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STM32U5: Only try and invalidate cache if enabled.

pull/465/head
David Garske 2024-06-25 10:05:31 -07:00 committed by Daniele Lacamera
parent a92c1b9ad9
commit 1967cc2670
1 changed files with 8 additions and 3 deletions
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11
hal/stm32u5.c
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@ -540,15 +540,20 @@ void hal_cache_disable(void)
void hal_cache_invalidate(void) void hal_cache_invalidate(void)
{ {
/* Check if no ongoing operation */ /* only try and invalidate cache if enabled */
if ((ICACHE_CR & ICACHE_CR_CEN) == 0)
return;
/* If cache invalidate not in progress, start it */
if ((ICACHE_SR & ICACHE_SR_BUSYF) == 0) { if ((ICACHE_SR & ICACHE_SR_BUSYF) == 0) {
/* Launch cache invalidation */ /* Start invalidate */
ICACHE_CR |= ICACHE_CR_CACHEINV; ICACHE_CR |= ICACHE_CR_CACHEINV;
} }
/* If cache invalidate is active, wait for busy end flag */
if (ICACHE_SR & ICACHE_SR_BUSYF) { if (ICACHE_SR & ICACHE_SR_BUSYF) {
while ((ICACHE_SR & ICACHE_SR_BSYENDF) == 0); while ((ICACHE_SR & ICACHE_SR_BSYENDF) == 0);
} }
/* Clear BSYENDF */ /* Clear busy end flag */
ICACHE_SR |= ICACHE_SR_BSYENDF; ICACHE_SR |= ICACHE_SR_BSYENDF;
} }