| /* |
| * (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_ |
| |
| 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 |
