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[ion] After a reset, invalidate the data/instruction caches

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This commit is contained in:
Léa Saviot
2019-03-20 15:47:46 +01:00
parent 079d947955
commit ac7c5e8e36
2 changed files with 9 additions and 3 deletions
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2
ion/src/device/shared/boot/Makefile
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@@ -1,4 +1,4 @@
src += $(addprefix ion/src/device/shared/boot/, \
ion_device_src += $(addprefix ion/src/device/shared/boot/, \
isr.c \
rt0.cpp \
)

10
ion/src/device/shared/boot/rt0.cpp
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@@ -5,6 +5,7 @@
#include "../drivers/board.h"
#include "../drivers/reset.h"
#include "../drivers/timing.h"
#include <drivers/cache.h>
typedef void (*cxx_constructor)();
@@ -41,8 +42,13 @@ static void __attribute__((noinline)) non_inlined_ion_main() {
}
void start() {
// This is where execution starts after reset.
// Many things are not initialized yet so the code here has to pay attention.
/* This is where execution starts after reset.
* Many things are not initialized yet so the code here has to pay attention. */
/* First of all, reset the data/instruction caches. Indeed, if we do not, "an
* UNPREDICTIBLE behavior can occur".*/
Ion::Device::Cache::invalidateDCache();
Ion::Device::Cache::invalidateICache();
/* Copy data section to RAM
* The data section is R/W but its initialization value matters. It's stored