diff options
| author | Patrick Delaunay <patrick.delaunay@st.com> | 2020-04-10 16:02:02 +0200 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2020-05-01 11:34:01 -0400 |
| commit | f8dc7f2f18d324343737c72e27b6bd0ee8ff728e (patch) | |
| tree | ccab976640c82f0530290fcdbfde1807055be034 /arch/arm/Kconfig | |
| parent | e7882f65f02eca5a7d35871ba0355462bbf7362e (diff) | |
configs: migrate CONFIG_SYS_ARM_CACHE_* in Kconfig
Move CONFIG_SYS_ARM_CACHE_WRITETHROUGH and
CONFIG_SYS_ARM_CACHE_WRITEALLOC into Kconfig done by moveconfig.py.
Kconfig uses a choice between the 3 values supported in U-Boot,
including the new configuration CONFIG_SYS_ARM_CACHE_WRITEBACK
(the default configuration).
The patch also avoids to select simultaneously 2 configurations.
Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
Diffstat (limited to 'arch/arm/Kconfig')
| -rw-r--r-- | arch/arm/Kconfig | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 8e67e1c587..8b6c6a2965 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -340,6 +340,34 @@ config SYS_CACHELINE_SIZE default 64 if SYS_CACHE_SHIFT_6 default 32 if SYS_CACHE_SHIFT_5 +choice + prompt "Select the ARM data write cache policy" + default SYS_ARM_CACHE_WRITETHROUGH if TARGET_BCMCYGNUS || \ + TARGET_BCMNSP || CPU_PXA || RZA1 + default SYS_ARM_CACHE_WRITEBACK + +config SYS_ARM_CACHE_WRITEBACK + bool "Write-back (WB)" + help + A write updates the cache only and marks the cache line as dirty. + External memory is updated only when the line is evicted or explicitly + cleaned. + +config SYS_ARM_CACHE_WRITETHROUGH + bool "Write-through (WT)" + help + A write updates both the cache and the external memory system. + This does not mark the cache line as dirty. + +config SYS_ARM_CACHE_WRITEALLOC + bool "Write allocation (WA)" + help + A cache line is allocated on a write miss. This means that executing a + store instruction on the processor might cause a burst read to occur. + There is a linefill to obtain the data for the cache line, before the + write is performed. +endchoice + config ARCH_CPU_INIT bool "Enable ARCH_CPU_INIT" help |