arm64: Update memcpy_{from, to}io() helpers

At early U-Boot stage, before relocation, MMU is not yet configured
and disabled. DDR may not be configured with the correct memory
attributes (can be configured in MT_DEVICE instead of MT_MEMORY).

In this case, usage of memcpy_{from, to}io() may leads to synchronous
abort in AARCH64 in case the normal memory address is not 64Bits aligned.

To avoid such situation, forbid usage of normal memory cast to (u64 *) in
case MMU is not enabled.

Signed-off-by: Patrice Chotard <patrice.chotard@foss.st.com>
Reviewed-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Cc: mark.kettenis@xs4all.nl
Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>

This commit is contained in:

Patrice Chotard

2021-07-28 19:30:22 -04:00

committed by

Tom Rini

parent 558e699d15

commit 268f6ac1f9

3 changed files with 26 additions and 10 deletions

									
										include/cpu_func.h
									
		+1
		
												View File
												
				@@ -59,6 +59,7 @@ int dcache_status(void);

				void dcache_enable(void);

				void dcache_disable(void);

				void mmu_disable(void);

				int mmu_status(void);

				/* arch/$(ARCH)/lib/cache.c */

				void enable_caches(void);