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armv7: cache maintenance operations for armv7

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- Add a framework for layered cache maintenance
	- separate out SOC specific outer cache maintenance from
	  maintenance of caches known to CPU

- Add generic ARMv7 cache maintenance operations that affect all
  caches known to ARMv7 CPUs. For instance in Cortex-A8 these
  opertions will affect both L1 and L2 caches. In Cortex-A9
  these will affect only L1 cache

- D-cache operations supported:
	- Invalidate entire D-cache
	- Invalidate D-cache range
	- Flush(clean & invalidate) entire D-cache
	- Flush D-cache range
- I-cache operations supported:
	- Invalidate entire I-cache

- Add maintenance functions for TLB, branch predictor array etc.

- Enable -march=armv7-a so that armv7 assembly instructions can be
  used

Signed-off-by: Aneesh V <aneesh@ti.com>
This commit is contained in:
Aneesh V 2011-06-16 23:30:47 +00:00 • committed by Albert ARIBAUD
parent 4c93da7c39
commit 2c451f7831
6 changed files with 527 additions and 2 deletions
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56
arch/arm/include/asm/utils.h Normal file
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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_
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