diff options
| author | Stefan Reinauer <stefan.reinauer@coreboot.org> | 2012-12-07 17:15:04 -0800 |
|---|---|---|
| committer | Ronald G. Minnich <rminnich@gmail.com> | 2012-12-08 06:53:19 +0100 |
| commit | 52db0b984523047da19ca3b41558b9dbf45abad7 (patch) | |
| tree | 5ed389bb233d5b007593ede56040ccf268e37bbe /src/arch/armv7/include/utils.h | |
| parent | 509f77277cfccdae897f0d369672ce0818ecdf88 (diff) | |
| download | coreboot-52db0b984523047da19ca3b41558b9dbf45abad7.tar.xz | |
WIP: Initial ARMv7 architecture implementation in coreboot
The first ARMv7 CPU we're going to support is the Exynos 5250
used in the Google Snow ChromeBook.
Change-Id: I4de8433bbc6202eb8fef2556a11186a3376d411b
Signed-off-by: David Hendricks <dhendrix@chromium.org>
Signed-off-by: Stefan Reinauer <reinauer@google.com>
Signed-off-by: Ronald G. Minnich <rminnich@gmail.com>
Reviewed-on: http://review.coreboot.org/2004
Tested-by: build bot (Jenkins)
Diffstat (limited to 'src/arch/armv7/include/utils.h')
| -rw-r--r-- | src/arch/armv7/include/utils.h | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/src/arch/armv7/include/utils.h b/src/arch/armv7/include/utils.h new file mode 100644 index 0000000000..828b86cb36 --- /dev/null +++ b/src/arch/armv7/include/utils.h @@ -0,0 +1,56 @@ +/* + * (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 |