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authorVladimir Murzin <vladimir.murzin@arm.com>2017-10-16 15:00:45 +0300
committerRussell King <rmk+kernel@armlinux.org.uk>2017-10-23 18:59:31 +0300
commit216218308cfb0939aeecb246b34faf6e179c8d57 (patch)
treeac012bba6a2ab6728d7747b57cbf7fdc4a892912 /arch/arm/Kconfig-nommu
parent5c9d9a1b3a540779ba3f2d5e81150b2d92dcb74a (diff)
downloadlinux-216218308cfb0939aeecb246b34faf6e179c8d57.tar.xz
ARM: 8713/1: NOMMU: Support MPU in XIP configuration
Currently, there is assumption in early MPU setup code that kernel image is located in RAM, which is obviously not true for XIP. To run code from ROM we need to make sure that it is covered by MPU. However, due to we allocate regions (semi-)dynamically we can run into issue of trimming region we are running from in case ROM spawns several MPU regions. To help deal with that we enforce minimum alignments for start end end of XIP address space as 1MB and 128Kb correspondingly. Tested-by: Alexandre TORGUE <alexandre.torgue@st.com> Tested-by: Benjamin Gaignard <benjamin.gaignard@linaro.org> Signed-off-by: Vladimir Murzin <vladimir.murzin@arm.com> Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Diffstat (limited to 'arch/arm/Kconfig-nommu')
-rw-r--r--arch/arm/Kconfig-nommu2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm/Kconfig-nommu b/arch/arm/Kconfig-nommu
index 930e000489a8..0fad7d943630 100644
--- a/arch/arm/Kconfig-nommu
+++ b/arch/arm/Kconfig-nommu
@@ -52,7 +52,7 @@ config REMAP_VECTORS_TO_RAM
config ARM_MPU
bool 'Use the ARM v7 PMSA Compliant MPU'
- depends on !XIP_KERNEL && (CPU_V7 || CPU_V7M)
+ depends on CPU_V7 || CPU_V7M
default y if CPU_V7
help
Some ARM systems without an MMU have instead a Memory Protection