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-# SPDX-License-Identifier: GPL-2.0
-#
-# MN10300 CPU cache options
-#
-
-choice
- prompt "CPU Caching mode"
- default MN10300_CACHE_WBACK
- help
- This option determines the caching mode for the kernel.
-
- Write-Back caching mode involves the all reads and writes causing
- the affected cacheline to be read into the cache first before being
- operated upon. Memory is not then updated by a write until the cache
- is filled and a cacheline needs to be displaced from the cache to
- make room. Only at that point is it written back.
-
- Write-Through caching only fetches cachelines from memory on a
- read. Writes always get written directly to memory. If the affected
- cacheline is also in cache, it will be updated too.
-
- The final option is to turn of caching entirely.
-
-config MN10300_CACHE_WBACK
- bool "Write-Back"
- help
- The dcache operates in delayed write-back mode. It must be manually
- flushed if writes are made that subsequently need to be executed or
- to be DMA'd by a device.
-
-config MN10300_CACHE_WTHRU
- bool "Write-Through"
- help
- The dcache operates in immediate write-through mode. Writes are
- committed to RAM immediately in addition to being stored in the
- cache. This means that the written data is immediately available for
- execution or DMA.
-
- This is not available for use with an SMP kernel if cache flushing
- and invalidation by automatic purge register is not selected.
-
-config MN10300_CACHE_DISABLED
- bool "Disabled"
- help
- The icache and dcache are disabled.
-
-endchoice
-
-config MN10300_CACHE_ENABLED
- def_bool y if !MN10300_CACHE_DISABLED
-
-
-choice
- prompt "CPU cache flush/invalidate method"
- default MN10300_CACHE_MANAGE_BY_TAG if !AM34_2
- default MN10300_CACHE_MANAGE_BY_REG if AM34_2
- depends on MN10300_CACHE_ENABLED
- help
- This determines the method by which CPU cache flushing and
- invalidation is performed.
-
-config MN10300_CACHE_MANAGE_BY_TAG
- bool "Use the cache tag registers directly"
- depends on !(SMP && MN10300_CACHE_WTHRU)
-
-config MN10300_CACHE_MANAGE_BY_REG
- bool "Flush areas by way of automatic purge registers (AM34 only)"
- depends on AM34_2
-
-endchoice
-
-config MN10300_CACHE_INV_BY_TAG
- def_bool y if MN10300_CACHE_MANAGE_BY_TAG && MN10300_CACHE_ENABLED
-
-config MN10300_CACHE_INV_BY_REG
- def_bool y if MN10300_CACHE_MANAGE_BY_REG && MN10300_CACHE_ENABLED
-
-config MN10300_CACHE_FLUSH_BY_TAG
- def_bool y if MN10300_CACHE_MANAGE_BY_TAG && MN10300_CACHE_WBACK
-
-config MN10300_CACHE_FLUSH_BY_REG
- def_bool y if MN10300_CACHE_MANAGE_BY_REG && MN10300_CACHE_WBACK
-
-
-config MN10300_HAS_CACHE_SNOOP
- def_bool n
-
-config MN10300_CACHE_SNOOP
- bool "Use CPU Cache Snooping"
- depends on MN10300_CACHE_ENABLED && MN10300_HAS_CACHE_SNOOP
- default y
-
-config MN10300_CACHE_FLUSH_ICACHE
- def_bool y if MN10300_CACHE_WBACK && !MN10300_CACHE_SNOOP
- help
- Set if we need the dcache flushing before the icache is invalidated.
-
-config MN10300_CACHE_INV_ICACHE
- def_bool y if MN10300_CACHE_WTHRU && !MN10300_CACHE_SNOOP
- help
- Set if we need the icache to be invalidated, even if the dcache is in
- write-through mode and doesn't need flushing.
-
-#
-# The kernel debugger gets its own separate cache flushing functions
-#
-config MN10300_DEBUGGER_CACHE_FLUSH_BY_TAG
- def_bool y if KERNEL_DEBUGGER && \
- MN10300_CACHE_WBACK && \
- !MN10300_CACHE_SNOOP && \
- MN10300_CACHE_MANAGE_BY_TAG
- help
- Set if the debugger needs to flush the dcache and invalidate the
- icache using the cache tag registers to make breakpoints work.
-
-config MN10300_DEBUGGER_CACHE_FLUSH_BY_REG
- def_bool y if KERNEL_DEBUGGER && \
- MN10300_CACHE_WBACK && \
- !MN10300_CACHE_SNOOP && \
- MN10300_CACHE_MANAGE_BY_REG
- help
- Set if the debugger needs to flush the dcache and invalidate the
- icache using automatic purge registers to make breakpoints work.
-
-config MN10300_DEBUGGER_CACHE_INV_BY_TAG
- def_bool y if KERNEL_DEBUGGER && \
- MN10300_CACHE_WTHRU && \
- !MN10300_CACHE_SNOOP && \
- MN10300_CACHE_MANAGE_BY_TAG
- help
- Set if the debugger needs to invalidate the icache using the cache
- tag registers to make breakpoints work.
-
-config MN10300_DEBUGGER_CACHE_INV_BY_REG
- def_bool y if KERNEL_DEBUGGER && \
- MN10300_CACHE_WTHRU && \
- !MN10300_CACHE_SNOOP && \
- MN10300_CACHE_MANAGE_BY_REG
- help
- Set if the debugger needs to invalidate the icache using automatic
- purge registers to make breakpoints work.
-
-config MN10300_DEBUGGER_CACHE_NO_FLUSH
- def_bool y if KERNEL_DEBUGGER && \
- (MN10300_CACHE_DISABLED || MN10300_CACHE_SNOOP)
- help
- Set if the debugger does not need to flush the dcache and/or
- invalidate the icache to make breakpoints work.