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Add option for memory barriers everywhere

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This commit is contained in:
Jeroen Domburg 2017-03-27 15:01:30 +08:00
parent 58e8763874
commit 4fd173c8c3
2 changed files with 11 additions and 0 deletions
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7
components/esp32/Kconfig
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@ -165,6 +165,13 @@ config SPIRAM_CACHE_WORKAROUND
when the cache line needs to be fetched from external RAM and an interrupt occurs. This enables a
fix in the compiler that makes sure the specific code that is vulnerable to this will not be emitted.
config SPIRAM_CACHE_ALWAYS_MEMBARRIER
bool "Heavy-handed workaround for bug: Always do memory barrier"
default "n"
help
This will introduce a memory barrier before EVERY load/store. This will get rid of most coherency
issues, but at the cost of a lot of performance. Don't enable unless you know you need this!
config SPIRAM_CACHE_WORKAROUND_TEST
bool "Debug: Test workaround by generating a lot of interrupts"
default "n"

4
make/project.mk
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@ -244,6 +244,10 @@ ifeq ("$(CONFIG_SPIRAM_CACHE_WORKAROUND)", "y")
COMMON_FLAGS+=-mfix-esp32-psram-cache-issue
endif
ifeq ("$(CONFIG_SPIRAM_CACHE_ALWAYS_MEMBARRIER)", "y")
COMMON_FLAGS+=-malways-memw
endif
# Enable generation of debugging symbols
# (we generate even in Release mode, as this has no impact on final binary size.)
DEBUG_FLAGS ?= -ggdb