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armv7: cache: remove flush on un-aligned invalidate

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Remove the flush of boundary cache-lines done as part
of invalidate on a non cache-line boundary aligned
buffer

Also, print a warning when this situation is recognized.

Signed-off-by: Aneesh V <aneesh@ti.com>
This commit is contained in:
Aneesh V 2011-08-11 04:35:45 +00:00 committed by Albert ARIBAUD
parent 882f80b993
commit cabe2878a8
2 changed files with 17 additions and 12 deletions
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14
arch/arm/cpu/armv7/cache_v7.c
View File

@ -181,21 +181,23 @@ static void v7_dcache_inval_range(u32 start, u32 stop, u32 line_len)
u32 mva;
/*
* If start address is not aligned to cache-line flush the first
* line to prevent affecting somebody else's buffer
* If start address is not aligned to cache-line do not
* invalidate the first cache-line
*/
if (start & (line_len - 1)) {
v7_dcache_clean_inval_range(start, start + 1, line_len);
printf("ERROR: %s - start address is not aligned - 0x%08x\n",
__func__, start);
/* move to next cache line */
start = (start + line_len - 1) & ~(line_len - 1);
}
/*
* If stop address is not aligned to cache-line flush the last
* line to prevent affecting somebody else's buffer
* If stop address is not aligned to cache-line do not
* invalidate the last cache-line
*/
if (stop & (line_len - 1)) {
v7_dcache_clean_inval_range(stop, stop + 1, line_len);
printf("ERROR: %s - stop address is not aligned - 0x%08x\n",
__func__, stop);
/* align to the beginning of this cache line */
stop &= ~(line_len - 1);
}

15
arch/arm/lib/cache-pl310.c
View File

@ -26,6 +26,7 @@
#include <asm/armv7.h>
#include <asm/pl310.h>
#include <config.h>
#include <common.h>
struct pl310_regs *const pl310 = (struct pl310_regs *)CONFIG_SYS_PL310_BASE;
@ -89,21 +90,23 @@ void v7_outer_cache_inval_range(u32 start, u32 stop)
u32 pa, line_size = 32;
/*
* If start address is not aligned to cache-line flush the first
* line to prevent affecting somebody else's buffer
* If start address is not aligned to cache-line do not
* invalidate the first cache-line
*/
if (start & (line_size - 1)) {
v7_outer_cache_flush_range(start, start + 1);
printf("ERROR: %s - start address is not aligned - 0x%08x\n",
__func__, start);
/* move to next cache line */
start = (start + line_size - 1) & ~(line_size - 1);
}
/*
* If stop address is not aligned to cache-line flush the last
* line to prevent affecting somebody else's buffer
* If stop address is not aligned to cache-line do not
* invalidate the last cache-line
*/
if (stop & (line_size - 1)) {
v7_outer_cache_flush_range(stop, stop + 1);
printf("ERROR: %s - stop address is not aligned - 0x%08x\n",
__func__, stop);
/* align to the beginning of this cache line */
stop &= ~(line_size - 1);
}