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authorMike Frysinger <vapier@gentoo.org>2010-05-27 22:46:46 (GMT)
committerMike Frysinger <vapier@gentoo.org>2010-08-06 16:55:47 (GMT)
commit74181295fbc6e65047e85529aa74457d82355ffc (patch)
treebf218b8d35999e531643d060ac1a8987b71e2259 /arch/blackfin/Kconfig
parentdc7101bbaed644e61aa0056ff572b8d7a58e1ef0 (diff)
downloadlinux-74181295fbc6e65047e85529aa74457d82355ffc.tar.xz
Blackfin: allow cache funcs to be in L1 for IFLUSH Anomaly 05000491
Anomaly 05000491 says that IFLUSH cannot have certain types of memory stalls triggered before it has completed in order to function correctly. One such condition is that it be in L1 instruction. So add a config option to move it there, default it to on, and throw up a warning when it is turned off and this anomaly exists. Since the anomaly should be worked around, we can drop the older method of calling IFLUSH multiple times. Signed-off-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Diffstat (limited to 'arch/blackfin/Kconfig')
-rw-r--r--arch/blackfin/Kconfig12
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/blackfin/Kconfig b/arch/blackfin/Kconfig
index f66294b..de4bd43 100644
--- a/arch/blackfin/Kconfig
+++ b/arch/blackfin/Kconfig
@@ -853,6 +853,18 @@ config CPLB_SWITCH_TAB_L1
If enabled, the CPLB Switch Tables are linked
into L1 data memory. (less latency)
+config CACHE_FLUSH_L1
+ bool "Locate cache flush funcs in L1 Inst Memory"
+ default y
+ help
+ If enabled, the Blackfin cache flushing functions are linked
+ into L1 instruction memory.
+
+ Note that this might be required to address anomalies, but
+ these functions are pretty small, so it shouldn't be too bad.
+ If you are using a processor affected by an anomaly, the build
+ system will double check for you and prevent it.
+
config APP_STACK_L1
bool "Support locating application stack in L1 Scratch Memory"
default y