1 /* SPDX-License-Identifier: GPL-2.0 */
3 * linux/arch/arm/boot/compressed/head-xscale.S
5 * XScale specific tweaks. This is merged into head.S by the linker.
9 #include <linux/linkage.h>
11 .section ".start", "ax"
15 @ Preserve r8/r7 i.e. kernel entry values
17 @ Data cache might be active.
18 @ Be sure to flush kernel binary out of the cache,
19 @ whatever state it is, before it is turned off.
20 @ This is done by fetching through currently executed
21 @ memory to be sure we hit the same cache.
23 add r3, r2, #0x10000 @ 64 kb is quite enough...
27 mcr p15, 0, r0, c7, c10, 4 @ drain WB
28 mcr p15, 0, r0, c7, c7, 0 @ flush I & D caches
30 @ disabling MMU and caches
31 mrc p15, 0, r0, c1, c0, 0 @ read control reg
32 bic r0, r0, #0x05 @ clear DC, MMU
33 bic r0, r0, #0x1000 @ clear Icache
34 mcr p15, 0, r0, c1, c0, 0