treewide: Add a function to change page permissions
For armv8 we are adding proper page permissions for the relocated U-Boot
binary. Add a weak function that can be used across architectures to change
the page permissions
Tested-by: Neil Armstrong <neil.armstrong@linaro.org> # on AML-S905X-CC
Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
diff --git a/include/cpu_func.h b/include/cpu_func.h
index 7e81c43..70a41ea 100644
--- a/include/cpu_func.h
+++ b/include/cpu_func.h
@@ -69,6 +69,23 @@
void invalidate_dcache_range(unsigned long start, unsigned long stop);
void invalidate_dcache_all(void);
void invalidate_icache_all(void);
+
+enum pgprot_attrs {
+ MMU_ATTR_RO,
+ MMU_ATTR_RX,
+ MMU_ATTR_RW,
+};
+
+/** pgprot_set_attrs() - Set page table permissions
+ *
+ * @addr: Physical address start
+ * @size: size of memory to change
+ * @perm: New permissions
+ *
+ * Return: 0 on success, error otherwise.
+ **/
+int pgprot_set_attrs(phys_addr_t addr, size_t size, enum pgprot_attrs perm);
+
/**
* noncached_init() - Initialize non-cached memory region
*