1/*
2 * linux/arch/arm/boot/compressed/head-xscale.S
3 *
4 * XScale specific tweaks.  This is merged into head.S by the linker.
5 *
6 */
7
8#include <linux/linkage.h>
9
10		.section        ".start", "ax"
11
12__XScale_start:
13
14		@ Preserve r8/r7 i.e. kernel entry values
15
16		@ Data cache might be active.
17		@ Be sure to flush kernel binary out of the cache,
18		@ whatever state it is, before it is turned off.
19		@ This is done by fetching through currently executed
20		@ memory to be sure we hit the same cache.
21		bic	r2, pc, #0x1f
22		add	r3, r2, #0x10000	@ 64 kb is quite enough...
231:		ldr	r0, [r2], #32
24		teq	r2, r3
25		bne	1b
26		mcr	p15, 0, r0, c7, c10, 4	@ drain WB
27		mcr	p15, 0, r0, c7, c7, 0	@ flush I & D caches
28
29		@ disabling MMU and caches
30		mrc	p15, 0, r0, c1, c0, 0	@ read control reg
31		bic	r0, r0, #0x05		@ clear DC, MMU
32		bic	r0, r0, #0x1000		@ clear Icache
33		mcr	p15, 0, r0, c1, c0, 0
34
35#ifdef CONFIG_ARCH_IXP2000
36		mov	r1, #-1
37		mov	r0, #0xd6000000
38		str	r1, [r0, #0x14]
39		str	r1, [r0, #0x18]
40#endif
41
42