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authorAneesh V <aneesh@ti.com>2011-08-11 04:35:45 +0000
committerAlbert ARIBAUD <albert.u.boot@aribaud.net>2011-09-04 11:36:16 +0200
commitcabe2878a8201441a8aa4c482acb568f9ca137f0 (patch)
treeb18d2af9ba2fdd04498554fb6db12a7d9b4a2de4 /arch/arm
parent882f80b993f3719cce5bfa7f1bca9b1b23062b5f (diff)
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armv7: cache: remove flush on un-aligned invalidate
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>
Diffstat (limited to 'arch/arm')
-rw-r--r--arch/arm/cpu/armv7/cache_v7.c14
-rw-r--r--arch/arm/lib/cache-pl310.c15
2 files changed, 17 insertions, 12 deletions
diff --git a/arch/arm/cpu/armv7/cache_v7.c b/arch/arm/cpu/armv7/cache_v7.c
index 665f025..1b4e808 100644
--- a/arch/arm/cpu/armv7/cache_v7.c
+++ b/arch/arm/cpu/armv7/cache_v7.c
@@ -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);
}
diff --git a/arch/arm/lib/cache-pl310.c b/arch/arm/lib/cache-pl310.c
index 36c629c..21d13f7 100644
--- a/arch/arm/lib/cache-pl310.c
+++ b/arch/arm/lib/cache-pl310.c
@@ -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);
}