Add a Kconfig entry for MMU and imply for all platforms
using cache-cp15.c. Using imply instead of select so that
MMU can be disabled by defconfigs when not needed.
Signed-off-by: Lokesh Vutla <lokeshvu...@ti.com>
---
arch/arm/Kconfig | 15 +++++++++++++++
arch/arm/lib/Makefile | 6 +-----
2 files changed, 16 insertions(+), 5 deletions(-)
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index de36ab6701..fe5bff097d 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -74,6 +74,12 @@ config ARM_ASM_UNIFIED
config THUMB2_KERNEL
bool
+config MMU
+ bool "MMU-based Paged Memory Management Support"
+ help
+ Select if you want MMU-based virtualised addressing space
+ support by paged memory management.
+
# If set, the workarounds for these ARM errata are applied early during U-Boot
# startup. Note that in general these options force the workarounds to be
# applied; no CPU-type/version detection exists, unlike the similar options in
@@ -158,33 +164,40 @@ config ARM_ERRATA_855873
config CPU_ARM720T
bool
select SYS_CACHE_SHIFT_5
+ imply MMU
config CPU_ARM920T
bool
select SYS_CACHE_SHIFT_5
+ imply MMU
config CPU_ARM926EJS
bool
select SYS_CACHE_SHIFT_5
+ imply MMU
config CPU_ARM946ES
bool
select SYS_CACHE_SHIFT_5
+ imply MMU
config CPU_ARM1136
bool
select SYS_CACHE_SHIFT_5
+ imply MMU
config CPU_ARM1176
bool
select HAS_VBAR
select SYS_CACHE_SHIFT_5
+ imply MMU
config CPU_V7
bool
select HAS_VBAR
select HAS_THUMB2
select SYS_CACHE_SHIFT_6
+ imply MMU
config CPU_V7M
bool
@@ -200,10 +213,12 @@ config CPU_V7R
config CPU_PXA
bool
select SYS_CACHE_SHIFT_5
+ imply MMU
config CPU_SA1100
bool
select SYS_CACHE_SHIFT_5
+ imply MMU
config SYS_CPU
default "arm720t" if CPU_ARM720T
diff --git a/arch/arm/lib/Makefile b/arch/arm/lib/Makefile
index 3d3085e917..f907adc161 100644
--- a/arch/arm/lib/Makefile
+++ b/arch/arm/lib/Makefile
@@ -63,11 +63,7 @@ obj-y += reset.o
endif
obj-y += cache.o
-ifndef CONFIG_ARM64
-ifndef CONFIG_CPU_V7M
-obj-y += cache-cp15.o
-endif
-endif
+obj-$(CONFIG_MMU) += cache-cp15.o
obj-y += psci-dt.o
--
2.17.0
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