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| author | Vladimir Murzin <vladimir.murzin@arm.com> | 2017-10-16 15:00:45 +0300 |
|---|---|---|
| committer | Russell King <rmk+kernel@armlinux.org.uk> | 2017-10-23 18:59:31 +0300 |
| commit | 216218308cfb0939aeecb246b34faf6e179c8d57 (patch) | |
| tree | ac012bba6a2ab6728d7747b57cbf7fdc4a892912 /arch/arm/Kconfig-nommu | |
| parent | 5c9d9a1b3a540779ba3f2d5e81150b2d92dcb74a (diff) | |
| download | linux-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-nommu | 2 |
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 |