gustavonihei commented on a change in pull request #4699:
URL: https://github.com/apache/incubator-nuttx/pull/4699#discussion_r732189613
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File path: include/nuttx/cache.h
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@@ -132,6 +132,70 @@ void up_invalidate_icache_all(void);
# define up_invalidate_icache_all()
#endif
+/****************************************************************************
+ * Name: up_lock_icache
+ *
+ * Description:
+ * lock the instruction cache within the specified region.
+ * If the specified address if not present in the instruction cache,
+ * Some archs transfer the line from memory, other archs wait the
+ * address be read from memory, and then lock.
+ * Input Parameters:
+ * start - virtual start address of region
+ * end - virtual end address of region + 1
+ *
+ * Returned Value:
+ * None
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_ARCH_ICACHE_LOCK
+void up_lock_icache(uintptr_t start, uint32_t end);
+#else
+# define up_lock_icache()
+#endif
+
+/****************************************************************************
+ * Name: up_unlock_icache
+ *
+ * Description:
+ * Unlock the instruction cache within the specified region.
+ *
+ * Input Parameters:
+ * start - virtual start address of region
+ * end - virtual end address of region + 1
+ *
+ * Returned Value:
+ * None
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_ARCH_ICACHE_LOCK
+void up_unlock_icache(uintptr_t start, uint32_t end);
Review comment:
```suggestion
void up_unlock_icache(uintptr_t start, uintptr_t end);
```
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