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drv: nordic_vpr_launcher: manage data cache

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Write-back cache after copying VPR's code and data to the destination
memory. It allows VPRs to run from RAM regions cacheable by its host.

It allows to use FLPR in nRF54H20.

Signed-off-by: Hubert Miś <hubert.mis@nordicsemi.no>
This commit is contained in:
Hubert Miś 2025-01-16 17:23:27 +01:00 committed by Benjamin Cabé
parent 6d9513ef35
commit 1ef2df5c32
1 changed files with 6 additions and 0 deletions
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6
drivers/misc/nordic_vpr_launcher/nordic_vpr_launcher.c
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@ -7,6 +7,7 @@
#include <string.h> #include <string.h>
#include <zephyr/cache.h>
#include <zephyr/devicetree.h> #include <zephyr/devicetree.h>
#include <zephyr/init.h> #include <zephyr/init.h>
#include <zephyr/logging/log.h> #include <zephyr/logging/log.h>
@ -38,6 +39,11 @@ static int nordic_vpr_launcher_init(const struct device *dev)
LOG_DBG("Loading VPR (%p) from %p to %p (%zu bytes)", config->vpr, LOG_DBG("Loading VPR (%p) from %p to %p (%zu bytes)", config->vpr,
(void *)config->src_addr, (void *)config->exec_addr, config->size); (void *)config->src_addr, (void *)config->exec_addr, config->size);
memcpy((void *)config->exec_addr, (void *)config->src_addr, config->size); memcpy((void *)config->exec_addr, (void *)config->src_addr, config->size);
#if defined(CONFIG_DCACHE)
LOG_DBG("Writing back cache with loaded VPR (from %p %zu bytes)",
(void *)config->exec_addr, config->size);
sys_cache_data_flush_range((void *)config->exec_addr, config->size);
#endif
} }
#endif #endif