jlaitine commented on code in PR #7270:
URL: https://github.com/apache/incubator-nuttx/pull/7270#discussion_r991332701
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arch/risc-v/src/mpfs/Kconfig:
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@@ -157,6 +157,13 @@ config MPFS_DDR_TYPE
default 3 if MPFS_DDR_TYPE_LPDDR3
default 4 if MPFS_DDR_TYPE_LPDDR4
+config MPFS_ENABLE_CACHE
+ bool "Enable L2 cache"
+ depends on MPFS_BOOTLOADER
Review Comment:
The MPFS_BOOTLOADER option is used when building a nuttx image which does
memory and clock configuration (i.e. boots stand alone from power on reset). If
one uses some external bootloader (HSS, another nuttx instance or such), the
cache enablement needs to be done in that one. Especially if running multiple
OS's in parallel, it only makes sense to configure the cache in the boot. Also,
cache enablement can only be done on the E51 hart, and not from anything
running on U54's. Original code enabled the L2 cache always with
MPFS_BOOTLOADER. This change only makes it possible to also disable the cache.
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