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@xxxxxxxxxx> --- arch/arm/boot/compressed/head.S | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/arch/arm/boot/compressed/head.S b/arch/arm/boot/compressed/head.S index 39f7071d47c7..8487221bedb0 100644 --- a/arch/arm/boot/compressed/head.S +++ b/arch/arm/boot/compressed/head.S @@ -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 -- 2.17.1
