s32 log2n = -1;
u32 temp = n;
while (temp) {
log2n++;
temp >>= 1;
}
if (n & (n - 1))
return log2n + 1; /* not power of 2 - round up */
else
return log2n; /* power of 2 */
}
static inline s32 log_2_n_round_down(u32 n)
{
s32 log2n = -1;
u32 temp = n;
while (temp) {
log2n++;
temp >>= 1;
}
return log2n;
}
#endif /* _OMAP_COMMON_H_ */
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