summaryrefslogtreecommitdiffstats
path: root/arch/blackfin/Kconfig
diff options
context:
space:
mode:
authorJie Zhang <jie.zhang@analog.com>2009-06-16 09:48:33 +0000
committerMike Frysinger <vapier@gentoo.org>2009-06-22 21:15:59 -0400
commit41ba653f24a39a0e6a4afe9b2763a95a57e042c2 (patch)
tree43eb086046d4eef764878e04512ddd215ca8845b /arch/blackfin/Kconfig
parent7c039a90f02c3fdcab8d3ca170c05ad37014189e (diff)
downloadop-kernel-dev-41ba653f24a39a0e6a4afe9b2763a95a57e042c2.zip
op-kernel-dev-41ba653f24a39a0e6a4afe9b2763a95a57e042c2.tar.gz
Blackfin: decouple unrelated cache settings to get exact behavior
The current cache options don't really represent the hardware features. They end up setting different aspects of the hardware so that the end result is to turn on/off the cache. Unfortunately, when we hit cache problems with the hardware, it's difficult to test different settings to root cause the problem. The current settings also don't cleanly allow for different caching behaviors with different regions of memory. So split the configure options such that they properly reflect the settings that are applied to the hardware. Signed-off-by: Jie Zhang <jie.zhang@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Diffstat (limited to 'arch/blackfin/Kconfig')
-rw-r--r--arch/blackfin/Kconfig57
1 files changed, 39 insertions, 18 deletions
diff --git a/arch/blackfin/Kconfig b/arch/blackfin/Kconfig
index 8140a2f..220635a 100644
--- a/arch/blackfin/Kconfig
+++ b/arch/blackfin/Kconfig
@@ -907,23 +907,41 @@ endchoice
comment "Cache Support"
+
config BFIN_ICACHE
bool "Enable ICACHE"
+ default y
+config BFIN_ICACHE_LOCK
+ bool "Enable Instruction Cache Locking"
+ depends on BFIN_ICACHE
+ default n
+config BFIN_EXTMEM_ICACHEABLE
+ bool "Enable ICACHE for external memory"
+ depends on BFIN_ICACHE
+ default y
+config BFIN_L2_ICACHEABLE
+ bool "Enable ICACHE for L2 SRAM"
+ depends on BFIN_ICACHE
+ depends on BF54x || BF561
+ default n
+
config BFIN_DCACHE
bool "Enable DCACHE"
+ default y
config BFIN_DCACHE_BANKA
bool "Enable only 16k BankA DCACHE - BankB is SRAM"
depends on BFIN_DCACHE && !BF531
default n
-config BFIN_ICACHE_LOCK
- bool "Enable Instruction Cache Locking"
-
-choice
- prompt "External memory cache policy"
+config BFIN_EXTMEM_DCACHEABLE
+ bool "Enable DCACHE for external memory"
depends on BFIN_DCACHE
- default BFIN_WB if !SMP
- default BFIN_WT if SMP
-config BFIN_WB
+ default y
+choice
+ prompt "External memory DCACHE policy"
+ depends on BFIN_EXTMEM_DCACHEABLE
+ default BFIN_EXTMEM_WRITEBACK if !SMP
+ default BFIN_EXTMEM_WRITETHROUGH if SMP
+config BFIN_EXTMEM_WRITEBACK
bool "Write back"
depends on !SMP
help
@@ -941,7 +959,7 @@ config BFIN_WB
If you are unsure of the options and you want to be safe,
then go with Write Through.
-config BFIN_WT
+config BFIN_EXTMEM_WRITETHROUGH
bool "Write through"
help
Write Back Policy:
@@ -960,23 +978,26 @@ config BFIN_WT
endchoice
+config BFIN_L2_DCACHEABLE
+ bool "Enable DCACHE for L2 SRAM"
+ depends on BFIN_DCACHE
+ depends on BF54x || BF561
+ default n
choice
- prompt "L2 SRAM cache policy"
- depends on (BF54x || BF561)
- default BFIN_L2_WT
-config BFIN_L2_WB
+ prompt "L2 SRAM DCACHE policy"
+ depends on BFIN_L2_DCACHEABLE
+ default BFIN_L2_WRITEBACK
+config BFIN_L2_WRITEBACK
bool "Write back"
depends on !SMP
-config BFIN_L2_WT
+config BFIN_L2_WRITETHROUGH
bool "Write through"
depends on !SMP
-
-config BFIN_L2_NOT_CACHED
- bool "Not cached"
-
endchoice
+
+comment "Memory Protection Unit"
config MPU
bool "Enable the memory protection unit (EXPERIMENTAL)"
default n
OpenPOWER on IntegriCloud