Commit e951a1f4 authored Feb 19, 2020 by Ard Biesheuvel

efi/arm: Pass start and end addresses to cache_clean_flush()



In preparation for turning the decompressor's cache clean/flush
operations into proper by-VA maintenance for v7 cores, pass the
start and end addresses of the regions that need cache maintenance
into cache_clean_flush in registers r0 and r1.

Currently, all implementations of cache_clean_flush ignore these
values, so no functional change is expected as a result of this
patch.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>

parent c7225494

arch/arm/boot/compressed/head.S

+6 −0

Original line number	Diff line number	Diff line
		@@ -1460,6 +1460,12 @@ ENTRY(efi_stub_entry)

		@ Preserve return value of efi_entry() in r4
		mov r4, r0
		add r1, r4, #SZ_2M @ DT end
		bl cache_clean_flush

		ldr r0, [sp] @ relocated zImage
		ldr r1, =_edata @ size of zImage
		add r1, r1, r0 @ end of zImage
		bl cache_clean_flush

		@ The PE/COFF loader might not have cleaned the code we are

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